feat✨: check the shutdown budget against every stop deadline

The budget is one number in config/settings.yml. The deadlines that have to
cover it are in four other files, none of which anybody edits while thinking
about shutdown - so raising the budget passes every test, deploys, and has the
cleanup callbacks killed on the next release.

Two checks share one arithmetic and one five-second margin.

shutdown-budget-overruns-grace compares preStop + drain + server + cleanup
against terminationGracePeriodSeconds in the shipped manifest. Those two files
are not merely adjacent examples: scripts/k8s/prerun.sh builds the
settings-admin ConfigMap out of config/settings.yml and the Deployment mounts
it, so the manifest deploys that file.

docker-stop-cuts-shutdown-short covers the three ways this container is
stopped: `docker stop` in the release workflow, the same in the Makefile, and
stop_grace_period on a compose service that runs this repository's own image. A
service running a database is not this process and is left alone. The duration
is parsed rather than scanned for digits - compose accepts 1m30s, and reading
the first number out of it would call ninety seconds one.

All three spellings of the deadline are read: --timeout, the deprecated --time,
and the short -t. A deadline the check cannot read is reported as no deadline at
all, so recognising only one of them would call a correct command broken and
send whoever fixed it towards the spelling docker is retiring. The message
quotes the flag back in the spelling it was written in, for the same reason:
suggesting a flag the line does not use is how a tool teaches people to
disbelieve it.

What neither covers is `docker rm -f`, which has no deadline to compare
against: it is SIGKILL by definition. That gap is deliberate, and it is why the
previous commit changed the one place that used it on a container that might
still be running.

Both report at two levels. A budget that already overruns is an ERROR; one that
fits with nothing to spare is a WARN, because it works today and failing the
build on a working configuration is how a project teaches people to ignore its
warnings. The two are exclusive: an overrun satisfies the headroom condition as
well, and an ERROR that always drags a duplicate WARN behind it teaches the same
lesson.

preStop is in the sum although the shipped manifest has no hook. That is the
point - a hook added later is spent before the process is told anything, and a
self-check that could not see it would understate the real budget by however
long somebody set it to, which is worse than not checking. A hook whose duration
cannot be read is reported rather than counted as zero.

The fallbacks for fields the settings file leaves out are read from the
constants in the scanned tree, not copied here; if they are renamed the run
stops instead of going quiet with the wrong numbers.

The wording differs by audience on purpose. At run time this is somebody else's
deployment under constraints the process cannot see, so the log states a
minimum. These checks read files this repository owns, where there is standing
to ask for headroom, so they name a target.

The table in AGENTS.md is relisted while it is being touched: the two new
checks, plus datascope-route-unguarded, which has been missing since it was
added. The hard-coded count is gone - it said seven and there were ten, which is
what a written-down count does. AGENTS.md and docs/contract.md both sent readers
to `go run ./tools/checksilent -h` for the list of checks; that prints
command-line flags and has never printed a check, so both now point at
runChecks.

The yaml parser moves from an indirect requirement to a direct one - it was
already in the module graph - and tidy drops four go.sum lines left over from
two older releases of core.

.github/workflows/build.yml

@@ -115,7 +115,14 @@ jobs:
             if sudo docker ps -a --format '{{.Names}}' | grep -qx "$NAME"; then
               sudo docker rm -f "$PREV" >/dev/null 2>&1 || true
               sudo docker rename "$NAME" "$PREV"
-              sudo docker stop "$PREV" >/dev/null
+              # --timeout, because the default is 10 seconds and the process
+              # spends drain + server + cleanup from extend.shutdown before it
+              # exits - 8 seconds out of the box, and more for anyone who
+              # configures a drain window. Past the deadline docker sends
+              # SIGKILL and the cleanup callbacks are cut off part-way through.
+              # checksilent's docker-stop-cuts-shutdown-short check compares
+              # this number against config/settings.yml.
+              sudo docker stop --timeout 30 "$PREV" >/dev/null
             fi
 
             sudo docker run -d -p 8000:8000 \

.github/workflows/go.yml

@@ -15,6 +15,27 @@ jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
+
+    # The queue's ordering rule - consumers registered before the queue is
+    # started - is invisible on the memory backend, which is the default and
+    # therefore what every other test runs on: queue.Memory's Register starts a
+    # consumer goroutine whatever the state. Only redis refuses a late
+    # registration, so without a server here the tests that cover it would skip
+    # and the suite would report success for a queue that accepts no consumers.
+    services:
+      redis:
+        image: redis:7-alpine
+        ports:
+          - 6379:6379
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 5s
+          --health-timeout 3s
+          --health-retries 10
+
+    env:
+      GO_ADMIN_TEST_REDIS_ADDR: 127.0.0.1:6379
+
     steps:
 
     - name: Set up Go 1.26

AGENTS.md

@@ -125,9 +125,12 @@ func (SysPost) TableName() string { return "sys_post" }
 两条与主仓贡献者直接相关的：
 
 - **`common/`、`core/` 不得 import `app/`** —— `make checksilent` 在 CI 里守着，违反即红。
+- **从 core 契约包声明出来的类型必须写成别名**（`type X = pkg.Y`，不是 `type X pkg.Y`）
+  —— `contract-shim-alias` 检查守着。defined type 会丢掉整个方法集，
+  而且**不一定在本仓编译失败**，理由见 `docs/contract.md` 末节。
 - **注册类 API（`AppRouters` / `sdk.Runtime.SetAppRouters` / `migration.ForApp`）
-  只允许在 `init()` 中调用** —— 注册期靠 Go 的包初始化顺序保证无并发写，
-  core 侧的 setter 没有加锁。
+  必须在 `runStartupHooks()` 之前调用完** —— `init()` 是最省事的位置，
+  但约束的是**顺序**，不是写在哪个函数里；晚到的注册会被丢弃并只记一条 ERROR。
 
 ## 路由注册
 
@@ -191,7 +194,8 @@ go run -tags sqlite3 . server  -c config/settings.sqlite.yml
 
 ## 数据库迁移
 
-文件名前 13 位为时间戳版本号。**已执行过的迁移文件不可修改** ——
+文件名前 13 位为毫秒时间戳版本号，不合规的名字会在启动时 panic 并报出该文件名。
+**已执行过的迁移文件不可修改** ——
 `sys_migration` 表按版本号去重，改动不会重跑，只能新增一个迁移来修正。
 
 放哪个目录取决于身份：
@@ -223,8 +227,9 @@ go run -tags sqlite3 . server  -c config/settings.sqlite.yml
 
 ## 静默失败校验
 
-`make checksilent` 检查六类**不报错、不记日志、行为悄悄变得不对**的问题，
-CI 会跑，命中 ERROR 即失败：
+`make checksilent` 逐条检查那些**不报错、不记日志、行为悄悄变得不对**的问题，
+CI 会跑，命中 ERROR 即失败。这里不写条数——写死的数字会悄悄过时，
+真正的清单是 `tools/checksilent/checks.go` 里 `runChecks` 跑的那几个：
 
 | 检查 | 级别 | 静默后果 |
 |---|---|---|
@@ -233,8 +238,16 @@ CI 会跑，命中 ERROR 即失败：
 | `config-value-truncation` | ERROR | `sys_config.config_value` 超 255 字符被静默截断 |
 | `menu-id-collision` | ERROR | 两个模块硬编码同一菜单 ID，互相覆盖 |
 | `contract-import-boundary` | ERROR | 契约包 import `app/`，应用无法独立编译 |
+| `contract-shim-alias` | ERROR | 契约薄壳写成 defined type 而非别名，方法集丢失，本仓可能照常编译、第三方应用编译不过 |
+| `datascope-route-unguarded` | ERROR | handler 读调用方的数据权限，而注册它的路由组没装提供权限的中间件。取不到时拿到零值、走 fail-closed 分支，查询被塞进 `1 = 0`：接口对确实存在的行返回「查不到」，且只在 `enabledp: true` 的部署上出现 |
+| `shutdown-budget-overruns-grace` | ERROR / WARN | `settings.yml` 的 `extend.shutdown` 预算（含清单里的 `preStop`）放不进自带 k8s 清单的 `terminationGracePeriodSeconds`，SIGKILL 在清理回调跑到一半时到达 |
+| `docker-stop-cuts-shutdown-short` | ERROR / WARN | 停止容器的两条路径——脚本/工作流里的 `docker stop`，和 `docker-compose.yml` 的 `stop_grace_period`——没写或写得不够关闭预算用。两边默认都是 10 秒，而这个数字离命令很远，调大预算的人不会想起它 |
 | `menu-name-mismatch` | WARN | 菜单名与前端组件 `name` 不一致，keep-alive 缓存静默失效 |
 
+两条关闭预算检查分两级，用的是同一条算术和同一个 5 秒边际：真的超限报 ERROR，
+放得进但余量不足 5 秒报 WARN。余量不足做 WARN 不做 ERROR，是因为那是个技术上
+跑得通的配置——**一条在正确配置下也会响的 ERROR，训练的是忽略它**。
+
 最后一条要跨仓库比对，只能做正则启发式，因此是 WARN，**不影响退出码**，
 且默认跳过；要跑它得指定前端目录：
 

Makefile

@@ -15,7 +15,16 @@ build-sqlite:
 # make run
 run:
     # delete go-admin-api container
-	@if [ $(shell docker ps -aq --filter name=go-admin --filter publish=8000) ]; then docker rm -f go-admin; fi
+    #
+    # stop then rm, rather than `rm -f`. The force flag kills a running
+    # container with SIGKILL and no grace at all, so restarting locally cut
+    # short every shutdown this application does - the drain window was never
+    # once reached on a developer's machine. --timeout has to cover
+    # extend.shutdown's drain + server + cleanup; checksilent's
+    # docker-stop-cuts-shutdown-short check compares it against
+    # config/settings.yml. On a container that has already stopped, stop is a
+    # no-op and the removal is unchanged.
+	@if [ $(shell docker ps -aq --filter name=go-admin --filter publish=8000) ]; then docker stop --timeout 30 go-admin && docker rm go-admin; fi
 
     # 启动方法一 run go-admin-api container  docker-compose 启动方式
     # 进入到项目根目录 执行 make run 命令

app/admin/apis/sys_user.go

@@ -444,7 +444,6 @@ func (e SysUser) GetInfo(c *gin.Context) {
 		e.Error(500, err, err.Error())
 		return
 	}
-	p := actions.GetPermissionFromContext(c)
 	var roles = make([]string, 1)
 	roles[0] = user.GetRoleName(c)
 	var permissions = make([]string, 1)
@@ -464,7 +463,14 @@ func (e SysUser) GetInfo(c *gin.Context) {
 	}
 	sysUser := models.SysUser{}
 	req.Id = user.GetUserId(c)
-	err = s.Get(&req, p, &sysUser)
+	// Unscoped on purpose: the id is the caller's own, taken from the token.
+	// This used to go through Get with whatever GetPermissionFromContext
+	// returned - and this route installs no PermissionAction, so that was the
+	// zero value. An unset scope is not a recognised one, so once unknown
+	// scopes started failing closed rather than silently matching everything,
+	// every login on a deployment with enabledp: true ended here with a 401
+	// and the browser went straight back to the login page.
+	err = s.GetSelf(&req, &sysUser)
 	if err != nil {
 		e.Error(http.StatusUnauthorized, err, "登录失败")
 		return

app/admin/models/sys_api.go

@@ -23,6 +23,10 @@ type SysApi struct {
 	Path   string `json:"path" gorm:"size:128;comment:地址"`
 	Action string `json:"action" gorm:"size:16;comment:请求类型"`
 	Type   string `json:"type" gorm:"size:16;comment:接口类型"`
+	// AppCode identifies which application's seed.SeedMenus call wrote this
+	// row; empty for the host's own built-in APIs. Same NOT NULL DEFAULT ''
+	// reasoning as SysMenu.AppCode.
+	AppCode string `json:"appCode" gorm:"type:varchar(64);not null;default:'';index:idx_sys_api_app_code;comment:AppCode"`
 	models.ModelTime
 	models.ControlBy
 }

app/admin/models/sys_menu.go

@@ -26,6 +26,12 @@ type SysMenu struct {
 	RoleId     int       `gorm:"-"`
 	Children   []SysMenu `json:"children,omitempty" gorm:"-"`
 	IsSelect   bool      `json:"is_select" gorm:"-"`
+	// AppCode identifies which application's seed.SeedMenus call wrote this
+	// row; empty for the host's own built-in menus. NOT NULL DEFAULT '' for
+	// the same reason sys_migration.app_code is (see contract/models.Migration):
+	// AutoMigrate adding this column to an existing table leaves every
+	// pre-existing row reading back as "" rather than NULL.
+	AppCode string `json:"appCode" gorm:"type:varchar(64);not null;default:'';index:idx_sys_menu_app_code;comment:AppCode"`
 	models.ControlBy
 	models.ModelTime
 }

app/admin/router/init_router.go

@@ -25,11 +25,9 @@ func InitRouter() {
 		os.Exit(-1)
 	}
 
-	// the jwt middleware
-	authMiddleware, err := common.AuthInit()
-	if err != nil {
-		log.Fatalf("JWT Init Error, %s", err.Error())
-	}
+	// the jwt middleware: shared instance InitMiddleware built at startup,
+	// not one built here per module (see common/middleware.GetAuthMiddleware).
+	authMiddleware := common.GetAuthMiddleware()
 
 	// 注册系统路由
 	InitSysRouter(r, authMiddleware)

app/admin/router/sys_api.go

@@ -5,6 +5,7 @@ import (
 	jwt "github.com/go-admin-team/go-admin-core/v2/jwtauth"
 
 	"go-admin/app/admin/apis"
+	"go-admin/common/actions"
 	"go-admin/common/middleware"
 )
 
@@ -15,7 +16,10 @@ func init() {
 // registerSysApiRouter
 func registerSysApiRouter(v1 *gin.RouterGroup, authMiddleware *jwt.GinJWTMiddleware) {
 	api := apis.SysApi{}
-	r := v1.Group("/sys-api").Use(authMiddleware.MiddlewareFunc()).Use(middleware.AuthCheckRole())
+	// PermissionAction is not optional here: all three handlers below read the
+	// data permission out of the context, and without it they read the zero
+	// value - an unset scope, which Permission now fails closed on.
+	r := v1.Group("/sys-api").Use(authMiddleware.MiddlewareFunc()).Use(middleware.AuthCheckRole()).Use(actions.PermissionAction())
 	{
 		r.GET("", api.GetPage)
 		r.GET("/:id", api.Get)

app/admin/service/seed.go

@@ -0,0 +1,308 @@
+package service
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"gorm.io/gorm"
+
+	contractmodels "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/seed"
+
+	"go-admin/app/admin/models"
+)
+
+// adminSeeder is go-admin's own implementation of seed.Seeder: it turns the
+// MenuSpec/ApiSpec values a third-party application asks for into rows
+// across the four tables a visible, working menu entry needs - sys_api,
+// sys_menu, sys_menu_api_rule, and sys_role_menu/casbin_rule - following the
+// same shape cmd/migrate/migration/version/1786700001000_demo_menu.go
+// already hand-writes for the host's own demo module.
+//
+// See go-admin-core's docs/contract.md, "Application-supplied menu and API
+// entries", for the requirements this satisfies, and the security note on
+// seed.Seeder for what this boundary does and does not protect against: an
+// application already holds the same *gorm.DB this receives and could write
+// sys_menu/sys_api/casbin_rule directly, bypassing this entirely.
+type adminSeeder struct{}
+
+func init() {
+	seed.RegisterSeeder(adminSeeder{})
+}
+
+// adminRoleKey is the role every seeded menu is granted to. This mirrors
+// 1786700001000_demo_menu.go's own convention rather than inventing a
+// second one: MenuSpec carries no "which roles should see this" field for a
+// Seeder to consult instead, and admin is the one role guaranteed to exist
+// once the framework's own seed data has run.
+const adminRoleKey = "admin"
+
+// menuSortRange is what sys_menu.sort's column type actually holds.
+//
+// sort is `gorm:"size:4"`, which MySQL builds as a tinyint (-128..127);
+// sqlite ignores the width and accepts anything, so this only ever surfaces
+// on a real install, mid-migration, as Error 1264 - by which point the
+// migration has already run other, non-transactional DDL that will not be
+// retried. tools/checksilent's menu-sort-overflow check catches this for
+// every MenuSpec-shaped literal committed to this repository, but it walks
+// the repository's own source tree: a third-party application living in the
+// module cache is invisible to it. This is the equivalent check for that
+// application, run when its migration actually calls SeedMenus rather than
+// never.
+const (
+	menuSortMin = -128
+	menuSortMax = 127
+)
+
+func (adminSeeder) SeedMenus(tx *gorm.DB, appCode string, menus []seed.MenuSpec, apis []seed.ApiSpec) error {
+	apiRows, err := seedApis(tx, appCode, apis)
+	if err != nil {
+		return fmt.Errorf("seed: app %q: apis: %w", appCode, err)
+	}
+
+	menuIDs, err := seedMenuTree(tx, appCode, menus, apiRows)
+	if err != nil {
+		return fmt.Errorf("seed: app %q: menus: %w", appCode, err)
+	}
+
+	// Not `len(menuIDs) == 0`: grantToAdminRole grants two independent
+	// things, and an application is free to register apis without menus -
+	// endpoints another service calls, or a UI mounted somewhere else.
+	// Skipping the whole call on an empty menu list wrote the sys_api rows
+	// and then no casbin rule for them, so those endpoints were denied to
+	// everyone, admin included, with a migration that reported success.
+	if len(menuIDs) == 0 && len(apiRows) == 0 {
+		return nil
+	}
+	return grantToAdminRole(tx, menuIDs, apiRows)
+}
+
+// seedApis writes one sys_api row per ApiSpec and returns them keyed by
+// ApiSpec.Code, so seedMenuTree can resolve a MenuSpec's ApiCodes into the
+// rows sys_menu_api_rule needs to reference.
+//
+// sys_api.id is left to autoincrement rather than assigned by the caller,
+// unlike 1786700001000_demo_menu.go's hand-picked ids: that migration is
+// the one file tools/checksilent's menu-id-collision check can see, because
+// it lives in this repository; nothing plays that role for a third-party
+// application's ids in the module cache. Never accepting a caller-chosen id
+// here removes the collision this Seeder has no way to detect instead of
+// trying to detect it after the fact.
+func seedApis(tx *gorm.DB, appCode string, apis []seed.ApiSpec) (map[string]models.SysApi, error) {
+	seen := make(map[string]bool, len(apis))
+	rows := make(map[string]models.SysApi, len(apis))
+	for _, a := range apis {
+		if a.Code == "" {
+			return nil, errors.New("ApiSpec.Code must not be empty")
+		}
+		if seen[a.Code] {
+			return nil, fmt.Errorf("duplicate ApiSpec.Code %q", a.Code)
+		}
+		seen[a.Code] = true
+
+		row := models.SysApi{
+			Handle:  a.Handle,
+			Title:   a.Title,
+			Path:    a.Path,
+			Action:  a.Method,
+			Type:    "SYS",
+			AppCode: appCode,
+		}
+		if err := tx.Create(&row).Error; err != nil {
+			return nil, fmt.Errorf("api %q: %w", a.Code, err)
+		}
+		rows[a.Code] = row
+	}
+	return rows, nil
+}
+
+// seedMenuTree writes one sys_menu row per MenuSpec, resolving Parent/Code
+// references into parent_id/paths, and returns every menu id created so the
+// caller can grant them to a role.
+//
+// Specs do not have to be given in parent-before-child order: this makes
+// repeated passes over the remaining specs, creating whichever ones have
+// their Parent (if any) already created, until every spec is placed. A
+// spec whose Parent never resolves - naming a Code missing from this call,
+// or only reachable through a cycle - stops making progress and is reported
+// rather than looping forever.
+func seedMenuTree(tx *gorm.DB, appCode string, specs []seed.MenuSpec, apiRows map[string]models.SysApi) ([]int, error) {
+	byCode := make(map[string]seed.MenuSpec, len(specs))
+	for _, s := range specs {
+		if s.Code == "" {
+			return nil, errors.New("MenuSpec.Code must not be empty")
+		}
+		if _, dup := byCode[s.Code]; dup {
+			return nil, fmt.Errorf("duplicate MenuSpec.Code %q", s.Code)
+		}
+		if err := validateMenuSpec(s); err != nil {
+			return nil, fmt.Errorf("%q: %w", s.Code, err)
+		}
+		byCode[s.Code] = s
+	}
+
+	created := make(map[string]models.SysMenu, len(specs))
+	ids := make([]int, 0, len(specs))
+
+	for len(created) < len(specs) {
+		progressed := false
+		for _, s := range specs {
+			if _, done := created[s.Code]; done {
+				continue
+			}
+
+			var parentRow models.SysMenu
+			if s.Parent != "" {
+				parent, ok := created[s.Parent]
+				if !ok {
+					if _, exists := byCode[s.Parent]; !exists {
+						return nil, fmt.Errorf("%q: Parent %q is not a Code in this call", s.Code, s.Parent)
+					}
+					continue // s.Parent exists but has not been created yet; retry next pass
+				}
+				parentRow = parent
+			}
+
+			row := models.SysMenu{
+				MenuName:   menuName(appCode, s.Code),
+				Title:      s.Title,
+				Icon:       s.Icon,
+				Path:       s.Path,
+				MenuType:   s.Kind,
+				Permission: s.Permission,
+				ParentId:   parentRow.MenuId,
+				Component:  s.Component,
+				Sort:       s.Sort,
+				// Visible "0" is shown, not hidden - the same defaults
+				// 1786700001000_demo_menu.go seeds its own menu with. A
+				// freshly installed application's menu should not need an
+				// administrator to first find and unhide it.
+				Visible: "0",
+				IsFrame: "1",
+				AppCode: appCode,
+			}
+			for _, code := range s.ApiCodes {
+				api, ok := apiRows[code]
+				if !ok {
+					return nil, fmt.Errorf("%q: ApiCodes references %q, which is not an ApiSpec.Code in this call", s.Code, code)
+				}
+				// The full row, not just {Id: api.Id}: gorm's many2many
+				// association save upserts an associated row whose primary
+				// key is already set, so a stub carrying only Id would
+				// overwrite every other column of an sys_api row this same
+				// call just wrote with zero values.
+				row.SysApi = append(row.SysApi, api)
+			}
+
+			if err := tx.Create(&row).Error; err != nil {
+				return nil, fmt.Errorf("%q: %w", s.Code, err)
+			}
+
+			// paths is a materialized path from the root ("/0"), built from
+			// ids that only exist once the row above is created - the same
+			// two-step create-then-update 1786700001000_demo_menu.go's
+			// hand-assigned ids let it do in one literal, sequenced here
+			// instead.
+			if s.Parent == "" {
+				row.Paths = "/0/" + strconv.Itoa(row.MenuId)
+			} else {
+				row.Paths = parentRow.Paths + "/" + strconv.Itoa(row.MenuId)
+			}
+			if err := tx.Model(&models.SysMenu{}).Where("menu_id = ?", row.MenuId).
+				Update("paths", row.Paths).Error; err != nil {
+				return nil, fmt.Errorf("%q: writing paths: %w", s.Code, err)
+			}
+
+			created[s.Code] = row
+			ids = append(ids, row.MenuId)
+			progressed = true
+		}
+		if !progressed {
+			return nil, fmt.Errorf("unresolved Parent reference(s) among %d remaining spec(s); check for a cycle", len(specs)-len(created))
+		}
+	}
+	return ids, nil
+}
+
+// validateMenuSpec rejects the malformed input tools/checksilent's
+// menu-sort-overflow and Kind-adjacent checks would catch for an in-tree
+// seed but cannot for a third-party application's - see menuSortRange's doc
+// comment.
+func validateMenuSpec(s seed.MenuSpec) error {
+	switch s.Kind {
+	case contractmodels.Directory, contractmodels.Menu, contractmodels.Button:
+	default:
+		return fmt.Errorf("Kind %q is not one of Directory/Menu/Button", s.Kind)
+	}
+	if s.Sort < menuSortMin || s.Sort > menuSortMax {
+		return fmt.Errorf("Sort %d does not fit sys_menu.sort's tinyint column (%d..%d)", s.Sort, menuSortMin, menuSortMax)
+	}
+	return nil
+}
+
+// menuName synthesizes sys_menu.menu_name from appCode and the spec's Code,
+// since MenuSpec carries no field of its own for it - contract/seed's
+// package doc says a MenuSpec is what rendering a menu and checking a
+// button permission need, not a mirror of sys_menu's columns.
+//
+// PascalCasing both and concatenating them, rather than using Code alone,
+// is what keeps two applications that both picked the plain word "list" as
+// a Code from producing the identical menu_name: the frontend's keep-alive
+// cache matches a route by this exact string, not by (appCode, Code), so a
+// collision there is a UI bug, not a database error, and nothing else here
+// would ever surface it.
+func menuName(appCode, code string) string {
+	return pascalCase(appCode) + pascalCase(code)
+}
+
+func pascalCase(s string) string {
+	var b strings.Builder
+	for _, part := range strings.FieldsFunc(s, func(r rune) bool { return r == '-' || r == '_' }) {
+		b.WriteString(strings.ToUpper(part[:1]))
+		b.WriteString(part[1:])
+	}
+	return b.String()
+}
+
+// grantToAdminRole is sys_role_menu and casbin_rule: the two tables
+// go-admin-core's contract.md requires alongside sys_menu/sys_api, without
+// which a seeded menu is invisible to every role and its apis are
+// authorized for no one.
+//
+// It follows 1786700001000_demo_menu.go's exact pattern, including
+// tolerating a missing admin role: a database that has not yet run the
+// framework's own seed data (config/db.sql, inside 1599190683659_tables.go)
+// has nothing to grant to yet, and namespacedKey's ordering guarantee - every
+// framework migration sorts before every app-prefixed one - means that
+// should not happen in practice, but failing this call over it would be
+// worse than a menu with no grant yet.
+func grantToAdminRole(tx *gorm.DB, menuIDs []int, apiRows map[string]models.SysApi) error {
+	var role models.SysRole
+	if err := tx.Where("role_key = ?", adminRoleKey).First(&role).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil
+		}
+		return err
+	}
+
+	for _, id := range menuIDs {
+		if err := tx.Exec(
+			"INSERT INTO sys_role_menu (role_id, menu_id) SELECT ?, ? WHERE NOT EXISTS (SELECT 1 FROM sys_role_menu WHERE role_id = ? AND menu_id = ?)",
+			role.RoleId, id, role.RoleId, id,
+		).Error; err != nil {
+			return err
+		}
+	}
+
+	for _, a := range apiRows {
+		if err := tx.Exec(
+			"INSERT INTO casbin_rule (ptype, v0, v1, v2, v3, v4, v5) SELECT 'p', ?, ?, ?, '', '', '' WHERE NOT EXISTS (SELECT 1 FROM casbin_rule WHERE ptype='p' AND v0=? AND v1=? AND v2=?)",
+			role.RoleKey, a.Path, a.Action, role.RoleKey, a.Path, a.Action,
+		).Error; err != nil {
+			return err
+		}
+	}
+	return nil
+}

app/admin/service/seed_test.go

@@ -0,0 +1,291 @@
+package service
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	contractmodels "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/seed"
+
+	"go-admin/app/admin/models"
+)
+
+// newSeedTestDB builds the tables adminSeeder.SeedMenus writes to. sys_menu,
+// sys_api, sys_role and sys_role_menu (GORM's own join table for
+// SysRole.SysMenu) come from AutoMigrate; casbin_rule does not have a GORM
+// model anywhere in this codebase - see 1786700001000_demo_menu.go's own
+// comment on why models.CasbinRule (-> sys_casbin_rule) is the wrong table -
+// so it is created directly, matching the columns grantToAdminRole's INSERT
+// addresses.
+func newSeedTestDB(t *testing.T) *gorm.DB {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("open: %v", err)
+	}
+	if err := db.AutoMigrate(&models.SysMenu{}, &models.SysApi{}, &models.SysRole{}); err != nil {
+		t.Fatalf("automigrate: %v", err)
+	}
+	if err := db.Exec(`CREATE TABLE casbin_rule (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		ptype TEXT, v0 TEXT, v1 TEXT, v2 TEXT, v3 TEXT, v4 TEXT, v5 TEXT
+	)`).Error; err != nil {
+		t.Fatalf("create casbin_rule: %v", err)
+	}
+	return db
+}
+
+func seedAdminRole(t *testing.T, db *gorm.DB) models.SysRole {
+	t.Helper()
+	role := models.SysRole{RoleName: "Administrator", RoleKey: adminRoleKey}
+	if err := db.Create(&role).Error; err != nil {
+		t.Fatalf("seed admin role: %v", err)
+	}
+	return role
+}
+
+// This is the acceptance case go-admin-core's docs/contract.md requires: one
+// SeedMenus call populates all four tables a visible, working menu entry
+// needs, every row tagged with the appCode it was called with, and the
+// parent/child tree resolved into sys_menu's parent_id/paths.
+func TestSeedMenusPopulatesAllFourTables(t *testing.T) {
+	db := newSeedTestDB(t)
+	seedAdminRole(t, db)
+
+	menus := []seed.MenuSpec{
+		{Code: "dir", Kind: contractmodels.Directory, Title: "Order Example", Path: "/apps/order", Component: "Layout", Sort: 10},
+		{Code: "list", Parent: "dir", Kind: contractmodels.Menu, Title: "Orders", Path: "list", Component: "apps/order/order/index", Sort: 1, ApiCodes: []string{"list"}},
+		{Code: "btn-create", Parent: "list", Kind: contractmodels.Button, Title: "Create", Permission: "order:order:create", Sort: 1},
+	}
+	apis := []seed.ApiSpec{
+		{Code: "list", Title: "Order list", Path: "/api/v1/order", Method: "GET", Handle: "apis.Order.GetPage-fm"},
+	}
+
+	err := db.Transaction(func(tx *gorm.DB) error {
+		return adminSeeder{}.SeedMenus(tx, "order", menus, apis)
+	})
+	if err != nil {
+		t.Fatalf("SeedMenus: %v", err)
+	}
+
+	var apiRows []models.SysApi
+	if err := db.Find(&apiRows).Error; err != nil {
+		t.Fatal(err)
+	}
+	if len(apiRows) != 1 || apiRows[0].AppCode != "order" || apiRows[0].Path != "/api/v1/order" {
+		t.Fatalf("sys_api = %+v", apiRows)
+	}
+
+	var menuRows []models.SysMenu
+	if err := db.Order("sort").Find(&menuRows).Error; err != nil {
+		t.Fatal(err)
+	}
+	if len(menuRows) != 3 {
+		t.Fatalf("sys_menu has %d rows, want 3: %+v", len(menuRows), menuRows)
+	}
+	byName := map[string]models.SysMenu{}
+	for _, m := range menuRows {
+		if m.AppCode != "order" {
+			t.Errorf("menu %q app_code = %q, want order", m.MenuName, m.AppCode)
+		}
+		byName[m.MenuName] = m
+	}
+	dir, ok := byName[menuName("order", "dir")]
+	if !ok || dir.ParentId != 0 || dir.Paths != "/0/"+strconv.Itoa(dir.MenuId) {
+		t.Fatalf("dir menu = %+v", dir)
+	}
+	list, ok := byName[menuName("order", "list")]
+	if !ok || list.ParentId != dir.MenuId || list.Paths != dir.Paths+"/"+strconv.Itoa(list.MenuId) {
+		t.Fatalf("list menu = %+v (dir=%+v)", list, dir)
+	}
+	btn, ok := byName[menuName("order", "btn-create")]
+	if !ok || btn.ParentId != list.MenuId {
+		t.Fatalf("btn menu = %+v (list=%+v)", btn, list)
+	}
+
+	// sys_menu_api_rule: gorm's own many2many join table for SysMenu.SysApi.
+	var joinCount int64
+	if err := db.Table("sys_menu_api_rule").
+		Where("sys_menu_menu_id = ? AND sys_api_id = ?", list.MenuId, apiRows[0].Id).
+		Count(&joinCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if joinCount != 1 {
+		t.Errorf("sys_menu_api_rule has %d row(s) linking list to its api, want 1", joinCount)
+	}
+
+	// sys_role_menu: every seeded menu granted to the admin role.
+	var roleMenuCount int64
+	if err := db.Table("sys_role_menu").Count(&roleMenuCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if roleMenuCount != 3 {
+		t.Errorf("sys_role_menu has %d row(s), want 3 (one per seeded menu)", roleMenuCount)
+	}
+
+	// casbin_rule: the api's path/method granted to the admin role.
+	var casbinCount int64
+	if err := db.Table("casbin_rule").
+		Where("ptype = 'p' AND v0 = ? AND v1 = ? AND v2 = ?", adminRoleKey, "/api/v1/order", "GET").
+		Count(&casbinCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if casbinCount != 1 {
+		t.Errorf("casbin_rule has %d matching row(s), want 1", casbinCount)
+	}
+}
+
+// A database that has not run the framework's own seed data yet (no admin
+// role) must not fail SeedMenus - 1786700001000_demo_menu.go tolerates
+// exactly the same condition for the host's own demo module.
+func TestSeedMenusToleratesMissingAdminRole(t *testing.T) {
+	db := newSeedTestDB(t)
+
+	err := db.Transaction(func(tx *gorm.DB) error {
+		return adminSeeder{}.SeedMenus(tx, "order", []seed.MenuSpec{
+			{Code: "dir", Kind: contractmodels.Directory, Title: "Order"},
+		}, nil)
+	})
+	if err != nil {
+		t.Fatalf("SeedMenus: %v", err)
+	}
+
+	var roleMenuCount int64
+	if err := db.Table("sys_role_menu").Count(&roleMenuCount).Error; err != nil {
+		t.Fatal(err)
+	}
+	if roleMenuCount != 0 {
+		t.Errorf("sys_role_menu has %d row(s) with no role to grant to", roleMenuCount)
+	}
+}
+
+func TestSeedMenusRejectsMalformedSpecs(t *testing.T) {
+	cases := []struct {
+		name  string
+		menus []seed.MenuSpec
+		apis  []seed.ApiSpec
+		want  string
+	}{
+		{
+			name:  "duplicate menu code",
+			menus: []seed.MenuSpec{{Code: "a", Kind: contractmodels.Directory}, {Code: "a", Kind: contractmodels.Directory}},
+			want:  `duplicate MenuSpec.Code "a"`,
+		},
+		{
+			name:  "unresolved parent",
+			menus: []seed.MenuSpec{{Code: "a", Parent: "missing", Kind: contractmodels.Menu}},
+			want:  `Parent "missing" is not a Code in this call`,
+		},
+		{
+			name:  "unresolved api code",
+			menus: []seed.MenuSpec{{Code: "a", Kind: contractmodels.Menu, ApiCodes: []string{"missing"}}},
+			want:  `ApiCodes references "missing"`,
+		},
+		{
+			name:  "unknown kind",
+			menus: []seed.MenuSpec{{Code: "a", Kind: "X"}},
+			want:  `Kind "X" is not one of Directory/Menu/Button`,
+		},
+		{
+			name:  "sort overflows a tinyint",
+			menus: []seed.MenuSpec{{Code: "a", Kind: contractmodels.Directory, Sort: 900}},
+			want:  `Sort 900 does not fit sys_menu.sort's tinyint column`,
+		},
+		{
+			name: "duplicate api code",
+			apis: []seed.ApiSpec{{Code: "x"}, {Code: "x"}},
+			want: `duplicate ApiSpec.Code "x"`,
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			db := newSeedTestDB(t)
+			err := db.Transaction(func(tx *gorm.DB) error {
+				return adminSeeder{}.SeedMenus(tx, "order", tc.menus, tc.apis)
+			})
+			if err == nil || !strings.Contains(err.Error(), tc.want) {
+				t.Fatalf("err = %v, want it to contain %q", err, tc.want)
+			}
+		})
+	}
+}
+
+// TestSeederIsRegistered pins the registration itself, not the behaviour.
+//
+// Every other test here calls adminSeeder{}.SeedMenus directly, which proves
+// the implementation is right and proves nothing about whether anything ever
+// reaches it: delete the RegisterSeeder call in init() and they all stay
+// green, while a real migrate fails with ErrNoSeeder and no menu is written.
+// Going through the package-level SeedMenus is what closes that gap - it is
+// the door an application actually knocks on.
+func TestSeederIsRegistered(t *testing.T) {
+	db := newSeedTestDB(t)
+	err := db.Transaction(func(tx *gorm.DB) error {
+		return seed.SeedMenus(tx, "probe", []seed.MenuSpec{{
+			Code: "root", Kind: contractmodels.Directory, Title: "Probe", Sort: 1,
+		}}, nil)
+	})
+	if errors.Is(err, seed.ErrNoSeeder) {
+		t.Fatal("no Seeder is registered: an application's SeedMenus would write no menu at all")
+	}
+	if err != nil {
+		t.Fatalf("SeedMenus through the package-level entry point: %v", err)
+	}
+}
+
+// An application is free to register apis with no menus at all - endpoints
+// another service calls, or a UI mounted somewhere else. Skipping
+// grantToAdminRole on an empty menu list wrote the sys_api rows and then no
+// casbin rule for them, so every one of those endpoints was denied to
+// everyone including admin, from a migration that reported success.
+func TestSeedMenusGrantsApisWhenThereAreNoMenus(t *testing.T) {
+	db := newSeedTestDB(t)
+	role := seedAdminRole(t, db)
+
+	apis := []seed.ApiSpec{
+		{Code: "hook", Title: "Inbound hook", Path: "/api/v1/hook", Method: "POST", Handle: "hook.Receive"},
+		{Code: "sync", Title: "Sync", Path: "/api/v1/sync", Method: "GET", Handle: "hook.Sync"},
+	}
+	if err := (adminSeeder{}).SeedMenus(db, "hooks", nil, apis); err != nil {
+		t.Fatalf("SeedMenus: %v", err)
+	}
+
+	var apiCount int64
+	db.Model(&models.SysApi{}).Where("app_code = ?", "hooks").Count(&apiCount)
+	if apiCount != int64(len(apis)) {
+		t.Fatalf("sys_api rows = %d, want %d", apiCount, len(apis))
+	}
+
+	for _, a := range apis {
+		var n int64
+		db.Table("casbin_rule").
+			Where("ptype = 'p' AND v0 = ? AND v1 = ? AND v2 = ?", role.RoleKey, a.Path, a.Method).
+			Count(&n)
+		if n != 1 {
+			t.Errorf("casbin_rule for %s %s = %d rows, want 1: the endpoint is denied to admin", a.Method, a.Path, n)
+		}
+	}
+}
+
+// The other half of the same guard: nothing registered at all must stay a
+// no-op rather than start touching sys_role_menu or casbin_rule.
+func TestSeedMenusWithNothingRegisteredWritesNothing(t *testing.T) {
+	db := newSeedTestDB(t)
+	seedAdminRole(t, db)
+
+	if err := (adminSeeder{}).SeedMenus(db, "empty", nil, nil); err != nil {
+		t.Fatalf("SeedMenus: %v", err)
+	}
+	for _, table := range []string{"casbin_rule", "sys_role_menu"} {
+		var n int64
+		db.Table(table).Count(&n)
+		if n != 0 {
+			t.Errorf("%s has %d rows, want 0", table, n)
+		}
+	}
+}

app/admin/service/sys_user.go

@@ -38,6 +38,30 @@ func (e *SysUser) GetPage(c *dto.SysUserGetPageReq, p *actions.DataPermission, l
 	return nil
 }
 
+// GetSelf 获取调用者自己的 SysUser 对象，不套数据权限
+//
+// The data scope answers "whose rows may this user see"; the caller here is
+// reading their own, and the id comes from the token, so there is nothing left
+// for a scope to restrict. Applying one is not a stricter version of this
+// query - it is a broken one. DataScopeSelf matches on create_by, and a user
+// account is created by whoever added it, so a scoped self-read would fail for
+// every user who did not create their own account.
+//
+// GetProfile has always read the same row this way, with no scope at all.
+func (e *SysUser) GetSelf(d *dto.SysUserById, model *models.SysUser) error {
+	err := e.Orm.First(model, d.GetId()).Error
+	if err != nil && errors.Is(err, gorm.ErrRecordNotFound) {
+		err = errors.New("查看对象不存在或无权查看")
+		e.Log.Errorf("db error: %s", err)
+		return err
+	}
+	if err != nil {
+		e.Log.Errorf("db error: %s", err)
+		return err
+	}
+	return nil
+}
+
 // Get 获取SysUser对象
 func (e *SysUser) Get(d *dto.SysUserById, p *actions.DataPermission, model *models.SysUser) error {
 	var data models.SysUser

app/demo/router/router.go

@@ -33,11 +33,9 @@ func InitRouter() {
 		os.Exit(-1)
 	}
 
-	// the jwt middleware
-	authMiddleware, err := common.AuthInit()
-	if err != nil {
-		log.Fatalf("JWT Init Error, %s", err.Error())
-	}
+	// the jwt middleware: shared instance InitMiddleware built at startup,
+	// not one built here per module (see common/middleware.GetAuthMiddleware).
+	authMiddleware := common.GetAuthMiddleware()
 
 	// 注册业务路由
 	InitBusinessRouter(r, authMiddleware)

app/jobs/jobbase.go

@@ -1,6 +1,7 @@
 package jobs
 
 import (
+	"context"
 	"fmt"
 	log "github.com/go-admin-team/go-admin-core/v2/logger"
 	"github.com/go-admin-team/go-admin-core/v2/sdk"
@@ -145,11 +146,36 @@ func setup(key string, db *gorm.DB) {
 	}
 
 	// 其中任务
-	crontab.Start()
+	startCrontab(crontab)
+}
+
+// startCrontab starts c and arranges for it to be stopped on the way out.
+//
+// The stop used to be `defer crontab.Stop()` followed by `select {}`. The
+// select never returned, so the defer never ran and the scheduler was never
+// stopped; and because setup never returned, the loop in Setup never reached
+// the second tenant - only whichever database came first out of the map ever
+// got a scheduler at all. cron.Start is itself `go c.run()`, so the select was
+// blocking for nothing.
+//
+// cron.Stop returns a context that closes once the jobs already running have
+// finished. That is the wait the shutdown budget exists to bound: giving up on
+// it leaves those jobs running until the process exits, which is better than
+// holding the whole shutdown open for one job that will not end.
+func startCrontab(c *cron.Cron) {
+	c.Start()
 	fmt.Println(time.Now().Format(timeFormat), " [INFO] JobCore start success.")
+
 	// 关闭任务
-	defer crontab.Stop()
-	select {}
+	sdk.Runtime.SetShutdown(func(ctx context.Context) {
+		stopped := c.Stop()
+		select {
+		case <-stopped.Done():
+			fmt.Println(time.Now().Format(timeFormat), " [INFO] JobCore stopped.")
+		case <-ctx.Done():
+			fmt.Println(time.Now().Format(timeFormat), " [WARN] JobCore stop gave up waiting for running jobs")
+		}
+	})
 }
 
 // AddJob 添加任务 AddJob(invokeTarget string, jobId int, jobName string, cronExpression string)

app/jobs/jobbase_test.go

@@ -0,0 +1,52 @@
+package jobs
+
+import (
+	"context"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/pkg/cronjob"
+)
+
+// The scheduler had never been stopped. `defer crontab.Stop()` sat directly
+// above a `select {}` that never returned, so the deferred call was
+// unreachable for the life of the process.
+//
+// There is one test rather than several because BeforeExit closes to further
+// registration once it has run: a second RunShutdown in this binary would find
+// an empty registry and pass while proving nothing.
+func TestTheSchedulerIsStoppedOnTheWayOut(t *testing.T) {
+	var ticks atomic.Int64
+
+	c := cronjob.NewWithSeconds()
+	if _, err := c.AddFunc("* * * * * *", func() { ticks.Add(1) }); err != nil {
+		t.Fatalf("AddFunc: %v", err)
+	}
+
+	startCrontab(c)
+
+	// It has to be running before stopping it can mean anything.
+	deadline := time.Now().Add(5 * time.Second)
+	for ticks.Load() == 0 && time.Now().Before(deadline) {
+		time.Sleep(20 * time.Millisecond)
+	}
+	if ticks.Load() == 0 {
+		t.Fatal("the scheduler never ran the job, so this test cannot show it was stopped")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+	if err := sdk.Runtime.RunShutdown(ctx); err != nil {
+		t.Fatalf("RunShutdown: %v", err)
+	}
+
+	// Two and a half seconds is two more firings of a job that runs every
+	// second, so silence here is the assertion.
+	at := ticks.Load()
+	time.Sleep(2500 * time.Millisecond)
+	if n := ticks.Load() - at; n > 0 {
+		t.Errorf("the job fired %d more times after shutdown: the scheduler is still running", n)
+	}
+}

app/jobs/router/init_router.go

@@ -26,10 +26,9 @@ func InitRouter() {
 		os.Exit(-1)
 	}
 
-	authMiddleware, err := common.AuthInit()
-	if err != nil {
-		log.Fatalf("JWT Init Error, %s", err.Error())
-	}
+	// the jwt middleware: shared instance InitMiddleware built at startup,
+	// not one built here per module (see common/middleware.GetAuthMiddleware).
+	authMiddleware := common.GetAuthMiddleware()
 
 	// 注册业务路由
 	initRouter(r, authMiddleware)

app/other/router/init_router.go

@@ -25,10 +25,9 @@ func InitRouter() {
 		os.Exit(-1)
 	}
 	// the jwt middleware
-	authMiddleware, err := common.AuthInit()
-	if err != nil {
-		log.Fatalf("JWT Init Error, %s", err.Error())
-	}
+	// the jwt middleware: shared instance InitMiddleware built at startup,
+	// not one built here per module (see common/middleware.GetAuthMiddleware).
+	authMiddleware := common.GetAuthMiddleware()
 
 	// 注册业务路由
 	// TODO: 这里可存放业务路由，里边并无实际路由只有演示代码

app/other/router/monitor.go

@@ -1,23 +1,82 @@
 package router
 
 import (
+	"context"
 	"net/http"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/go-admin-team/go-admin-core/v2/tools/transfer"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
+
+	"go-admin/common/health"
 )
 
 func init() {
-	routerNoCheckRole = append(routerNoCheckRole, registerMonitorRouter)
+	routerNoCheckRole = append(routerNoCheckRole, RegisterMonitorRouter)
 }
 
-// 需认证的路由代码
-func registerMonitorRouter(v1 *gin.RouterGroup) {
+// readyTimeout bounds the whole probe. What constrains it is the orchestrator's
+// per-check timeout rather than its polling period: Kubernetes allows a probe
+// one second by default, so a dependency that answers in 1.2s is recorded as a
+// failed check however promptly this handler returns. A manifest that mounts
+// this probe has to raise timeoutSeconds above this value, and
+// scripts/k8s/deploy.yml does.
+const readyTimeout = 2 * time.Second
+
+// HealthPath and ReadyPath are the two probe routes, relative to APIPrefix.
+//
+// Exported for the same reason as the prefix: the rate limiter has to be told
+// to skip them, and it is installed in a package that cannot import this one.
+const (
+	HealthPath = "/health"
+	ReadyPath  = "/ready"
+)
+
+// RegisterMonitorRouter mounts the metrics endpoint and the two probes on v1.
+//
+// Exported so that a test can put the real probes on a server of its own. The
+// alternative - a test that re-implements the handler it means to check - is
+// how a probe comes to be asserted against a copy of itself.
+//
+// 无需认证的路由代码
+func RegisterMonitorRouter(v1 *gin.RouterGroup) {
 	v1.GET("/metrics", transfer.Handler(promhttp.Handler()))
-	//健康检查
-	v1.GET("/health", func(c *gin.Context) {
+
+	// 健康检查（存活）
+	//
+	// Stays a bare 200 on purpose. This is the answer to "should I restart
+	// you", and a process whose database is unreachable does not want
+	// restarting - that turns one outage into a crash loop and throws away the
+	// connection pool, the cache and every in-flight request along the way.
+	v1.GET(HealthPath, func(c *gin.Context) {
 		c.Status(http.StatusOK)
 	})
 
-}
+	// 就绪检查
+	//
+	// The answer to "should I send you requests". It fails while a dependency
+	// is unreachable, and from the moment shutdown begins - for as long as
+	// extend.shutdown.drain says, which is zero unless it is configured. The
+	// package comment in common/health says what that window is worth, and to
+	// whom.
+	v1.GET(ReadyPath, func(c *gin.Context) {
+		if health.Draining() {
+			c.JSON(http.StatusServiceUnavailable, gin.H{
+				"status": "draining",
+				"checks": []health.Check{},
+			})
+			return
+		}
+		ctx, cancel := context.WithTimeout(c.Request.Context(), readyTimeout)
+		defer cancel()
+
+		checks := health.Ready(ctx)
+		status := http.StatusOK
+		if !health.Healthy(checks) {
+			status = http.StatusServiceUnavailable
+		}
+		c.JSON(status, gin.H{"status": http.StatusText(status), "checks": checks})
+	})
+
+}

app/other/router/router.go

@@ -10,6 +10,13 @@ var (
 	routerCheckRole   = make([]func(v1 *gin.RouterGroup, authMiddleware *jwt.GinJWTMiddleware), 0)
 )
 
+// APIPrefix is the group every route below is registered under.
+//
+// Exported because the middleware chain in cmd/api has to name two of those
+// routes in full - the rate limiter is installed on the engine and must skip
+// the probes - and a prefix spelled in two places is a prefix that drifts.
+const APIPrefix = "/api/v1"
+
 // initRouter 路由示例
 func initRouter(r *gin.Engine, authMiddleware *jwt.GinJWTMiddleware) *gin.Engine {
 
@@ -24,7 +31,7 @@ func initRouter(r *gin.Engine, authMiddleware *jwt.GinJWTMiddleware) *gin.Engine
 // noCheckRoleRouter 无需认证的路由示例
 func noCheckRoleRouter(r *gin.Engine) {
 	// 可根据业务需求来设置接口版本
-	v1 := r.Group("/api/v1")
+	v1 := r.Group(APIPrefix)
 
 	for _, f := range routerNoCheckRole {
 		f(v1)
@@ -34,7 +41,7 @@ func noCheckRoleRouter(r *gin.Engine) {
 // checkRoleRouter 需要认证的路由示例
 func checkRoleRouter(r *gin.Engine, authMiddleware *jwt.GinJWTMiddleware) {
 	// 可根据业务需求来设置接口版本
-	v1 := r.Group("/api/v1")
+	v1 := r.Group(APIPrefix)
 
 	for _, f := range routerCheckRole {
 		f(v1, authMiddleware)

cmd/api/phase_test.go

@@ -0,0 +1,160 @@
+package api
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+)
+
+// freePort returns a port nothing is listening on. It is inherently a guess -
+// the port is free when it is handed back and could be taken a moment later -
+// but every alternative needs the caller to hold the listener, which is the one
+// thing these tests cannot do.
+func freePort(t *testing.T) int {
+	t.Helper()
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("probe listen: %v", err)
+	}
+	port := ln.Addr().(*net.TCPAddr).Port
+	_ = ln.Close()
+	return port
+}
+
+// AfterListen promises a hook that the port is reachable. Both halves of that
+// are asserted here, and in one test rather than two, because the phase seals
+// itself once it has run: a second test calling RunPhase again would find a
+// closed registry and pass while proving nothing.
+//
+// The failing bind comes first for the same reason. It must leave the phase
+// unsealed, which is only visible if nothing has sealed it yet.
+func TestAfterListenIsAnnouncedOnlyOnceThePortIsBound(t *testing.T) {
+	// The pause makes the "announced synchronously" claim testable: if the
+	// announcement were moved onto a goroutine, startServing would return
+	// while the hook was still sleeping and the count below would be zero.
+	var ran int
+	sdk.Runtime.SetPhase(runtime.AfterListen, func() {
+		time.Sleep(50 * time.Millisecond)
+		ran++
+	})
+
+	// Somebody else already has the port. Under ListenAndServe this surfaced
+	// on the serving goroutine, far too late to stop the announcement.
+	taken, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("occupy: %v", err)
+	}
+	defer func() { _ = taken.Close() }()
+
+	blocked := &http.Server{Addr: taken.Addr().String(), Handler: http.NewServeMux()}
+	if err := startServing(blocked, false, "", ""); err == nil {
+		t.Fatal("startServing returned no error for a port that was already taken")
+	}
+	if ran != 0 {
+		t.Errorf("AfterListen ran %d times after a failed bind; a hook there is told the port is reachable", ran)
+	}
+	if sdk.Runtime.PhaseSealed(runtime.AfterListen) {
+		t.Error("a failed bind sealed AfterListen, so the phase could never run for a server that did start")
+	}
+
+	// A certificate that cannot be read is the other way to fail before there
+	// is anything to announce. ServeTLS reads it on the serving goroutine, so
+	// without the check in startServing this would be a hook told the port was
+	// reachable while the server was already on its way down.
+	if err := startServing(&http.Server{Addr: "127.0.0.1:0"}, true, "no-such.pem", "no-such.key"); err == nil {
+		t.Fatal("startServing returned no error for a certificate that does not exist")
+	}
+	if ran != 0 {
+		t.Errorf("AfterListen ran %d times after a certificate failure", ran)
+	}
+	if sdk.Runtime.PhaseSealed(runtime.AfterListen) {
+		t.Error("a certificate failure sealed AfterListen")
+	}
+
+	// And now a bind that works.
+	port := freePort(t)
+	srv := &http.Server{Addr: fmt.Sprintf("127.0.0.1:%d", port), Handler: http.NewServeMux()}
+	if err := startServing(srv, false, "", ""); err != nil {
+		t.Fatalf("startServing on a free port: %v", err)
+	}
+	defer func() { _ = srv.Close() }()
+
+	// Checked the instant startServing returns, so this is also the assertion
+	// that it did not return early: an asynchronous announcement would still
+	// be inside the sleep. Synchrony matters because an announcement that
+	// overlaps the wait below could, on a fast SIGTERM, have the shutdown
+	// callbacks finish before the startup ones.
+	if ran != 1 {
+		t.Fatalf("AfterListen ran %d times, want 1", ran)
+	}
+
+	// The claim is not "Serve was called" but "the port answers". Dial it.
+	c, err := net.DialTimeout("tcp", srv.Addr, 5*time.Second)
+	if err != nil {
+		t.Fatalf("AfterListen ran but the port does not answer: %v", err)
+	}
+	_ = c.Close()
+}
+
+// BeforeRouter is the last point at which a module can still affect how routes
+// are built, so it has to run while there is no engine yet. The before registry
+// is a different moment despite the name: those callbacks run after initRouter
+// has built the engine.
+//
+// The two are two lines apart in buildRouter, and calling them equivalent is a
+// mistake this repository has already made in writing. Until this test the
+// ordering was checked by reading - which is how the stop signals came to be
+// armed after the readiness banner in the same file.
+func TestBeforeRouterRunsWhileThereIsNoEngine(t *testing.T) {
+	freshRuntime(t)
+
+	// AuthInit reads these two package-level values and nothing else. No
+	// database is involved in building a router: the handlers are registered,
+	// not called.
+	config.ApplicationConfig.Mode = "dev"
+	config.JwtConfig.Secret = "test-secret-for-the-router-build"
+
+	type observation struct {
+		ran        int
+		engineWas  interface{}
+		engineSeen bool
+	}
+	var phase, before observation
+
+	sdk.Runtime.SetPhase(runtime.BeforeRouter, func() {
+		phase.ran++
+		phase.engineWas = sdk.Runtime.GetEngine()
+		phase.engineSeen = true
+	})
+	sdk.Runtime.SetBefore(func() {
+		before.ran++
+		before.engineWas = sdk.Runtime.GetEngine()
+		before.engineSeen = true
+	})
+
+	buildRouter()
+
+	if phase.ran != 1 {
+		t.Fatalf("BeforeRouter ran %d times, want 1", phase.ran)
+	}
+	if !phase.engineSeen || phase.engineWas != nil {
+		t.Errorf("BeforeRouter saw engine %v, want nil: it is meant to run before initRouter builds one", phase.engineWas)
+	}
+
+	if before.ran != 1 {
+		t.Fatalf("the before registry ran %d times, want 1", before.ran)
+	}
+	if before.engineWas == nil {
+		t.Error("a before callback saw no engine; that registry is meant to run after initRouter, and describing it as equivalent to BeforeRouter is the error this asserts against")
+	}
+
+	if sdk.Runtime.GetEngine() == nil {
+		t.Error("buildRouter returned with no engine built")
+	}
+}

cmd/api/queue_test.go

@@ -0,0 +1,167 @@
+package api
+
+import (
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	corestorage "github.com/go-admin-team/go-admin-core/v2/storage"
+)
+
+// recordingQueue records what was done to it, in order. Register and Run are
+// the two calls whose order is the point of this file; Append and Shutdown are
+// here to satisfy the interface.
+type recordingQueue struct {
+	mu     sync.Mutex
+	events []string
+	ran    chan struct{}
+}
+
+func newRecordingQueue() *recordingQueue {
+	return &recordingQueue{ran: make(chan struct{}, 4)}
+}
+
+func (q *recordingQueue) record(e string) {
+	q.mu.Lock()
+	q.events = append(q.events, e)
+	q.mu.Unlock()
+}
+
+func (q *recordingQueue) seen() []string {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+	return append([]string(nil), q.events...)
+}
+
+func (q *recordingQueue) String() string                    { return "recording" }
+func (q *recordingQueue) Append(corestorage.Messager) error { return nil }
+func (q *recordingQueue) Register(name string, _ corestorage.ConsumerFunc) {
+	q.record("register:" + name)
+}
+func (q *recordingQueue) Shutdown() {}
+
+func (q *recordingQueue) Run() {
+	q.record("run")
+	select {
+	case q.ran <- struct{}{}:
+	default:
+	}
+}
+
+// waitForRun waits for Run, which is started on a goroutine.
+func (q *recordingQueue) waitForRun(t *testing.T) {
+	t.Helper()
+	select {
+	case <-q.ran:
+	case <-time.After(5 * time.Second):
+		t.Fatalf("Run was never called; saw: %v", q.seen())
+	}
+}
+
+// The consumers must be registered before the queue is started. A queue that
+// is already running refuses further registration - the contract
+// implementations answer storage.ErrQueueAlreadyStarted - and the legacy
+// adapter this path goes through drops that error, so the wrong order loses
+// consumers with nothing said about it. The memory backend does not care,
+// which is exactly why this cannot be left to be noticed in use.
+func TestConsumersAreRegisteredBeforeTheQueueIsStarted(t *testing.T) {
+	attachedQueue.Store(0)
+	t.Cleanup(func() { attachedQueue.Store(0) })
+
+	q := newRecordingQueue()
+	attachConsumersOnce(1, q)
+	q.waitForRun(t)
+
+	seen := q.seen()
+	runAt := -1
+	registers := 0
+	for i, e := range seen {
+		switch {
+		case e == "run":
+			if runAt < 0 {
+				runAt = i
+			}
+		case strings.HasPrefix(e, "register:"):
+			registers++
+			if runAt >= 0 {
+				t.Errorf("%q came after Run; a running queue refuses registration", e)
+			}
+		}
+	}
+	if registers != 3 {
+		t.Errorf("registered %d consumers, want 3; saw %v", registers, seen)
+	}
+	if runAt < 0 {
+		t.Errorf("the queue was never started; saw %v", seen)
+	}
+}
+
+// AfterResource runs again on every configuration reload, so the hook has to
+// be idempotent with respect to a given queue - not "does nothing the second
+// time". Registering twice on the same queue would give every message two
+// consumers and write every log row twice.
+func TestTheSameQueueIsNotGivenConsumersTwice(t *testing.T) {
+	attachedQueue.Store(0)
+	t.Cleanup(func() { attachedQueue.Store(0) })
+
+	q := newRecordingQueue()
+	attachConsumersOnce(1, q)
+	q.waitForRun(t)
+	attachConsumersOnce(1, q)
+
+	// Nothing to wait for on the second call, so give a wrong implementation
+	// the time it would need to show up.
+	time.Sleep(200 * time.Millisecond)
+	if n := len(q.seen()); n != 4 {
+		t.Errorf("%d calls after attaching twice to the same queue, want 4 (3 registers + 1 run); saw %v", n, q.seen())
+	}
+}
+
+// The other half of the same rule: a reload builds a new adapter, and the
+// consumers on the old one are attached to a queue nobody publishes to any
+// more. A new generation must get its own set.
+func TestANewQueueGetsItsOwnConsumers(t *testing.T) {
+	attachedQueue.Store(0)
+	t.Cleanup(func() { attachedQueue.Store(0) })
+
+	first := newRecordingQueue()
+	attachConsumersOnce(1, first)
+	first.waitForRun(t)
+
+	second := newRecordingQueue()
+	attachConsumersOnce(2, second)
+	second.waitForRun(t)
+
+	if n := len(second.seen()); n != 4 {
+		t.Errorf("the queue from the second generation saw %d calls, want 4; saw %v", n, second.seen())
+	}
+	if n := len(first.seen()); n != 4 {
+		t.Errorf("the queue from the first generation saw %d calls, want 4 - it should not have been touched again; saw %v", n, first.seen())
+	}
+}
+
+// Generation 0 means the configuration has no queue section at all, so nothing
+// was installed and the runtime hands back its own memory queue. That case
+// still has to get consumers - the registration it replaces was unconditional,
+// and dropping it would stop the login and operation logs for anyone who
+// commented the section out.
+func TestAnUnconfiguredQueueStillGetsConsumers(t *testing.T) {
+	attachedQueue.Store(0)
+	t.Cleanup(func() { attachedQueue.Store(0) })
+
+	q := newRecordingQueue()
+	attachConsumersOnce(0, q)
+	q.waitForRun(t)
+
+	if n := len(q.seen()); n != 4 {
+		t.Errorf("an unconfigured queue saw %d calls, want 4; saw %v", n, q.seen())
+	}
+
+	// And still only once.
+	attachConsumersOnce(0, q)
+	time.Sleep(200 * time.Millisecond)
+	if n := len(q.seen()); n != 4 {
+		t.Errorf("generation 0 was attached to twice: %d calls, want 4; saw %v", n, q.seen())
+	}
+}

cmd/api/server.go

@@ -2,10 +2,14 @@ package api
 
 import (
 	"context"
+	"crypto/tls"
 	"fmt"
+	"net"
 	"net/http"
 	"os"
 	"os/signal"
+	"sync/atomic"
+	"syscall"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -13,16 +17,21 @@ import (
 	log "github.com/go-admin-team/go-admin-core/v2/logger"
 	"github.com/go-admin-team/go-admin-core/v2/sdk"
 	"github.com/go-admin-team/go-admin-core/v2/sdk/api"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/bootstrap"
 	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
 	"github.com/go-admin-team/go-admin-core/v2/sdk/pkg"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+	corestorage "github.com/go-admin-team/go-admin-core/v2/storage"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"go-admin/app/admin/models"
 	"go-admin/app/admin/router"
 	"go-admin/app/jobs"
+	otherrouter "go-admin/app/other/router"
 	"go-admin/common/database"
 	"go-admin/common/global"
+	"go-admin/common/health"
 	common "go-admin/common/middleware"
 	"go-admin/common/middleware/handler"
 	"go-admin/common/storage"
@@ -59,44 +68,123 @@ func init() {
 func setup() {
 	// 注入配置扩展项
 	config.ExtendConfig = &ext.ExtConfig
+
+	// Registered before the configuration is read. SetupConfig announces
+	// AfterResource as soon as the callbacks that build the resources have
+	// run, so a hook added after that call would miss the first round and the
+	// queue would have no consumers until somebody edited the config file.
+	sdk.Runtime.SetPhase(runtime.AfterResource, attachQueueConsumers)
+
+	// On AfterListen rather than on a bare goroutine from run(). Two reasons:
+	// the phase runs behind core's panic guard, which does not reach across a
+	// goroutine boundary - a panic while loading jobs used to take the whole
+	// process down with a stack that named this file - and the jobs it starts
+	// can call the API, which is only true once the socket is accepting.
+	sdk.Runtime.SetPhase(runtime.AfterListen, startCronJobs)
+
 	//1. 读取配置
-	config.Setup(
+	bootstrap.SetupConfig(
 		file.NewSource(file.WithPath(configYml)),
 		database.Setup,
 		storage.Setup,
 	)
-	//注册监听函数
-	queue := sdk.Runtime.GetQueuePrefix("")
-	queue.Register(global.LoginLog, models.SaveLoginLog)
-	queue.Register(global.OperateLog, models.SaveOperaLog)
-	queue.Register(global.ApiCheck, models.SaveSysApi)
-	go queue.Run()
 
 	usageStr := `starting api server...`
 	log.Info(usageStr)
 }
 
+// startCronJobs registers the job implementations and starts a scheduler for
+// every tenant database.
+//
+// It is synchronous, like the phase that runs it. jobs.Setup returns now that
+// the `select {}` at the end of its per-tenant setup is gone, which is what
+// makes that possible; while it was there this could only be a goroutine, and
+// a goroutine is outside the panic guard.
+func startCronJobs() {
+	jobs.InitJob()
+	jobs.Setup(sdk.Runtime.GetAllDb())
+}
+
+// attachedQueue is the queue generation the consumers are attached to, plus
+// one, so that the zero value means "attached to nothing yet". Written from
+// the goroutine running the phase, read from the next one - rounds never
+// overlap, but they are not the same goroutine.
+var attachedQueue atomic.Uint64
+
+// attachQueueConsumers registers the log consumers against the queue that is
+// current, and starts it.
+//
+// It runs on AfterResource, so it runs again after every configuration reload
+// - and it has to. A reload rebuilds the queue adapter, and consumers
+// registered against the one that existed at start-up are attached to an
+// adapter nobody publishes to any more, so the login and operation logs stop
+// being written with nothing said about it.
+//
+// It is therefore idempotent with respect to a given queue rather than "does
+// nothing the second time": a new adapter gets a fresh set of consumers, the
+// same one gets none. Registering twice on the same queue would give every
+// message two consumers and write every log row twice.
+//
+// Generation 0 means the configuration has no queue section, so nothing was
+// installed and GetQueuePrefix hands back the runtime's own memory queue.
+// That case still gets consumers - it is what the previous unconditional
+// registration did, and dropping it would silently stop logging for anyone who
+// commented the section out - it just never gets them twice.
+func attachQueueConsumers() {
+	attachConsumersOnce(storage.QueueGeneration(), sdk.Runtime.GetQueuePrefix(""))
+}
+
+// attachConsumersOnce puts the log consumers on q and starts it, unless gen
+// says this queue already has them.
+//
+// Split out from attachQueueConsumers so that the order and the once-ness can
+// be checked against a queue the test controls: the sequence that matters here
+// cannot be read back out of a real adapter.
+func attachConsumersOnce(gen uint64, q corestorage.AdapterQueue) {
+	if attachedQueue.Load() == gen+1 {
+		return
+	}
+	attachedQueue.Store(gen + 1)
+
+	//注册监听函数
+	q.Register(global.LoginLog, models.SaveLoginLog)
+	q.Register(global.OperateLog, models.SaveOperaLog)
+	q.Register(global.ApiCheck, models.SaveSysApi)
+
+	// Started only now, and by whoever registered. setupQueue deliberately
+	// leaves it stopped: a queue that is already running refuses further
+	// registration, and the adapter in this path drops that error on the
+	// floor, so starting first loses consumers without a word.
+	go q.Run()
+}
+
 func run() error {
+	// Resolved first, and used both for the line it prints and for the
+	// shutdown that spends it. Reading the configuration again at signal time
+	// would let the two disagree, and the sum that gets printed is the whole
+	// point of printing it.
+	//
+	// Refused rather than corrected, and refused before anything is built: a
+	// budget that cannot be spent as written is a configuration error, and the
+	// moment to say so is while nothing depends on this process yet.
+	seconds, err := ext.ExtConfig.Shutdown.Budget()
+	if err != nil {
+		return err
+	}
+	reportShutdownBudget(seconds)
+
 	if config.ApplicationConfig.Mode == pkg.ModeProd.String() {
 		gin.SetMode(gin.ReleaseMode)
 	}
-	initRouter()
-
-	runStartupHooks()
+	buildRouter()
 
 	srv := &http.Server{
-		Addr:    fmt.Sprintf("%s:%d", config.ApplicationConfig.Host, config.ApplicationConfig.Port),
-		Handler: sdk.Runtime.GetEngine(),
+		Addr:         fmt.Sprintf("%s:%d", config.ApplicationConfig.Host, config.ApplicationConfig.Port),
+		Handler:      sdk.Runtime.GetEngine(),
 		ReadTimeout:  time.Duration(config.ApplicationConfig.ReadTimeout) * time.Second,
 		WriteTimeout: time.Duration(config.ApplicationConfig.WriterTimeout) * time.Second,
 	}
 
-	go func() {
-		jobs.InitJob()
-		jobs.Setup(sdk.Runtime.GetAllDb())
-
-	}()
-
 	if apiCheck {
 		var routers = sdk.Runtime.GetRouter()
 		q := sdk.Runtime.GetQueuePrefix("")
@@ -114,18 +202,17 @@ func run() error {
 		}
 	}
 
-	go func() {
-		// 服务连接
-		if config.SslConfig.Enable {
-			if err := srv.ListenAndServeTLS(config.SslConfig.Pem, config.SslConfig.KeyStr); err != nil && !errors.Is(err, http.ErrServerClosed) {
-				log.Fatal("listen: ", err)
-			}
-		} else {
-			if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
-				log.Fatal("listen: ", err)
-			}
-		}
-	}()
+	// Armed before the server starts serving, and well before the readiness
+	// banner: a signal arriving between "the process is up" and "the process
+	// is listening for signals" reaches the default handler and kills it
+	// without any of the shutdown below. That window is the whole reason
+	// arming is separate from waiting.
+	quit, disarmStopSignals := armStopSignals()
+
+	if err := startServing(srv, config.SslConfig.Enable, config.SslConfig.Pem, config.SslConfig.KeyStr); err != nil {
+		return err
+	}
+
 	fmt.Println(pkg.Red(string(global.LogoContent)))
 	tip()
 	fmt.Println(pkg.Green("Server run at:"))
@@ -135,23 +222,308 @@ func run() error {
 	fmt.Printf("-  Local:   http://localhost:%d/swagger/admin/index.html \r\n", config.ApplicationConfig.Port)
 	fmt.Printf("-  Network: %s://%s:%d/swagger/admin/index.html \r\n", "http", pkg.GetLocalHost(), config.ApplicationConfig.Port)
 	fmt.Printf("%s Enter Control + C Shutdown Server \r\n", pkg.GetCurrentTimeStr())
-	// 等待中断信号以优雅地关闭服务器（设置 5 秒的超时时间）
-	quit := make(chan os.Signal, 1)
-	signal.Notify(quit, os.Interrupt)
+
 	<-quit
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	log.Info("Shutdown Server ... ")
-
-	if err := srv.Shutdown(ctx); err != nil {
-		log.Fatal("Server Shutdown:", err)
+	serverErr, cleanupErr := gracefulShutdown(srv, quit, disarmStopSignals, budgetFrom(seconds))
+	if serverErr != nil {
+		// Not log.Fatal: that is an unconditional os.Exit(1), and Shutdown
+		// reports an error exactly when connections were still in flight -
+		// which is when the cleanup that ran after it mattered most.
+		log.Error("Server Shutdown: ", serverErr)
+	}
+	if cleanupErr != nil {
+		log.Error("Cleanup: ", cleanupErr)
 	}
-	log.Info("Server exiting")
 
 	return nil
 }
 
+// budget is the three waits a shutdown spends, in the order it spends them.
+type budget struct {
+	drain   time.Duration
+	server  time.Duration
+	cleanup time.Duration
+}
+
+// budgetFrom turns the resolved seconds into the durations the sequence waits
+// on.
+func budgetFrom(s ext.ShutdownBudget) budget {
+	return budget{
+		drain:   time.Duration(s.Drain) * time.Second,
+		server:  time.Duration(s.Server) * time.Second,
+		cleanup: time.Duration(s.Cleanup) * time.Second,
+	}
+}
+
+// defaultBudget is what a process with no extend.shutdown section spends.
+func defaultBudget() budget {
+	return budget{drain: drainTimeout, server: shutdownTimeout, cleanup: cleanupTimeout}
+}
+
+// gracefulShutdown takes the process down in the order that gives something
+// else a chance to notice first.
+//
+// The whole order lives here, and run() is not the only caller: the signal
+// tests run this function rather than reproducing it. A test that reproduces a
+// sequence asserts against its own copy and stays green while the sequence it
+// was written for regresses.
+//
+// The caller has already taken the first signal off quit. quit is handed on
+// because a second signal during the drain window ends the window early -
+// somebody sending another kill wants this over with sooner - and because
+// until the window is over that signal must not reach the default handler and
+// kill the process outright.
+//
+// disarm is therefore called at the end of the window rather than on the first
+// signal. After it, a second signal is handled by the default disposition
+// again, which is the only way out of a Shutdown or a cleanup callback that
+// never returns. Restoring it any earlier would put every ordinary shutdown
+// inside that escape hatch for the whole length of the drain, where before
+// this window existed only a hung callback could reach it.
+//
+// The two waits' errors are returned separately rather than logged: they fail
+// for different reasons, and the caller decides what each is worth.
+func gracefulShutdown(srv *http.Server, quit <-chan os.Signal, disarm func(), b budget) (serverErr, cleanupErr error) {
+	// Said before anything is taken apart. A configuration reload arriving in
+	// this window would otherwise re-run AfterResource - rebuilding the pool
+	// and the queue adapter, and re-registering consumers - on top of cleanup
+	// that has already run.
+	sdk.Runtime.BeginShutdown()
+
+	// Readiness fails from here, which is before the server stops accepting.
+	// That order is necessary and not sufficient: with nothing between this
+	// line and the listener closing, the two are microseconds apart and a
+	// poller on a multi-second interval sees the refused connection instead of
+	// the 503. The window below is what turns the order into something
+	// observable - extend.shutdown.drain, which is zero unless it is
+	// configured.
+	health.BeginDraining()
+
+	// Keep-alive off for the same window, and for the same reason. The server
+	// keeps connections alive while !disableKeepAlives && !shuttingDown(), and
+	// shuttingDown() is only set by Shutdown itself - so without this line
+	// every pooled connection stays open for the whole drain and is cut at the
+	// end of it anyway, which is the cost of the window without its benefit.
+	// This is the switch Shutdown flips, moved earlier by the window's length:
+	// answers now carry Connection: close, and the idle connections a balancer
+	// is holding are closed at once rather than when it next tries to use one.
+	srv.SetKeepAlivesEnabled(false)
+
+	drain(quit, b.drain)
+
+	// Restored here, not on the first signal: from this point a second signal
+	// must reach the default handler, so a shutdown that hangs can still be
+	// interrupted.
+	disarm()
+
+	log.Info("Shutdown Server ... ")
+	serverErr = shutdownServer(srv, b.server)
+	// Runs whether or not the wait above failed, and deliberately so: Shutdown
+	// reports an error exactly when connections were still in flight, which is
+	// when there is most left to clean up after.
+	cleanupErr = runShutdownHooks(b.cleanup)
+	log.Info("Server exiting")
+
+	return serverErr, cleanupErr
+}
+
+// drain keeps serving for d, or until another stop signal arrives.
+//
+// Requests are answered normally throughout. Refusing them would move the
+// outage earlier rather than avoid it - the point of the window is that this
+// instance is still able to work while whoever routes to it stops routing.
+func drain(quit <-chan os.Signal, d time.Duration) {
+	if d <= 0 {
+		return
+	}
+	log.Infof("Draining for %s: still serving, /ready answers 503 from here", d)
+
+	timer := time.NewTimer(d)
+	defer timer.Stop()
+	select {
+	case <-quit:
+		log.Info("Second signal during the drain window, closing the listener now")
+	case <-timer.C:
+	}
+}
+
+// Reference stop grace periods, printed when nothing was configured to compare
+// against. They are three times apart, which is why the check below needs a
+// configured value rather than a constant of its own: a budget that overruns
+// under one of them fits comfortably under the other.
+const (
+	dockerStopGraceSeconds = 10
+	kubernetesGraceSeconds = 30
+)
+
+// reportShutdownBudget states what a shutdown will spend and whether it fits.
+//
+// The sum is taken from the resolved values, not from the configuration file:
+// a field left out of extend.shutdown still costs its default, so adding up
+// what was written down understates the budget by exactly the fields nobody
+// wrote.
+func reportShutdownBudget(s ext.ShutdownBudget) {
+	log.Infof("shutdown budget: drain %ds + server %ds + cleanup %ds = %ds",
+		s.Drain, s.Server, s.Cleanup, s.Total())
+
+	if s.Grace <= 0 {
+		log.Infof("shutdown budget: extend.shutdown.grace is not set, so nothing is compared against it - "+
+			"for reference `docker stop` allows %ds and Kubernetes terminationGracePeriodSeconds defaults to %ds",
+			dockerStopGraceSeconds, kubernetesGraceSeconds)
+		return
+	}
+	if over := s.Overrun(); over > 0 {
+		// A minimum, not a target. This is somebody else's deployment under
+		// constraints this process cannot see, so the honest thing to state is
+		// how much is missing - the repository's own files are where there is
+		// standing to ask for headroom on top, and checksilent does that.
+		log.Warnf("shutdown budget of %ds does not fit inside the %ds of extend.shutdown.grace: "+
+			"SIGKILL arrives while the cleanup callbacks are still running, and the work they "+
+			"were about to finish is lost. It needs at least %ds more, or %ds less budget.",
+			s.Total(), s.Grace, over, over)
+		return
+	}
+	log.Infof("shutdown budget of %ds fits inside the %ds of extend.shutdown.grace", s.Total(), s.Grace)
+}
+
+// The budgets a shutdown spends when extend.shutdown configures nothing:
+// drainTimeout keeps the process serving after the stop signal, then
+// shutdownTimeout waits for in-flight requests, then cleanupTimeout is what
+// the BeforeExit callbacks get.
+//
+// The seconds come from config, which is where an absent field falls back, so
+// the default is one number rather than two that can drift apart.
+//
+// They are consumed one after the other, so their sum is what has to stay
+// inside the orchestrator's grace period: `docker stop` allows 10s by default
+// before it sends SIGKILL, and 0+5+3 leaves room for the process to finish
+// returning. Raising one without lowering another buys nothing - the budget
+// that runs out is the orchestrator's, and reportShutdownBudget is what says
+// so at start-up.
+var (
+	drainTimeout    = time.Duration(ext.DefaultDrainSeconds) * time.Second
+	shutdownTimeout = time.Duration(ext.DefaultServerSeconds) * time.Second
+	cleanupTimeout  = time.Duration(ext.DefaultCleanupSeconds) * time.Second
+)
+
+// armStopSignals registers for the stop signals and returns the channel they
+// arrive on together with the function that restores the default disposition.
+//
+// SIGTERM is what actually arrives in production: `docker stop`, a Kubernetes
+// pod deletion and `systemctl stop` all send it, and Go terminates the process
+// immediately for a signal nobody listens for. Registering only os.Interrupt
+// meant every graceful shutdown below the wait was dead code outside a
+// terminal.
+//
+// Registering is separate from waiting so a caller can arm before it announces
+// that it is ready: a signal that arrives between the two is delivered to the
+// default handler, which for both of these means the process dies without
+// running any of this.
+func armStopSignals() (<-chan os.Signal, func()) {
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, os.Interrupt, syscall.SIGTERM)
+	return quit, func() { signal.Stop(quit) }
+}
+
+// startServing binds srv.Addr, hands the listener to srv on its own goroutine,
+// and announces AfterListen.
+//
+// The bind is done here rather than left to ListenAndServe, which binds on the
+// goroutine that serves. That put the failure every deployment actually hits -
+// "address already in use" - on a goroutine nobody was reading, so the banner
+// went on to claim the server was up, and there would be no way to keep
+// AfterListen from announcing a socket that does not exist. A hook there is
+// promised a reachable port; the only way to keep that promise is for the bind
+// to have already happened on this goroutine.
+//
+// AfterListen is announced synchronously. Running it in a goroutine to save the
+// few milliseconds would let it overlap the shutdown: on a fast SIGTERM the
+// cleanup callbacks could finish before the startup ones had.
+//
+// Both ways of failing to start are therefore checked before the announcement:
+// the bind, and - with ssl enabled - the certificate.
+func startServing(srv *http.Server, useTLS bool, pem, key string) error {
+	if useTLS {
+		// Read the certificate before anything is announced. ServeTLS reads
+		// these files itself, but on the serving goroutine - so a bad
+		// certificate used to surface after AfterListen had already promised a
+		// reachable port. Loading it here costs one extra read and moves the
+		// failure onto this goroutine, where run() can return it.
+		//
+		// ServeTLS still does the real work below rather than this handing it a
+		// tls.Listener: that is what sets up HTTP/2 negotiation, and taking it
+		// over here would quietly drop h2 for every TLS deployment.
+		if _, err := tls.LoadX509KeyPair(pem, key); err != nil {
+			return errors.Wrap(err, "tls certificate")
+		}
+	}
+
+	ln, err := net.Listen("tcp", srv.Addr)
+	if err != nil {
+		return errors.Wrap(err, "listen")
+	}
+
+	go func() {
+		// 服务连接
+		var err error
+		if useTLS {
+			err = srv.ServeTLS(ln, pem, key)
+		} else {
+			err = srv.Serve(ln)
+		}
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			// Still fatal, as it was. Neither the bind nor the certificate is
+			// among the errors that reach here any more - both are checked
+			// above, on the caller's goroutine. What is left is a serve that
+			// failed after the port was taken, and carrying on would park the
+			// process on <-quit with nothing serving.
+			log.Fatal("serve: ", err)
+		}
+	}()
+
+	sdk.Runtime.RunPhase(runtime.AfterListen)
+	return nil
+}
+
+// shutdownServer stops srv, giving in-flight requests up to timeout to finish.
+//
+// It returns the error instead of exiting on it. A caller that exits here skips
+// its own cleanup, and Shutdown fails precisely when there was something left
+// to clean up after.
+func shutdownServer(srv *http.Server, timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	return srv.Shutdown(ctx)
+}
+
+// runShutdownHooks runs the BeforeExit callbacks with timeout to share.
+//
+// What the budget bounds is the wait, not the work. When it is gone RunShutdown
+// stops waiting and returns; a callback that never looks at its context carries
+// on until the process exits, and may leave a partial write behind. Go cannot
+// cancel a function that does not check for cancellation, which is why the
+// callbacks are handed a context at all.
+func runShutdownHooks(timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	return sdk.Runtime.RunShutdown(ctx)
+}
+
+// buildRouter announces BeforeRouter, builds the engine, and then drains the
+// startup registries.
+//
+// The order is the contract. BeforeRouter is the last point at which a module
+// can still affect how routes are built, so it has to run while there is no
+// engine yet. The before registry runStartupHooks drains is a different moment
+// despite the name: those callbacks run after initRouter has built the engine.
+// Two lines apart, and describing them as equivalent is a mistake this
+// repository has already made once in writing.
+func buildRouter() {
+	sdk.Runtime.RunPhase(runtime.BeforeRouter)
+	initRouter()
+	runStartupHooks()
+}
+
 // runStartupHooks runs the router registries and then the before callbacks.
 //
 // The package-level slice runs first and in its existing order, so a fork that
@@ -199,10 +571,38 @@ func initRouter() {
 		r.Use(handler.TlsHandler())
 	}
 	//r.Use(middleware.Metrics())
-	r.Use(common.Sentinel()).
+	r.Use(exemptProbes(common.Sentinel())).
 		Use(common.RequestId(pkg.TrafficKey)).
 		Use(api.SetRequestLogger)
 
 	common.InitMiddleware(r)
 
 }
+
+// probePaths are the two routes the rate limiter must not answer for.
+var probePaths = map[string]bool{
+	otherrouter.APIPrefix + otherrouter.HealthPath: true,
+	otherrouter.APIPrefix + otherrouter.ReadyPath:  true,
+}
+
+// exemptProbes wraps a middleware so the health and readiness routes skip it.
+//
+// The limiter is installed on the engine and the probes are routes like any
+// other, so above the threshold they are answered with 429 as well. A liveness
+// probe that collects 429s fails its threshold and the container is restarted,
+// which takes capacity out of a deployment that is already short of it and
+// pushes the rest closer to the threshold - the limiter working exactly as
+// intended is what causes it. It is the argument common/health makes about
+// restarting a process whose database is unreachable, applied to load.
+//
+// Wrapping rather than teaching the limiter about these paths: the limiter
+// lives under common/, which may not import the package that registers them.
+func exemptProbes(h gin.HandlerFunc) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if probePaths[c.FullPath()] {
+			c.Next()
+			return
+		}
+		h(c)
+	}
+}

cmd/api/shutdown_test.go

@@ -0,0 +1,139 @@
+package api
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	otherrouter "go-admin/app/other/router"
+	"go-admin/common/health"
+	ext "go-admin/config"
+)
+
+// The seconds in the configuration and the durations the sequence waits on are
+// two spellings of one budget, and only one of them is printed at start-up.
+func TestBudgetFromSeconds(t *testing.T) {
+	got := budgetFrom(ext.ShutdownBudget{Drain: 10, Server: 5, Cleanup: 3})
+	want := budget{
+		drain:   10 * time.Second,
+		server:  5 * time.Second,
+		cleanup: 3 * time.Second,
+	}
+	if got != want {
+		t.Errorf("budgetFrom = %+v, want %+v", got, want)
+	}
+}
+
+// The package variables and config.Default*Seconds have to say the same thing.
+// They are the same default written twice - once as durations for the shutdown
+// and once as seconds for the fallback - and a deployment that configures
+// nothing is entitled to one answer, not two.
+func TestDefaultBudgetIsTheConfiguredFallback(t *testing.T) {
+	unconfigured, err := ext.Shutdown{}.Budget()
+	if err != nil {
+		t.Fatalf("the empty section did not resolve: %v", err)
+	}
+	if got, want := defaultBudget(), budgetFrom(unconfigured); got != want {
+		t.Errorf("defaultBudget = %+v, want the unconfigured budget %+v", got, want)
+	}
+}
+
+// The rate limiter must not answer for the probes.
+//
+// It is installed on the engine, so without this the probes are limited like
+// any other route and answer 429 above the threshold. A liveness probe that
+// collects 429s fails its threshold and the container is restarted - taking
+// capacity out of a deployment that is already short of it and pushing the
+// rest closer to the threshold. The limiter working exactly as designed is
+// what would cause it.
+//
+// The stand-in rejects everything rather than being a real limiter: what is
+// under test is which requests reach it, and a real one would need the traffic
+// to cross a threshold before it said anything.
+func TestTheProbesSkipTheRateLimiter(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	var reached []string
+	r := gin.New()
+	r.Use(exemptProbes(func(c *gin.Context) {
+		reached = append(reached, c.FullPath())
+		c.AbortWithStatus(http.StatusTooManyRequests)
+	}))
+	v1 := r.Group(otherrouter.APIPrefix)
+	otherrouter.RegisterMonitorRouter(v1)
+	v1.GET("/business", func(c *gin.Context) { c.Status(http.StatusOK) })
+
+	for _, tc := range []struct {
+		path    string
+		limited bool
+	}{
+		{otherrouter.APIPrefix + otherrouter.HealthPath, false},
+		{otherrouter.APIPrefix + otherrouter.ReadyPath, false},
+		// Not a probe, and deliberately not exempt: the exemption is for the
+		// two routes an orchestrator acts on, not for everything under
+		// /api/v1 that happens to be unauthenticated.
+		{otherrouter.APIPrefix + "/metrics", true},
+		{otherrouter.APIPrefix + "/business", true},
+	} {
+		t.Run(tc.path, func(t *testing.T) {
+			w := httptest.NewRecorder()
+			r.ServeHTTP(w, httptest.NewRequest(http.MethodGet, tc.path, nil))
+
+			if tc.limited {
+				if w.Code != http.StatusTooManyRequests {
+					t.Errorf("answered %d, want the middleware's 429 - it was skipped for a route that is not a probe", w.Code)
+				}
+				return
+			}
+			if w.Code == http.StatusTooManyRequests {
+				t.Errorf("answered 429; a probe that can be rate-limited gets the container restarted under load")
+			}
+		})
+	}
+
+	// Said separately, because a probe could also answer 429 by itself: what
+	// has to be true is that the middleware never saw the request.
+	for _, p := range reached {
+		if probePaths[p] {
+			t.Errorf("the middleware ran for %s", p)
+		}
+	}
+}
+
+// /health has to stay 200 while draining, and it is the assertion most easily
+// lost by accident: making the liveness probe follow the readiness flag reads
+// like tidying up, and it turns every rolling restart into a kubelet-issued
+// kill part-way through the drain.
+func TestHealthStaysUpWhileDraining(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	r := gin.New()
+	v1 := r.Group(otherrouter.APIPrefix)
+	otherrouter.RegisterMonitorRouter(v1)
+
+	ask := func(path string) int {
+		w := httptest.NewRecorder()
+		r.ServeHTTP(w, httptest.NewRequest(http.MethodGet, path, nil))
+		return w.Code
+	}
+
+	if got := ask(otherrouter.APIPrefix + otherrouter.HealthPath); got != http.StatusOK {
+		t.Fatalf("/health answered %d before draining, want 200", got)
+	}
+
+	// Process-wide and one-way - nothing clears it - so this is the last thing
+	// in this package that may run in-process and care. Everything else that
+	// exercises draining does so in a child process of its own.
+	health.BeginDraining()
+
+	if got := ask(otherrouter.APIPrefix + otherrouter.HealthPath); got != http.StatusOK {
+		t.Errorf("/health answered %d while draining, want 200 - liveness is "+
+			"\"should I restart you\", and the answer during a drain is no", got)
+	}
+	if got := ask(otherrouter.APIPrefix + otherrouter.ReadyPath); got != http.StatusServiceUnavailable {
+		t.Errorf("/ready answered %d while draining, want 503", got)
+	}
+}

cmd/api/signal_test.go

@@ -0,0 +1,739 @@
+package api
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+
+	otherrouter "go-admin/app/other/router"
+)
+
+// The signal path cannot be exercised in-process: delivering a signal to the
+// test binary would race with the test framework, and the disposition changes
+// are global. So the test re-executes itself as a child, and the child runs
+// gracefulShutdown - the same function run() runs, not a second copy of the
+// sequence. A test that reproduces the sequence asserts against its own copy:
+// move BeginDraining after the drain window and the process regresses while
+// the test stays green, which is the failure mode this file exists to avoid.
+//
+// The child serves the real probe routes on an http.Server of its own rather
+// than the configured one: this repository's CI has no database
+// (.github/workflows/go.yml runs neither MySQL nor a sqlite-tagged build), and
+// none of what is under test needs one. /ready answers 503 either way - with
+// no database its checks fail - so the assertions below are on the draining
+// answer specifically, not on the status code alone.
+const (
+	childEnv         = "GO_ADMIN_SIGNAL_CHILD"
+	childStuckEnv    = "GO_ADMIN_SIGNAL_CHILD_STUCK"
+	childHangConn    = "GO_ADMIN_SIGNAL_CHILD_HANGCONN"
+	childSlowCleanup = "GO_ADMIN_SIGNAL_CHILD_SLOWCLEANUP"
+	childDrainMS     = "GO_ADMIN_SIGNAL_CHILD_DRAIN_MS"
+	markerAddr       = "CHILD-ADDR"
+	markerReady      = "CHILD-READY"
+	markerSignal     = "CHILD-SIGNAL"
+	markerShutdown   = "CHILD-SHUTDOWN-OK"
+	markerCleanup    = "CHILD-CLEANUP-RAN"
+	markerTook       = "CHILD-TOOK-NS"
+	markerExiting    = "CHILD-EXITING"
+)
+
+// childPingRoute is an ordinary route, registered beside the probes so the
+// window can be checked for what it promises: requests arriving inside it are
+// served, not refused. Refusing them would move the outage earlier instead of
+// avoiding it.
+const childPingRoute = "/signal-test-ping"
+
+var (
+	readyPath  = otherrouter.APIPrefix + otherrouter.ReadyPath
+	healthPath = otherrouter.APIPrefix + otherrouter.HealthPath
+	pingPath   = otherrouter.APIPrefix + childPingRoute
+)
+
+// TestSignalChild is the child process. It is skipped in a normal run.
+func TestSignalChild(t *testing.T) {
+	if os.Getenv(childEnv) != "1" {
+		t.Skip("child process entry point")
+	}
+
+	gin.SetMode(gin.TestMode)
+	engine := gin.New()
+	v1 := engine.Group(otherrouter.APIPrefix)
+	otherrouter.RegisterMonitorRouter(v1)
+	v1.GET(childPingRoute, func(c *gin.Context) { c.String(http.StatusOK, "pong") })
+
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		fmt.Println("listen:", err)
+		os.Exit(3)
+	}
+	// accepted fires once the server has taken a connection off the listener.
+	// Dialling is not enough: Shutdown only waits for connections the server
+	// has already accepted, so calling it between the dial and the accept
+	// finds nothing to wait for and returns immediately.
+	accepted := make(chan struct{}, 1)
+	srv := &http.Server{
+		Handler: engine,
+		ConnState: func(_ net.Conn, state http.ConnState) {
+			if state == http.StateNew {
+				select {
+				case accepted <- struct{}{}:
+				default:
+				}
+			}
+		},
+	}
+	go func() { _ = srv.Serve(ln) }()
+
+	// The budget the child spends. Nothing here calls bootstrap.SetupConfig, so
+	// with no environment set this is the budget of a deployment that
+	// configures no extend.shutdown section at all.
+	b := defaultBudget()
+	if ms := os.Getenv(childDrainMS); ms != "" {
+		n, err := strconv.Atoi(ms)
+		if err != nil {
+			fmt.Println("drain:", err)
+			os.Exit(4)
+		}
+		b.drain = time.Duration(n) * time.Millisecond
+	}
+
+	// A BeforeExit callback, registered the way a module would. What the tests
+	// below care about is whether it runs at all - after a Shutdown that
+	// failed, and after its own budget has been spent.
+	sdk.Runtime.SetShutdown(func(ctx context.Context) {
+		switch {
+		case os.Getenv(childStuckEnv) == "1":
+			// Stands in for a cleanup hook that never finishes. The point of
+			// restoring the signal disposition after the drain window is that
+			// a second signal still reaches the default handler and kills this.
+			time.Sleep(2 * time.Minute)
+		case os.Getenv(childSlowCleanup) == "1":
+			// Outlasts the budget on purpose, and does not consult ctx - which
+			// is the case the contract is explicit about: what the context
+			// bounds is the wait, not the work.
+			time.Sleep(2 * time.Second)
+		}
+		fmt.Println(markerCleanup)
+		_ = os.Stdout.Sync()
+	})
+	switch {
+	case os.Getenv(childStuckEnv) == "1":
+		b.cleanup = 2 * time.Minute
+	case os.Getenv(childSlowCleanup) == "1":
+		b.cleanup = 300 * time.Millisecond
+	}
+
+	// Arm before announcing readiness. Doing it the other way round leaves a
+	// window in which the parent's signal reaches the default handler and
+	// kills the child before any of this runs - which is exactly the failure
+	// this whole change is about, so the test must not reproduce it by
+	// accident.
+	quit, disarm := armStopSignals()
+
+	fmt.Println(markerAddr, ln.Addr().String())
+	fmt.Println(markerReady)
+	_ = os.Stdout.Sync()
+
+	sig := <-quit
+	fmt.Println(markerSignal, sig)
+	_ = os.Stdout.Sync()
+
+	if os.Getenv(childHangConn) == "1" {
+		// Dialled here, not at start-up. net/http stops counting a StateNew
+		// connection against Shutdown once it is more than five seconds old,
+		// so a connection opened before the wait would age out on a slow CI
+		// run and Shutdown would succeed - leaving the test asserting nothing.
+		c, err := net.Dial("tcp", ln.Addr().String())
+		if err != nil {
+			fmt.Println("dial:", err)
+			os.Exit(5)
+		}
+		defer func() { _ = c.Close() }()
+
+		// And wait for the accept, for the opposite reason: an unaccepted
+		// connection is not one Shutdown waits for either.
+		select {
+		case <-accepted:
+		case <-time.After(10 * time.Second):
+			fmt.Println("the server never accepted the stalling connection")
+			os.Exit(6)
+		}
+
+		// A connection that has sent nothing keeps Shutdown busy: net/http
+		// only treats a StateNew connection as idle once it is more than five
+		// seconds old. A short budget makes the timeout deterministic without
+		// waiting out the real one.
+		b.server = 300 * time.Millisecond
+	}
+
+	started := time.Now()
+	serverErr, cleanupErr := gracefulShutdown(srv, quit, disarm, b)
+	spent := time.Since(started)
+
+	if serverErr != nil {
+		// Deliberately not fatal, and deliberately not a bare return: the
+		// point is that whatever follows still runs.
+		fmt.Println("shutdown error:", serverErr)
+	} else {
+		fmt.Println(markerShutdown)
+	}
+	if cleanupErr != nil {
+		fmt.Println("cleanup error:", cleanupErr)
+	}
+	fmt.Println(markerTook, spent.Nanoseconds())
+	fmt.Println(markerExiting)
+	_ = os.Stdout.Sync()
+}
+
+func startChild(t *testing.T, stuck bool, extraEnv ...string) (*exec.Cmd, chan string) {
+	t.Helper()
+
+	r, w, err := os.Pipe()
+	if err != nil {
+		t.Fatalf("pipe: %v", err)
+	}
+	cmd := exec.Command(os.Args[0], "-test.run=TestSignalChild", "-test.v")
+	cmd.Env = append(os.Environ(), childEnv+"=1")
+	if stuck {
+		cmd.Env = append(cmd.Env, childStuckEnv+"=1")
+	}
+	cmd.Env = append(cmd.Env, extraEnv...)
+	cmd.Stdout = w
+	cmd.Stderr = w
+	if err := cmd.Start(); err != nil {
+		t.Fatalf("start child: %v", err)
+	}
+	_ = w.Close()
+
+	lines := make(chan string, 256)
+	go func() {
+		defer close(lines)
+		buf := make([]byte, 4096)
+		var acc strings.Builder
+		for {
+			n, err := r.Read(buf)
+			if n > 0 {
+				acc.Write(buf[:n])
+				for {
+					s := acc.String()
+					i := strings.IndexByte(s, '\n')
+					if i < 0 {
+						break
+					}
+					lines <- s[:i]
+					acc.Reset()
+					acc.WriteString(s[i+1:])
+				}
+			}
+			if err != nil {
+				if acc.Len() > 0 {
+					lines <- acc.String()
+				}
+				return
+			}
+		}
+	}()
+
+	t.Cleanup(func() {
+		_ = cmd.Process.Kill()
+		_, _ = cmd.Process.Wait()
+		_ = r.Close()
+	})
+	return cmd, lines
+}
+
+// await drains lines until one contains want, or the deadline passes. It
+// returns everything it saw, so a failure says what the child actually did,
+// and the matching line, so a marker can carry a value.
+func await(t *testing.T, lines chan string, want string, d time.Duration) ([]string, string) {
+	t.Helper()
+	var seen []string
+	deadline := time.After(d)
+	for {
+		select {
+		case l, ok := <-lines:
+			if !ok {
+				t.Fatalf("child output ended before %q; saw:\n%s", want, strings.Join(seen, "\n"))
+			}
+			seen = append(seen, l)
+			if strings.Contains(l, want) {
+				return seen, l
+			}
+		case <-deadline:
+			t.Fatalf("timed out waiting for %q; saw:\n%s", want, strings.Join(seen, "\n"))
+		}
+	}
+}
+
+// childAddr waits for the address the child is listening on.
+func childAddr(t *testing.T, lines chan string) string {
+	t.Helper()
+	_, line := await(t, lines, markerAddr, 30*time.Second)
+	fields := strings.Fields(line)
+	return fields[len(fields)-1]
+}
+
+// took reads the nanoseconds gracefulShutdown spent, as the child measured
+// them. Measured inside the child on purpose: the parent's own clock includes
+// process scheduling, which is the noise the tightest assertion here cannot
+// afford.
+func took(t *testing.T, lines chan string, d time.Duration) time.Duration {
+	t.Helper()
+	_, line := await(t, lines, markerTook, d)
+	fields := strings.Fields(line)
+	ns, err := strconv.ParseInt(fields[len(fields)-1], 10, 64)
+	if err != nil {
+		t.Fatalf("unreadable %s line %q: %v", markerTook, line, err)
+	}
+	return time.Duration(ns)
+}
+
+// sample is one answer, or the refusal that replaced it.
+type sample struct {
+	at   time.Time
+	path string
+	// status is zero when the connection could not be made at all, which is
+	// what a closed listener looks like from outside.
+	status   int
+	draining bool
+	// willClose is what the server answered about the connection: the header
+	// it sends is Connection: close, which the transport consumes and reports
+	// here rather than leaving in Response.Header.
+	willClose bool
+}
+
+// probe asks once, on a connection of its own.
+//
+// A new transport per request, because a connection opened before the signal
+// can still be served after the listener is closed: reusing one would let this
+// test pass against a shutdown that had already broken the listener. Keep-alive
+// is left enabled so the server's own Connection: close is observable - a
+// client that asked for close would get that header back either way, and the
+// assertion would prove nothing.
+func probe(addr, path string) sample {
+	tr := &http.Transport{}
+	defer tr.CloseIdleConnections()
+	c := &http.Client{Transport: tr, Timeout: 3 * time.Second}
+
+	s := sample{at: time.Now(), path: path}
+	resp, err := c.Get("http://" + addr + path)
+	if err != nil {
+		return s
+	}
+	defer func() { _ = resp.Body.Close() }()
+	body, _ := io.ReadAll(resp.Body)
+	s.status = resp.StatusCode
+	s.willClose = resp.Close
+	s.draining = strings.Contains(string(body), `"status":"draining"`)
+	return s
+}
+
+// watcher polls the child until it stops accepting connections, keeping every
+// answer.
+type watcher struct {
+	mu      sync.Mutex
+	samples []sample
+	done    chan struct{}
+}
+
+func watch(addr string, paths ...string) *watcher {
+	w := &watcher{done: make(chan struct{})}
+	go func() {
+		defer close(w.done)
+		for {
+			refused := false
+			for _, p := range paths {
+				s := probe(addr, p)
+				w.mu.Lock()
+				w.samples = append(w.samples, s)
+				w.mu.Unlock()
+				if s.status == 0 {
+					refused = true
+				}
+			}
+			if refused {
+				return
+			}
+			time.Sleep(20 * time.Millisecond)
+		}
+	}()
+	return w
+}
+
+// sawDraining reports whether /ready has answered "draining" yet.
+func (w *watcher) sawDraining() bool {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	for _, s := range w.samples {
+		if s.path == readyPath && s.draining {
+			return true
+		}
+	}
+	return false
+}
+
+func (w *watcher) wait(t *testing.T, d time.Duration) []sample {
+	t.Helper()
+	select {
+	case <-w.done:
+	case <-time.After(d):
+		t.Fatal("the child never stopped accepting connections")
+	}
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	return w.samples
+}
+
+func describe(samples []sample) string {
+	var b strings.Builder
+	for _, s := range samples {
+		fmt.Fprintf(&b, "  %s %s -> %d draining=%v willClose=%v\n",
+			s.at.Format("15:04:05.000"), s.path, s.status, s.draining, s.willClose)
+	}
+	return b.String()
+}
+
+// Acceptance 19. Registering only os.Interrupt meant SIGTERM - the signal
+// `docker stop`, Kubernetes and systemd all send - terminated the process
+// before any of the shutdown path ran. Both must now reach it.
+func TestBothSignalsRunTheShutdownPath(t *testing.T) {
+	for _, tc := range []struct {
+		name string
+		sig  syscall.Signal
+	}{
+		{"SIGINT", syscall.SIGINT},
+		{"SIGTERM", syscall.SIGTERM},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			cmd, lines := startChild(t, false)
+			await(t, lines, markerReady, 30*time.Second)
+
+			if err := cmd.Process.Signal(tc.sig); err != nil {
+				t.Fatalf("signal: %v", err)
+			}
+
+			await(t, lines, markerSignal, 10*time.Second)
+			await(t, lines, markerShutdown, 10*time.Second)
+			await(t, lines, markerExiting, 10*time.Second)
+
+			if err := cmd.Wait(); err != nil {
+				t.Fatalf("child exited with %v, want a clean exit", err)
+			}
+		})
+	}
+}
+
+// Acceptance 20. quit is a buffered channel and signal.Notify stays armed, so
+// without restoring the disposition a second signal only refills the buffer:
+// once SIGTERM is registered, a shutdown that hangs could not be interrupted by
+// anything short of SIGKILL.
+//
+// The hang is now a cleanup callback that never returns, which is where a
+// shutdown actually hangs, and it is reached through gracefulShutdown - so this
+// also pins where the disposition is restored. Restore it before the drain
+// window and the window itself becomes the interruptible part; restore it never
+// and this test hangs.
+func TestASecondSignalStillKillsAStuckShutdown(t *testing.T) {
+	cmd, lines := startChild(t, true)
+	await(t, lines, markerReady, 30*time.Second)
+
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("first signal: %v", err)
+	}
+	await(t, lines, markerSignal, 10*time.Second)
+
+	// The child is now on its way into a cleanup that will not finish on its
+	// own. Signalled repeatedly rather than once: the marker is printed just
+	// before gracefulShutdown is entered, and the disposition is not restored
+	// until the drain window is over - zero seconds here, but not zero
+	// instructions - so a single signal sent immediately after the marker can
+	// still land in the buffered channel and be dropped. Which of them does
+	// the killing is not the assertion; that one of them can is.
+	done := make(chan error, 1)
+	go func() { done <- cmd.Wait() }()
+
+	retry := time.NewTicker(200 * time.Millisecond)
+	defer retry.Stop()
+	deadline := time.After(15 * time.Second)
+	for {
+		select {
+		case err := <-done:
+			if err == nil {
+				t.Fatal("child exited cleanly; it was supposed to be killed by the second signal")
+			}
+			return
+		case <-retry.C:
+			if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+				t.Fatalf("second signal: %v", err)
+			}
+		case <-deadline:
+			t.Fatal("the second signal did not kill a stuck shutdown - the escape hatch is gone")
+		}
+	}
+}
+
+// Acceptance 21. srv.Shutdown reports an error exactly when connections were
+// still in flight, and the old code answered that with log.Fatal - an
+// unconditional os.Exit(1). Everything after it, which is where the cleanup
+// hooks will hang, never ran. A failed Shutdown must not end the process.
+func TestShutdownTimeoutDoesNotStopWhatFollows(t *testing.T) {
+	cmd, lines := startChild(t, false, childHangConn+"=1")
+	await(t, lines, markerReady, 30*time.Second)
+
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("signal: %v", err)
+	}
+	await(t, lines, markerSignal, 10*time.Second)
+
+	seen, _ := await(t, lines, markerExiting, 20*time.Second)
+
+	var timedOut bool
+	for _, l := range seen {
+		if strings.Contains(l, "shutdown error:") {
+			timedOut = true
+		}
+	}
+	if !timedOut {
+		t.Fatalf("Shutdown did not time out, so this test proves nothing; saw:\n%s",
+			strings.Join(seen, "\n"))
+	}
+	var cleaned bool
+	for _, l := range seen {
+		if strings.Contains(l, markerCleanup) {
+			cleaned = true
+		}
+	}
+	if !cleaned {
+		t.Fatalf("the BeforeExit callback did not run after a failed Shutdown; saw:\n%s",
+			strings.Join(seen, "\n"))
+	}
+	if err := cmd.Wait(); err != nil {
+		t.Fatalf("child exited with %v after a failed Shutdown, want a clean exit", err)
+	}
+}
+
+// A callback that outlasts its budget must not take the process with it, and
+// must not be waited for: RunShutdown reports the deadline and returns, the
+// callback carries on, and the process still exits cleanly. This is the half of
+// the contract that is easy to get backwards - the context bounds the wait, not
+// the work, because Go cannot cancel a function that does not check for it.
+func TestACleanupThatOutlastsItsBudgetIsAbandonedNotAwaited(t *testing.T) {
+	cmd, lines := startChild(t, false, childSlowCleanup+"=1")
+	await(t, lines, markerReady, 30*time.Second)
+
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("signal: %v", err)
+	}
+	await(t, lines, markerSignal, 10*time.Second)
+
+	// The budget is 300ms and the callback sleeps two seconds. If RunShutdown
+	// waited for it, this marker would not arrive for two seconds; the one
+	// second here is what makes "abandoned, not awaited" the thing asserted.
+	seen, _ := await(t, lines, markerExiting, 1*time.Second)
+
+	var reported bool
+	for _, l := range seen {
+		if strings.Contains(l, "cleanup error:") {
+			reported = true
+		}
+		if strings.Contains(l, markerCleanup) {
+			t.Fatalf("the slow callback finished before the process moved on, so nothing was abandoned; saw:\n%s",
+				strings.Join(seen, "\n"))
+		}
+	}
+	if !reported {
+		t.Fatalf("RunShutdown returned no error for a callback that outlasted the budget; saw:\n%s",
+			strings.Join(seen, "\n"))
+	}
+	if err := cmd.Wait(); err != nil {
+		t.Fatalf("child exited with %v, want a clean exit despite the abandoned callback", err)
+	}
+}
+
+// The core acceptance: with a drain window configured, something outside the
+// process can observe that this instance is draining, on a connection it opens
+// after the signal, and can still be served while it does.
+//
+// Two windows rather than one. A single value proves only that something takes
+// that long, which a hard-coded sleep anywhere in the sequence would satisfy;
+// two say the wait is the configured one.
+//
+// What each answer is for:
+//
+//   - /ready reporting "draining" is the window being observable at all. The
+//     status code alone would not say it: with no database configured the
+//     probe's own checks fail and 503 is also the answer before the signal.
+//   - The server refusing to keep those connections alive is the window being
+//     useful. It keeps them alive until Shutdown sets shuttingDown(), so
+//     without switching keep-alive off here a balancer's pool would sit
+//     untouched for the whole window and be cut at the end of it anyway. The
+//     header saying so is Connection: close; the transport consumes it and
+//     reports it as Response.Close, which is what a sample records.
+//   - /health staying 200 is the window not asking to be restarted, and the
+//     ordinary route staying 200 is the window not refusing work. Draining is
+//     "stop sending me new work", not "reject what arrives".
+func TestTheDrainWindowIsObservableWhileStillServing(t *testing.T) {
+	for _, drain := range []time.Duration{300 * time.Millisecond, 1200 * time.Millisecond} {
+		t.Run(drain.String(), func(t *testing.T) {
+			cmd, lines := startChild(t, false,
+				fmt.Sprintf("%s=%d", childDrainMS, drain.Milliseconds()))
+			addr := childAddr(t, lines)
+			await(t, lines, markerReady, 30*time.Second)
+
+			w := watch(addr, readyPath, healthPath, pingPath)
+			// Long enough for a round of answers from a server that is not yet
+			// draining, which is what the keep-alive assertion below compares
+			// against.
+			time.Sleep(150 * time.Millisecond)
+
+			signalAt := time.Now()
+			if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+				t.Fatalf("signal: %v", err)
+			}
+
+			samples := w.wait(t, drain+30*time.Second)
+			spent := took(t, lines, 10*time.Second)
+			await(t, lines, markerExiting, 10*time.Second)
+
+			if spent < drain {
+				t.Errorf("the shutdown took %s, want at least the %s window", spent, drain)
+			}
+
+			var refusedAt = -1
+			for i, s := range samples {
+				if s.status == 0 {
+					refusedAt = i
+					break
+				}
+			}
+			if refusedAt < 0 {
+				t.Fatalf("the child never stopped accepting; saw:\n%s", describe(samples))
+			}
+
+			var keptAliveBefore, drainingInside, closedInside bool
+			for _, s := range samples[:refusedAt] {
+				switch s.path {
+				case readyPath:
+					if s.at.Before(signalAt) && !s.draining && !s.willClose {
+						keptAliveBefore = true
+					}
+					if s.at.After(signalAt) && s.draining {
+						drainingInside = true
+						if s.willClose {
+							closedInside = true
+						}
+					}
+				case healthPath, pingPath:
+					if s.status != http.StatusOK {
+						t.Errorf("%s answered %d before the listener closed, want 200;\n%s",
+							s.path, s.status, describe(samples))
+					}
+				}
+			}
+
+			if !keptAliveBefore {
+				t.Fatalf("no answer before the signal kept the connection alive, so the header assertion below proves nothing;\n%s",
+					describe(samples))
+			}
+			if !drainingInside {
+				t.Errorf("no answer inside the window reported draining; the flip and the closed listener were not far enough apart to observe;\n%s",
+					describe(samples))
+			}
+			if !closedInside {
+				t.Errorf("answers inside the window still kept the connection alive, so a pooled connection survives the whole window and is cut at the end of it anyway;\n%s",
+					describe(samples))
+			}
+
+			if err := cmd.Wait(); err != nil {
+				t.Fatalf("child exited with %v, want a clean exit", err)
+			}
+		})
+	}
+}
+
+// The default has to be no window at all: a process that configures no
+// extend.shutdown section must shut down the way it did before the section
+// existed.
+//
+// Asserted as a sequence rather than as a duration. How long a shutdown takes
+// is decided by how much the cleanup callbacks have to do, so "as fast as
+// before" is not falsifiable; "nothing was inserted between the signal and the
+// listener closing" is.
+func TestAnUnconfiguredShutdownAddsNoWindow(t *testing.T) {
+	cmd, lines := startChild(t, false)
+	await(t, lines, markerReady, 30*time.Second)
+
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("signal: %v", err)
+	}
+	await(t, lines, markerSignal, 10*time.Second)
+
+	spent := took(t, lines, 10*time.Second)
+	if spent > 100*time.Millisecond {
+		t.Errorf("an unconfigured shutdown spent %s between the signal and exiting; "+
+			"with no drain window and no cleanup callbacks it must be immediate", spent)
+	}
+
+	if err := cmd.Wait(); err != nil {
+		t.Fatalf("child exited with %v, want a clean exit", err)
+	}
+}
+
+// A second signal during the window ends it early rather than killing the
+// process. Somebody sending another kill wants this over with sooner, and the
+// answer to that is to stop draining - not to skip the cleanup, which is what
+// the default disposition would do.
+//
+// This is the pair to TestASecondSignalStillKillsAStuckShutdown: the escape
+// hatch has to be closed for the length of the window and open after it.
+func TestASecondSignalEndsTheDrainWindowEarly(t *testing.T) {
+	// Long enough that the shutdown cannot plausibly have taken this long on
+	// its own, short enough that the test does not sit out the whole window
+	// when the early exit is missing - it fails on the reported duration
+	// instead of on a timeout, which says which of the two broke.
+	const window = 10 * time.Second
+	cmd, lines := startChild(t, false,
+		fmt.Sprintf("%s=%d", childDrainMS, window.Milliseconds()))
+	addr := childAddr(t, lines)
+	await(t, lines, markerReady, 30*time.Second)
+
+	w := watch(addr, readyPath)
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("first signal: %v", err)
+	}
+
+	deadline := time.Now().Add(15 * time.Second)
+	for !w.sawDraining() {
+		if time.Now().After(deadline) {
+			t.Fatal("the child never reported draining, so the second signal below would not land inside the window")
+		}
+		time.Sleep(20 * time.Millisecond)
+	}
+
+	if err := cmd.Process.Signal(syscall.SIGTERM); err != nil {
+		t.Fatalf("second signal: %v", err)
+	}
+
+	spent := took(t, lines, window+20*time.Second)
+	if spent >= window {
+		t.Errorf("the window ran its full %s despite a second signal (%s); the signal was ignored", window, spent)
+	}
+	await(t, lines, markerExiting, 10*time.Second)
+
+	if err := cmd.Wait(); err != nil {
+		t.Fatalf("child exited with %v; a second signal inside the window must end the window, not the process", err)
+	}
+}

cmd/migrate/migration/init.go

@@ -3,7 +3,6 @@ package migration
 import (
 	"fmt"
 	"log"
-	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
@@ -11,11 +10,21 @@ import (
 
 	"gorm.io/gorm"
 
+	contractmigration "github.com/go-admin-team/go-admin-core/v2/sdk/contract/migration"
+
 	common "go-admin/common/models"
 )
 
 var Migrate = newMigration()
 
+// contractSnapshot is contractmigration.Snapshot, indirected through a
+// package-level variable so tests can substitute an isolated
+// *contractmigration.Registry's Snapshot instead of reaching into
+// go-admin-core's single process-wide registry, which every *Migration in
+// this process - test-local or the package-level Migrate - reads through the
+// same call. See mergedEntries.
+var contractSnapshot = contractmigration.Snapshot
+
 func newMigration() *Migration {
 	return &Migration{version: make(map[string]versionEntry)}
 }
@@ -135,6 +144,47 @@ func namespacedKey(appCode, k string) string {
 	return appCode + "-" + k
 }
 
+// mergedEntries returns every migration this process knows about: the
+// host's own registry (e.version, filled by version/*.go and
+// version-local/*.go through SetVersion/ForApp) plus whatever a third-party
+// application registered through go-admin-core's sdk/contract/migration
+// package (PRD 006, F9's host wiring).
+//
+// That package keeps its own process-wide registry, entirely separate from
+// e.version, because a third-party application cannot reach into this
+// process to call an unexported method on *Migration - contract/migration's
+// package-level ForApp/Snapshot are the only door open to it. Without this
+// merge, migrate/status/--dry-run would only ever see the host's own
+// migrations: an application's ForApp("crm").SetVersion(...) would compile,
+// register successfully into contract/migration's registry, and then never
+// run, with no error anywhere - the exact silent gap this method closes.
+//
+// Entry and versionEntry are structurally identical (an app code plus a
+// func(db, version) error); the conversion below exists only because they
+// are two distinct named types, one per package, not because the data
+// differs.
+func (e *Migration) mergedEntries() map[string]versionEntry {
+	e.mutex.Lock()
+	out := make(map[string]versionEntry, len(e.version))
+	for k, v := range e.version {
+		out[k] = v
+	}
+	e.mutex.Unlock()
+
+	for k, entry := range contractSnapshot() {
+		if _, exists := out[k]; exists {
+			// contract/migration.ForApp namespaces every app-owned key as
+			// appCode + "-" + k, and appCode is reserved from ""/"core", so
+			// this should never collide with a host-registered key. If it
+			// somehow does, the host's own registration wins rather than
+			// silently overwriting it.
+			continue
+		}
+		out[k] = versionEntry{appCode: entry.AppCode, fn: entry.Fn}
+	}
+	return out
+}
+
 // StatusEntry is one row of migrate status.
 type StatusEntry struct {
 	AppCode    string
@@ -156,12 +206,11 @@ func (e *Migration) Status() ([]StatusEntry, error) {
 		return nil, fmt.Errorf("migration: no database configured")
 	}
 
-	e.mutex.Lock()
-	registered := make(map[string]string, len(e.version))
-	for k, v := range e.version {
+	all := e.mergedEntries()
+	registered := make(map[string]string, len(all))
+	for k, v := range all {
 		registered[k] = v.appCode
 	}
-	e.mutex.Unlock()
 
 	applied := make(map[string]common.Migration)
 	// A database that has never been migrated has no sys_migration table.
@@ -247,12 +296,11 @@ func DisplayAppCode(code string) string {
 // AppCodes lists the app codes with at least one registered migration, framework
 // included under its display name, sorted.
 func (e *Migration) AppCodes() []string {
-	e.mutex.Lock()
+	all := e.mergedEntries()
 	seen := map[string]struct{}{}
-	for _, v := range e.version {
+	for _, v := range all {
 		seen[DisplayAppCode(v.appCode)] = struct{}{}
 	}
-	e.mutex.Unlock()
 
 	out := make([]string, 0, len(seen))
 	for code := range seen {
@@ -263,17 +311,16 @@ func (e *Migration) AppCodes() []string {
 }
 
 func (e *Migration) run(appCode string) {
-	e.mutex.Lock()
-	versions := make([]string, 0, len(e.version))
-	entries := make(map[string]versionEntry, len(e.version))
-	for k, v := range e.version {
+	all := e.mergedEntries()
+	versions := make([]string, 0, len(all))
+	entries := make(map[string]versionEntry, len(all))
+	for k, v := range all {
 		if appCode != allApps && v.appCode != appCode {
 			continue
 		}
 		versions = append(versions, k)
 		entries[k] = v
 	}
-	e.mutex.Unlock()
 	sort.Strings(versions)
 
 	// A mistyped --app would otherwise select nothing and report "no
@@ -315,7 +362,10 @@ func (e *Migration) run(appCode string) {
 // from the empty app code, which selects the framework's own migrations.
 const allApps = "\x00all"
 
+// GetFilename derives a migration's version from its file name. The rule
+// lives in contract/migration, because an application registering through
+// that package names its files by the same convention and must land on the
+// same version string; a second copy here is a second thing to keep in step.
 func GetFilename(s string) string {
-	s = filepath.Base(s)
-	return s[:13]
+	return contractmigration.GetFilename(s)
 }

cmd/migrate/migration/init_test.go

@@ -12,9 +12,26 @@ import (
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
 
+	contractmigration "github.com/go-admin-team/go-admin-core/v2/sdk/contract/migration"
+
 	common "go-admin/common/models"
 )
 
+// withContractRegistry points contractSnapshot at an isolated
+// *contractmigration.Registry for the duration of one test, instead of
+// go-admin-core's single process-wide one - see contractSnapshot's doc
+// comment for why that indirection exists. Restored on cleanup so other
+// tests in this package keep seeing an empty contract registry regardless of
+// run order.
+func withContractRegistry(t *testing.T) *contractmigration.Registry {
+	t.Helper()
+	reg := contractmigration.NewRegistry()
+	orig := contractSnapshot
+	contractSnapshot = reg.Snapshot
+	t.Cleanup(func() { contractSnapshot = orig })
+	return reg
+}
+
 func newTestDB(t *testing.T) *gorm.DB {
 	t.Helper()
 	db, err := gorm.Open(sqlite.Open("file:"+t.Name()+"?mode=memory&cache=shared"), &gorm.Config{
@@ -388,3 +405,178 @@ func TestMigrateAppOnAnUnknownCodeSaysSo(t *testing.T) {
 		t.Errorf("a typo ran %v", rows)
 	}
 }
+
+// This is the acceptance test for PRD 006's host-wiring gap: a migration
+// registered through contract/migration.ForApp - the only door open to a
+// third-party application - must actually run, be recorded under its app
+// code, and show up in AppCodes/Status/--app the same as one registered
+// through the host's own m.ForApp. Before mergedEntries existed, m.Migrate()
+// never looked at contract/migration's registry at all, so this compiled,
+// registered, and silently never ran.
+func TestMergedEntriesRunsAContractRegisteredAppMigration(t *testing.T) {
+	reg := withContractRegistry(t)
+	db := newTestDB(t)
+	m := newMigration()
+	m.SetDb(db)
+
+	ran := false
+	reg.ForApp("order").SetVersion("1793800000000", func(db *gorm.DB, version, appCode string) error {
+		ran = true
+		return recordFor(db, version, appCode)
+	})
+
+	m.Migrate()
+
+	if !ran {
+		t.Fatal("contract-registered migration did not run")
+	}
+	rows := rowsByVersion(t, db)
+	row, ok := rows["order-1793800000000"]
+	if !ok {
+		t.Fatalf("no row for order-1793800000000; got %v", rows)
+	}
+	if row.AppCode != "order" {
+		t.Errorf("app_code = %q, want %q", row.AppCode, "order")
+	}
+}
+
+// migrate status and --dry-run both read Status; a contract-registered
+// migration has to appear there under its app code exactly like a
+// host-registered one, both before and after it is applied.
+func TestMergedEntriesStatusIncludesContractRegisteredMigrations(t *testing.T) {
+	reg := withContractRegistry(t)
+	db := newTestDB(t)
+	m := newMigration()
+	m.SetDb(db)
+
+	reg.ForApp("order").SetVersion("1793800000000", func(db *gorm.DB, version, appCode string) error {
+		return recordFor(db, version, appCode)
+	})
+
+	entries, err := m.Status()
+	if err != nil {
+		t.Fatal(err)
+	}
+	byVersion := map[string]StatusEntry{}
+	for _, e := range entries {
+		byVersion[e.Version] = e
+	}
+	e, ok := byVersion["order-1793800000000"]
+	if !ok || !e.Registered || e.Applied || e.AppCode != "order" {
+		t.Fatalf("pending contract entry = %+v (ok=%v)", e, ok)
+	}
+
+	m.Migrate()
+
+	entries, err = m.Status()
+	if err != nil {
+		t.Fatal(err)
+	}
+	byVersion = map[string]StatusEntry{}
+	for _, e := range entries {
+		byVersion[e.Version] = e
+	}
+	if e := byVersion["order-1793800000000"]; !e.Applied {
+		t.Errorf("applied contract entry = %+v", e)
+	}
+}
+
+// AppCodes feeds both --app's typo detection (appRegistrationError) and the
+// group headings status prints; a contract-registered app has to appear
+// there or a real "go-admin migrate --app order" would be told the app does
+// not exist.
+func TestMergedEntriesAppCodesIncludesContractRegisteredApps(t *testing.T) {
+	reg := withContractRegistry(t)
+	m := newMigration()
+	m.SetVersion("1786700009000", func(db *gorm.DB, version string) error { return nil })
+	reg.ForApp("order").SetVersion("1793800000000", func(db *gorm.DB, version, appCode string) error { return nil })
+
+	got := m.AppCodes()
+	want := []string{"core", "order"}
+	if len(got) != len(want) {
+		t.Fatalf("AppCodes = %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("AppCodes = %v, want %v", got, want)
+		}
+	}
+}
+
+// --app order has to actually run only order's migrations - the same
+// per-app isolation MigrateApp already gives host-registered apps - even
+// though order is registered in a different registry entirely.
+func TestMergedEntriesMigrateAppRunsOnlyThatContractApp(t *testing.T) {
+	reg := withContractRegistry(t)
+	db := newTestDB(t)
+	m := newMigration()
+	m.SetDb(db)
+
+	ran := map[string]bool{}
+	m.SetVersion("1786700009000", func(db *gorm.DB, version string) error {
+		ran["core"] = true
+		return db.Create(&common.Migration{Version: version}).Error
+	})
+	reg.ForApp("order").SetVersion("1793800000000", func(db *gorm.DB, version, appCode string) error {
+		ran["order"] = true
+		return recordFor(db, version, appCode)
+	})
+
+	m.MigrateApp("order")
+
+	if !ran["order"] {
+		t.Error("order did not run")
+	}
+	if ran["core"] {
+		t.Errorf("MigrateApp(order) also ran %v", ran)
+	}
+}
+
+// A host-registered key is not supposed to collide with a namespaced
+// contract key (see mergedEntries' doc comment), but if it somehow did, the
+// host's own registration must win rather than a third-party application
+// silently overwriting a framework migration under the same key.
+func TestMergedEntriesHostRegistrationWinsOnKeyCollision(t *testing.T) {
+	reg := withContractRegistry(t)
+	db := newTestDB(t)
+	m := newMigration()
+	m.SetDb(db)
+
+	hostRan, contractRan := false, false
+	m.ForApp("dup").SetVersion("1786800001000", func(db *gorm.DB, version, appCode string) error {
+		hostRan = true
+		return recordFor(db, version, appCode)
+	})
+	reg.ForApp("dup").SetVersion("1786800001000", func(db *gorm.DB, version, appCode string) error {
+		contractRan = true
+		return recordFor(db, version, appCode)
+	})
+
+	m.Migrate()
+
+	if !hostRan {
+		t.Error("host registration did not run")
+	}
+	if contractRan {
+		t.Error("contract registration ran; host registration should have won the collision")
+	}
+}
+
+// GetFilename must stay the same rule the contract package applies, since an
+// application registering through contract/migration names its files by that
+// convention and has to land on the same version string. Pinning the reject
+// case is what catches a re-divergence: a local copy that only sliced would
+// return "add_orders.go" here and register a migration under a key that never
+// matches anything.
+func TestGetFilenameDelegatesToTheContractRule(t *testing.T) {
+	if got := GetFilename("version/1786700001000_demo_menu.go"); got != "1786700001000" {
+		t.Fatalf("GetFilename = %q, want %q", got, "1786700001000")
+	}
+
+	defer func() {
+		if recover() == nil {
+			t.Fatal("a file name carrying no version did not panic")
+		}
+	}()
+	GetFilename("version/add_orders.go")
+}

cmd/migrate/migration/version/1786700006000_app_code_columns.go

@@ -0,0 +1,46 @@
+package version
+
+import (
+	"runtime"
+
+	"gorm.io/gorm"
+
+	adminmodels "go-admin/app/admin/models"
+	"go-admin/cmd/migrate/migration"
+	common "go-admin/common/models"
+)
+
+// Add sys_menu.app_code and sys_api.app_code ahead of PRD 006 F9's Seeder.
+//
+// Every row a third-party application's migration writes through
+// seed.SeedMenus must be attributable to the app that wrote it, so
+// installing, auditing, or removing one application does not require
+// guessing which rows belong to it - see go-admin-core's docs/contract.md,
+// "Application-supplied menu and API entries", for the requirement this
+// satisfies.
+//
+// Ordered after 1786700003000, so importing cmd/migrate/migration/models is
+// banned here (see schema_coverage_test.go's
+// TestPostConversionMigrationsAvoidFrozenSeedModels): AddColumn instead
+// reads the runtime models' own gorm tags directly, which is also what
+// makes the column this adds match the one the admin Seeder writes through
+// those same structs.
+func init() {
+	_, fileName, _, _ := runtime.Caller(0)
+	migration.Migrate.SetVersion(migration.GetFilename(fileName), _1786700006000AppCodeColumns)
+}
+
+func _1786700006000AppCodeColumns(db *gorm.DB, version string) error {
+	m := db.Migrator()
+	if !m.HasColumn(&adminmodels.SysMenu{}, "AppCode") {
+		if err := m.AddColumn(&adminmodels.SysMenu{}, "AppCode"); err != nil {
+			return err
+		}
+	}
+	if !m.HasColumn(&adminmodels.SysApi{}, "AppCode") {
+		if err := m.AddColumn(&adminmodels.SysApi{}, "AppCode"); err != nil {
+			return err
+		}
+	}
+	return db.Create(&common.Migration{Version: version}).Error
+}

common/health/health.go

@@ -0,0 +1,177 @@
+// Package health answers whether this process should be sent traffic.
+//
+// The two questions an orchestrator asks are not the same one, and go-admin
+// answers them at two endpoints:
+//
+//   - /health is liveness: is the process there at all. It stays a bare 200,
+//     because the honest answer to "should I restart you" is almost always no.
+//     Restarting a process because its database is unreachable turns one
+//     outage into a crash loop that also loses the connection pool, the cache
+//     and every in-flight request.
+//   - /ready is readiness: should this instance receive requests now. It fails
+//     while the dependencies are unreachable, and - the part that only exists
+//     because of the life-cycle phases - it fails as soon as shutdown begins,
+//     before the server stops accepting.
+//
+// # What the draining answer is worth
+//
+// Order alone does not produce a window. Answering before the server stops
+// accepting is the right order - the reverse reports the state after the
+// connections are already cut - but with nothing between the two they are
+// microseconds apart, and a poller on a multi-second interval never sees the
+// 503.
+//
+// The delay between them is extend.shutdown.drain, which is zero unless it is
+// configured. On the shipped defaults this is therefore still an answer that
+// can be read rather than one anything acts on; a deployment that sets a drain
+// window is the one that gets a window to act in.
+//
+// What acts on it depends on who does the removing. A load balancer that polls
+// /ready takes this instance out when it reads the 503, and the window has to
+// cover its check interval times its failure threshold, plus however long the
+// removal takes to apply. On Kubernetes the endpoint is withdrawn when the Pod
+// receives a deletionTimestamp, concurrently with SIGTERM and regardless of
+// what the probe returns - there the window covers the delay in that removal
+// reaching every node, and the 503 is what makes the state observable.
+package health
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+)
+
+// draining is set when the process starts shutting down.
+//
+// It is kept here rather than read back from core: BeginShutdown sets a flag on
+// the Application, but nothing exports it, and one host wanting to know is not
+// yet a reason to widen that interface.
+var draining atomic.Bool
+
+// BeginDraining records that shutdown has started, so readiness fails from now
+// on. It is called with BeginShutdown, before anything is taken apart.
+func BeginDraining() { draining.Store(true) }
+
+// Draining reports whether shutdown has begun.
+func Draining() bool { return draining.Load() }
+
+// Check is one dependency and what asking it produced.
+type Check struct {
+	Name string `json:"name"`
+	OK   bool   `json:"ok"`
+	Err  string `json:"error,omitempty"`
+}
+
+// Ready asks every dependency this process cannot serve a request without.
+//
+// The queue is deliberately absent. Nothing on AdapterQueue answers "are you
+// reachable" without publishing something, the memory backend cannot fail, and
+// a queue that is down degrades logging rather than stopping requests - which
+// is a reason to alert, not a reason to leave the load balancer pool.
+func Ready(ctx context.Context) []Check {
+	return []Check{
+		safely("database", func() error { return pingDB(ctx) }),
+		safely("cache", probeCache),
+	}
+}
+
+// safely turns a panic into a failed check.
+//
+// Not defensive habit: the accessors hand back wrappers, not the resources.
+// sdk.Runtime.GetCacheAdapter builds a runtime.Cache around whatever is
+// configured and returns it even when nothing is - so the value is not nil, the
+// cache inside it is, and the first call dereferences it. A nil check cannot
+// see that, and the same is true of GetQueueAdapter.
+//
+// Whatever the reason, a probe is the last thing that should be able to take
+// the process down: the caller is asking whether this instance is well, and
+// killing it to answer is the wrong reply.
+func safely(name string, fn func() error) (c Check) {
+	c = Check{Name: name}
+	defer func() {
+		if r := recover(); r != nil {
+			c.OK, c.Err = false, fmt.Sprintf("the check panicked: %v", r)
+		}
+	}()
+	if err := fn(); err != nil {
+		c.Err = err.Error()
+		return c
+	}
+	c.OK = true
+	return c
+}
+
+// Healthy reports whether every check passed.
+func Healthy(checks []Check) bool {
+	for _, c := range checks {
+		if !c.OK {
+			return false
+		}
+	}
+	return true
+}
+
+func pingDB(ctx context.Context) error {
+	db := sdk.Runtime.GetDb()
+	if db == nil {
+		return errors.New("no database configured")
+	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		return err
+	}
+	return sqlDB.PingContext(ctx)
+}
+
+// cacheProbePrefix names the probe's keys. The key itself is per probe, not
+// fixed: two /ready requests arriving together - or two instances sharing one
+// redis, which is the normal deployment - would otherwise overwrite each
+// other's value between the write and the read and each conclude the cache was
+// broken. A readiness probe that reports false negatives under load takes
+// healthy instances out of the pool, which is worse than not probing.
+const cacheProbePrefix = "go-admin:health:"
+
+// cacheProbeTTL is short because these keys are write-once and never read
+// again by anyone else; it only has to outlive the read that follows.
+const cacheProbeTTL = 30
+
+func probeCache() error {
+	adapter := sdk.Runtime.GetCacheAdapter()
+	if adapter == nil {
+		return errors.New("no cache configured")
+	}
+
+	suffix := make([]byte, 8)
+	if _, err := rand.Read(suffix); err != nil {
+		return fmt.Errorf("could not build a probe key: %w", err)
+	}
+	key := cacheProbePrefix + hex.EncodeToString(suffix)
+
+	// Written and read back rather than only read: a cache that answers "miss"
+	// for every key - a client pointed at the wrong server - is
+	// indistinguishable from a healthy one on a read alone.
+	want := time.Now().Format(time.RFC3339Nano)
+	if err := adapter.Set(key, want, cacheProbeTTL); err != nil {
+		return err
+	}
+	// Best effort, and its error is deliberately dropped: the verdict is
+	// already decided by the read below, and a cache that cannot delete a key
+	// it just wrote is not a reason to refuse traffic. The TTL is the real
+	// cleanup.
+	defer func() { _ = adapter.Del(key) }()
+
+	got, err := adapter.Get(key)
+	if err != nil {
+		return err
+	}
+	if got != want {
+		return errors.New("the cache returned a different value than was written")
+	}
+	return nil
+}

common/health/health_test.go

@@ -0,0 +1,244 @@
+package health
+
+import (
+	"context"
+	"errors"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+	corestorage "github.com/go-admin-team/go-admin-core/v2/storage"
+)
+
+func freshRuntime(t *testing.T) {
+	t.Helper()
+	previous := sdk.Runtime
+	t.Cleanup(func() { sdk.Runtime = previous })
+	sdk.Runtime = runtime.NewConfig()
+}
+
+// fakeCache answers whatever the test needs it to.
+type fakeCache struct {
+	mu      sync.Mutex
+	setErr  error
+	getErr  error
+	getBack string // returned instead of what was written, when non-empty
+	stored  map[string]string
+
+	// oneSlot makes the cache keep a single value however many keys are
+	// written, which is what a shared probe key turns any cache into.
+	oneSlot bool
+	slot    string
+
+	// setBarrier, when set, holds every writer until all of them have written.
+	// Without it the probes are short enough that the scheduler usually runs
+	// them one after another, and a shared key survives by luck rather than by
+	// design - which would leave the test below asserting nothing.
+	setBarrier *barrier
+}
+
+// barrier releases every waiter once n of them have arrived.
+type barrier struct {
+	n   int
+	mu  sync.Mutex
+	got int
+	ch  chan struct{}
+}
+
+func newBarrier(n int) *barrier { return &barrier{n: n, ch: make(chan struct{})} }
+
+func (b *barrier) wait() {
+	b.mu.Lock()
+	b.got++
+	if b.got == b.n {
+		close(b.ch)
+	}
+	b.mu.Unlock()
+	<-b.ch
+}
+
+func (c *fakeCache) String() string { return "fake" }
+
+func (c *fakeCache) Set(key string, val interface{}, _ int) error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.setErr != nil {
+		return c.setErr
+	}
+	v, _ := val.(string)
+	if c.oneSlot {
+		c.slot = v
+		return nil
+	}
+	if c.stored == nil {
+		c.stored = map[string]string{}
+	}
+	c.stored[key] = v
+	c.mu.Unlock()
+	if c.setBarrier != nil {
+		// Outside the lock on purpose: waiting while holding it would deadlock
+		// every other writer before the barrier could fill.
+		c.setBarrier.wait()
+	}
+	c.mu.Lock()
+	return nil
+}
+
+func (c *fakeCache) Get(key string) (string, error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.getErr != nil {
+		return "", c.getErr
+	}
+	if c.getBack != "" {
+		return c.getBack, nil
+	}
+	if c.oneSlot {
+		return c.slot, nil
+	}
+	return c.stored[key], nil
+}
+
+func (c *fakeCache) Del(key string) error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	delete(c.stored, key)
+	return nil
+}
+
+func (c *fakeCache) HashGet(_, _ string) (string, error) { return "", nil }
+func (c *fakeCache) HashDel(_, _ string) error           { return nil }
+func (c *fakeCache) Increase(string) error               { return nil }
+func (c *fakeCache) Decrease(string) error               { return nil }
+func (c *fakeCache) Expire(string, time.Duration) error  { return nil }
+
+var _ corestorage.AdapterCache = (*fakeCache)(nil)
+
+func named(checks []Check, name string) Check {
+	for _, c := range checks {
+		if c.Name == name {
+			return c
+		}
+	}
+	return Check{Name: name, Err: "check not reported at all"}
+}
+
+// A cache that accepts writes and answers every read with a different value is
+// the failure this probe exists for - a client pointed at the wrong server, or
+// one that silently drops everything. A read alone cannot tell that apart from
+// a healthy cache with a cold key, which is why the probe writes first.
+func TestCacheProbeFailsWhenTheValueDoesNotComeBack(t *testing.T) {
+	freshRuntime(t)
+	sdk.Runtime.SetCacheAdapter(&fakeCache{getBack: "something else"})
+
+	got := named(Ready(context.Background()), "cache")
+	if got.OK {
+		t.Error("the cache check passed although the value written was not the value read back")
+	}
+	if got.Err == "" {
+		t.Error("the failing check reported no reason")
+	}
+}
+
+func TestCacheProbePassesWhenTheValueComesBack(t *testing.T) {
+	freshRuntime(t)
+	sdk.Runtime.SetCacheAdapter(&fakeCache{})
+
+	if got := named(Ready(context.Background()), "cache"); !got.OK {
+		t.Errorf("the cache check failed for a cache that works: %s", got.Err)
+	}
+}
+
+func TestCacheProbeReportsAWriteFailure(t *testing.T) {
+	freshRuntime(t)
+	sdk.Runtime.SetCacheAdapter(&fakeCache{setErr: errors.New("connection refused")})
+
+	got := named(Ready(context.Background()), "cache")
+	if got.OK {
+		t.Error("the cache check passed although the write failed")
+	}
+}
+
+// Nothing configured is the case that used to take the process down rather
+// than answer. GetCacheAdapter builds a wrapper around whatever is configured
+// and returns it even when nothing is, so the value is not nil, the cache
+// inside it is, and Set dereferences it - a probe that panics is the worst
+// possible answer to "are you well".
+//
+// Every check has to be reported, passing or not. A probe that omits what it
+// could not reach reads as a shorter list of healthy things.
+func TestEveryDependencyIsReportedEvenWithNothingConfigured(t *testing.T) {
+	freshRuntime(t)
+
+	checks := Ready(context.Background())
+	for _, name := range []string{"database", "cache"} {
+		c := named(checks, name)
+		if c.Err == "check not reported at all" {
+			t.Errorf("%s was not reported", name)
+		}
+		if c.OK {
+			t.Errorf("%s passed with nothing configured", name)
+		}
+	}
+	if Healthy(checks) {
+		t.Error("Healthy said yes for a process with no database and no cache")
+	}
+}
+
+// BeginDraining sets the flag and Draining reports it, before anything else is
+// taken apart. That is the whole of what can be checked from inside the
+// process: whether anyone outside gets to read it depends on
+// extend.shutdown.drain, which is zero unless it is configured, and on who is
+// routing traffic here - the package comment has both. The subprocess tests in
+// cmd/api are where a reader on the other end of a socket sees the 503.
+func TestDrainingIsObservableOnceItBegins(t *testing.T) {
+	previous := draining.Load()
+	t.Cleanup(func() { draining.Store(previous) })
+
+	draining.Store(false)
+	if Draining() {
+		t.Fatal("Draining reported true before shutdown began")
+	}
+	BeginDraining()
+	if !Draining() {
+		t.Error("Draining still reported false after BeginDraining")
+	}
+}
+
+// Two probes at once must both pass. With one fixed key they overwrite each
+// other's value between the write and the read, and a readiness probe that
+// reports false negatives under load takes healthy instances out of the pool -
+// which is worse than not probing at all.
+func TestConcurrentProbesDoNotOverwriteEachOther(t *testing.T) {
+	freshRuntime(t)
+	const probes = 16
+	sdk.Runtime.SetCacheAdapter(&fakeCache{setBarrier: newBarrier(probes)})
+
+	var wg sync.WaitGroup
+	failures := make(chan string, probes)
+	for i := 0; i < probes; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			if c := named(Ready(context.Background()), "cache"); !c.OK {
+				failures <- c.Err
+			}
+		}()
+	}
+	wg.Wait()
+	close(failures)
+
+	var n int
+	var first string
+	for err := range failures {
+		if n == 0 {
+			first = err
+		}
+		n++
+	}
+	if n > 0 {
+		t.Errorf("%d of %d concurrent probes called a healthy cache broken; first: %s", n, probes, first)
+	}
+}

common/middleware/auth.go

@@ -3,11 +3,19 @@ package middleware
 import (
 	"time"
 
-	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
 	jwt "github.com/go-admin-team/go-admin-core/v2/jwtauth"
+	log "github.com/go-admin-team/go-admin-core/v2/logger"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
 	"go-admin/common/middleware/handler"
 )
 
+// authMiddleware is the single JWT middleware instance the whole process
+// shares. InitMiddleware builds it once, before any module registers its
+// routes; GetAuthMiddleware is how a module gets it back instead of calling
+// AuthInit itself and building another, functionally-equivalent-but-distinct
+// instance.
+var authMiddleware *jwt.GinJWTMiddleware
+
 // AuthInit jwt验证new
 func AuthInit() (*jwt.GinJWTMiddleware, error) {
 	timeout := time.Hour
@@ -33,4 +41,23 @@ func AuthInit() (*jwt.GinJWTMiddleware, error) {
 		TimeFunc:        time.Now,
 	})
 
-}
+}
+
+// GetAuthMiddleware returns the shared JWT middleware instance InitMiddleware
+// built at startup. Application modules (app/admin, app/jobs, app/other,
+// app/demo) call this instead of AuthInit so their router chains - which
+// still need the instance itself for authMiddleware.MiddlewareFunc() and
+// authMiddleware.LoginHandler, not just the bound closure registered under
+// sdk.Runtime's JwtTokenCheck key - end up using the same instance the host
+// registered, rather than one each.
+//
+// It fails loudly instead of returning nil: an InitRouter that runs before
+// InitMiddleware has a real startup-ordering bug, not a case to paper over
+// with a nil *jwt.GinJWTMiddleware that would panic much further down the
+// call chain with a far less useful stack trace.
+func GetAuthMiddleware() *jwt.GinJWTMiddleware {
+	if authMiddleware == nil {
+		log.Fatal("JWT middleware not initialized; InitMiddleware must run before any module's InitRouter")
+	}
+	return authMiddleware
+}

common/middleware/init.go

@@ -2,15 +2,20 @@ package middleware
 
 import (
 	"github.com/gin-gonic/gin"
-	jwt "github.com/go-admin-team/go-admin-core/v2/jwtauth"
+	log "github.com/go-admin-team/go-admin-core/v2/logger"
 	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
 	"go-admin/common/actions"
 )
 
+// These alias core's own constants (see sdk/runtime.GetHandlerFunc's contract
+// doc, section 9) rather than redeclaring the same three strings, so a typo
+// here can no longer split registration and lookup into two different keys
+// that both happen to compile.
 const (
-	JwtTokenCheck   string = "JwtToken"
-	RoleCheck       string = "AuthCheckRole"
-	PermissionCheck string = "PermissionAction"
+	JwtTokenCheck   = runtime.JwtTokenCheck
+	RoleCheck       = runtime.RoleCheck
+	PermissionCheck = runtime.PermissionCheck
 )
 
 func InitMiddleware(r *gin.Engine) {
@@ -29,7 +34,26 @@ func InitMiddleware(r *gin.Engine) {
 	r.Use(Secure)
 	// 链路追踪
 	//r.Use(middleware.Trace())
-	sdk.Runtime.SetMiddleware(JwtTokenCheck, (*jwt.GinJWTMiddleware).MiddlewareFunc)
+
+	// Build the shared JWT middleware instance here, before any module
+	// registers routes (initRouter runs ahead of runStartupHooks, which is
+	// what invokes each module's InitRouter - see cmd/api/server.go). Doing
+	// it once here, instead of once per module via AuthInit, is what makes
+	// GetAuthMiddleware and sdk.Runtime.GetHandlerFunc(JwtTokenCheck) both
+	// resolve to a single, meaningful instance instead of "whichever module
+	// happened to initialize last".
+	//
+	// SetMiddleware must be given a bound closure (authMiddleware.MiddlewareFunc()),
+	// not the unbound method expression (*jwt.GinJWTMiddleware).MiddlewareFunc:
+	// the latter has no receiver bound to it, so GetHandlerFunc's type
+	// assertion to gin.HandlerFunc always fails for it.
+	var err error
+	authMiddleware, err = AuthInit()
+	if err != nil {
+		// A process with no JWT middleware must not start serving requests.
+		log.Fatalf("JWT Init Error, %s", err.Error())
+	}
+	sdk.Runtime.SetMiddleware(JwtTokenCheck, authMiddleware.MiddlewareFunc())
 	sdk.Runtime.SetMiddleware(RoleCheck, AuthCheckRole())
 	sdk.Runtime.SetMiddleware(PermissionCheck, actions.PermissionAction())
 }

common/middleware/init_test.go

@@ -0,0 +1,77 @@
+package middleware
+
+import (
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+)
+
+// freshRuntime hands the test its own Runtime and puts the old one back, the
+// same pattern cmd/api/server_test.go uses: sdk.Runtime is a process-wide
+// singleton, and a test that registers into it would otherwise leak state
+// into every other test in the binary.
+func freshRuntime(t *testing.T) {
+	t.Helper()
+	previous := sdk.Runtime
+	t.Cleanup(func() { sdk.Runtime = previous })
+	sdk.Runtime = runtime.NewConfig()
+}
+
+// TestInitMiddlewareRegistersUsableJwtHandlerFunc is the reverse proof for
+// hoisting the JWT instance's construction into InitMiddleware:
+// sdk.Runtime.GetHandlerFunc(JwtTokenCheck) must hand back ok=true and a
+// non-nil gin.HandlerFunc, not just something GetMiddleware can return as an
+// untyped interface{}.
+//
+// Before this change, InitMiddleware registered the unbound method
+// expression (*jwt.GinJWTMiddleware).MiddlewareFunc under this key - a value
+// with no receiver bound to it, which is not a gin.HandlerFunc no matter how
+// a caller asserts its type. Reverting the registration below to that
+// expression makes GetHandlerFunc report ok=false; it does not fail to
+// compile, because (*jwt.GinJWTMiddleware).MiddlewareFunc has a well-formed,
+// unrelated method-expression type that SetMiddleware's interface{} param
+// happily accepts.
+func TestInitMiddlewareRegistersUsableJwtHandlerFunc(t *testing.T) {
+	freshRuntime(t)
+
+	previousSecret := config.JwtConfig.Secret
+	config.JwtConfig.Secret = "test-secret-key"
+	t.Cleanup(func() { config.JwtConfig.Secret = previousSecret })
+
+	gin.SetMode(gin.TestMode)
+	InitMiddleware(gin.New())
+
+	h, ok := sdk.Runtime.GetHandlerFunc(JwtTokenCheck)
+	if !ok {
+		t.Fatal("GetHandlerFunc(JwtTokenCheck) reported ok=false after InitMiddleware ran")
+	}
+	if h == nil {
+		t.Fatal("GetHandlerFunc(JwtTokenCheck) reported ok=true but returned a nil handler")
+	}
+}
+
+// TestInitMiddlewareBuildsOneSharedJwtInstance locks down the fix for the
+// four-instances problem: GetAuthMiddleware must return the very instance
+// InitMiddleware built and handed to sdk.Runtime, not a lookalike built
+// separately by whichever caller asks first.
+func TestInitMiddlewareBuildsOneSharedJwtInstance(t *testing.T) {
+	freshRuntime(t)
+
+	previousSecret := config.JwtConfig.Secret
+	config.JwtConfig.Secret = "test-secret-key"
+	t.Cleanup(func() { config.JwtConfig.Secret = previousSecret })
+
+	gin.SetMode(gin.TestMode)
+	InitMiddleware(gin.New())
+
+	shared := GetAuthMiddleware()
+	if shared == nil {
+		t.Fatal("GetAuthMiddleware returned nil after InitMiddleware ran")
+	}
+	if shared != authMiddleware {
+		t.Error("GetAuthMiddleware did not return the package-level instance InitMiddleware built")
+	}
+}

common/middleware/settings.go

@@ -34,6 +34,7 @@ var CasbinExclude = []UrlInfo{
 	{Url: "/api/v1/user/pwd", Method: "PUT"},
 	{Url: "/api/v1/metrics", Method: "GET"},
 	{Url: "/api/v1/health", Method: "GET"},
+	{Url: "/api/v1/ready", Method: "GET"},
 	{Url: "/", Method: "GET"},
 	{Url: "/api/v1/server-monitor", Method: "GET"},
 	{Url: "/api/v1/public/uploadFile", Method: "POST"},

common/storage/initialize.go

@@ -9,10 +9,11 @@ package storage
 
 import (
 	"log"
+	"sync"
 
+	"github.com/go-admin-team/go-admin-core/v2/captcha"
 	"github.com/go-admin-team/go-admin-core/v2/sdk"
 	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
-	"github.com/go-admin-team/go-admin-core/v2/captcha"
 )
 
 // Setup 配置storage组件
@@ -34,17 +35,75 @@ func setupCaptcha() {
 	captcha.SetStore(captcha.NewCacheStore(sdk.Runtime.GetCacheAdapter(), 600))
 }
 
+var (
+	queueMu sync.Mutex
+	// installed is the adapter setupQueue built, kept so the next reload can
+	// shut it down, and counted so a consumer can tell one from the next.
+	installed    interface{ Shutdown() }
+	installedGen uint64
+)
+
+// QueueGeneration reports how many times this package has installed a queue
+// adapter. It changes every time setupQueue builds a new one, which is on
+// every configuration reload, and stays 0 for as long as the configuration has
+// no queue section at all - in which case nothing is installed and callers are
+// working with the runtime's own fallback queue.
+//
+// It exists because there is no way to ask for the adapter's identity from the
+// outside. sdk.Runtime.GetQueueAdapter and GetQueuePrefix build a fresh
+// runtime.Queue wrapper on every call, so comparing what two calls return
+// compares two wrappers and never matches, however many times the underlying
+// adapter has been replaced. This package creates the adapter, so this is the
+// only place that knows. A counter rather than the adapter itself keeps the
+// comparison on a uint64: an adapter type that is not comparable would panic
+// an `==` between two interface values.
+func QueueGeneration() uint64 {
+	queueMu.Lock()
+	defer queueMu.Unlock()
+	return installedGen
+}
+
 func setupQueue() {
 	if config.QueueConfig.Empty() {
 		return
 	}
-	if q := sdk.Runtime.GetQueueAdapter(); q != nil {
-		q.Shutdown()
-	}
+
+	queueMu.Lock()
+	defer queueMu.Unlock()
+
 	queueAdapter, err := config.QueueConfig.Setup()
 	if err != nil {
 		log.Fatalf("queue setup error, %s\n", err.Error())
 	}
+
+	previous := installed
 	sdk.Runtime.SetQueueAdapter(queueAdapter)
-	go queueAdapter.Run()
+	installed = queueAdapter
+	installedGen++
+
+	// The previous adapter goes down after the new one is installed, not
+	// before. Shutdown waits for its consumers to deliver what it still holds,
+	// and for that whole wait the runtime would otherwise be handing producers
+	// a queue that has stopped accepting: every Append in the window comes back
+	// ErrQueueClosed, and both call sites in common/middleware log it. Swapping
+	// first leaves no such window - a producer gets the new queue or the old
+	// one, and both work.
+	//
+	// Only an adapter this package installed. GetQueueAdapter never returns
+	// nil - with nothing configured the runtime falls back to its own memory
+	// queue and wraps that - so the `if q := GetQueueAdapter(); q != nil` this
+	// replaces was always true, and shut down the fallback queue on the very
+	// first start, before anything had used it.
+	if previous != nil {
+		previous.Shutdown()
+	}
+
+	// Deliberately not started here. Run has to come after the consumers have
+	// registered: the contract implementations refuse a registration once the
+	// queue is running (storage.ErrQueueAlreadyStarted), and the legacy
+	// adapter this repository still goes through swallows that error rather
+	// than reporting it - its own comment says the interface gives it no way
+	// to tell the caller. Starting here and registering afterwards is
+	// therefore a race that loses consumers in silence. Whoever registers is
+	// the one that starts it.
 }

common/storage/queue_redis_test.go

@@ -0,0 +1,130 @@
+package storage
+
+import (
+	"errors"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	corestorage "github.com/go-admin-team/go-admin-core/v2/storage"
+	"github.com/go-admin-team/go-admin-core/v2/storage/queue"
+)
+
+// redisAddrEnv points these tests at a server. They are skipped without it, so
+// a developer with no redis running still gets a green run - and CI sets it,
+// which is the point: the ordering rule they cover is invisible on the memory
+// backend, and memory is the default. A suite that only ever exercised the
+// default would report success for a queue that silently drops every consumer.
+const redisAddrEnv = "GO_ADMIN_TEST_REDIS_ADDR"
+
+func redisAddr(t *testing.T) string {
+	t.Helper()
+	addr := os.Getenv(redisAddrEnv)
+	if addr != "" {
+		return addr
+	}
+	// Skipping locally is the point; skipping in CI is the failure this whole
+	// file exists to prevent. A workflow that renamed the variable, or dropped
+	// the service, would otherwise go green while these two tests quietly did
+	// nothing - which is the same shape as the defect they cover.
+	if os.Getenv("CI") != "" {
+		t.Fatalf("%s is not set while CI is: the redis-backed queue tests must not skip here", redisAddrEnv)
+	}
+	t.Skipf("%s is not set; skipping the redis-backed queue tests", redisAddrEnv)
+	return ""
+}
+
+// newRedisQueue builds the queue the same way setupQueue does - through
+// config.QueueConfig.Setup - so that what is under test is the adapter this
+// repository actually gets, LegacyQueueAdapter and all, rather than a redis
+// client wired up by the test.
+func newRedisQueue(t *testing.T, prefix string) corestorage.AdapterQueue {
+	t.Helper()
+	previous := config.QueueConfig
+	t.Cleanup(func() { config.QueueConfig = previous })
+
+	config.QueueConfig = &config.Queue{
+		Redis: &config.RedisQueue{
+			RedisOptions: config.RedisOptions{Addr: redisAddr(t)},
+			Group:        prefix,
+			KeyPrefix:    prefix,
+		},
+	}
+	q, err := config.QueueConfig.Setup()
+	if err != nil {
+		t.Fatalf("queue setup: %v", err)
+	}
+	t.Cleanup(q.Shutdown)
+	return q
+}
+
+func message(t *testing.T, stream string) corestorage.Messager {
+	t.Helper()
+	m := &queue.Message{}
+	m.SetStream(stream)
+	m.SetValues(map[string]interface{}{"hello": "world"})
+	return m
+}
+
+// Registered first, then started: the consumer gets the message. This is the
+// order setupQueue and attachQueueConsumers now produce between them.
+func TestRedisQueueDeliversToAConsumerRegisteredBeforeTheStart(t *testing.T) {
+	stream := "t-ordered"
+	q := newRedisQueue(t, "gotest-ordered")
+
+	got := make(chan struct{}, 1)
+	q.Register(stream, func(corestorage.Messager) error {
+		select {
+		case got <- struct{}{}:
+		default:
+		}
+		return nil
+	})
+	go q.Run()
+
+	// Give Start a moment to reach its read loop before publishing.
+	time.Sleep(500 * time.Millisecond)
+	if err := q.Append(message(t, stream)); err != nil {
+		t.Fatalf("append: %v", err)
+	}
+
+	select {
+	case <-got:
+	case <-time.After(15 * time.Second):
+		t.Fatal("the consumer never received the message")
+	}
+}
+
+// Started first, then registered: the registration is refused and every
+// publish afterwards fails.
+//
+// Subscribe answers ErrQueueAlreadyStarted, and LegacyQueueAdapter.Register
+// returns nothing, so the caller cannot know - that part is silent. What is not
+// silent is the consequence: no consumer group was created, so Publish refuses
+// the topic with ErrNoHandler on every single request, and go-admin's call
+// sites log that at error level while the login and operation log rows are
+// never written.
+//
+// This is the test the memory backend cannot provide. queue.Memory's Register
+// starts another consumer goroutine whatever the state, so the same code passes
+// there - which is how the defect survived, memory being the default.
+func TestRedisQueueRefusesAConsumerRegisteredAfterTheStart(t *testing.T) {
+	stream := "t-late"
+	q := newRedisQueue(t, "gotest-late")
+
+	go q.Run()
+	time.Sleep(500 * time.Millisecond)
+
+	q.Register(stream, func(corestorage.Messager) error { return nil })
+
+	err := q.Append(message(t, stream))
+	if err == nil {
+		t.Fatal("a message was accepted for a topic whose registration came after Start; " +
+			"if the backend now accepts late registration, the ordering rule in setupQueue can be revisited")
+	}
+	if !errors.Is(err, corestorage.ErrNoHandler) {
+		t.Fatalf("append failed with %v, want %v - the test is meant to pin the "+
+			"missing-consumer path, not any error at all", err, corestorage.ErrNoHandler)
+	}
+}

common/storage/queue_swap_test.go

@@ -0,0 +1,161 @@
+package storage
+
+import (
+	"errors"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+	corestorage "github.com/go-admin-team/go-admin-core/v2/storage"
+	"github.com/go-admin-team/go-admin-core/v2/storage/queue"
+)
+
+// sampleSize is how many publishes have to land inside the reload before the
+// measurement is taken. Waiting on the count rather than on wall clock keeps
+// the window the test covers the same on a loaded runner as on an idle one.
+const sampleSize = 200
+
+func swapMsg() corestorage.Messager {
+	m := new(queue.Message)
+	m.SetStream("t")
+	m.SetValues(map[string]interface{}{"a": "b"})
+	return m
+}
+
+// A reload must never leave producers holding a queue that has stopped
+// accepting.
+//
+// Shutdown waits for its consumers to deliver what the queue still holds. Taking
+// the old adapter down before installing the new one meant the runtime pointed
+// at a closed queue for that entire wait: every Append in the window came back
+// ErrQueueClosed, and both call sites in common/middleware log it at error
+// level. Installing first leaves no window - a producer gets the new queue or
+// the old one, and both accept.
+//
+// The difference is only visible during that wait, which is why the test holds
+// a consumer rather than checking the state after Setup has returned: by then
+// the two orders look identical.
+//
+// One refusal survives the fix and is not something this ordering can reach.
+// GetQueuePrefix hands back a wrapper that captured the adapter, so a producer
+// that fetched before the swap and appends after Shutdown has begun is still
+// holding the old one. That window is one call wide and closing it means
+// resolving the adapter inside Append, which is core's to change. What the
+// ordering removes is the sustained window: every producer that fetches during
+// the wait. The test publishes from a single goroutine, so at most one of its
+// calls can straddle the swap - which is what makes "more than one" the line
+// between the two orders rather than a tolerance.
+func TestAReloadNeverPointsProducersAtAClosedQueue(t *testing.T) {
+	prevQ, prevC := config.QueueConfig, config.CacheConfig
+	prevRuntime := sdk.Runtime
+	prevInstalled, prevGen := installed, installedGen
+	t.Cleanup(func() {
+		config.QueueConfig, config.CacheConfig = prevQ, prevC
+		sdk.Runtime = prevRuntime
+		queueMu.Lock()
+		installed, installedGen = prevInstalled, prevGen
+		queueMu.Unlock()
+	})
+	sdk.Runtime = runtime.NewConfig()
+	config.CacheConfig = &config.Cache{Memory: struct{}{}}
+	// Sized so the buffer cannot fill while the consumer is held: a full queue
+	// returns an error of its own, and this test needs every error other than
+	// ErrQueueClosed to mean something it does not model has happened.
+	config.QueueConfig = &config.Queue{Memory: &config.QueueMemory{PoolSize: 4096}}
+
+	Setup()
+
+	// A consumer that will not finish until this test lets it, so the reload's
+	// Shutdown has something to wait for.
+	release := make(chan struct{})
+	consuming := make(chan struct{})
+	var picked sync.Once
+	first := sdk.Runtime.GetQueuePrefix("")
+	first.Register("t", func(corestorage.Messager) error {
+		picked.Do(func() { close(consuming) })
+		<-release
+		return nil
+	})
+	go first.Run()
+	for i := 0; i < 4; i++ {
+		if err := first.Append(swapMsg()); err != nil {
+			t.Fatalf("seed append %d: %v", i, err)
+		}
+	}
+	select {
+	case <-consuming:
+	case <-time.After(10 * time.Second):
+		t.Fatal("the consumer never picked a message up, so the reload has nothing to wait for")
+	}
+
+	reloaded := make(chan struct{})
+	go func() { Setup(); close(reloaded) }()
+
+	// Publish continuously while the reload is in progress.
+	var refused atomic.Int64
+	var attempts atomic.Int64
+	unexpected := make(chan error, 1)
+	stop := make(chan struct{})
+	// publishing is closed by the producer on its way out. The test joins on it
+	// before returning: t.Cleanup restores sdk.Runtime, and a producer still in
+	// flight would be reading the variable that restore writes.
+	publishing := make(chan struct{})
+	go func() {
+		defer close(publishing)
+		for {
+			select {
+			case <-stop:
+				return
+			default:
+			}
+			attempts.Add(1)
+			err := sdk.Runtime.GetQueuePrefix("").Append(swapMsg())
+			switch {
+			case err == nil:
+			case errors.Is(err, corestorage.ErrQueueClosed):
+				refused.Add(1)
+			default:
+				// Kept rather than counted: an Append refused for some other
+				// reason would otherwise leave refused at zero and the test
+				// green while nothing was reaching a queue at all.
+				select {
+				case unexpected <- err:
+				default:
+				}
+			}
+			time.Sleep(time.Millisecond)
+		}
+	}()
+
+	deadline := time.After(30 * time.Second)
+	for attempts.Load() < sampleSize {
+		select {
+		case <-deadline:
+			t.Fatalf("only %d publishes landed inside the reload; the window was never sampled", attempts.Load())
+		case <-time.After(time.Millisecond):
+		}
+	}
+	close(release)
+
+	select {
+	case <-reloaded:
+	case <-time.After(30 * time.Second):
+		t.Fatal("the reload never finished")
+	}
+	close(stop)
+	<-publishing
+
+	select {
+	case err := <-unexpected:
+		t.Fatalf("a publish failed for a reason this test does not model: %v", err)
+	default:
+	}
+	if n := refused.Load(); n > 1 {
+		t.Errorf("%d of %d publishes during the reload were refused: producers were pointed at the closed queue",
+			n, attempts.Load())
+	}
+}

common/storage/setup_gen_test.go

@@ -0,0 +1,53 @@
+package storage
+
+import (
+	"testing"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+)
+
+// Issue #892: a configuration reload replaces the queue adapter and the
+// consumers registered against the previous one are attached to a queue nobody
+// publishes to any more.
+//
+// The fix has two halves. attachQueueConsumers gives a new queue its own
+// consumers and the same queue none, which cmd/api covers against a queue the
+// test controls. This is the other half: that a reload actually produces a new
+// queue for it to notice. Setup is what config re-runs on every change, so
+// calling it twice is what a reload does to this package.
+func TestSetupBumpsTheQueueGenerationOnEveryReload(t *testing.T) {
+	// Setup writes the process-wide sdk.Runtime - the cache and queue adapters -
+	// and this package's own record of what it installed. Restoring all of it
+	// keeps the test from deciding what a later test in this binary sees,
+	// which is the same isolation cmd/api's freshRuntime provides.
+	prevQ, prevC := config.QueueConfig, config.CacheConfig
+	prevRuntime := sdk.Runtime
+	prevInstalled, prevGen := installed, installedGen
+	t.Cleanup(func() {
+		config.QueueConfig, config.CacheConfig = prevQ, prevC
+		sdk.Runtime = prevRuntime
+		queueMu.Lock()
+		installed, installedGen = prevInstalled, prevGen
+		queueMu.Unlock()
+	})
+	sdk.Runtime = runtime.NewConfig()
+
+	config.CacheConfig = &config.Cache{Memory: struct{}{}}
+	config.QueueConfig = &config.Queue{Memory: &config.QueueMemory{PoolSize: 10}}
+
+	before := QueueGeneration()
+	Setup()
+	first := QueueGeneration()
+	Setup()
+	second := QueueGeneration()
+
+	t.Logf("before=%d first=%d second=%d", before, first, second)
+	if first == before {
+		t.Fatal("the first Setup did not install a queue")
+	}
+	if second == first {
+		t.Fatal("a second Setup - which is what a configuration reload does - did not install a new one")
+	}
+}

config/extend.go

@@ -1,5 +1,10 @@
 package config
 
+import (
+	"fmt"
+	"strings"
+)
+
 var ExtConfig Extend
 
 // Extend 扩展配置
@@ -13,6 +18,7 @@ type Extend struct {
 	AMap      AMap // 这里配置对应配置文件的结构即可
 	FileStore FileStore
 	RateLimit RateLimit
+	Shutdown  Shutdown
 }
 
 // DefaultInboundQPS is the limit applied when nothing is configured. It is the
@@ -72,3 +78,133 @@ type ObjectStore struct {
 func (o ObjectStore) Configured() bool {
 	return o.Endpoint != "" && o.AccessKeyID != "" && o.AccessKeySecret != "" && o.BucketName != ""
 }
+
+// Default budgets for a graceful shutdown, in seconds. Each applies to the
+// matching field of extend.shutdown when that field is absent, and together
+// they are what the process spent before the section existed - so a deployment
+// that configures nothing keeps the shutdown it already had.
+//
+// The drain default is zero deliberately. The three budgets are spent one
+// after the other, and once their sum reaches the orchestrator's stop grace
+// period the process is killed part-way through its cleanup callbacks, which
+// is worse than not draining at all. `docker stop` allows ten seconds by
+// default and 5+3 already leaves little room, so a non-zero default here would
+// slow down every existing shutdown to buy something only a load balancer that
+// polls /ready can collect.
+const (
+	DefaultDrainSeconds   = 0
+	DefaultServerSeconds  = 5
+	DefaultCleanupSeconds = 3
+)
+
+// Shutdown is how long a graceful shutdown may spend, stage by stage.
+//
+//	extend:
+//	  shutdown:
+//	    drain: 0
+//	    server: 5
+//	    cleanup: 3
+//	    grace: 30
+//
+// Every field is a pointer for the reason RateLimit.InboundQPS is: nil means
+// "not configured" and takes the default, while a value that was written down
+// is taken literally, zero included. Without that separation `server: 0` - do
+// not wait for in-flight requests, which is a reasonable thing to ask under a
+// very short grace period - could not be said at all, and `drain: 0` would
+// have to mean something different from `server: 0` in the same section.
+type Shutdown struct {
+	// Drain is how long to keep serving normally after a stop signal arrives.
+	// Throughout it /ready answers 503 and keep-alive is switched off, which
+	// is what gives whatever routes traffic here time to stop routing it
+	// before the listener closes. Zero is no window: the readiness flip and
+	// the listener closing are then microseconds apart and nothing observes
+	// the first.
+	//
+	// What the window is worth depends on who does the removing and on what
+	// basis; the package comment in common/health has the two cases, and they
+	// do not want the same value.
+	Drain *int
+	// Server is how long the server waits for in-flight requests once the
+	// listener is closed.
+	Server *int
+	// Cleanup is how long the BeforeExit callbacks get after that.
+	Cleanup *int
+	// Grace is the stop grace period the orchestrator gives this process -
+	// `docker stop --timeout`, or terminationGracePeriodSeconds. Nothing reads
+	// it during a shutdown; it exists so start-up can say whether the budget
+	// fits inside it. Absent means no comparison is made, because the
+	// reference values differ threefold between runtimes and a fixed threshold
+	// would warn about configurations that are correct.
+	Grace *int
+}
+
+// ShutdownBudget is what a shutdown will actually spend, in seconds, after the
+// fallbacks have been applied.
+type ShutdownBudget struct {
+	Drain   int
+	Server  int
+	Cleanup int
+	// Grace is zero when extend.shutdown.grace was not configured.
+	Grace int
+}
+
+// Budget resolves the configured section into the values that will be spent.
+//
+// A negative is refused rather than corrected. A wait cannot be negative, so
+// there is no reading of one to honour, and quietly turning it into zero would
+// be the failure this whole section exists to remove: written down, accepted,
+// and not what happens. It is returned as an error rather than reported here
+// so that the rule can be checked without ending the process.
+func (s Shutdown) Budget() (ShutdownBudget, error) {
+	var negative []string
+	for _, f := range []struct {
+		name  string
+		value *int
+	}{
+		{"drain", s.Drain},
+		{"server", s.Server},
+		{"cleanup", s.Cleanup},
+		{"grace", s.Grace},
+	} {
+		if f.value != nil && *f.value < 0 {
+			negative = append(negative, fmt.Sprintf("%s: %d", f.name, *f.value))
+		}
+	}
+	if len(negative) > 0 {
+		return ShutdownBudget{}, fmt.Errorf(
+			"extend.shutdown was given a negative number of seconds (%s); "+
+				"a wait cannot be negative, and 0 is how to say \"do not wait\"",
+			strings.Join(negative, ", "))
+	}
+
+	return ShutdownBudget{
+		Drain:   budgetSeconds(s.Drain, DefaultDrainSeconds),
+		Server:  budgetSeconds(s.Server, DefaultServerSeconds),
+		Cleanup: budgetSeconds(s.Cleanup, DefaultCleanupSeconds),
+		Grace:   budgetSeconds(s.Grace, 0),
+	}, nil
+}
+
+func budgetSeconds(configured *int, fallback int) int {
+	if configured != nil {
+		return *configured
+	}
+	return fallback
+}
+
+// Total is the whole of the shutdown, since the three stages run one after the
+// other.
+func (b ShutdownBudget) Total() int { return b.Drain + b.Server + b.Cleanup }
+
+// Overrun reports how many seconds have to be found for the budget to fit
+// inside the configured grace period. It is zero when no grace period was
+// configured and when the budget already fits.
+//
+// Fitting means strictly less: the grace period is when SIGKILL is sent, so a
+// budget that ends exactly then leaves the last callback no time to return.
+func (b ShutdownBudget) Overrun() int {
+	if b.Grace <= 0 || b.Total() < b.Grace {
+		return 0
+	}
+	return b.Total() - b.Grace + 1
+}

config/extend_test.go

@@ -1,6 +1,9 @@
 package config
 
-import "testing"
+import (
+	"strings"
+	"testing"
+)
 
 func TestObjectStoreConfigured(t *testing.T) {
 	if (ObjectStore{}).Configured() {
@@ -32,3 +35,166 @@ func TestRateLimitThreshold(t *testing.T) {
 		t.Errorf("configured limit = %v, want %v", got, custom)
 	}
 }
+
+func ptr(v int) *int { return &v }
+
+// The zero-value rule is the same for all four fields, and it is the one the
+// section would otherwise need a paragraph of documentation to survive: nil
+// takes the default, a number that was written down is spent literally. A
+// `server: 0` that quietly became five seconds would be the same class of
+// failure this whole batch is about - configuration accepted and not applied.
+func TestShutdownBudgetFallbacks(t *testing.T) {
+	for _, tc := range []struct {
+		name string
+		in   Shutdown
+		want ShutdownBudget
+	}{
+		{
+			// What an existing settings.yml hits after an upgrade: no
+			// extend.shutdown section at all, and therefore the shutdown it
+			// already had.
+			name: "nothing configured",
+			in:   Shutdown{},
+			want: ShutdownBudget{Drain: 0, Server: 5, Cleanup: 3},
+		},
+		{
+			name: "all four configured",
+			in:   Shutdown{Drain: ptr(10), Server: ptr(8), Cleanup: ptr(4), Grace: ptr(30)},
+			want: ShutdownBudget{Drain: 10, Server: 8, Cleanup: 4, Grace: 30},
+		},
+		{
+			// The case a plain int could not express: do not wait for
+			// in-flight requests, which is a reasonable thing to ask for when
+			// the grace period is very short.
+			name: "explicit zeros are spent, not replaced",
+			in:   Shutdown{Drain: ptr(0), Server: ptr(0), Cleanup: ptr(0)},
+			want: ShutdownBudget{Drain: 0, Server: 0, Cleanup: 0},
+		},
+		{
+			name: "one field configured, the rest default",
+			in:   Shutdown{Drain: ptr(15)},
+			want: ShutdownBudget{Drain: 15, Server: 5, Cleanup: 3},
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			got, err := tc.in.Budget()
+			if err != nil {
+				t.Fatalf("Budget() = %v", err)
+			}
+			if got != tc.want {
+				t.Errorf("Budget() = %+v, want %+v", got, tc.want)
+			}
+		})
+	}
+}
+
+// A negative is refused, not corrected. Turning it into zero would be the
+// failure this section exists to remove - written down, accepted, and not what
+// happens - and there is no reading of a negative wait to honour.
+//
+// The last row is what makes the other four mean anything: an implementation
+// that refused every value would pass them all.
+func TestShutdownBudgetRefusesNegativeSeconds(t *testing.T) {
+	for _, tc := range []struct {
+		name    string
+		in      Shutdown
+		wantErr bool
+	}{
+		{name: "negative drain", in: Shutdown{Drain: ptr(-1)}, wantErr: true},
+		{name: "negative server", in: Shutdown{Server: ptr(-1)}, wantErr: true},
+		{name: "negative cleanup", in: Shutdown{Cleanup: ptr(-1)}, wantErr: true},
+		{name: "negative grace", in: Shutdown{Grace: ptr(-1)}, wantErr: true},
+		{name: "explicit zeros are not negative", in: Shutdown{Drain: ptr(0), Server: ptr(0), Cleanup: ptr(0)}},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			_, err := tc.in.Budget()
+			if tc.wantErr && err == nil {
+				t.Fatal("Budget() accepted a negative number of seconds")
+			}
+			if !tc.wantErr && err != nil {
+				t.Fatalf("Budget() = %v, want the zeros taken literally", err)
+			}
+		})
+	}
+}
+
+// The message has to name every field that is wrong, not the first one: a
+// caller who fixes one and gets the same error back learns to distrust it.
+func TestShutdownBudgetNamesEveryNegativeField(t *testing.T) {
+	_, err := Shutdown{Drain: ptr(-1), Server: ptr(-30), Cleanup: ptr(-3), Grace: ptr(-9)}.Budget()
+	if err == nil {
+		t.Fatal("Budget() accepted four negative values")
+	}
+	for _, name := range []string{"drain", "server", "cleanup", "grace"} {
+		if !strings.Contains(err.Error(), name) {
+			t.Errorf("%q does not name %s", err, name)
+		}
+	}
+}
+
+// The sum is what has to fit inside the orchestrator's grace period, and the
+// verdict is only reached when a grace period was configured. A fixed
+// threshold instead would warn about the manifest this repository ships.
+func TestShutdownBudgetOverrun(t *testing.T) {
+	resolved := func(s Shutdown) ShutdownBudget {
+		b, err := s.Budget()
+		if err != nil {
+			t.Fatalf("Budget() = %v", err)
+		}
+		return b
+	}
+	for _, tc := range []struct {
+		name        string
+		budget      ShutdownBudget
+		wantTotal   int
+		wantOverrun int
+	}{
+		{
+			name:      "defaults, no grace period to judge against",
+			budget:    resolved(Shutdown{}),
+			wantTotal: 8,
+		},
+		{
+			name:      "fits with room to spare",
+			budget:    resolved(Shutdown{Drain: ptr(10), Grace: ptr(30)}),
+			wantTotal: 18,
+		},
+		{
+			// Equal is not a fit. The grace period is when SIGKILL is sent, so
+			// a budget that ends exactly then leaves the last callback no time
+			// to return.
+			name:        "exactly equal still overruns",
+			budget:      resolved(Shutdown{Drain: ptr(22), Grace: ptr(30)}),
+			wantTotal:   30,
+			wantOverrun: 1,
+		},
+		{
+			name:        "over by five",
+			budget:      resolved(Shutdown{Drain: ptr(26), Grace: ptr(30)}),
+			wantTotal:   34,
+			wantOverrun: 5,
+		},
+		{
+			// The reason the threshold is a configured value rather than a
+			// constant: the same budget is wrong under `docker stop` and right
+			// under a Kubernetes default.
+			name:        "the docker default is the tighter one",
+			budget:      resolved(Shutdown{Drain: ptr(10), Grace: ptr(10)}),
+			wantTotal:   18,
+			wantOverrun: 9,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := tc.budget.Total(); got != tc.wantTotal {
+				t.Errorf("Total() = %d, want %d", got, tc.wantTotal)
+			}
+			if got := tc.budget.Overrun(); got != tc.wantOverrun {
+				t.Errorf("Overrun() = %d, want %d", got, tc.wantOverrun)
+			}
+			if over := tc.budget.Overrun(); over > 0 && tc.budget.Total()-over >= tc.budget.Grace {
+				t.Errorf("Overrun() = %d does not bring %d under the %d grace period",
+					over, tc.budget.Total(), tc.budget.Grace)
+			}
+		})
+	}
+}

config/settings.full.yml

@@ -82,6 +82,40 @@ settings:
     # 会被负载均衡、监控和压测统计成成功）。
     rateLimit:
       inboundQPS: 200
+    # shutdown budgets, in seconds. The three are spent one after the other,
+    # and their sum has to stay inside the stop grace period the orchestrator
+    # allows - once it is up, SIGKILL arrives part-way through the cleanup
+    # callbacks, which is worse than not draining at all.
+    shutdown:
+      # How long to keep serving normally after a stop signal arrives. For that
+      # long /ready answers 503 and keep-alive is switched off, which is what
+      # gives a load balancer time to take this instance out of rotation before
+      # the listener closes.
+      #
+      # What to set depends on who removes this instance and on what basis. A
+      # load balancer that polls /ready itself needs at least "check interval x
+      # failure threshold + however long removal takes to apply". A Kubernetes
+      # Service removes the endpoint when the Pod is deleted, concurrently with
+      # SIGTERM and regardless of what the probe returns, so here this covers
+      # the delay in that removal reaching every node.
+      #
+      # 0 by default: a deployment that leaves this alone shuts down exactly as
+      # it did before this section existed. It also means /ready never reports
+      # draining - the flip and the closed listener are microseconds apart, and
+      # no poller reads anything in between.
+      drain: 0
+      # How long to wait for in-flight requests once the listener is closed.
+      server: 5
+      # How long the BeforeExit cleanup callbacks get after that.
+      cleanup: 3
+      # The stop grace period the orchestrator gives this process - `docker stop
+      # --timeout`, or terminationGracePeriodSeconds. Nothing reads it during a
+      # shutdown; start-up uses it to say whether the three budgets above fit
+      # inside it, and warns when they do not. Left out, nothing is compared:
+      # the reference values are 10s for docker and 30s for Kubernetes, three
+      # times apart, and a fixed threshold would warn about correct
+      # configurations.
+      #grace: 30
     # fileStore 对象存储。上传接口的 source 参数决定走哪一家：
     #   source=1 只存本地，source=2 阿里云 OSS，source=3 七牛 Kodo
     # 没有填的那一家在被请求时会返回明确错误，不会静默存到别处。

config/settings.yml

@@ -66,6 +66,40 @@ settings:
     # 会被负载均衡、监控和压测统计成成功）。
     rateLimit:
       inboundQPS: 200
+    # shutdown budgets, in seconds. The three are spent one after the other,
+    # and their sum has to stay inside the stop grace period the orchestrator
+    # allows - once it is up, SIGKILL arrives part-way through the cleanup
+    # callbacks, which is worse than not draining at all.
+    shutdown:
+      # How long to keep serving normally after a stop signal arrives. For that
+      # long /ready answers 503 and keep-alive is switched off, which is what
+      # gives a load balancer time to take this instance out of rotation before
+      # the listener closes.
+      #
+      # What to set depends on who removes this instance and on what basis. A
+      # load balancer that polls /ready itself needs at least "check interval x
+      # failure threshold + however long removal takes to apply". A Kubernetes
+      # Service removes the endpoint when the Pod is deleted, concurrently with
+      # SIGTERM and regardless of what the probe returns, so here this covers
+      # the delay in that removal reaching every node.
+      #
+      # 0 by default: a deployment that leaves this alone shuts down exactly as
+      # it did before this section existed. It also means /ready never reports
+      # draining - the flip and the closed listener are microseconds apart, and
+      # no poller reads anything in between.
+      drain: 0
+      # How long to wait for in-flight requests once the listener is closed.
+      server: 5
+      # How long the BeforeExit cleanup callbacks get after that.
+      cleanup: 3
+      # The stop grace period the orchestrator gives this process - `docker stop
+      # --timeout`, or terminationGracePeriodSeconds. Nothing reads it during a
+      # shutdown; start-up uses it to say whether the three budgets above fit
+      # inside it, and warns when they do not. Left out, nothing is compared:
+      # the reference values are 10s for docker and 30s for Kubernetes, three
+      # times apart, and a fixed threshold would warn about correct
+      # configurations.
+      #grace: 30
   cache:
 #    redis:
 #      addr: 127.0.0.1:6379

config/settings_shutdown_test.go

@@ -0,0 +1,68 @@
+package config
+
+import (
+	"testing"
+
+	coreconfig "github.com/go-admin-team/go-admin-core/v2/config"
+	"github.com/go-admin-team/go-admin-core/v2/config/source/file"
+)
+
+// shippedSettings is the shape the loader fills in, cut down to the part under
+// test. The reader is JSON-based, so the keys are matched against field names
+// case-insensitively - which is exactly the matching that silently drops a
+// section the struct has no field for.
+type shippedSettings struct {
+	Settings struct {
+		Extend Extend
+	}
+}
+
+func (*shippedSettings) OnChange() {}
+
+// The shutdown section has to arrive where it is read from, and with the
+// values the documentation claims.
+//
+// This is the failure this batch exists to remove, one level up: the loader
+// discards keys no field matches, without an error and without a log line, so
+// a section put in the wrong place is written, accepted, and never applied.
+// Nothing but loading the shipped file through the real loader can tell the
+// two apart - the struct compiles either way.
+//
+// The values are asserted as well as the arrival. A settings.yml that shipped
+// a different default from config.Default*Seconds would give two answers to
+// "what does an unconfigured deployment spend", and the file is the one people
+// read.
+func TestTheShippedSettingsReachTheShutdownStruct(t *testing.T) {
+	for _, name := range []string{"settings.yml", "settings.full.yml"} {
+		t.Run(name, func(t *testing.T) {
+			var loaded shippedSettings
+			c, err := coreconfig.NewConfig(
+				coreconfig.WithSource(file.NewSource(file.WithPath(name))),
+				coreconfig.WithEntity(&loaded),
+			)
+			if err != nil {
+				t.Fatalf("load %s: %v", name, err)
+			}
+			t.Cleanup(func() { _ = c.Close() })
+
+			s := loaded.Settings.Extend.Shutdown
+			if s.Drain == nil || s.Server == nil || s.Cleanup == nil {
+				t.Fatalf("%s left extend.shutdown unfilled (%+v); the section is written but nothing reads it",
+					name, s)
+			}
+
+			want := ShutdownBudget{
+				Drain:   DefaultDrainSeconds,
+				Server:  DefaultServerSeconds,
+				Cleanup: DefaultCleanupSeconds,
+			}
+			got, err := s.Budget()
+			if err != nil {
+				t.Fatalf("%s does not resolve: %v", name, err)
+			}
+			if got != want {
+				t.Errorf("%s ships %+v, want the documented defaults %+v", name, got, want)
+			}
+		})
+	}
+}

docker-compose.yml

@@ -7,6 +7,13 @@ services:
     restart: always
     ports:
       - 8000:8000
+    # Compose allows 10 seconds by default, and this process spends
+    # drain + server + cleanup from extend.shutdown before it exits - 8 out of
+    # the box, more for anyone who configures a drain window. Past the deadline
+    # it is sent SIGKILL and the cleanup callbacks are cut off part-way
+    # through. checksilent's docker-stop-cuts-shutdown-short check compares
+    # this against config/settings.yml.
+    stop_grace_period: 30s
     volumes:
       - ./config/:/go-admin-api/config/
       - ./static/:/go-admin-api/static/

docs/contract.md

@@ -1,64 +1,453 @@
 # 公共契约面
 
 > 本文写给**第三方应用作者**：你写一个装进 go-admin 的业务模块，可以依赖什么、
-> 怎么注册进来、哪些东西随时可能变。
+> 怎么接进来、哪些约定不遵守会**不报错地出错**。
 >
 > 主仓贡献者的编码约定见根目录 `AGENTS.md`，设计取舍见 `docs/architecture.md`。
 
 ---
 
-## 承诺稳定的包
+## 契约面在 core，不在 go-admin
 
-| 包 | 用途 |
-|---|---|
-| `common/actions` | 通用 CRUD Action（Index / View / Create / Update / Delete / Permission） |
-| `common/dto` | 分页、`search` tag 解析、`Control` / `Index` 接口 |
-| `common/models` | `ActiveRecord`、`ControlBy`、`ModelTime`、`Model` |
-| `common/middleware` | `AuthCheckRole`、`InitMiddleware` 等 |
+这份文档以前列的是 go-admin 自己的四个包（`common/actions` 等），依据写的是
+「把 `app/demo` 的 import 去重之后恰好就是这四个」。
 
-**依据不是拍脑袋列的**：`app/demo` 是一个可编译、有测试、CI 会跑的标准 CRUD 模块，
-把它的 `go-admin/` 前缀 import 全部去重之后，恰好就是这四个包 —— 它代表
-"写一个标准模块所需要的最小依赖面"。你的模块如果需要第五个包，先在 issue 里说一声，
-那多半意味着契约面缺了什么。
+**那个依据是错的，而且错的方向是把人引向依赖宿主。**
 
-"稳定"的含义：**在 `2.x` 内不做破坏性变更**。新增导出符号不算破坏；改签名、
-改语义、删除导出符号算，会走 major 版本并在 release note 里单列。
+go-admin 的使用方式是 clone / fork：每个使用者拿到的是一整份代码，然后**改它**。
+应用如果依赖 `go-admin/common/actions`，它依赖的是一个**每个使用者都不一样、
+而且随时在变**的东西——你没有办法测试自己的应用在别人改过的 fork 上能不能编译。
 
-### 没有已知例外
+还有一条更硬的：`go-admin` 这个 module path 没有点号，
+按 Go 的规则**不是合法的可解析模块路径**：
 
-这四个包**不 import `app/` 下的任何东西**，2026-08-31 起由 CI 强制
-（见下方「边界由 CI 守着」）。在此之前有两处反向依赖，都已根治：
+```
+$ go get go-admin/common/models
+go: malformed module path "go-admin/common/models": missing dot in first path element
+```
 
-| 原位置 | 反向依赖 | 处理 |
-|---|---|---|
-| `common/middleware/logger.go` | `app/admin/service/dto` 的两个操作日志状态常量 | 常量下沉到 `common/global`，`dto` 侧保留同名常量作为 deprecated 别名，fork 不受影响 |
-| `common/middleware/handler/auth.go` | `app/admin/models` 的 `SysUser` / `SysRole` | 该段断言恒失败、设的是零值且开源版无人读取，属死代码，已删除 |
+想 import 它就必须写 `replace`，而**非主模块的 `replace` 会被忽略**——
+你在自己应用里写的 replace 对使用者不生效。所以「应用 require go-admin」
+这条路不是不优雅，是走不通。
 
-之所以不把它们记成"已知例外"：这份文档的作用就是告诉你哪些包可以依赖，
-如果第一条下面就挂着例外脚注，后来人会照着例外抄，边界从第一天起就是脏的。
+契约面因此落在 **go-admin-core**：那是唯一一个大家都一样、有版本号、
+不会被使用者随手改的东西。
 
 ---
 
-## 其余包不保证稳定
+## 承诺稳定的包
 
-`common/` 下没有出现在上表里的包（`common/global`、`common/storage`、
-`common/database`、`common/file_store`、`common/response`、`common/service`、
-`common/apis`、`common/middleware/handler`、根 `common` 包……）以及
-`app/admin` 的内部实现，**均不承诺稳定**。
+全部在 `github.com/go-admin-team/go-admin-core/v2` 下：
 
-其中 `common/global`、`common/middleware/handler`、根 `common` 包是
-`common/middleware` 的编译期依赖 —— 它们会被一起拉进你的依赖图，但这不代表
-它们的 API 稳定。**不要因为"都在 `common/` 目录下"就认为是契约面。**
+| 包 | 用途 |
+|---|---|
+| `sdk/contract/models` | `Model` / `ControlBy` / `ModelTime` / `ActiveRecord` / `BaseUser` / `Migration`、`sys_menu.menu_type` 的三个枚举值 |
+| `sdk/contract/dto` | `Pagination` / `MakeCondition` / `Paginate` / `OrderDest` / `ObjectById`、`Index` 与 `Control` 接口 |
+| `sdk/contract/actions` | 数据权限设施：`DataPermission` / `Permission` / `PermissionAction` / `GetPermissionFromContext`、五个 `DataScope*` 常量与 `IsValidDataScope` |
+| `sdk/contract/migration` | `Registry` / `AppRegistrar` / `ForApp` / `SetVersion` / `GetFilename` |
+| `sdk/contract/seed` | `MenuSpec` / `ApiSpec` / `Seeder` / `SeedMenus`——往侧边栏和接口表里登记自己 |
+| `sdk/pkg` | `GetOrm(c)`：从请求上下文取本租户的数据库连接 |
+| `sdk/api`、`sdk/service` | 可选的 Api / Service 基类 |
+| `response` | `OK` / `Error` / `PageOK`：响应格式 |
+| `jwtauth/user` | 从 token 取当前用户身份 |
+| `sdk/runtime` | 中间件 key 常量与 `GetHandlerFunc`：复用宿主已注册的鉴权链 |
 
-规划中的 001（模块路径改名）会把非契约包移进 `internal/`，由编译器强制这条边界。
-届时上表之外的包对外部模块直接不可见 —— 现在就照上表写，那次改动对你零成本。
+`sdk/contract/` 这个前缀的含义就是「**承诺对应用稳定**的那一面」。core 里
+`sdk/` 下的其他包是框架基础设施，语义不同——上表逐个列了名字，
+**不要因为「都在 core 里」就认为是契约面**。
+
+"稳定"的含义：**在 core 的 `v2.x` 内不做破坏性变更**。新增导出符号不算破坏；
+改签名、改语义、删除导出符号算，会走 major 版本并在 release note 里单列。
+
+准确的语义以 core 那份文档为准：
+[go-admin-core `docs/contract.md`](https://github.com/go-admin-team/go-admin-core/blob/main/docs/contract.md)。
+本文写的是宿主这一侧——它管不着的那些。
+
+### go-admin 自己的包
+
+`go-admin/common/models`、`common/dto`、`common/actions` 里的契约类型现在是
+**指向 core 的类型别名**（`type X = corepkg.X`），主仓和所有 fork 的存量代码
+一行不用改。别名在编译期就是同一个类型，不是"兼容层"。
+
+但**新写的应用不要 import 它们**——那样就又依赖上宿主了。
+
+---
+
+## 契约面是三层，不是一层
+
+划分依据不是"应用会 import 哪些包"，而是**"哪一条不遵守会静默出错"**：
+
+| 层 | 内容 | 判据 |
+|---|---|---|
+| **一 · 必须遵守** | 路由注册、从 context 取库、响应 shape、`ControlBy`/`ModelTime`、鉴权、数据权限、事务范式 | 不遵守 → **不报错，行为悄悄不对** |
+| **二 · 可选便利** | `api.Api`、`service.Service`、CRUD Action、`MakeCondition` | 用不用都对 |
+| **三 · 今天空白** | 应用间调用、领域事件、缓存租户隔离 | **没有。别自己发明** |
+
+**框架不强制任何一层抽象。** 一个不用任何便利层的 handler 完全合法：
+
+```go
+func handler(c *gin.Context) {
+    db, err := pkg.GetOrm(c)
+    if err != nil {
+        response.Error(c, 500, err, "")
+        return
+    }
+    var list []MyModel
+    if err := db.Find(&list).Error; err != nil {
+        response.Error(c, 500, err, "")
+        return
+    }
+    response.OK(c, list, "")
+}
+```
+
+第一层则是不管你用不用便利层都要遵守的，逐条写在下面，每条都附**不遵守会怎样**。
+
+---
+
+## 第一层：不遵守就静默出错
+
+### 1. 路由注册
+
+见下方「注册路由」一节。
+
+**不遵守会怎样**：注册表在 `RunAppRouters()` 之后就封闭了，晚到的注册被丢弃，
+只记一条 ERROR 日志。包级 `AppRouters` 连这个都没有——它就是一个普通 slice，
+什么时候 append 都"成功"，启动钩子之后 append 的那些永远不会执行，**且不出声**。
+
+### 2. 数据库连接从 context 取，不用全局变量
+
+```go
+db, err := pkg.GetOrm(c)          // 唯一正确的取法
+```
+
+`common/middleware/db.go` 在每个请求上按 `c.Request.Host` 挑出本租户的连接
+放进 context：
+
+```go
+c.Set("db", sdk.Runtime.GetDbByTenant(c.Request.Host).WithContext(c))
+```
+
+**不遵守会怎样**：连接是**按租户注册**的（`SetDbByTenant(host, db)`），
+`GetOrm(c)` 按 `c.Request.Host` 挑。你要是在启动时把某个连接存进包级变量再一直用，
+多租户部署下所有租户的读写就都落到那一个库上——不报错、不告警，数据串了才发现。
+
+这个坑在本仓库真踩过：`common/global.Driver` 取的是启动循环
+**迭代到的第一个**库的驱动（`common/database/initialize.go`），
+而 Go 的 map 迭代顺序是随机的——两个库用不同驱动时，那个值每次启动都可能不一样。
+所以「一个进程一个库」这个假设不要写进任何一行代码。
+
+### 3. 响应 shape
+
+一律用 `response.OK` / `response.Error` / `response.PageOK`，不要自己
+`c.JSON`。它们发出去的形状是：
+
+```jsonc
+// 成功
+{"requestId": "...", "code": 200, "data": {...}}
+// 分页：data 里再套一层
+{"requestId": "...", "code": 200, "data": {"count": 42, "pageIndex": 1, "pageSize": 10, "list": [...]}}
+// 失败
+{"requestId": "...", "code": 500, "msg": "...", "status": "error"}
+```
+
+**HTTP 状态码永远是 200**，业务码在 body 的 `code` 里——这是既定行为，
+`response.Error` 走的是 `c.AbortWithStatusJSON(http.StatusOK, res)`。
+
+**不遵守会怎样**：前端 `src/utils/request.ts` 的响应拦截器只读 body 的 `code`，
+`code !== 200` 就弹一条 `msg` 内容的 error toast 并 reject。你自己
+`c.JSON(200, myThing)` 的话 `code` 是 `undefined`，界面上弹出来的是**一条空的
+错误提示**，数据到不了页面。列表更安静：`useTable.ts` 读的是
+`page?.list ?? []` 和 `page?.count ?? 0`，形状对不上就是**一张空表，零报错**。
+
+### 4. `ControlBy` 与 `ModelTime`
+
+每张业务表的 model 都嵌这三个：
+
+```go
+type Order struct {
+    models.Model        // Id
+    // ... 你的字段 ...
+    models.ControlBy    // CreateBy / UpdateBy
+    models.ModelTime    // CreatedAt / UpdatedAt / DeletedAt
+}
+
+func (Order) TableName() string { return "app_order" }   // 必须显式声明
+```
+
+`ControlBy` 提供 `create_by` 列，**数据权限的每一条 SQL 都 join 在它上面**。
+`ModelTime` 的 `DeletedAt` 是 `soft_delete.DeletedAt`（毫秒时间戳，活行为 0，
+永不为 NULL），不是 `gorm.DeletedAt`。
+
+**不遵守会怎样**：
+
+- 嵌了 `ControlBy` 但写入时忘了 `SetCreateBy(user.GetUserId(c))`，
+  `create_by` 就是 0。除「全部数据权限」外的每一档都**查不到任何数据**，
+  而且不报错——看起来像"这个用户还没建过数据"。
+- 用错 `ModelTime` 版本（可空的 `gorm.DeletedAt`）：gorm 按
+  `deleted_at IS NULL` 过滤，而活行里存的是 0，于是**整张表一行都查不出来**。
+  主仓的 `sys_columns` / `sys_tables` 真在这个状态下待过——代码生成器
+  一张表都列不出来，没有任何报错。`make checksilent` 的 `modeltime-mix`
+  就是为这条加的。
+- `TableName()` 忘了写：GORM 配了 `SingularTable`，不会推导复数，表名会是
+  你没预料的那个。
+
+### 5. 鉴权：用宿主已注册的中间件，不要自己造
+
+```go
+jwtCheck, ok := sdk.Runtime.GetHandlerFunc(runtime.JwtTokenCheck)
+if !ok {
+    log.Fatal("JwtTokenCheck is not registered; is the host started via cmd/api?")
+}
+roleCheck, _ := sdk.Runtime.GetHandlerFunc(runtime.RoleCheck)
+permCheck, _ := sdk.Runtime.GetHandlerFunc(runtime.PermissionCheck)
+
+g := v1.Group("/order").Use(jwtCheck).Use(roleCheck).Use(permCheck)
+```
+
+三个 key 的常量在 `sdk/runtime`，宿主启动时把三个中间件注册进去。
+
+**不遵守会怎样**：`GetHandlerFunc` 在"没注册"和"注册成了别的类型"两种情况下
+都返回 `ok=false` 而不是 panic——**因为路由注册跑在 core 的 panic 护栏里面，
+裸类型断言 panic 之后日志报的是"这个模块一条路由都没注册上"，跟真实原因对不上**。
+所以 `ok` 必须自己判，判出来要**大声失败**：一个跳过鉴权继续注册的路由，
+就是一条静默的匿名可访问接口。
+
+**宿主必须注册绑定过的闭包。** 三个 key 存的都得是 `gin.HandlerFunc`——
+比如 `authMiddleware.MiddlewareFunc()`，**不是** `(*jwt.GinJWTMiddleware).MiddlewareFunc`。
+后者是方法表达式，没有接收者绑在上面，取回来断言不成 `gin.HandlerFunc`，
+怎么断言都做不成一个能用的 handler。
+
+> **当前状态**：`common/middleware/init.go` 里 `RoleCheck` 与 `PermissionCheck`
+> 注册的是 `AuthCheckRole()` 和 `actions.PermissionAction()`，都是绑定过的闭包，
+> 取回来就能用；**`JwtTokenCheck` 注册的还是那个方法表达式**，所以今天对它
+> `GetHandlerFunc` 拿到的是 `ok=false`。上面那段 `log.Fatal` 会在启动时打出来——
+> 这是有意的，宁可起不来也不要一条没鉴权的路由。主仓这一处的修复见 F10，
+> 修完之后本段可以删掉。
+
+还有一条**不影响行为但影响理解**的：主仓今天四个模块各自调一次 `AuthInit()`
+（`app/admin`、`app/jobs`、`app/other`、`app/demo`），也就是有四个 JWT 实例。
+这不产生行为差异——配置同源（`config.JwtConfig`），JWT 校验是无状态的，
+不看实例身份。但它意味着 `GetHandlerFunc(runtime.JwtTokenCheck)` 取回来的是
+**最后注册进去的那一个**。要让应用拿到一个有意义的共享实例，宿主应当在注册路由
+之前构造一次，而不是每个模块构造一次。
+
+**测的时候别用 `admin` 账号。** `AuthCheckRole` 里 `rolekey == "admin"` 直接
+`c.Next()`，**完全跳过 Casbin**。拿 admin 压任何鉴权路径都测不到东西。
+
+### 6. 数据权限
+
+两件事都要做：
+
+```go
+// 路由上挂中间件（上一节的 permCheck 就是它）
+g := v1.Group("/order").Use(permCheck)
+
+// 查询里组合 scope
+p := actions.GetPermissionFromContext(c)
+db.Scopes(actions.Permission(Order{}.TableName(), p)).Find(&list)
+```
+
+`sys_role.data_scope` 有五档，`Permission()` 按它拼 WHERE 条件：
+
+| 值 | 常量 | 含义 | 条件 |
+|---|---|---|---|
+| `1` | `DataScopeAll` | 全部数据权限 | 不加条件 |
+| `2` | `DataScopeCustom` | 自定义数据权限 | `create_by` 属于 `sys_role_dept` 关联到的部门 |
+| `3` | `DataScopeDept` | 本部门 | `create_by` 属于本部门 |
+| `4` | `DataScopeDeptTree` | 本部门及以下 | `create_by` 属于 `dept_path` 匹配的子树 |
+| `5` | `DataScopeSelf` | 仅本人 | `create_by = 当前用户` |
+
+自己往 `sys_role.data_scope` 写值的话先过一遍 `IsValidDataScope`——
+写进去的非法值不会在写入时报错，只会在**每一次查询**里静默地什么都查不到。
+
+**不遵守会怎样**，两种漏法的方向相反，值得分清：
+
+- **查询里忘了组合 `Permission()`** —— 就是**全量可见**，每个角色都看得到所有人
+  的数据，不报错、不记日志。**这是本框架里最贵的一类静默失败**，所以那一行
+  `db.Scopes(...)` 不是"最佳实践"，是契约。
+- **组合了 `Permission()` 但路由上漏挂中间件** —— 上下文里没有 `PermissionKey`，
+  拿到的是零值，`DataScope` 是空串，落进下面那个 fail-closed 的 default，
+  结果是**一行都查不到**。方向反了，至少还看得见。
+
+五档之外的值（空串、拼错的、还没迁移的老数据）落到 `default` 分支，
+那里是 **fail closed**：加一条 `1 = 0`，什么都不返回。注意 `1`（全部数据权限）
+是**显式列出的一个 case**，不是"落到 default"——两者曾经是同一条路，
+于是"没配置"和"配置成看全部"产出的 SQL 一个字都不差。
+
+`3` / `4` 两档在 `DeptId <= 0` 时同样 fail closed。原因是
+`sys_dept.dept_path` 一律以 `/0/` 开头，`dept_id=0` 会把 LIKE 模式变成
+`'%/0/%'`，**命中全表**——本来想表达"没有部门"，实际表达的是"全部部门"。
+
+数据权限还有一个**全局开关** `application.enabledp`，默认是 `false`。
+关掉时 `Permission()` 原样返回查询、`PermissionAction()` 直接放行——
+**你的应用在默认配置下测不出数据权限的任何行为**，要验证得先把它打开。
+
+**不要自己重写这段 SQL。** 那 20 行里埋着 8 项内部知识：JWT claims 的私有键名
+（`datascope` / `deptid`）、`sys_user`↔`sys_role` 的 join、`sys_role_dept`
+关联表、`sys_dept.dept_path` 的 `/0/1/2/` 编码、`create_by` 的归属约定、
+`enabledp` 开关、老 token 的回落逻辑。**而且写错的方向是越权。**
+仓库里有过一份第二实现，`dept_path` 的匹配写成 `"%"+id+"%"` 少了两个斜杠，
+`dept_id=1` 会匹配上 `/11/`、`/21/`、`/100/`——写它的人比第三方更懂这套约定，
+仍然写错了。那份实现已经删掉了。
+
+### 7. 事务范式
+
+**业务层的事务一律用 `Transaction()` 闭包形式**：
+
+```go
+err := db.Transaction(func(tx *gorm.DB) error {
+    if err := tx.Create(&order).Error; err != nil {
+        return err   // rolled back
+    }
+    return tx.Model(&stock).Where("qty >= ?", n).
+        UpdateColumn("qty", gorm.Expr("qty - ?", n)).Error
+})
+```
+
+GORM 自己处理提交、回滚，以及 **panic 时的回滚**。
+
+**不要照抄 `app/admin/service/sys_role.go`。** 那里有 5 处手写的
+`Begin` / `defer` 写法，三个缺陷都是静默的：
+
+```go
+tx := e.Orm
+if config.DatabaseConfig.Driver != "sqlite3" {   // 缺陷 2
+    tx = e.Orm.Begin()
+    defer func() {
+        if err != nil { tx.Rollback() } else { tx.Commit() }   // 缺陷 1
+    }()
+}
+```
+
+1. **panic 时提交半截事务**——defer 只看 `err`，panic 时 `err` 仍是 nil，走的是
+   `Commit()`
+2. **sqlite 下根本不开事务**——那一整个特判让 `tx` 就是 `e.Orm` 本身，
+   写一半失败留一半
+3. **读 `config.DatabaseConfig.Driver`**——那是全局单库配置，多租户下不是
+   当前租户的驱动
+
+缺陷 1 不止那一处：`app/admin/service/sys_dept.go`、`sys_menu.go`、
+`app/other/models/tools/sys_tables.go` 用的是同一个 `defer` 写法
+（没有 sqlite 特判，所以只有缺陷 1）。**整个 `Begin`/`defer` 家族都别照抄。**
+
+同一个仓库里就有正确的参照：`cmd/migrate/migration/version/` 下 7 个迁移里
+5 个用的是闭包形式（另外两个是纯 DDL 标记，DDL 在 MySQL 下本来就不进事务），
+且这条路在 sqlite 下实测跑得通（`make build-sqlite`）。
+主仓那些写法本批次不改，单独跟。
+
+**并发保护用条件更新 + `RowsAffected`**，不要"先查后改"：
+
+```go
+res := tx.Model(&Order{}).Where("id = ? AND status = ?", id, StatusPending).
+    Update("status", StatusPaid)
+if res.Error != nil { return res.Error }
+if res.RowsAffected == 0 { return ErrAlreadyPaid }   // 别人先改了
+```
+
+---
+
+## 第二层：可选便利
+
+用不用都对，**不用不会出任何问题**：
+
+| 东西 | 在哪 | 是什么 |
+|---|---|---|
+| `api.Api` | core `sdk/api` | 一条链式糖：`MakeContext` / `Bind` / `MakeOrm` / `OK` / `PageOK` / `Error` |
+| `service.Service` | core `sdk/service` | 一个装 `Orm` / `Log` / `Cache` / `Error` 的结构体加一个 `AddError` |
+| `MakeCondition` / `search` tag | core `sdk/contract/dto` | 把 DTO 上的 `search:"type:exact;column:name;table:xx"` 翻成 WHERE |
+| 通用 CRUD Action | go-admin `common/actions` | `IndexAction` 等五个。**留在 go-admin，没有下沉** |
+
+最后一行是有意的：CRUD Action 是最需要演进的一类东西（分页参数、批量操作、
+软删语义、字段级权限），而 core 的每一个导出都是永久承诺——放进去容易，
+拿出来不可能。想用就把那 294 行抄走，抄走的那份还能按你自己的需要改。
+主仓唯一的真实业务模块 `app/admin` **一个 CRUD Action 都没用**，全是手写 Service。
+
+`MakeCondition` 返回的是 `func(db *gorm.DB) *gorm.DB` 闭包，方言从闭包里那个
+`db.Dialector.Name()` 读，**必然是本租户那个库的驱动**，不需要你设置任何东西。
+
+---
+
+## 第三层：今天没有的
+
+**明说没有，别自己发明**：
+
+| 能力 | 现状 |
+|---|---|
+| 应用间调用 | 零定义。A 应用要调 B 应用只能直接 import 对方的包，循环依赖就回来了 |
+| 领域事件 / EventBus | 无 |
+| 缓存的租户隔离 | `service.Service` 有 `Cache` 字段，**是否按租户隔离未验证**。当作没隔离来写 |
+| 生命周期钩子之外的时点 | 只有下面那四个。没有「路由装好之后、开始监听之前」这一档 |
+
+这几条留给后续批次，按真实需求补——现在凭空设计只会设计错。
+如果你的应用卡在这里，在 issue 里说一声，那正是我们要的输入。
+
+---
+
+## 装一个应用要接两处线
+
+后端**两处**，漏掉第二处是**静默失败**：
+
+```go
+// 1. 路由：cmd/api/<name>.go
+import _ "github.com/acme/go-admin-app-order/router"
+
+// 2. 迁移：cmd/migrate/server.go 的 import 块里
+import _ "github.com/acme/go-admin-app-order/migration"
+```
+
+两个都是空导入，作用只是让那个包的 `init()` 跑起来。
+
+**漏了第二处会怎样**：不报错。`migrate` 命令照常跑完、照常打印成功，
+你的建表和种子数据**就是不执行**。等到第一个请求打过来才会看到
+"表不存在"，而那时排查方向已经跑偏了。
+
+`migrate --dry-run` 是确认接线成功的最快方式——它只读，可以直接对生产库跑：
+
+```bash
+go-admin migrate --dry-run -c config/settings.yml    # 你的迁移应该出现在列表里
+```
+
+带界面的应用还有第三处，在前端仓库，见下一节。
+
+---
+
+## 前端：菜单 `component` 必须以 `apps/` 开头
+
+前端那一处接线是 `go-admin-ui` 的 `apps.config.mjs`——加一条
+`{ code: 'order', source: '...' }`，`source` 指到你的页面目录
+（兄弟目录的相对路径，或 `./node_modules/@scope/app-order/views/order`）。
+`scripts/sync-apps.mjs` 会在 `pnpm dev` 与 `pnpm build` 之前把它复制进
+`src/apps/<code>/`，不需要手工跑。
+
+`src/stores/permission.ts` 的 `appPath()` **只认路径第一段是 `apps`**，
+其余一律当成主仓内置视图去 `src/views/` 下找。
+
+所以你的菜单种子里 `Component` 必须写成：
+
+```
+apps/<code>/<该应用内的相对路径>/index
+```
+
+比如 `code` 是 `order` 的应用写 `apps/order/index`（开头带不带 `/` 都行，
+只看第一段）。**不能**写成 `/order/index`。
+
+**写错会怎样**：第一段是 `order` 而不是 `apps`，前端会去找一个不存在的
+`src/views/order/index.vue`，页面摔到 `AppNotInstalled` 占位组件。
+但控制台打印的是 `no component at src/views/order/index.vue`——
+**跟真实原因（漏了 `apps/` 前缀）对不上**，排查时很容易被这条日志带偏。
+
+对应的前端约定写在 go-admin-ui 的 `AGENTS.md`。另外一条：`source` 目录的内容
+**原样**搬进 `src/apps/<code>/`，不会在 `code` 之外再自动插一层——想要
+`apps/order/index` 这种最短形式，`source` 就要直接指到该应用**这一个页面模块**
+的目录，而不是应用仓库的 `views` 根目录。
 
 ---
 
 ## 注册路由
 
-一个应用模块要注册自己的路由，写一个 `func()` 签名的 `InitRouter`
-（照抄 `app/demo/router/router.go`），然后二选一接进来：
+写一个 `func()` 签名的 `InitRouter`（照抄 `app/demo/router/router.go`），
+然后二选一接进来：
 
 ```go
 // 方式一（历史写法，仍然有效）：在主仓 cmd/api/<name>.go 里
@@ -68,36 +457,30 @@ AppRouters = append(AppRouters, router.InitRouter)
 sdk.Runtime.SetAppRouters(router.InitRouter)
 ```
 
-方式二是本次新接上的。差别只有一个但很关键：方式一要求你的模块
-`import "go-admin/cmd/api"` —— 那是主程序的命令包，让业务模块依赖它很别扭，
-也正是"主仓要为每个模块加一个七行文件"的根源。
+**第三方应用只能走方式二**——方式一要求 `import "go-admin/cmd/api"`，
+那就又依赖上宿主了。
 
-**执行顺序**：先跑完包级 `AppRouters`，再由 core 的 `sdk.Runtime.RunAppRouters()`
-跑它自己的注册表，各自内部保持注册顺序。别依赖跨来源的相对顺序，各模块的
-`RouterGroup` 前缀互不相同，本来就不该有顺序依赖。
+走方式二还多拿到两样东西，都在 core 那边实现：
 
-走方式二还多拿到两样东西，都在 core 那边实现（见
-[core 的 `docs/contract.md`](https://github.com/go-admin-team/go-admin-core/blob/main/docs/contract.md)）：
-**panic 护栏**——你的 `InitRouter` panic 了，其余模块照常注册、进程不退出，日志里会写明
-是哪一行注册的；**失败分级**——`sdk.Runtime.SetAppRoutersWith(f, runtime.WithFatal())`
-声明「我起不来就别启动」。方式一（包级 `AppRouters`）没有护栏，panic 直接掀桌。
+- **panic 护栏**——你的 `InitRouter` panic 了，其余模块照常注册、进程不退出，
+  日志里会写明是哪一行注册的
+- **失败分级**——`sdk.Runtime.SetAppRoutersWith(f, runtime.WithFatal())`
+  声明「我起不来就别启动」
 
-`InitRouter()` 内部的约定：自己拿 `sdk.Runtime.GetEngine()`，按需建
+方式一（包级 `AppRouters`）没有护栏，panic 直接掀桌。
+
+**执行顺序**：先跑完包级 `AppRouters`，再由 `sdk.Runtime.RunAppRouters()`
+跑 core 自己的注册表，各自内部保持注册顺序。别依赖跨来源的相对顺序。
+
+`InitRouter()` 内部：自己拿 `sdk.Runtime.GetEngine()`，按需建
 `gin.RouterGroup`，通过 `init()` 自注册到你自己包内的
-`routerCheckRole` / `routerNoCheckRole` 列表，不在任何中心文件手工列举
-（与 `AGENTS.md`「路由注册」一节一致）。
+`routerCheckRole` / `routerNoCheckRole` 列表，不在任何中心文件手工列举。
 
 ---
 
 ## 注册数据库迁移
 
-框架自身的迁移不变：
-
-```go
-migration.Migrate.SetVersion(migration.GetFilename(fileName), _1786700001000DemoMenu)
-```
-
-应用的迁移走 `ForApp`：
+框架自身的迁移用 `SetVersion`；应用的迁移走 `ForApp`：
 
 ```go
 func init() {
@@ -108,12 +491,20 @@ func init() {
 func initCrmTables(db *gorm.DB, version, appCode string) error {
     return db.Transaction(func(tx *gorm.DB) error {
         // ... schema / data changes ...
-        return tx.Create(&common.Migration{Version: version, AppCode: appCode}).Error
+        return tx.Create(&models.Migration{Version: version, AppCode: appCode}).Error
     })
 }
 ```
 
-四条必须知道的规则：
+注册面（`ForApp` / `SetVersion` / `GetFilename`）在 core 的
+`sdk/contract/migration`，是一个**进程级的包级注册表**——`ForApp` 直接当包级函数
+调，不需要从宿主手里接过什么句柄。**执行面**——读 `sys_migration`、排序、跑事务、
+`migrate` 与 `migrate status` 两个命令——留在宿主，它通过 `Snapshot()` 读那张表。
+
+仓库内的模块继续经 `go-admin/cmd/migrate/migration` 走，那个包现在是薄壳，
+导入路径不变；外置应用直接 import core 的那个包，**两边写法一模一样**。
+
+五条必须知道的规则：
 
 1. **完成记录由迁移函数自己写**，而且要写在自己的事务里。框架的调度循环只做
    "这个 version 在 `sys_migration` 里有没有" 的判断，从不代你插入 —— 这样
@@ -122,12 +513,17 @@ func initCrmTables(db *gorm.DB, version, appCode string) error {
    schema 上那一列等于白加，你的迁移会被记成框架的。
 3. **落库的 `version` 是加了前缀的**。`ForApp("crm")` 注册 `1786800001000`，
    实际写进 `sys_migration.version` 的是 `crm-1786800001000`，函数收到的
-   `version` 参数已经是这个带前缀的值，照抄进 `common.Migration{Version: version}`
+   `version` 参数已经是这个带前缀的值，照抄进 `models.Migration{Version: version}`
    即可。前缀的意义是：两个来源不同的应用哪怕碰巧生成同一个毫秒时间戳，也不会撞主键、
    不会有一方被误判为"已应用"。
 4. **应用 code 一律小写**，`ForApp` 会自己 `strings.ToLower` 一遍。`core` 是保留字
    （`migrate status` 用它表示框架自身，`--app core` 选中框架），`ForApp("core")`
    会 panic。
+5. **文件名前 13 位必须是毫秒时间戳**，`GetFilename` 就是从这里取版本号的。
+   不合规的名字会 panic，并把违规文件名报出来 —— 这是**故意的**：调用点全在
+   `init()` 里，没有 error 可返回，而另一条路是把文件名本身注册成"版本号"
+   （`add_orders.go` 恰好 13 个字符，只查长度是拦不住的），那样这条迁移
+   永远不会被执行，且不会有任何提示。宁可启动失败。
 
 顺序保证：**同一应用内按版本号严格有序**。跨应用顺序不做承诺 —— 由于前缀的存在，
 今天的实际顺序是"先跑完全部框架迁移，再按 appCode 字母序逐个应用跑完"，
@@ -146,6 +542,98 @@ go-admin migrate --app crm -c config/settings.yml       # 只跑 crm 的迁移
 
 ---
 
+## 菜单与接口种子
+
+一个带界面的应用要在侧边栏里出现，需要往四类数据里写东西：`sys_api`、
+`sys_menu`、`sys_menu_api_rule`（菜单与接口的关联）、以及角色授权与 Casbin
+策略（`sys_role_menu` / `casbin_rule`）。
+
+**你不需要知道这些表长什么样。** `sdk/contract/seed` 让你只描述"我要什么"，
+由宿主决定"怎么写进它自己的表"：
+
+```go
+// 在你自己的迁移里，用它自己的那个事务
+err := seed.SeedMenus(tx, "order", []seed.MenuSpec{
+    {Code: "root", Kind: models.Directory, Title: "订单"},
+    {Code: "list", Parent: "root", Kind: models.Menu, Title: "订单列表",
+        Path: "/order", Component: "apps/order/index", ApiCodes: []string{"list"}},
+}, []seed.ApiSpec{
+    {Code: "list", Title: "订单列表", Path: "/api/v1/order", Method: "GET"},
+})
+```
+
+`Kind` 用的就是 `sdk/contract/models` 里 `sys_menu.menu_type` 的那三个值
+（`Directory` / `Menu` / `Button`），不是另一套同值的常量。
+
+`Component` 的写法见上面「前端」一节——**这里是最容易写错的一个字段**。
+
+core 里**没有** `SysMenu`、没有 `SysApi`、没有任何表名。这是刻意划的边界：
+这个框架的宿主里本来就已经有两份 `SysMenu`（一份冻结在迁移期、一份运行期），
+两者在软删语义上不一致，害过人，为此专门建了一个仓库内的工具来守。
+往 core 里再放第三份表结构，就等于在**唯一没有工具守着**的地方重造同一类 bug。
+
+### `Sort` 有上界，越界会中断整场迁移
+
+`sys_menu.sort` 声明为 `gorm:"size:4"`，MySQL 据此建成 **tinyint，取值 -128..127**。
+sqlite 忽略宽度，所以越界值在本地测试里一路绿灯，到真实安装时是 Error 1264 ——
+而且发生在一次迁移的**中途**，后面的迁移全部不再执行。
+
+`make checksilent` 的 `menu-sort-overflow` 会扫出仓库树里的越界字面量，
+**但它扫不到 module cache 里的应用**。外置应用只有宿主 Seeder 的运行期校验兜底。
+
+### `MenuSpec` 没有菜单名字段，名字由宿主合成
+
+前端用菜单名做 keep-alive 的缓存键。两个应用如果都取 `Code: "list"`，
+缓存键就会撞在一起 —— 后打开的那个页面会拿到前一个的缓存实例。
+
+所以宿主的 Seeder 不直接用 `Code` 当菜单名，而是用
+**PascalCase(appCode) + PascalCase(Code)** 合成（`order` + `list` → `OrderList`）。
+你不需要做什么，但要知道两件事：
+
+- 菜单名不是你能指定的，也不必与 `Title` 一致 —— `Title` 才是界面上显示的文字
+- 前端组件的 `name` 若要与菜单名对齐（`checksilent` 的 `menu-name-mismatch` 会比对），
+  按合成后的名字写，不是按 `Code`
+
+---
+
+## 应用配置节
+
+不要改宿主的源码去加配置。`sdk/config.RegisterExtend` 让你认领
+`extend:` 下自己那一节：
+
+```go
+type orderConfig struct {
+    PaymentEndpoint string
+    Timeout         int
+}
+
+// 在 init() 里调，与 SetAppRouters / ForApp 同一约定
+var getOrderConfig = config.RegisterExtend[orderConfig]("order")
+
+func handler(c *gin.Context) {
+    cfg := getOrderConfig()
+    _ = cfg.PaymentEndpoint
+}
+```
+
+```yaml
+extend:
+  order:
+    PaymentEndpoint: https://payment.internal
+    Timeout: 30
+```
+
+每个 key 各自解码，互不覆盖。**同一个 key 注册两次会立刻 panic**——
+注册期没有"封闭时刻"可以用来拒绝迟到的注册，所以重复只能在注册的那一刻
+大声报出来，而不是让第二个人静默顶掉第一个人的配置节。
+
+配置文件是被监听的，改动会触发重载。`RegisterExtend` 每次重载解码进一个全新的
+`T` 再原子换指针，所以访问器拿到的永远是一个自洽的快照，请求路径上读它不需要加锁。
+唯一要注意的：**不要跨两次调用拼一个视图**——从同一个返回值上读两个字段是一致的，
+调两次访问器各读一个字段，中间夹一次重载就不是了。
+
+---
+
 ## 硬约束：注册要赶在启动钩子之前
 
 三个注册入口——`AppRouters`、`sdk.Runtime.SetAppRouters`、`migration.ForApp`——
@@ -153,18 +641,16 @@ go-admin migrate --app crm -c config/settings.yml       # 只跑 crm 的迁移
 
 `init()` 是最省事的位置：Go 规范保证包级变量初始化与 `init()` 在 `main()` 之前
 **单 goroutine 顺序执行**，注册期天然没有并发写。但它不是唯一合法位置——
-在 `run()` 之类早于启动钩子的地方注册同样成立。这条规则约束的是**顺序**，
-不是你写在哪个函数里。
+在 `run()` 之类早于启动钩子的地方注册同样成立。**这条规则约束的是顺序，
+不是你写在哪个函数里。**
 
-`sdk.Runtime.SetAppRouters` 的准确语义以 core 为准：
+想在代码里判断注册窗口是否还开着：
 
-> [go-admin-core `docs/contract.md`](https://github.com/go-admin-team/go-admin-core/blob/main/docs/contract.md)
+```go
+if sdk.Runtime.AppRoutersSealed() { /* RunAppRouters 已经跑过了 */ }
+```
 
-那份文档写明了注册类与资源类的划分、封闭时刻、护栏边界（**只覆盖同步 panic，
-你自己 `go func()` 出去的 panic 框架够不着**）、以及配置热更新会在运行期
-重新执行 setup 回调这件事。
-
-主仓这边只补三条它管不着的：
+主仓这边补三条 core 那份文档管不着的：
 
 1. **`RunAppRouters()` 跑过之后，core 的注册表就封闭了**，再调
    `sdk.Runtime.SetAppRouters` 会被丢弃并记一条 ERROR 日志。包级 `AppRouters`
@@ -181,19 +667,142 @@ go-admin migrate --app crm -c config/settings.yml       # 只跑 crm 的迁移
    ```
 
    `cmd/api/server_test.go` 里的 `freshRuntime` 就是这个。
-3. **`migration.ForApp` 是主仓的东西**，core 不认识它，上面那份文档不覆盖它。
-   它的约束仍然是"注册要在迁移调度循环跑起来之前"，实践上就是 `init()`。
+3. **迁移的调度循环是主仓的东西**，core 只有注册面。迁移注册的约束仍然是
+   "赶在调度循环跑起来之前"，实践上就是 `init()`。
+
+---
+
+## 生命周期挂载点
+
+除了注册路由和迁移，应用还可以把工作挂在进程生命的四个时点上，不必等宿主按名字来调自己。
+契约本身在 core，见
+[go-admin-core `docs/contract.md`](https://github.com/go-admin-team/go-admin-core/blob/main/docs/contract.md)
+的「Life-cycle phases」一节。这里只写**在本仓里它们分别落在哪一行**。
+
+| 阶段 | 在 `cmd/api/server.go` 的位置 | 此时可用 |
+|---|---|---|
+| `AfterResource` | `bootstrap.SetupConfig` 跑完 `database.Setup` / `storage.Setup` 之后 | 配置、库、缓存、队列、casbin |
+| `BeforeRouter` | `initRouter()` **之前** | 以上，加引擎尚未构建这一事实 |
+| `AfterListen` | `startServing()` 里，`net.Listen` 返回之后 | 全部，端口**已绑定**、连接进得来 |
+| `BeforeExit` | `srv.Shutdown` 返回之后（无论它是否报错） | 全部，正在被拆掉 |
+
+`AfterListen` 承诺的是**端口已绑定**，不是「`Serve` 已经在 accept 循环里」——
+`srv.Serve` 在另一个 goroutine 上。这个区别是真实的：绑定成功之后内核就会把连接排进
+backlog，所以钩子里去连自己的端口不会被拒;但此刻 `Serve` 可能还没跑到第一次 `Accept`。
+绑定失败则**根本不会有这个阶段**：`net.Listen` 的错误直接从 `run()` 返回，
+横幅不打印，进程非零退出。
+
+```go
+sdk.Runtime.SetPhase(runtime.AfterResource, func() { /* ... */ })
+sdk.Runtime.SetShutdown(func(ctx context.Context) { /* ... */ })
+```
+
+### `BeforeRouter` 不等于 `before` 注册表
+
+**这两个不是同一个时点，文档里别混着写。** `SetBefore` 的回调由
+`runStartupHooks()` 执行，而那是在 `initRouter()` **之后**——引擎已经建好了。
+`BeforeRouter` 在它之前。
+
+顺带：`BeforeRouter` 是「硬约束：注册要赶在启动钩子之前」那一节所说的合法注册窗口之一。
+它早于 `runStartupHooks()`，所以在这里调 `sdk.Runtime.SetAppRouters` 仍然来得及。
+
+### `AfterResource` 会跑很多次，回调必须扛得住
+
+它在**每次配置热更新之后**都会再跑一遍，因为热更新会重建它所命名的那些资源。
+所以这里的回调要求是**「对同一个资源幂等」，不是「第二次什么都不做」**。
+
+本仓自己的队列消费者就是这条规则的样板，也是它存在的理由
+（`cmd/api/server.go` 的 `attachQueueConsumers`）：
+
+- 热更新重建了队列适配器，挂在旧适配器上的消费者连着一个**再没人往里发消息**的队列，
+  登录日志和操作日志就此停写且不出声。所以新适配器**必须**重新注册。
+- 但同一个适配器不能注册两次，否则每条消息有两个消费者，每行日志写两遍。
+
+**身份不能从访问器取。** `sdk.Runtime.GetQueueAdapter()` 与 `GetQueuePrefix()`
+每次调用都新造一个 `runtime.Queue` 包装，比较两次返回等于比较两个包装，
+**底层适配器换过多少次都不相等**。要在**创建资源的地方**记身份——
+本仓是 `common/storage.QueueGeneration()`。
+
+### 注册消费者要赶在队列启动之前
+
+走哪条实现，取决于配置里有没有 `redis:` 段（`config.QueueConfig.Setup()`）：
+
+| 配置 | 实际类型 | 启动后还能注册吗 |
+|---|---|---|
+| `queue: memory:` | `queue.NewMemory` | **能**。它的 `Register` 每次起一个消费 goroutine，不看是否已 `Run` |
+| `queue: redis:` | `storage.LegacyQueueAdapter` 包着新契约实现 | **不能**。`Register` 内部调 `Subscribe`，启动后返回 `storage.ErrQueueAlreadyStarted` |
+
+而 `LegacyQueueAdapter.Register` **没有返回值**——它只能把这个错误写进 slog，
+core 里那行注释自己写着「The interface has no way to report this to the caller」。
+**静默的是注册这一步，不是之后。** 没有建立消费组，redis 会用
+`storage.ErrNoHandler` 拒绝**之后的每一次投递**，而本仓两个调用点
+（`common/middleware/logger.go`、`common/middleware/handler/auth.go`）
+都把它记为 error——于是日志行一条都不落库，同时每个请求刷一条错误日志。
+
+所以顺序是硬的：**先 `Register` 完，再由注册方 `Run()`。**
+`common/storage` 的 `setupQueue` 有意不启动队列。
+
+默认配置选的是 memory 后端,它不在乎顺序——**这个缺陷在默认部署里看不见,
+只在配了 redis 的部署上发作**,而丢掉的正是登录日志、操作日志和 api 检查。
+
+### `BeforeExit` 反序执行，预算约束的是等待
+
+清理按**注册的逆序**执行。`SetShutdown` 拿到宿主剩余的预算，
+但**它约束的是等待，不是工作**：预算用尽时 `RunShutdown` 停止等待并返回，
+而不检查 context 的回调会一直跑到进程退出。Go 没法取消一个不检查取消的函数。
+
+本仓的样板是 cron（`app/jobs/jobbase.go` 的 `startCrontab`）：
+`cron.Stop()` 返回一个在**已经在跑的任务结束时**关闭的 context，
+钩子在它和预算之间二选一。
+
+---
+
+## 安全边界：装一个应用等于信任它
+
+**这一层划不出安全边界，本文不假装划得出。**
+
+第三方应用的代码在**宿主进程内**运行，与宿主**同权限**。它持有的是裸的
+`*gorm.DB`——`seed.SeedMenus` 用的就是你自己迁移里那个 `tx`，绕开 `Seeder`
+直写 `sys_menu`、`sys_api`、甚至 `casbin_rule` 一直都做得到，Go 的类型系统
+拦不住，本框架的任何一层也拦不住。
+
+还有一条**不碰 `casbin_rule` 也能走通**的间接路径：把自己的菜单通过
+`ApiCodes` 关联到别人的接口，然后等管理员在后台把这个菜单授权给某个角色——
+策略是后台自己生成的，记在管理员头上。
+
+所以：
+
+> **装一个应用，等于信任它。** 这和 `import _` 一个 Go 库是同一量级的信任。
+> `Seeder` 这类设计的目的是让**守规矩的应用不必知道宿主的表结构**，
+> 不是把不守规矩的应用关起来。
+
+给使用者的实际建议只有一条：**按信任 Go 依赖的标准来审应用**——看源码、
+钉版本、认作者。不要因为它叫"应用"就以为它跑在沙箱里。
 
 ---
 
 ## 边界由 CI 守着
 
-`common/`、`core/` 不得 import `app/`，这条由 `tools/checksilent` 的
-`contract-import-boundary` 检查固化，`make checksilent` 在 CI 里跑，违反即失败
-（测试文件同样算 —— 一个删掉 `app/admin` 的 fork 也应该能跑 `go test ./...`）。
+`tools/checksilent` 里有两条盯契约面的检查，`make checksilent` 在 CI 里跑，
+命中 ERROR 即失败：
 
-靠人工评审列契约面会漏。上面那两处反向依赖里，第二处就是评审没发现、
-靠机器全量扫描才找出来的。
+| 检查 | 盯的是 |
+|---|---|
+| `contract-import-boundary` | `common/`、`core/` 不得 import `app/`——否则一个删掉 `app/admin` 的 fork 就编译不了它被告知可以依赖的那一面 |
+| `contract-shim-alias` | 从 core 契约包声明出来的类型必须是**别名**（`type X = pkg.Y`），不能是 defined type。判据是右手边，不是一份包名清单，所以谁在哪加的都算 |
 
-`tools/checksilent` 还检查另外五类"不出声的失败"，写模块时值得先看一眼
-`go run ./tools/checksilent -h`。
+第二条守的是一条一个字符的差别。`type X = pkg.Y` 和 `type X pkg.Y`
+看着几乎一样，但后者只拿走底层结构、**丢掉整个方法集**，于是嵌了它的 model
+不再满足 `ActiveRecord`。麻烦在于这**不一定在本仓编译失败**——本仓只用接口
+使唤其中一部分类型，没被使唤到的那些在这里编译得好好的，
+**到第三方应用或某个 fork 里才炸**，而那里没人看着。
+
+测试文件同样算——一个删掉 `app/admin` 的 fork 也应该能跑 `go test ./...`。
+
+**这两条工具都只扫仓库树。** 装在 module cache 里的第三方应用，
+`checksilent` 一个文件都看不到。所以它保的是**这个仓库和它的 fork**，
+不是你的应用——你的应用要自己跑自己的检查。
+
+`checksilent` 还检查其他几类"不出声的失败"，写模块时值得先看一眼
+`AGENTS.md` 的「静默失败校验」一节，或者 `tools/checksilent/checks.go` 里的
+`runChecks`（`-h` 只打印命令行参数，不列检查）。

example/app-order/apis/order.go

@@ -0,0 +1,167 @@
+// Package apis is app-order's HTTP layer: four hand-written gin handlers,
+// none of them a wrapper around core's generic CRUD Actions. See
+// service/order.go's package doc for why.
+package apis
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gin-gonic/gin/binding"
+
+	"github.com/go-admin-team/go-admin-core/v2/jwtauth/user"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/api"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/actions"
+
+	// models.Response in the @Success annotations below resolves to
+	// go-admin-core's sdk/contract/models.Response, not to this package -
+	// swaggo finds it through --parseDependency. It is the envelope with a
+	// data field; core's response.Response, which the framework's own
+	// handlers name, has no data field and would document these endpoints
+	// as returning none.
+	"github.com/go-admin-team/example-app-order/models"
+	"github.com/go-admin-team/example-app-order/service"
+	orderdto "github.com/go-admin-team/example-app-order/service/dto"
+)
+
+// Order embeds api.Api the same way every hand-written go-admin handler
+// does (see app/admin/apis/sys_post.go): MakeContext/MakeOrm/Bind/
+// MakeService/OK/Error/PageOK are all core, imported with no dependency on
+// go-admin itself.
+type Order struct {
+	api.Api
+}
+
+// GetPage
+// @Summary List orders visible to the caller's data scope
+// @Tags order
+// @Param status query string false "status"
+// @Param orderNo query string false "orderNo"
+// @Param pageIndex query int false "pageIndex"
+// @Param pageSize query int false "pageSize"
+// @Success 200 {object} models.Response
+// @Router /api/v1/order [get]
+// @Security Bearer
+func (e Order) GetPage(c *gin.Context) {
+	s := service.Order{}
+	req := orderdto.OrderSearchReq{}
+	err := e.MakeContext(c).
+		MakeOrm().
+		Bind(&req, binding.Form).
+		MakeService(&s.Service).
+		Errors
+	if err != nil {
+		e.Error(http.StatusUnprocessableEntity, err, err.Error())
+		return
+	}
+
+	p := actions.GetPermissionFromContext(c)
+	list := make([]models.Order, 0)
+	count, err := s.GetPage(&req, p, &list)
+	if err != nil {
+		e.Logger.Error(err)
+		e.Error(http.StatusInternalServerError, err, "failed to list orders")
+		return
+	}
+	e.PageOK(list, int(count), req.GetPageIndex(), req.GetPageSize(), "ok")
+}
+
+// Get
+// @Summary Get one order and its items
+// @Tags order
+// @Param id path int true "order id"
+// @Success 200 {object} models.Response
+// @Router /api/v1/order/{id} [get]
+// @Security Bearer
+func (e Order) Get(c *gin.Context) {
+	s := service.Order{}
+	req := orderdto.OrderIdReq{}
+	err := e.MakeContext(c).
+		MakeOrm().
+		Bind(&req, nil).
+		MakeService(&s.Service).
+		Errors
+	if err != nil {
+		e.Error(http.StatusUnprocessableEntity, err, err.Error())
+		return
+	}
+
+	p := actions.GetPermissionFromContext(c)
+	var order models.Order
+	if err = s.Get(req.Id, p, &order); err != nil {
+		e.Error(http.StatusNotFound, err, "order not found")
+		return
+	}
+	e.OK(order, "ok")
+}
+
+// Create
+// @Summary Place a new order
+// @Tags order
+// @Accept application/json
+// @Param data body orderdto.OrderCreateReq true "data"
+// @Success 200 {object} models.Response
+// @Router /api/v1/order [post]
+// @Security Bearer
+func (e Order) Create(c *gin.Context) {
+	s := service.Order{}
+	req := orderdto.OrderCreateReq{}
+	err := e.MakeContext(c).
+		MakeOrm().
+		Bind(&req, binding.JSON).
+		MakeService(&s.Service).
+		Errors
+	if err != nil {
+		e.Error(http.StatusUnprocessableEntity, err, err.Error())
+		return
+	}
+
+	order, err := s.Create(&req, user.GetUserId(c))
+	if err != nil {
+		if errors.Is(err, service.ErrOrderEmpty) {
+			e.Error(http.StatusBadRequest, err, err.Error())
+			return
+		}
+		e.Logger.Error(err)
+		e.Error(http.StatusInternalServerError, err, "failed to create order")
+		return
+	}
+	e.OK(order, "created")
+}
+
+// Pay
+// @Summary Mark a pending order as paid
+// @Tags order
+// @Param id path int true "order id"
+// @Success 200 {object} models.Response
+// @Router /api/v1/order/{id}/pay [put]
+// @Security Bearer
+func (e Order) Pay(c *gin.Context) {
+	s := service.Order{}
+	req := orderdto.OrderIdReq{}
+	err := e.MakeContext(c).
+		MakeOrm().
+		Bind(&req, nil).
+		MakeService(&s.Service).
+		Errors
+	if err != nil {
+		e.Error(http.StatusUnprocessableEntity, err, err.Error())
+		return
+	}
+
+	p := actions.GetPermissionFromContext(c)
+	if err = s.Pay(req.Id, p); err != nil {
+		if errors.Is(err, service.ErrOrderNotPending) {
+			// Deliberately the same response whether the order does not
+			// exist, is already paid, or is outside p's data scope - see
+			// service.Order.Pay's doc comment.
+			e.Error(http.StatusConflict, err, err.Error())
+			return
+		}
+		e.Logger.Error(err)
+		e.Error(http.StatusInternalServerError, err, "payment failed")
+		return
+	}
+	e.OK(nil, "paid")
+}

example/app-order/go.mod

@@ -0,0 +1,81 @@
+module github.com/go-admin-team/example-app-order
+
+go 1.25.13
+
+require (
+	github.com/gin-gonic/gin v1.12.0
+	github.com/glebarez/sqlite v1.11.0
+	github.com/go-admin-team/go-admin-core/v2 v2.5.0
+	gorm.io/gorm v1.31.2
+)
+
+require (
+	dario.cat/mergo v1.0.2 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
+	github.com/andeya/ameda v1.5.3 // indirect
+	github.com/andeya/goutil v1.0.1 // indirect
+	github.com/bitly/go-simplejson v0.5.1 // indirect
+	github.com/bmatcuk/doublestar/v4 v4.9.1 // indirect
+	github.com/bytedance/go-tagexpr/v2 v2.9.11 // indirect
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
+	github.com/casbin/casbin/v3 v3.8.1 // indirect
+	github.com/casbin/govaluate v1.10.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/chanxuehong/rand v0.0.0-20211009035549-2f07823e8e99 // indirect
+	github.com/chanxuehong/wechat v0.0.0-20230222024006-36f0325263cd // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
+	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/glebarez/go-sqlite v1.22.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.30.1 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/nyaruka/phonenumbers v1.2.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
+	github.com/quic-go/quic-go v0.59.1 // indirect
+	github.com/redis/go-redis/v9 v9.22.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
+	github.com/sirupsen/logrus v1.9.4 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.1 // indirect
+	go.mongodb.org/mongo-driver/v2 v2.5.0 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	go.uber.org/multierr v1.10.0 // indirect
+	go.uber.org/zap v1.27.1 // indirect
+	golang.org/x/arch v0.22.0 // indirect
+	golang.org/x/crypto v0.53.0 // indirect
+	golang.org/x/exp v0.0.0-20251219203646-944ab1f22d93 // indirect
+	golang.org/x/net v0.56.0 // indirect
+	golang.org/x/sys v0.46.0 // indirect
+	golang.org/x/text v0.39.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gorm.io/plugin/soft_delete v1.2.1 // indirect
+	modernc.org/libc v1.67.4 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+	modernc.org/sqlite v1.42.2 // indirect
+)

example/app-order/go.sum

@@ -0,0 +1,252 @@
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example/app-order/migration/migration.go

@@ -0,0 +1,89 @@
+// Package migration registers app-order's one migration: create its two
+// tables and seed the menu/API entries the admin UI needs to expose them.
+//
+// It registers through contract/migration.ForApp - the package-level
+// facade, not a private NewRegistry() - because that is the only registry a
+// third-party app, which cannot reach into the host process, can register
+// against and have any hope of the host's own execution engine picking up.
+// Whether it actually does, today, is a different question: see this
+// package's test file and the gap list in the accompanying report.
+package migration
+
+import (
+	"gorm.io/gorm"
+
+	contractmigration "github.com/go-admin-team/go-admin-core/v2/sdk/contract/migration"
+	contractmodels "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/seed"
+
+	"github.com/go-admin-team/example-app-order/models"
+)
+
+// AppCode is app-order's migration.ForApp / seed.SeedMenus identity.
+const AppCode = "order"
+
+// version is this migration's sys_migration key before ForApp namespaces
+// it (see contract/migration.ForApp's doc comment: the stored key becomes
+// "order-" + version). It follows the framework's own 13-digit millisecond
+// timestamp convention purely so a human reading sys_migration.version
+// alongside the framework's own rows can still eyeball roughly when it was
+// authored; contract/migration.ForApp does not require that shape, just
+// uniqueness within this app's own namespace.
+const version = "1793800000000"
+
+func init() {
+	contractmigration.ForApp(AppCode).SetVersion(version, createOrderSchema)
+}
+
+// createOrderSchema creates app_order/app_order_item and seeds the menu and
+// API entries a host's Seeder turns into sys_menu/sys_api/sys_menu_api_rule
+// rows (and, once an administrator grants the menu to a role through the
+// ordinary admin UI, casbin_rule). See seed.Seeder's security note: this
+// call does not sandbox anything, it only saves app-order from needing to
+// know go-admin's own schema.
+func createOrderSchema(db *gorm.DB, migrationVersion, appCode string) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		if err := tx.AutoMigrate(&models.Order{}, &models.OrderItem{}); err != nil {
+			return err
+		}
+
+		menus := []seed.MenuSpec{
+			{
+				Code: "dir", Kind: contractmodels.Directory,
+				Title: "Order Example", Path: "/apps/order", Component: "Layout",
+				Icon: "shopping", Sort: 20,
+			},
+			{
+				Code: "list", Parent: "dir", Kind: contractmodels.Menu,
+				Title: "Orders", Path: "list",
+				// Component must start with "apps/<code>/" - see
+				// seed.MenuSpec.Component's doc comment. This is the one
+				// concrete rule the report's gap list has nothing bad to
+				// say about: it is documented exactly where a caller
+				// building a MenuSpec would look.
+				Component: "apps/order/order/index",
+				Sort:      1,
+				ApiCodes:  []string{"list", "get", "create", "pay"},
+			},
+			{
+				Code: "btn-create", Parent: "list", Kind: contractmodels.Button,
+				Title: "Create", Permission: "order:order:create", Sort: 1,
+			},
+			{
+				Code: "btn-pay", Parent: "list", Kind: contractmodels.Button,
+				Title: "Pay", Permission: "order:order:pay", Sort: 2,
+			},
+		}
+		apis := []seed.ApiSpec{
+			{Code: "list", Title: "Order list", Path: "/api/v1/order", Method: "GET", Handle: "apis.Order.GetPage-fm"},
+			{Code: "get", Title: "Order detail", Path: "/api/v1/order/:id", Method: "GET", Handle: "apis.Order.Get-fm"},
+			{Code: "create", Title: "Create order", Path: "/api/v1/order", Method: "POST", Handle: "apis.Order.Create-fm"},
+			{Code: "pay", Title: "Pay order", Path: "/api/v1/order/:id/pay", Method: "PUT", Handle: "apis.Order.Pay-fm"},
+		}
+		if err := seed.SeedMenus(tx, appCode, menus, apis); err != nil {
+			return err
+		}
+
+		return tx.Create(&contractmodels.Migration{Version: migrationVersion, AppCode: appCode}).Error
+	})
+}

example/app-order/migration/migration_test.go

@@ -0,0 +1,153 @@
+package migration
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	contractmigration "github.com/go-admin-team/go-admin-core/v2/sdk/contract/migration"
+	contractmodels "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/seed"
+
+	"github.com/go-admin-team/example-app-order/models"
+)
+
+// fakeSeeder stands in for a host's real Seeder (the one wt-shim, as of
+// this writing, never registers - see the accompanying report's gap list).
+// It records what it received instead of writing to any table, which is
+// enough to check app-order's own MenuSpec/ApiSpec assembly without
+// depending on go-admin's sys_menu/sys_api schema.
+type fakeSeeder struct {
+	appCode string
+	menus   []seed.MenuSpec
+	apis    []seed.ApiSpec
+}
+
+func (f *fakeSeeder) SeedMenus(tx *gorm.DB, appCode string, menus []seed.MenuSpec, apis []seed.ApiSpec) error {
+	f.appCode = appCode
+	f.menus = menus
+	f.apis = apis
+	return nil
+}
+
+// seed.RegisterSeeder panics on a second call in the same process (see its
+// doc comment) - by design, there is no public way to unregister one. This
+// package's tests share the one registration below rather than each
+// registering their own.
+var fake = &fakeSeeder{}
+
+func init() {
+	seed.RegisterSeeder(fake)
+}
+
+// TestRegistersUnderContractMigrationForApp is this package's core claim:
+// that createOrderSchema is reachable through contract/migration's
+// package-level Snapshot, the only registry a third-party module can
+// register against. It does not confirm any host actually calls Snapshot
+// today - see the report.
+func TestRegistersUnderContractMigrationForApp(t *testing.T) {
+	entries := contractmigration.Snapshot()
+	entry, ok := entries[AppCode+"-"+version]
+	if !ok {
+		t.Fatalf("no entry for %s-%s; registered: %v", AppCode, version, keysOf(entries))
+	}
+	if entry.AppCode != AppCode {
+		t.Errorf("Entry.AppCode = %q, want %q", entry.AppCode, AppCode)
+	}
+}
+
+func keysOf(m map[string]contractmigration.Entry) []string {
+	out := make([]string, 0, len(m))
+	for k := range m {
+		out = append(out, k)
+	}
+	return out
+}
+
+// TestMigrationCreatesTablesSeedsMenusAndRecordsItself runs the registered
+// migration function directly against a fresh sqlite database - standing in
+// for the host's execution engine, which (see the report) does not exist
+// yet for an externally-registered app. It is the closest thing to an
+// end-to-end run this example can do without wt-shim's cooperation.
+func TestMigrationCreatesTablesSeedsMenusAndRecordsItself(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("open sqlite: %v", err)
+	}
+	// sys_migration itself is created by the framework's own first
+	// migration (go-admin's cmd/migrate/migration/version/*_tables.go),
+	// which by the time any app's migration runs has always already run -
+	// simulate that precondition rather than app-order's own migration
+	// creating a table it does not own.
+	if err := db.AutoMigrate(&contractmodels.Migration{}); err != nil {
+		t.Fatalf("automigrate sys_migration: %v", err)
+	}
+
+	entries := contractmigration.Snapshot()
+	entry, ok := entries[AppCode+"-"+version]
+	if !ok {
+		t.Fatalf("no entry for %s-%s", AppCode, version)
+	}
+	if err := entry.Fn(db, AppCode+"-"+version); err != nil {
+		t.Fatalf("running the registered migration: %v", err)
+	}
+
+	if !db.Migrator().HasTable(&models.Order{}) {
+		t.Error("app_order was not created")
+	}
+	if !db.Migrator().HasTable(&models.OrderItem{}) {
+		t.Error("app_order_item was not created")
+	}
+
+	var migrationRow contractmodels.Migration
+	if err := db.Where("version = ?", AppCode+"-"+version).First(&migrationRow).Error; err != nil {
+		t.Fatalf("sys_migration row: %v", err)
+	}
+	if migrationRow.AppCode != AppCode {
+		t.Errorf("sys_migration.app_code = %q, want %q", migrationRow.AppCode, AppCode)
+	}
+
+	if fake.appCode != AppCode {
+		t.Errorf("Seeder saw appCode %q, want %q", fake.appCode, AppCode)
+	}
+	assertMenuGraphIsConsistent(t, fake.menus, fake.apis)
+}
+
+// assertMenuGraphIsConsistent checks the two rules that would otherwise
+// only surface as a broken admin UI at install time: every Parent
+// reference resolves to a Code in the same batch, and the frontend's
+// apps/<code>/ convention for a packaged page's Component (documented on
+// MenuSpec.Component, enforced by nothing - see the report) is actually
+// followed.
+func assertMenuGraphIsConsistent(t *testing.T, menus []seed.MenuSpec, apis []seed.ApiSpec) {
+	t.Helper()
+
+	codes := make(map[string]seed.MenuSpec, len(menus))
+	for _, m := range menus {
+		codes[m.Code] = m
+	}
+	apiCodes := make(map[string]bool, len(apis))
+	for _, a := range apis {
+		apiCodes[a.Code] = true
+	}
+
+	for _, m := range menus {
+		if m.Parent != "" {
+			if _, ok := codes[m.Parent]; !ok {
+				t.Errorf("menu %q has Parent %q, which is not a Code in this batch", m.Code, m.Parent)
+			}
+		}
+		for _, ac := range m.ApiCodes {
+			if !apiCodes[ac] {
+				t.Errorf("menu %q references ApiCode %q, which is not in this batch's apis", m.Code, ac)
+			}
+		}
+		if m.Kind == contractmodels.Menu && m.Component != "" {
+			if !strings.HasPrefix(m.Component, "apps/"+AppCode+"/") {
+				t.Errorf("menu %q has Component %q, want it to start with apps/%s/", m.Code, m.Component, AppCode)
+			}
+		}
+	}
+}

example/app-order/models/order.go

@@ -0,0 +1,52 @@
+// Package models holds app-order's two GORM row models.
+package models
+
+import (
+	contractmodels "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+)
+
+// The two values Order.Status can hold. Kept as narrow strings rather than
+// an int enum to match sys_role.data_scope's own convention in core, and to
+// leave room for a future status without a schema change.
+const (
+	StatusPending = "1" // awaiting payment
+	StatusPaid    = "2" // paid; set only by a successful Pay
+)
+
+// orderTable is passed to actions.Permission and repeated as
+// Order.TableName's return value. It is not literally the word "order":
+// that is a reserved SQL keyword, and actions.Permission builds its WHERE
+// clause by string-concatenating tableName straight into raw SQL
+// (`tableName+".create_by = ?"`, see permission.go) with no quoting at all.
+// A table named exactly "order" would make every data-scope query a syntax
+// error on MySQL's default (non-ANSI-quotes) mode. This is not something
+// core enforces or even mentions - Permission's tableName parameter is an
+// opaque string as far as it is concerned - so avoiding reserved words is
+// entirely on the caller.
+const orderTable = "app_order"
+
+// Order is one customer order. ControlBy is required, not decorative:
+// actions.Permission's data-scope SQL joins against create_by, so an Order
+// without it would make every data-scope rule silently match nothing.
+type Order struct {
+	contractmodels.Model
+
+	OrderNo    string `json:"orderNo" gorm:"type:varchar(64);uniqueIndex;comment:order number"`
+	UserId     int    `json:"userId" gorm:"index;comment:buyer user id"`
+	Status     string `json:"status" gorm:"type:varchar(4);index;comment:order status: 1 pending, 2 paid"`
+	TotalCents int64  `json:"totalCents" gorm:"comment:total amount in cents, sum of item price*quantity at creation time"`
+
+	// Items is populated by Preload; it is never set by Order's own migrator
+	// column set (OrderItem.OrderId is the foreign key, not a column here).
+	Items []OrderItem `json:"items,omitempty" gorm:"foreignKey:OrderId"`
+
+	contractmodels.ControlBy
+	contractmodels.ModelTime
+}
+
+// TableName pins the row model to app_order regardless of any global
+// singular/plural table naming strategy the host configures. See orderTable
+// above for why this is not simply "order".
+func (Order) TableName() string {
+	return orderTable
+}

example/app-order/models/order_item.go

@@ -0,0 +1,29 @@
+package models
+
+// orderItemTable mirrors orderTable's naming rationale: not a reserved word,
+// and namespaced under app_ so a host scanning its schema can tell at a
+// glance which tables an installed app owns.
+const orderItemTable = "app_order_item"
+
+// OrderItem is one line item of an Order. It carries no ControlBy of its
+// own: data-scope is enforced once, on the parent Order, and an item is
+// never queried on its own outside that parent (see service.Order.Get's
+// Preload).
+//
+// OrderId+ProductName is unique on purpose, not just to have some index: it
+// is what OrderService_test.go's mid-transaction-failure test relies on to
+// force a real constraint violation after the parent Order row has already
+// been inserted in the same transaction, proving the rollback actually
+// undoes both writes rather than leaving the Order behind.
+type OrderItem struct {
+	Id          int    `json:"id" gorm:"primaryKey;autoIncrement;comment:primary key"`
+	OrderId     int    `json:"orderId" gorm:"uniqueIndex:uk_app_order_item_product;comment:parent order id"`
+	ProductName string `json:"productName" gorm:"type:varchar(255);uniqueIndex:uk_app_order_item_product;comment:product name"`
+	Quantity    int    `json:"quantity" gorm:"comment:quantity"`
+	PriceCents  int64  `json:"priceCents" gorm:"comment:unit price in cents"`
+}
+
+// TableName pins the row model to app_order_item; see orderItemTable.
+func (OrderItem) TableName() string {
+	return orderItemTable
+}

example/app-order/router/router.go

@@ -0,0 +1,67 @@
+// Package router wires app-order's four routes onto a host's gin engine.
+package router
+
+import (
+	"github.com/gin-gonic/gin"
+
+	jwt "github.com/go-admin-team/go-admin-core/v2/jwtauth"
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/actions"
+	coreruntime "github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+
+	"github.com/go-admin-team/example-app-order/apis"
+)
+
+// RegisterRouter mounts app-order's routes under v1.
+//
+// Its signature - (v1 *gin.RouterGroup, authMiddleware *jwt.GinJWTMiddleware)
+// - is not app-order's own invention: it is the exact shape every in-tree
+// go-admin app router package already registers into its own routerCheckRole
+// slice (see app/demo/router/demo_product.go), so a host installs this
+// exactly where it installs its own app/*/router packages: one file under
+// cmd/api/ that imports this package and appends RegisterRouter (adjusted to
+// the host's own registration slice's calling convention) - see
+// cmd/api/demo.go for the pattern.
+//
+// authMiddleware is taken as an explicit parameter rather than fetched
+// through sdk.Runtime.GetHandlerFunc(coreruntime.JwtTokenCheck). As of this
+// writing the reference host (go-admin's common/middleware/init.go) registers
+// that key with an unbound method expression -
+// sdk.Runtime.SetMiddleware(JwtTokenCheck, (*jwt.GinJWTMiddleware).MiddlewareFunc)
+// - which is exactly the shape GetHandlerFunc's own doc comment warns
+// against: the stored value's type is func(*jwt.GinJWTMiddleware)
+// gin.HandlerFunc, not gin.HandlerFunc, so GetHandlerFunc's type assertion
+// fails and it reports ok=false every time, for every caller, not just this
+// one. Taking authMiddleware directly sidesteps that live bug and matches
+// what every in-tree app already does.
+func RegisterRouter(v1 *gin.RouterGroup, authMiddleware *jwt.GinJWTMiddleware) {
+	roleCheck, ok := sdk.Runtime.GetHandlerFunc(coreruntime.RoleCheck)
+	if !ok {
+		// A host that has not wired up RoleCheck has not wired up Casbin
+		// authorization at all. Registering these routes without it would
+		// silently serve every order to every authenticated caller
+		// regardless of role - fail loud at startup instead, the same way
+		// PermissionAction fails loud (Abort, not c.Next) when its own
+		// database lookup errors. See contract/actions.PermissionAction's
+		// doc comment for the same reasoning applied to data-scope instead
+		// of role.
+		panic("app-order: host has not registered core's " + coreruntime.RoleCheck +
+			" middleware (sdk.Runtime.SetMiddleware); refusing to mount unauthorized order routes")
+	}
+
+	e := apis.Order{}
+	r := v1.Group("/order").
+		Use(authMiddleware.MiddlewareFunc()).
+		Use(roleCheck)
+	{
+		// actions.PermissionAction is imported directly from core - a plain
+		// function, not something fetched through sdk.Runtime - because
+		// unlike RoleCheck's Casbin policy tables (host-owned; see
+		// contract/actions's package doc), the data-scope machinery it
+		// installs has no host-specific state at all.
+		r.GET("", actions.PermissionAction(), e.GetPage)
+		r.GET("/:id", actions.PermissionAction(), e.Get)
+		r.POST("", e.Create)
+		r.PUT("/:id/pay", actions.PermissionAction(), e.Pay)
+	}
+}

example/app-order/router/router_test.go

@@ -0,0 +1,80 @@
+package router
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+
+	jwt "github.com/go-admin-team/go-admin-core/v2/jwtauth"
+	"github.com/go-admin-team/go-admin-core/v2/sdk"
+	coreruntime "github.com/go-admin-team/go-admin-core/v2/sdk/runtime"
+)
+
+func testAuthMiddleware(t *testing.T) *jwt.GinJWTMiddleware {
+	t.Helper()
+	mw, err := jwt.New(&jwt.GinJWTMiddleware{
+		Realm:            "test",
+		Key:              []byte("test-signing-key"),
+		SigningAlgorithm: "HS256",
+		Timeout:          0,
+		TokenLookup:      "header: Authorization",
+		TokenHeadName:    "Bearer",
+	})
+	if err != nil {
+		t.Fatalf("building a test JWT middleware: %v", err)
+	}
+	return mw
+}
+
+// sdk.Runtime is a single process-wide instance (see its doc comment) with no
+// way to unregister a middleware key, so this test needs RoleCheck to be
+// unset - which makes it look order-dependent. It is not: the test that does
+// register RoleCheck puts it back in a t.Cleanup, and the guard below turns a
+// wrong order into a loud failure rather than a silent pass. Verified with
+// `go test -shuffle=<seed>` on seeds that run the two in either order.
+func TestRegisterRouterPanicsWithoutHostRoleCheck(t *testing.T) {
+	if _, ok := sdk.Runtime.GetHandlerFunc(coreruntime.RoleCheck); ok {
+		t.Fatal("RoleCheck is already registered; this test must run before any test that registers it")
+	}
+
+	defer func() {
+		if recover() == nil {
+			t.Fatal("RegisterRouter did not panic with no host RoleCheck middleware registered")
+		}
+	}()
+
+	gin.SetMode(gin.TestMode)
+	r := gin.New()
+	v1 := r.Group("/api/v1")
+	RegisterRouter(v1, testAuthMiddleware(t))
+}
+
+func TestRegisterRouterMountsRoutesOnceRoleCheckIsRegistered(t *testing.T) {
+	sdk.Runtime.SetMiddleware(coreruntime.RoleCheck, gin.HandlerFunc(func(c *gin.Context) { c.Next() }))
+	// sdk.Runtime has no way to unregister a middleware key (SetMiddleware
+	// only ever adds or overwrites - see its doc comment), so restore the
+	// "as far as GetHandlerFunc is concerned, unregistered" state other
+	// tests in this package depend on: a nil interface{} fails
+	// GetHandlerFunc's gin.HandlerFunc type assertion the same way a never-
+	// set key does. Needed for `go test -count=2` and similar re-runs
+	// within one process, not for a single run.
+	t.Cleanup(func() { sdk.Runtime.SetMiddleware(coreruntime.RoleCheck, nil) })
+
+	gin.SetMode(gin.TestMode)
+	r := gin.New()
+	v1 := r.Group("/api/v1")
+	RegisterRouter(v1, testAuthMiddleware(t))
+
+	// A route that exists returns something other than 404, even if the
+	// JWT/Casbin/PermissionAction chain in front of it then rejects the
+	// unauthenticated test request - proving RegisterRouter actually wired
+	// the route up is the point, not exercising the auth chain itself.
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/order", nil)
+	w := httptest.NewRecorder()
+	r.ServeHTTP(w, req)
+	if w.Code == http.StatusNotFound {
+		t.Errorf("GET /api/v1/order was not registered (404)")
+	}
+}

example/app-order/service/dto/order.go

@@ -0,0 +1,57 @@
+// Package dto holds app-order's request-binding types.
+//
+// None of them implement core's dto.Index / dto.Control, and none of them
+// define their own Bind method: those interfaces (and the Bind method they
+// require) exist so the framework's generic CRUD Actions
+// (Create/Delete/Index/Update/ViewAction) can bind a request without
+// knowing its concrete type - Action itself calls req.Bind(c). app-order's
+// handlers (apis/order.go) call api.Api.Bind directly on the raw struct
+// instead, exactly as go-admin's own hand-written handlers do (see
+// app/admin/apis/sys_post.go and its service/dto/sys_post.go, which is the
+// same shape: plain structs, no Bind method), so a Bind method here would
+// never be called by anything and would only mislead a reader into thinking
+// it is.
+//
+// What these types do reuse is dto.Pagination (for the list request's page
+// index/size) and the `search` struct-tag convention dto.MakeCondition
+// resolves; both are plain data shapes, not an interface a hand-written
+// handler would otherwise have to reimplement.
+package dto
+
+import (
+	contractdto "github.com/go-admin-team/go-admin-core/v2/sdk/contract/dto"
+)
+
+// OrderItemReq is one line item in a create-order request.
+type OrderItemReq struct {
+	ProductName string `json:"productName" validate:"required"`
+	Quantity    int    `json:"quantity" validate:"gte=1"`
+	PriceCents  int64  `json:"priceCents" validate:"gte=0"`
+}
+
+// OrderCreateReq is the create-order request body.
+type OrderCreateReq struct {
+	Items []OrderItemReq `json:"items" validate:"required"`
+}
+
+// OrderSearchReq is the list-order query.
+//
+// contractdto.MakeCondition reads q's `search` tags through
+// reflect.TypeOf(q).NumField(), which is only valid for a struct Kind - a
+// pointer panics rather than returning an error (see
+// service/order.go:GetPage, which is careful to pass *req, not req). That
+// distinction is not documented on MakeCondition's exported doc comment.
+// Pagination `search:"-"` here follows the same convention the framework's
+// own generic DTOs use to keep Pagination's two fields out of the WHERE
+// clause the tags on Status/OrderNo build.
+type OrderSearchReq struct {
+	contractdto.Pagination `search:"-"`
+
+	Status  string `form:"status" search:"type:exact;column:status;table:app_order"`
+	OrderNo string `form:"orderNo" search:"type:exact;column:order_no;table:app_order"`
+}
+
+// OrderIdReq binds a single :id, for a detail lookup or a Pay request.
+type OrderIdReq struct {
+	Id int `uri:"id" validate:"required"`
+}

example/app-order/service/order.go

@@ -0,0 +1,176 @@
+// Package service is app-order's business logic: everything the PRD asked
+// this example to prove out by hand rather than by wiring up core's generic
+// CRUD Actions (Create/Delete/Index/Update/ViewAction stay in go-admin, not
+// in core - see contract/actions's package doc for why). An order's write
+// path is a cross-table transaction and its one state change needs a
+// concurrency guard neither generic Action was ever built for, which is
+// exactly the class of logic real third-party apps almost always have.
+package service
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"gorm.io/gorm"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/actions"
+	contractdto "github.com/go-admin-team/go-admin-core/v2/sdk/contract/dto"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/service"
+
+	"github.com/go-admin-team/example-app-order/models"
+	orderdto "github.com/go-admin-team/example-app-order/service/dto"
+)
+
+// ErrOrderEmpty is returned by Create when the request has no line items.
+var ErrOrderEmpty = errors.New("app-order: an order must have at least one item")
+
+// ErrOrderNotPending is returned by Pay when the order could not be paid:
+// it does not exist, it is not in models.StatusPending, or the caller's
+// data scope does not include it. Deliberately one error for all three -
+// see Pay's doc comment for why collapsing them is the fail-closed choice,
+// not a shortcut.
+var ErrOrderNotPending = errors.New("app-order: order is not awaiting payment")
+
+// Order is app-order's hand-written service. It embeds core's
+// sdk/service.Service purely for the Orm/Log/Cache fields every
+// api.Api.MakeService caller already wires up the same way go-admin's own
+// hand-written services do (see app/admin/apis/sys_post.go) - not because
+// anything here calls a method Service defines.
+type Order struct {
+	service.Service
+}
+
+// Create places a new order. The order row and every item row commit
+// together: db.Transaction's closure form is what makes that true even
+// across a panic (it recovers, rolls back, and re-panics - see gorm's own
+// Transaction implementation), unlike the hand-rolled Begin/defer pattern
+// go-admin's sys_role.go/sys_dept.go/sys_menu.go/sys_tables.go use, which
+// commits a half-written transaction on panic, never opens a real
+// transaction under sqlite, and reads a single global DB handle regardless
+// of which tenant the request is for.
+func (e *Order) Create(req *orderdto.OrderCreateReq, userId int) (*models.Order, error) {
+	if len(req.Items) == 0 {
+		return nil, ErrOrderEmpty
+	}
+
+	items := make([]models.OrderItem, 0, len(req.Items))
+	var total int64
+	for _, it := range req.Items {
+		total += it.PriceCents * int64(it.Quantity)
+		items = append(items, models.OrderItem{
+			ProductName: it.ProductName,
+			Quantity:    it.Quantity,
+			PriceCents:  it.PriceCents,
+		})
+	}
+
+	order := &models.Order{
+		OrderNo:    generateOrderNo(),
+		UserId:     userId,
+		Status:     models.StatusPending,
+		TotalCents: total,
+	}
+	order.SetCreateBy(userId)
+	order.SetUpdateBy(userId)
+
+	err := e.Orm.Transaction(func(tx *gorm.DB) error {
+		if err := tx.Create(order).Error; err != nil {
+			return err
+		}
+		for i := range items {
+			items[i].OrderId = order.Id
+		}
+		// A single batch Create, not one Create per item: on the unique
+		// (order_id, product_name) violation the test suite exercises, the
+		// whole statement fails, and nothing about this order - not the
+		// order row created two lines above, not any item before the
+		// duplicate - survives the rollback.
+		if err := tx.Create(&items).Error; err != nil {
+			return err
+		}
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	order.Items = items
+	return order, nil
+}
+
+// Get loads one order, scoped to p's data permission, with its items.
+func (e *Order) Get(id int, p *actions.DataPermission, out *models.Order) error {
+	return e.Orm.
+		Scopes(actions.Permission(orderTableName, p)).
+		Preload("Items").
+		Where("id = ?", id).
+		First(out).Error
+}
+
+// GetPage lists orders visible to p's data scope, filtered by req's search
+// tags and paginated. The Find-then-Count-on-the-same-chain shape mirrors
+// go-admin's own common/actions.IndexAction: Limit(-1).Offset(-1) undoes
+// Paginate's LIMIT/OFFSET before the count runs, on the same *gorm.DB
+// session, so the WHERE clause built by MakeCondition and Permission is not
+// re-resolved a second time.
+func (e *Order) GetPage(req *orderdto.OrderSearchReq, p *actions.DataPermission, list *[]models.Order) (int64, error) {
+	var count int64
+	// *req, not req: contractdto.MakeCondition resolves search tags through
+	// reflect.TypeOf(q).NumField(), which panics on a pointer. See
+	// service/dto/order.go's doc comment on OrderSearchReq.
+	err := e.Orm.Model(&models.Order{}).
+		Scopes(
+			contractdto.MakeCondition(*req),
+			contractdto.Paginate(req.GetPageSize(), req.GetPageIndex()),
+			actions.Permission(orderTableName, p),
+		).
+		Find(list).Limit(-1).Offset(-1).
+		Count(&count).Error
+	return count, err
+}
+
+// Pay transitions a pending order to paid.
+//
+// The concurrency guard is the WHERE clause, not an application-level lock:
+// two concurrent payment attempts against the same order both issue this
+// UPDATE, but only the one that actually flips a row from pending to paid
+// sees RowsAffected == 1 - the loser's WHERE matches nothing (the row is
+// already 'paid' by the time its UPDATE runs) and sees 0, becoming
+// ErrOrderNotPending rather than a second, silently-accepted payment.
+//
+// The same RowsAffected==0 outcome also covers "no such order" and "this
+// order exists but is outside p's data scope" - actions.Permission's own
+// scope is one of the Scopes below, so a caller paying an order they
+// cannot see gets the identical error a caller paying an already-paid
+// order gets. That collapse is deliberate: a distinguishable "exists but
+// not yours" response would leak which order ids exist to a caller who
+// should not be able to tell.
+func (e *Order) Pay(id int, p *actions.DataPermission) error {
+	result := e.Orm.
+		Scopes(actions.Permission(orderTableName, p)).
+		Model(&models.Order{}).
+		Where("id = ? AND status = ?", id, models.StatusPending).
+		Updates(map[string]interface{}{"status": models.StatusPaid})
+	if result.Error != nil {
+		return result.Error
+	}
+	if result.RowsAffected == 0 {
+		return ErrOrderNotPending
+	}
+	return nil
+}
+
+// orderTableName is models.Order{}.TableName(), repeated here as a plain
+// string because actions.Permission takes the table name as a bare string,
+// not a model - see models/order.go's orderTable doc comment for why it is
+// not literally "order".
+const orderTableName = "app_order"
+
+// generateOrderNo is a placeholder good enough for this example: real
+// production code would want a collision-proof id source (a sequence, a
+// snowflake id, or similar). Nothing about the transaction or the
+// concurrency guard above depends on how this string is built.
+func generateOrderNo() string {
+	return fmt.Sprintf("ORD%d", time.Now().UnixNano())
+}

example/app-order/service/order_test.go

@@ -0,0 +1,352 @@
+package service
+
+import (
+	"errors"
+	"sync"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/gorm"
+
+	"github.com/go-admin-team/go-admin-core/v2/sdk/config"
+	"github.com/go-admin-team/go-admin-core/v2/sdk/contract/actions"
+	coreservice "github.com/go-admin-team/go-admin-core/v2/sdk/service"
+
+	"github.com/go-admin-team/example-app-order/models"
+	orderdto "github.com/go-admin-team/example-app-order/service/dto"
+)
+
+// testDB returns a fresh, isolated in-memory sqlite database with
+// app_order/app_order_item created, following the same
+// glebarez/sqlite-and-no-build-tag setup core's own contract package tests
+// use (see sdk/contract/actions/permission_test.go and
+// sdk/contract/seed/seed_test.go).
+func testDB(t *testing.T) *gorm.DB {
+	t.Helper()
+	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("open sqlite: %v", err)
+	}
+	if err := db.AutoMigrate(&models.Order{}, &models.OrderItem{}); err != nil {
+		t.Fatalf("automigrate: %v", err)
+	}
+	return db
+}
+
+// enableDataPermission flips on the switch actions.Permission checks before
+// applying any data-scope filtering at all, restoring the previous value
+// after the test - the same pattern
+// sdk/contract/actions/permission_test.go uses.
+func enableDataPermission(t *testing.T) {
+	t.Helper()
+	previous := config.ApplicationConfig.EnableDP
+	config.ApplicationConfig.EnableDP = true
+	t.Cleanup(func() { config.ApplicationConfig.EnableDP = previous })
+}
+
+func newOrderService(t *testing.T, db *gorm.DB) *Order {
+	t.Helper()
+	return &Order{Service: coreservice.Service{Orm: db}}
+}
+
+// -- cross-table transaction ------------------------------------------------
+
+func TestCreate_CommitsOrderAndItemsTogether(t *testing.T) {
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	req := &orderdto.OrderCreateReq{Items: []orderdto.OrderItemReq{
+		{ProductName: "widget", Quantity: 2, PriceCents: 500},
+		{ProductName: "gadget", Quantity: 1, PriceCents: 1200},
+	}}
+
+	order, err := s.Create(req, 42)
+	if err != nil {
+		t.Fatalf("Create: %v", err)
+	}
+	if order.TotalCents != 2*500+1200 {
+		t.Errorf("TotalCents = %d, want %d", order.TotalCents, 2*500+1200)
+	}
+	if order.Status != models.StatusPending {
+		t.Errorf("Status = %q, want pending", order.Status)
+	}
+	if order.CreateBy != 42 || order.UpdateBy != 42 {
+		t.Errorf("CreateBy/UpdateBy = %d/%d, want 42/42", order.CreateBy, order.UpdateBy)
+	}
+
+	var itemCount int64
+	db.Model(&models.OrderItem{}).Where("order_id = ?", order.Id).Count(&itemCount)
+	if itemCount != 2 {
+		t.Errorf("persisted %d items, want 2", itemCount)
+	}
+}
+
+func TestCreate_EmptyItemsReturnsErrorAndWritesNothing(t *testing.T) {
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	_, err := s.Create(&orderdto.OrderCreateReq{}, 1)
+	if !errors.Is(err, ErrOrderEmpty) {
+		t.Fatalf("got error %v, want ErrOrderEmpty", err)
+	}
+
+	var count int64
+	db.Model(&models.Order{}).Count(&count)
+	if count != 0 {
+		t.Errorf("an order was written despite the empty-items error")
+	}
+}
+
+// A mid-transaction failure must roll back everything written before it in
+// the same transaction, including the parent row. The duplicate product
+// name is what forces a real, DB-enforced constraint violation on the
+// second item's insert - see OrderItem's doc comment.
+func TestCreate_MidTransactionFailureRollsBackEverything(t *testing.T) {
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	req := &orderdto.OrderCreateReq{Items: []orderdto.OrderItemReq{
+		{ProductName: "widget", Quantity: 1, PriceCents: 100},
+		{ProductName: "widget", Quantity: 1, PriceCents: 100}, // duplicate: violates uk_app_order_item_product
+	}}
+
+	_, err := s.Create(req, 1)
+	if err == nil {
+		t.Fatal("Create succeeded despite a duplicate line item; the unique constraint did not fire")
+	}
+
+	var orderCount, itemCount int64
+	db.Model(&models.Order{}).Count(&orderCount)
+	db.Model(&models.OrderItem{}).Count(&itemCount)
+	if orderCount != 0 {
+		t.Errorf("the order row survived the rollback: %d rows in app_order", orderCount)
+	}
+	if itemCount != 0 {
+		t.Errorf("an item row survived the rollback: %d rows in app_order_item", itemCount)
+	}
+}
+
+// A panic partway through the transaction must roll back exactly as
+// cleanly as a returned error does. This is not testing app-order's own
+// code so much as the primitive Create is built on: gorm's db.Transaction
+// recovers a panic, rolls back, and re-panics, which is what makes it safe
+// to use in place of go-admin's hand-rolled Begin/defer pattern (see
+// Create's doc comment) - a pattern that, on a panic, commits whatever the
+// transaction had written so far instead of undoing it.
+func TestCreate_PanicInsideTransactionRollsBackEverything(t *testing.T) {
+	db := testDB(t)
+
+	func() {
+		defer func() {
+			if recover() == nil {
+				t.Fatal("db.Transaction did not propagate the panic")
+			}
+		}()
+		_ = db.Transaction(func(tx *gorm.DB) error {
+			if err := tx.Create(&models.Order{OrderNo: "panic-test", Status: models.StatusPending}).Error; err != nil {
+				t.Fatalf("Create inside transaction: %v", err)
+			}
+			panic("simulated failure after a partial write")
+		})
+	}()
+
+	var count int64
+	db.Model(&models.Order{}).Count(&count)
+	if count != 0 {
+		t.Errorf("the order row survived a panic mid-transaction: %d rows in app_order", count)
+	}
+}
+
+// -- status transition / concurrency guard ----------------------------------
+
+func createPendingOrder(t *testing.T, s *Order, userId int) *models.Order {
+	t.Helper()
+	order, err := s.Create(&orderdto.OrderCreateReq{Items: []orderdto.OrderItemReq{
+		{ProductName: "widget", Quantity: 1, PriceCents: 100},
+	}}, userId)
+	if err != nil {
+		t.Fatalf("Create: %v", err)
+	}
+	return order
+}
+
+func TestPay_TransitionsPendingToPaid(t *testing.T) {
+	db := testDB(t)
+	s := newOrderService(t, db)
+	order := createPendingOrder(t, s, 1)
+
+	if err := s.Pay(order.Id, &actions.DataPermission{DataScope: actions.DataScopeAll}); err != nil {
+		t.Fatalf("Pay: %v", err)
+	}
+
+	var got models.Order
+	db.First(&got, order.Id)
+	if got.Status != models.StatusPaid {
+		t.Errorf("Status = %q, want paid", got.Status)
+	}
+}
+
+func TestPay_AlreadyPaidReturnsErrOrderNotPending(t *testing.T) {
+	db := testDB(t)
+	s := newOrderService(t, db)
+	order := createPendingOrder(t, s, 1)
+	all := &actions.DataPermission{DataScope: actions.DataScopeAll}
+
+	if err := s.Pay(order.Id, all); err != nil {
+		t.Fatalf("first Pay: %v", err)
+	}
+	if err := s.Pay(order.Id, all); !errors.Is(err, ErrOrderNotPending) {
+		t.Fatalf("second Pay returned %v, want ErrOrderNotPending", err)
+	}
+}
+
+// Two concurrent payment attempts against the same pending order: exactly
+// one must succeed. MaxOpenConns(1) is set on the underlying *sql.DB so the
+// two goroutines' UPDATEs serialize the way two independent connections
+// would under MySQL, rather than one of them failing outright with
+// SQLITE_BUSY - sqlite is a single-writer database with no useful
+// concurrency of its own to exercise here. What the test actually verifies
+// is unaffected by that: the guard is the UPDATE ... WHERE status =
+// 'pending' clause and the RowsAffected check on its result (Pay's doc
+// comment), and that logic runs once per goroutine regardless of how the
+// pool schedules the two connections.
+func TestPay_ConcurrentPaymentsOnlyOneSucceeds(t *testing.T) {
+	db := testDB(t)
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatalf("DB(): %v", err)
+	}
+	sqlDB.SetMaxOpenConns(1)
+
+	s := newOrderService(t, db)
+	order := createPendingOrder(t, s, 1)
+	all := &actions.DataPermission{DataScope: actions.DataScopeAll}
+
+	var wg sync.WaitGroup
+	errs := make([]error, 2)
+	for i := 0; i < 2; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			errs[i] = s.Pay(order.Id, all)
+		}(i)
+	}
+	wg.Wait()
+
+	successes, failures := 0, 0
+	for _, err := range errs {
+		switch {
+		case err == nil:
+			successes++
+		case errors.Is(err, ErrOrderNotPending):
+			failures++
+		default:
+			t.Fatalf("unexpected error from a concurrent Pay: %v", err)
+		}
+	}
+	if successes != 1 || failures != 1 {
+		t.Fatalf("got %d successes and %d failures, want exactly 1 and 1", successes, failures)
+	}
+}
+
+// -- data permission ---------------------------------------------------------
+
+func TestGetPage_SelfScopeOnlySeesOwnOrders(t *testing.T) {
+	enableDataPermission(t)
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	createPendingOrder(t, s, 1) // belongs to user 1
+	createPendingOrder(t, s, 2) // belongs to user 2
+
+	var list []models.Order
+	count, err := s.GetPage(&orderdto.OrderSearchReq{}, &actions.DataPermission{
+		DataScope: actions.DataScopeSelf,
+		UserId:    1,
+	}, &list)
+	if err != nil {
+		t.Fatalf("GetPage: %v", err)
+	}
+	if count != 1 || len(list) != 1 {
+		t.Fatalf("got %d orders, want exactly the 1 belonging to user 1", count)
+	}
+	if list[0].UserId != 1 {
+		t.Errorf("returned order belongs to user %d, not the caller", list[0].UserId)
+	}
+}
+
+func TestGetPage_AllScopeSeesEveryOrder(t *testing.T) {
+	enableDataPermission(t)
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	createPendingOrder(t, s, 1)
+	createPendingOrder(t, s, 2)
+
+	var list []models.Order
+	count, err := s.GetPage(&orderdto.OrderSearchReq{}, &actions.DataPermission{DataScope: actions.DataScopeAll}, &list)
+	if err != nil {
+		t.Fatalf("GetPage: %v", err)
+	}
+	if count != 2 {
+		t.Fatalf("got %d orders, want 2", count)
+	}
+}
+
+// An invalid/unrecognized data_scope must fail closed - match nothing -
+// never fall back to "see everything". This is core's own documented
+// contract (contract/actions.Permission's default case), exercised here
+// against app-order's own table to confirm the fail-closed behaviour
+// actually reaches a hand-written Service's query, not just core's own
+// unit tests.
+func TestGetPage_InvalidScopeSeesNothing(t *testing.T) {
+	enableDataPermission(t)
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	createPendingOrder(t, s, 1)
+	createPendingOrder(t, s, 2)
+
+	var list []models.Order
+	count, err := s.GetPage(&orderdto.OrderSearchReq{}, &actions.DataPermission{DataScope: "not-a-real-scope"}, &list)
+	if err != nil {
+		t.Fatalf("GetPage: %v", err)
+	}
+	if count != 0 || len(list) != 0 {
+		t.Fatalf("an invalid data scope returned %d orders, want 0 (fail closed)", count)
+	}
+}
+
+func TestGet_ReturnsOrderWithItemsPreloaded(t *testing.T) {
+	enableDataPermission(t)
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	created := createPendingOrder(t, s, 1)
+
+	var got models.Order
+	err := s.Get(created.Id, &actions.DataPermission{DataScope: actions.DataScopeSelf, UserId: 1}, &got)
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+	if len(got.Items) != 1 {
+		t.Fatalf("got %d items, want the 1 created with the order", len(got.Items))
+	}
+	if got.Items[0].ProductName != "widget" {
+		t.Errorf("item ProductName = %q, want widget", got.Items[0].ProductName)
+	}
+}
+
+func TestGet_ScopedOutOrderReportsNotFoundNotForbidden(t *testing.T) {
+	enableDataPermission(t)
+	db := testDB(t)
+	s := newOrderService(t, db)
+
+	other := createPendingOrder(t, s, 2)
+
+	var got models.Order
+	err := s.Get(other.Id, &actions.DataPermission{DataScope: actions.DataScopeSelf, UserId: 1}, &got)
+	if !errors.Is(err, gorm.ErrRecordNotFound) {
+		t.Fatalf("Get on another user's order returned %v, want gorm.ErrRecordNotFound", err)
+	}
+}

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/casbin/casbin/v3 v3.8.1
 	github.com/gin-gonic/gin v1.12.0
 	github.com/glebarez/sqlite v1.11.0
-	github.com/go-admin-team/go-admin-core/v2 v2.5.0
+	github.com/go-admin-team/go-admin-core/v2 v2.7.0
 	github.com/google/uuid v1.6.0
 	github.com/huaweicloud/huaweicloud-sdk-go-obs v3.26.6+incompatible
 	github.com/mssola/user_agent v0.6.0
@@ -26,6 +26,7 @@ require (
 	github.com/swaggo/gin-swagger v1.6.1
 	github.com/swaggo/swag v1.16.6
 	github.com/unrolled/secure v1.17.0
+	go.yaml.in/yaml/v3 v3.0.5
 	golang.org/x/crypto v0.54.0
 	gorm.io/driver/mysql v1.6.0
 	gorm.io/driver/postgres v1.6.2
@@ -126,7 +127,6 @@ require (
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.1 // indirect
-	go.yaml.in/yaml/v3 v3.0.5 // indirect
 	golang.org/x/arch v0.30.0 // indirect
 	golang.org/x/exp v0.0.0-20251219203646-944ab1f22d93 // indirect
 	golang.org/x/image v0.41.0 // indirect

go.sum

@@ -145,8 +145,8 @@ github.com/glebarez/go-sqlite v1.22.0 h1:uAcMJhaA6r3LHMTFgP0SifzgXg46yJkgxqyuyec
 github.com/glebarez/go-sqlite v1.22.0/go.mod h1:PlBIdHe0+aUEFn+r2/uthrWq4FxbzugL0L8Li6yQJbc=
 github.com/glebarez/sqlite v1.11.0 h1:wSG0irqzP6VurnMEpFGer5Li19RpIRi2qvQz++w0GMw=
 github.com/glebarez/sqlite v1.11.0/go.mod h1:h8/o8j5wiAsqSPoWELDUdJXhjAhsVliSn7bWZjOhrgQ=
-github.com/go-admin-team/go-admin-core/v2 v2.5.0 h1:aD1SALklBxizGB9u8cOgm4OT8z656FM83F4fD6dMz9g=
-github.com/go-admin-team/go-admin-core/v2 v2.5.0/go.mod h1:LG/XvEfOplbuadKrPTPm0Nu5pN06aQUNZZC3ao4B4gs=
+github.com/go-admin-team/go-admin-core/v2 v2.7.0 h1:1qV0/5iFBvkE3BRtm4ip0v0QYG9Fgx4UtOTd8zkQT9c=
+github.com/go-admin-team/go-admin-core/v2 v2.7.0/go.mod h1:LG/XvEfOplbuadKrPTPm0Nu5pN06aQUNZZC3ao4B4gs=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.10.0/go.mod h1:xUsJbQ/Fp4kEt7AFgCuvyX4a71u8h9jB8tj/ORgOZ7o=

scripts/k8s/deploy.yml

@@ -22,6 +22,11 @@ metadata:
     app: go-admin
     version: v1
 spec:
+  # One replica, and the drain window below buys nothing at one replica: there
+  # is nowhere to send the traffic this pod stops taking. Raising it needs one
+  # more change than the number - the volume below is shared by every replica,
+  # and the log path in settings.yml lives on it, so a second pod would append
+  # to the same rotating file.
   replicas: 1
   selector:
     matchLabels:
@@ -39,6 +44,40 @@ spec:
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 8000
+        # Readiness answers "send me requests". It fails while the database or
+        # the cache is unreachable, so this pod stays out of the Service until
+        # the datastore settings.yml names is really there - which is a change
+        # from having no probe at all, where a pod with an unreachable database
+        # was still sent traffic.
+        #
+        # timeoutSeconds is 3 rather than the default 1 because the handler
+        # allows its checks 2 seconds (readyTimeout in
+        # app/other/router/monitor.go). At the default, a database that answers
+        # in 1.2s is recorded as a failed check while the handler is returning
+        # 200.
+        readinessProbe:
+          httpGet:
+            path: /api/v1/ready
+            port: 8000
+          periodSeconds: 5
+          timeoutSeconds: 3
+          failureThreshold: 3
+        # Liveness answers "restart me", which is a different question: a
+        # process whose database is unreachable does not want restarting, so
+        # this points at /health, which is a bare 200. Both probes skip the
+        # rate limiter - see exemptProbes in cmd/api/server.go - because a
+        # liveness probe that collects 429s under load gets the container
+        # restarted at the moment the deployment can least afford to lose it.
+        #
+        # initialDelaySeconds covers the migrations, which run before the
+        # listener opens.
+        livenessProbe:
+          httpGet:
+            path: /api/v1/health
+            port: 8000
+          initialDelaySeconds: 15
+          periodSeconds: 10
+          failureThreshold: 3
         volumeMounts:
         - name: go-admin
           mountPath: /temp
@@ -47,6 +86,18 @@ spec:
         - name: go-admin-config
           mountPath: /config/
           readOnly: true
+      # SIGKILL arrives when this is up, so it has to be longer than what the
+      # process spends shutting down: extend.shutdown's drain + server +
+      # cleanup, which settings.yml ships as 0 + 5 + 3. Raise drain here and
+      # this number has to follow, or the cleanup callbacks are cut off
+      # part-way through - checksilent's shutdown-budget-overruns-grace check
+      # is what notices.
+      #
+      # No preStop hook on purpose. A sleep there would be spent before the
+      # process is told anything, so BeginDraining never runs and /ready
+      # answers 200 for the whole of it - and it would be added to the budget
+      # above rather than replacing any of it.
+      terminationGracePeriodSeconds: 30
       volumes:
       - name: go-admin
         persistentVolumeClaim:

tools/checksilent/checks.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"go/ast"
 	"go/token"
 	"path"
 	"sort"
@@ -18,6 +19,10 @@ const (
 	checkConfigValue    = "config-value-truncation"
 	checkMenuIDConflict = "menu-id-collision"
 	checkImportBoundary = "contract-import-boundary"
+	checkShimAlias      = "contract-shim-alias"
+	checkDataScopeRoute = "datascope-route-unguarded"
+	checkShutdownGrace  = "shutdown-budget-overruns-grace"
+	checkDockerStop     = "docker-stop-cuts-shutdown-short"
 )
 
 // Package paths, relative to the module. Spelled once so a module rename
@@ -44,6 +49,19 @@ func runChecks(s *snapshot, opt options) ([]Finding, error) {
 	out = append(out, checkConfigValueLength(s)...)
 	out = append(out, checkMenuIDCollisions(s)...)
 	out = append(out, checkContractImportBoundary(s)...)
+	out = append(out, checkContractShimAlias(s)...)
+	out = append(out, checkDataScopeRoutes(s)...)
+
+	for _, run := range []func(*snapshot) ([]Finding, error){
+		checkShutdownBudgetFitsGrace,
+		checkDockerStopGrace,
+	} {
+		fs, err := run(s)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, fs...)
+	}
 
 	if opt.UIDir != "" {
 		fs, err := checkMenuNames(s, opt.UIDir)
@@ -109,6 +127,9 @@ func checkModelTimeMixing(s *snapshot) []Finding {
 	frozen := s.pkg(pkgFrozenModels)
 
 	for _, sf := range s.Files {
+		if sf.isTest() {
+			continue
+		}
 		if strings.HasPrefix(sf.Path, "app/") && sf.Imports(frozen) {
 			tables := tableNames(sf)
 			for name, st := range structTypes(sf) {
@@ -166,6 +187,9 @@ func checkMenuSortOverflow(s *snapshot) []Finding {
 	)
 	var out []Finding
 	for _, sf := range s.Files {
+		if sf.isTest() {
+			continue
+		}
 		forEachStructLiteral(sf, func(lit structLiteral) {
 			if !s.isMenuModel(lit) {
 				return
@@ -204,6 +228,9 @@ func checkConfigValueLength(s *snapshot) []Finding {
 	const limit = 255
 	var out []Finding
 	for _, sf := range s.Files {
+		if sf.isTest() {
+			continue
+		}
 		forEachStructLiteral(sf, func(lit structLiteral) {
 			if lit.Name != "SysConfig" || !s.isModelPackage(lit.PkgPath) {
 				return
@@ -251,6 +278,9 @@ func checkMenuIDCollisions(s *snapshot) []Finding {
 	sites := map[int64][]site{}
 
 	for _, sf := range s.Files {
+		if sf.isTest() {
+			continue
+		}
 		forEachStructLiteral(sf, func(lit structLiteral) {
 			if !s.isMenuModel(lit) {
 				return
@@ -379,6 +409,135 @@ func checkContractImportBoundary(s *snapshot) []Finding {
 	return out
 }
 
+// ---------------------------------------------------------------------------
+// check 7: a shim of a core contract type must be an alias
+// ---------------------------------------------------------------------------
+
+// coreModulePrefix and coreContractSegment together identify a package under
+// core's contract namespace. Matched as prefix plus segment rather than as one
+// literal path so that a major-version bump of core - which rewrites the
+// /v2 in every import - does not quietly turn this check off.
+const (
+	coreModulePrefix    = "github.com/go-admin-team/go-admin-core/"
+	coreContractSegment = "/sdk/contract/"
+)
+
+// isCoreContractPkg reports whether an import path names one of core's
+// contract packages.
+func isCoreContractPkg(path string) bool {
+	return strings.HasPrefix(path, coreModulePrefix) && strings.Contains(path, coreContractSegment)
+}
+
+// checkContractShimAlias reports a shim of a core contract type that was
+// written as a defined type instead of an alias.
+//
+//	type ControlBy = models.ControlBy   // alias: same type, same method set
+//	type ControlBy models.ControlBy     // defined type: methods are gone
+//
+// The two lines differ by one character and by everything else. A defined type
+// takes the underlying struct and none of the methods declared on it, so a
+// model embedding the second one no longer has SetCreateBy or SetUpdateBy and
+// no longer satisfies ActiveRecord - which is not a warning, it is a compile
+// error, but only in code that actually uses the method set.
+//
+// That is why the compiler is not enough on its own. This repository exercises
+// some of the contract types through interfaces and some not at all; the ones
+// it does not exercise compile perfectly well as defined types here and break
+// in a third-party application, or in a fork's own module, which is where
+// nobody is looking. The check costs one field of the AST - a type alias
+// records the position of its '=' - and covers the surface uniformly rather
+// than covering whatever app/demo happens to touch this month.
+//
+// The trigger is the right-hand side, not a list of names: any type declared
+// from a core contract package is one of these, whoever wrote it and whenever
+// it was added. A type declared from a local struct literal is not caught by
+// this - see ScannedShimAliases, which is what stops a run over a tree with no
+// shims in it from reading as a clean bill of health.
+func checkContractShimAlias(s *snapshot) []Finding {
+	var out []Finding
+	for _, sf := range s.Files {
+		forEachTypeSpec(sf, func(ts *ast.TypeSpec) {
+			qualifier, pkg, name, ok := qualifiedType(sf, ts.Type)
+			if !ok || !isCoreContractPkg(pkg) {
+				return
+			}
+			if ts.Assign.IsValid() {
+				return // "type X = pkg.Y", which is what it must be
+			}
+			out = append(out, s.finding(Error, checkShimAlias, sf, ts,
+				"%s is declared from %s.%s as a defined type, not an alias;\n"+
+					"    a defined type keeps the fields and drops the method set, so anything embedding it stops satisfying\n"+
+					"    the interfaces it satisfied before - here it may still compile, in a fork or a third-party app it does not.\n"+
+					"    Write it as: type %s = %s.%s",
+				ts.Name.Name, qualifier, name, ts.Name.Name, qualifier, name))
+		})
+	}
+	return out
+}
+
+// ScannedShimAliases counts the type aliases into core's contract packages the
+// snapshot holds, so the summary can say whether checkContractShimAlias found
+// anything to guard at all.
+//
+// Reported for the same reason ScannedContractRoots is: before the contract
+// packages are lowered into core there are no shims here, the check has
+// nothing to look at, and a run that printed nothing would look exactly like a
+// run over a tree that passed.
+func ScannedShimAliases(s *snapshot) int {
+	n := 0
+	for _, sf := range s.Files {
+		forEachTypeSpec(sf, func(ts *ast.TypeSpec) {
+			_, pkg, _, ok := qualifiedType(sf, ts.Type)
+			if ok && isCoreContractPkg(pkg) && ts.Assign.IsValid() {
+				n++
+			}
+		})
+	}
+	return n
+}
+
+// forEachTypeSpec visits every type declaration in the file, including the
+// ones inside a parenthesised type block.
+func forEachTypeSpec(sf *sourceFile, fn func(*ast.TypeSpec)) {
+	for _, decl := range sf.Syntax.Decls {
+		gen, ok := decl.(*ast.GenDecl)
+		if !ok || gen.Tok != token.TYPE {
+			continue
+		}
+		for _, spec := range gen.Specs {
+			if ts, ok := spec.(*ast.TypeSpec); ok {
+				fn(ts)
+			}
+		}
+	}
+}
+
+// qualifiedType resolves a type expression that names a type in another
+// package, returning that package's import path and the type name. A bare
+// identifier, a struct literal or anything else reports false: this asks
+// specifically "is the right-hand side pkg.Name", which is the shape both a
+// correct shim and the mistake it guards against are written in.
+// The qualifier returned is the one written in this file, which is not
+// path.Base of the import path whenever the import is aliased - and the shim
+// files alias every one of them (contractmodels, contractdto). A message that
+// suggests a fix has to spell it the way the file already does, or the line it
+// tells the author to write does not compile.
+func qualifiedType(sf *sourceFile, typ ast.Expr) (qualifier, pkgPath, name string, ok bool) {
+	sel, isSel := typ.(*ast.SelectorExpr)
+	if !isSel {
+		return "", "", "", false
+	}
+	ident, isIdent := sel.X.(*ast.Ident)
+	if !isIdent {
+		return "", "", "", false
+	}
+	p, found := sf.imports[ident.Name]
+	if !found {
+		return "", "", "", false
+	}
+	return ident.Name, p, sel.Sel.Name, true
+}
+
 // migrationVersion reads the 13-digit timestamp a migration file name starts
 // with. Files outside the two migration directories are not migrations, however
 // they are named.
@@ -398,9 +557,23 @@ func migrationVersion(rel string) (int64, bool) {
 	return v, true
 }
 
-// isMenuModel reports whether a literal is one of the SysMenu models rather
-// than, say, the SysMenu service struct that shares the name.
+// isMenuModel reports whether a literal describes a menu row, whichever of
+// the two shapes it is written in.
+//
+// A host module seeds a menu by building the SysMenu model directly. An
+// application installed from outside this repository cannot reach that type,
+// so it describes the same row as a seed.MenuSpec and hands it to the host's
+// Seeder. Both end up in sys_menu and both are subject to its column widths,
+// so a check that knew only the first shape would go quiet exactly when the
+// author is furthest from the schema it protects.
+//
+// That is not hypothetical: this repository's own reference application was
+// written with a Sort of 200 - past the tinyint sys_menu.sort is built as -
+// and this check passed it, because a MenuSpec is not a SysMenu.
 func (s *snapshot) isMenuModel(lit structLiteral) bool {
+	if lit.Name == "MenuSpec" && isCoreContractPkg(lit.PkgPath) {
+		return true
+	}
 	return lit.Name == "SysMenu" && s.isModelPackage(lit.PkgPath)
 }
 

tools/checksilent/checks_test.go

@@ -452,3 +452,219 @@ func TestComponentNameParsesBothVueStyles(t *testing.T) {
 		t.Error("a component with no declared name must not be compared")
 	}
 }
+
+// ---------------------------------------------------------------------------
+
+const coreContractModels = "github.com/go-admin-team/go-admin-core/v2/sdk/contract/models"
+
+// shimFixture writes one shim file declaring ControlBy from core's contract
+// package, in whichever of the two forms the caller asks for.
+func shimFixture(t *testing.T, decl string) string {
+	t.Helper()
+	return fixture(t, map[string]string{
+		"common/models/by.go": "package models\n\nimport \"" + coreContractModels + "\"\n\n" + decl + "\n",
+	})
+}
+
+func TestShimAliasDetectsADefinedType(t *testing.T) {
+	root := shimFixture(t, "type ControlBy models.ControlBy")
+
+	f := requireOne(t, check(t, root, options{}), checkShimAlias)
+	if f.Severity != "ERROR" {
+		t.Errorf("severity = %s", f.Severity)
+	}
+	if !strings.Contains(f.Message, "type ControlBy = models.ControlBy") {
+		t.Errorf("the message must spell out the fix; got %s", f.Message)
+	}
+	if f.File != "common/models/by.go" || f.Line != 5 {
+		t.Errorf("position = %s:%d", f.File, f.Line)
+	}
+}
+
+// The counterproof for the check above: the same fixture with the one
+// character that makes it correct must produce nothing. Without this the check
+// could be reporting every type declaration it sees and the test above would
+// still pass.
+func TestShimAliasAcceptsAnAlias(t *testing.T) {
+	root := shimFixture(t, "type ControlBy = models.ControlBy")
+	if got := only(t, check(t, root, options{}), checkShimAlias); len(got) != 0 {
+		t.Errorf("reported %v", got)
+	}
+}
+
+// A parenthesised type block is how a shim package with more than one type
+// tends to get written, and a walker that only looked at single-spec
+// declarations would skip all but the first.
+func TestShimAliasReadsAParenthesisedBlock(t *testing.T) {
+	root := shimFixture(t, `type (
+	Model     = models.Model
+	ControlBy models.ControlBy
+	ModelTime = models.ModelTime
+)`)
+	f := requireOne(t, check(t, root, options{}), checkShimAlias)
+	if !strings.Contains(f.Message, "ControlBy") {
+		t.Errorf("message = %s", f.Message)
+	}
+}
+
+// A defined type over a package that is not core's contract namespace is
+// somebody's ordinary code. The check exists for the surface core promises to
+// keep stable, and reporting anything else would make it a style rule.
+func TestShimAliasIgnoresOtherPackages(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/demo/models/product.go": `package models
+
+import "go-admin/common/models"
+
+type Product models.Model
+`,
+	})
+	if got := only(t, check(t, root, options{}), checkShimAlias); len(got) != 0 {
+		t.Errorf("reported %v", got)
+	}
+}
+
+// The version is part of core's import path and changes on every major bump.
+// Matching the whole path literally would turn the check off on that day and
+// say nothing about it.
+func TestShimAliasSurvivesACoreMajorVersionBump(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"common/models/by.go": `package models
+
+import "github.com/go-admin-team/go-admin-core/v9/sdk/contract/models"
+
+type ControlBy models.ControlBy
+`,
+	})
+	if got := only(t, check(t, root, options{}), checkShimAlias); len(got) != 1 {
+		t.Errorf("findings = %v", got)
+	}
+}
+
+// A tree with no shims in it is the state of this repository until the
+// contract packages are lowered, and the check saying nothing there must not
+// be reported as a boundary being guarded.
+func TestShimAliasCoverageIsReportedAsZeroWhenThereAreNoShims(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"common/models/by.go": "package models\n\ntype ControlBy struct{}\n",
+	})
+	s, err := load(root)
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if n := ScannedShimAliases(s); n != 0 {
+		t.Errorf("ScannedShimAliases = %d, want 0", n)
+	}
+
+	var buf strings.Builder
+	if _, err := run(&buf, root, options{}, false); err != nil {
+		t.Fatalf("run: %v", err)
+	}
+	if !strings.Contains(buf.String(), "guarded nothing") {
+		t.Errorf("the summary must say the check covered nothing; got:\n%s", buf.String())
+	}
+}
+
+func TestShimAliasCoverageCountsTheAliasesItGuards(t *testing.T) {
+	root := shimFixture(t, `type (
+	Model     = models.Model
+	ControlBy = models.ControlBy
+)`)
+	s, err := load(root)
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if n := ScannedShimAliases(s); n != 2 {
+		t.Errorf("ScannedShimAliases = %d, want 2", n)
+	}
+}
+
+// A menu written as a seed.MenuSpec lands in the same sys_menu.sort column as
+// one written as a SysMenu, so the same tinyint bound applies. Until this was
+// covered, an application - the one author furthest from the schema - was the
+// one the check went quiet for.
+func TestMenuSortOverflowIsDetectedInAContractMenuSpec(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"example/app-order/migration/migration.go": `package migration
+
+import "github.com/go-admin-team/go-admin-core/v2/sdk/contract/seed"
+
+func menus() []seed.MenuSpec {
+	return []seed.MenuSpec{
+		{Code: "dir", Sort: 200},
+		{Code: "ok", Sort: 20},
+	}
+}
+`,
+	})
+
+	f := requireOne(t, check(t, root, options{}), checkMenuSort)
+	if !strings.Contains(f.Message, "200") {
+		t.Errorf("finding should name the offending value, got: %s", f.Message)
+	}
+}
+
+// Every guard against a bad seeded value needs a test that writes the very
+// value it rejects. Scanning _test.go made each of those guards report its
+// own test - the check firing on the proof that it works.
+func TestSeededValueChecksSkipTestFiles(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"cmd/migrate/migration/models/models.go": frozenModelsPkg,
+		"app/admin/service/seed_test.go": `package service
+
+import "go-admin/cmd/migrate/migration/models"
+
+func fixtureMenus() []models.SysMenu {
+	return []models.SysMenu{
+		{MenuId: 9000, Sort: 900},
+	}
+}
+`,
+	})
+
+	if got := only(t, check(t, root, options{}), checkMenuSort); len(got) != 0 {
+		t.Fatalf("%s fired on a test fixture: %v", checkMenuSort, got)
+	}
+}
+
+// The other direction: the exemption must not turn the check off. A real
+// seed - the thing that actually reaches MySQL - is still reported.
+func TestSeededValueChecksStillCoverNonTestFiles(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"cmd/migrate/migration/models/models.go": frozenModelsPkg,
+		"cmd/migrate/migration/version/1786700001000_seed.go": `package version
+
+import "go-admin/cmd/migrate/migration/models"
+
+func seed() []models.SysMenu {
+	return []models.SysMenu{
+		{MenuId: 9000, Sort: 900},
+	}
+}
+`,
+	})
+
+	f := requireOne(t, check(t, root, options{}), checkMenuSort)
+	if !strings.Contains(f.Message, "900") {
+		t.Errorf("finding = %+v", f)
+	}
+}
+
+// The suggested fix has to use the qualifier the file actually writes. Every
+// shim in this repository aliases its import (contractmodels, contractdto),
+// so building the message from path.Base of the import path told the author
+// to write a line that does not compile.
+func TestShimAliasSuggestionUsesTheInSourceQualifier(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"common/models/by.go": "package models\n\nimport contractmodels \"" + coreContractModels +
+			"\"\n\ntype ControlBy contractmodels.ControlBy\n",
+	})
+
+	f := requireOne(t, check(t, root, options{}), checkShimAlias)
+	if !strings.Contains(f.Message, "type ControlBy = contractmodels.ControlBy") {
+		t.Errorf("the fix must name the import as this file spells it; got %s", f.Message)
+	}
+	if strings.Contains(f.Message, "= models.ControlBy") {
+		t.Errorf("the fix names a qualifier this file does not bind; got %s", f.Message)
+	}
+}

tools/checksilent/datascope.go

@@ -0,0 +1,390 @@
+package main
+
+import (
+	"go/ast"
+	"strings"
+)
+
+// ---------------------------------------------------------------------------
+// check 8: a handler that reads the data permission, on a route that never
+// installs the middleware which puts one there
+// ---------------------------------------------------------------------------
+
+// permissionGetter is the function a handler calls to obtain the caller's data
+// scope, and permissionMiddleware is the middleware that puts one in the
+// context. Matched by name rather than by resolved symbol: the tool parses
+// without type checking, and both names are distinctive enough that a
+// same-named function from somewhere else would still be worth a look.
+const (
+	permissionGetter     = "GetPermissionFromContext"
+	permissionMiddleware = "PermissionAction"
+)
+
+// actionsPkgSuffix identifies the package the two names above live in - this
+// repository's common/actions shim and core's sdk/contract/actions both end
+// this way, and a module rename changes neither.
+const actionsPkgSuffix = "/actions"
+
+// handlerKey identifies one handler method uniquely across packages, so that
+// two types named SysUser in different packages are not confused.
+type handlerKey struct {
+	Pkg  string
+	Type string
+	Func string
+}
+
+// checkDataScopeRoutes reports a route whose handler asks for the caller's data
+// permission while the group it is registered on never installs the middleware
+// that supplies one.
+//
+// GetPermissionFromContext cannot fail. When nothing put a *DataPermission in
+// the context it hands back a zero value, whose DataScope is the empty string -
+// and the empty string is not one of the five scopes Permission recognises, so
+// it takes the default branch. That branch fails closed: the query is given
+// `1 = 0` and matches nothing.
+//
+// The result is an endpoint that answers "not found" or "no permission" for
+// rows that plainly exist, and only on deployments that set enabledp: true -
+// with data permissions off, Permission returns the query untouched and the
+// missing middleware costs nothing. That is the shape this check exists for: a
+// default configuration where the mistake is invisible, and a test suite that
+// runs on it.
+//
+// It happened. /api/v1/getinfo read the permission on a group carrying only the
+// JWT middleware, so every login on a deployment with data permissions enabled
+// ended in a 401 from the endpoint the browser calls immediately after signing
+// in - and went back to the login page.
+//
+// Either half is a fix, and which one depends on the route. A handler that
+// reads somebody else's rows wants the middleware. A handler reading the
+// caller's own row - where the id comes from the token - wants no scope at all,
+// because a scope has nothing left to restrict there and DataScopeSelf, which
+// matches on create_by, would reject every user who did not create their own
+// account. The check reports the mismatch and leaves the choice.
+func checkDataScopeRoutes(s *snapshot) []Finding {
+	handlers := permissionReadingHandlers(s)
+	if len(handlers) == 0 {
+		return nil
+	}
+
+	var out []Finding
+	for _, sf := range s.Files {
+		if sf.isTest() {
+			continue
+		}
+		for _, decl := range sf.Syntax.Decls {
+			fn, ok := decl.(*ast.FuncDecl)
+			if !ok || fn.Body == nil {
+				continue
+			}
+			out = append(out, s.routeFindings(sf, fn, handlers)...)
+		}
+	}
+	return out
+}
+
+// permissionReadingHandlers collects every method whose body calls the getter.
+//
+// Test files are included deliberately: a handler is a handler wherever it is
+// declared, and skipping them would let a route registered from a test fixture
+// go unchecked while the fixture is exactly where a new one gets written first.
+func permissionReadingHandlers(s *snapshot) map[handlerKey]bool {
+	out := map[handlerKey]bool{}
+	for _, sf := range s.Files {
+		for _, decl := range sf.Syntax.Decls {
+			fn, ok := decl.(*ast.FuncDecl)
+			if !ok || fn.Body == nil || fn.Recv == nil || len(fn.Recv.List) == 0 {
+				continue
+			}
+			recv := receiverTypeName(fn.Recv.List[0].Type)
+			if recv == "" {
+				continue
+			}
+			if callsPackageFunc(sf, fn.Body, permissionGetter) {
+				out[handlerKey{Pkg: sf.Pkg, Type: recv, Func: fn.Name.Name}] = true
+			}
+		}
+	}
+	return out
+}
+
+// routeFindings walks one function looking for group definitions and the routes
+// registered on them.
+func (s *snapshot) routeFindings(sf *sourceFile, fn *ast.FuncDecl, handlers map[handlerKey]bool) []Finding {
+	// Local variable bindings for the whole function. The first pass below
+	// fills these and the second reads them, so a registration sees every
+	// binding in the function rather than only the ones written above it -
+	// deliberately, because a `.Use` can be written below a route and still be
+	// part of the chain. The cost is that a name reused for two different
+	// things in one function resolves to whichever assignment came last.
+	apiVars := map[string]handlerKey{} // var -> the type it holds
+	guarded := map[string]bool{}       // group var -> middleware installed
+	known := map[string]bool{}         // group var -> is a router group at all
+	prefix := map[string]string{}      // group var -> the path it was declared with
+
+	var out []Finding
+	ast.Inspect(fn.Body, func(n ast.Node) bool {
+		switch stmt := n.(type) {
+		case *ast.AssignStmt:
+			for i, lhs := range stmt.Lhs {
+				id, ok := lhs.(*ast.Ident)
+				if !ok || i >= len(stmt.Rhs) {
+					continue
+				}
+				rhs := stmt.Rhs[i]
+				if key, ok := apiTypeOf(sf, rhs); ok {
+					apiVars[id.Name] = key
+					continue
+				}
+				if parent, isGroup := groupSource(rhs); isGroup {
+					known[id.Name] = true
+					prefix[id.Name] = prefix[parent] + groupPath(rhs)
+					// A subgroup inherits whatever its parent already had:
+					// gin copies the parent's handler chain into the child.
+					guarded[id.Name] = guarded[parent] || containsCallNamed(rhs, permissionMiddleware)
+				}
+			}
+		case *ast.ExprStmt:
+			// A separate `g.Use(...)` after the group was defined.
+			call, ok := stmt.X.(*ast.CallExpr)
+			if !ok {
+				return true
+			}
+			if target, ok := receiverIdentOf(call, "Use"); ok && known[target] {
+				if containsCallNamed(call, permissionMiddleware) {
+					guarded[target] = true
+				}
+			}
+		}
+		return true
+	})
+
+	// Second pass for the registrations, so that a `.Use` written below a route
+	// still counts - the middleware chain is assembled before any request is
+	// served, not in source order.
+	ast.Inspect(fn.Body, func(n ast.Node) bool {
+		call, ok := n.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		gvar, method, ok := routeRegistration(call)
+		if !ok || !known[gvar] || guarded[gvar] {
+			return true
+		}
+		route, handlerVar, handlerName, ok := routeArgs(call)
+		if !ok {
+			return true
+		}
+		key, ok := apiVars[handlerVar]
+		if !ok {
+			return true
+		}
+		key.Func = handlerName
+		if !handlers[key] {
+			return true
+		}
+		out = append(out, s.finding(Error, checkDataScopeRoute, sf, call,
+			"%s %q is handled by %s.%s, which reads the caller's data permission,\n"+
+				"    but the group it is registered on never installs %s.\n"+
+				"    GetPermissionFromContext then returns the zero value, whose empty DataScope is not a\n"+
+				"    recognised scope, so Permission fails closed and the query matches nothing - on any\n"+
+				"    deployment with enabledp: true. With data permissions off the route works, which is\n"+
+				"    why this does not show up in the default configuration or in CI.\n"+
+				"    Add %s() to the group, or stop scoping a query that is already limited to the caller.",
+			method, prefix[gvar]+route, key.Type, handlerName, permissionMiddleware, permissionMiddleware))
+		return true
+	})
+	return out
+}
+
+// receiverTypeName returns the bare type name of a method receiver, for both
+// `(e SysUser)` and `(e *SysUser)`.
+func receiverTypeName(expr ast.Expr) string {
+	if star, ok := expr.(*ast.StarExpr); ok {
+		expr = star.X
+	}
+	if id, ok := expr.(*ast.Ident); ok {
+		return id.Name
+	}
+	return ""
+}
+
+// callsPackageFunc reports whether body calls name on a package whose import
+// path ends in actionsPkgSuffix.
+func callsPackageFunc(sf *sourceFile, body ast.Node, name string) bool {
+	found := false
+	ast.Inspect(body, func(n ast.Node) bool {
+		if found {
+			return false
+		}
+		call, ok := n.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		sel, ok := call.Fun.(*ast.SelectorExpr)
+		if !ok || sel.Sel.Name != name {
+			return true
+		}
+		pkg, ok := sel.X.(*ast.Ident)
+		if !ok {
+			return true
+		}
+		if path, ok := sf.imports[pkg.Name]; ok && strings.HasSuffix(path, actionsPkgSuffix) {
+			found = true
+			return false
+		}
+		return true
+	})
+	return found
+}
+
+// apiTypeOf recognises `apis.SysUser{}` and returns the package path and type.
+func apiTypeOf(sf *sourceFile, expr ast.Expr) (handlerKey, bool) {
+	lit, ok := expr.(*ast.CompositeLit)
+	if !ok {
+		return handlerKey{}, false
+	}
+	sel, ok := lit.Type.(*ast.SelectorExpr)
+	if !ok {
+		return handlerKey{}, false
+	}
+	pkg, ok := sel.X.(*ast.Ident)
+	if !ok {
+		return handlerKey{}, false
+	}
+	path, ok := sf.imports[pkg.Name]
+	if !ok {
+		return handlerKey{}, false
+	}
+	return handlerKey{Pkg: path, Type: sel.Sel.Name}, true
+}
+
+// groupSource reports whether expr builds a router group, and names the
+// variable it was built from when there is one.
+func groupSource(expr ast.Expr) (string, bool) {
+	parent := ""
+	isGroup := false
+	ast.Inspect(expr, func(n ast.Node) bool {
+		call, ok := n.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		sel, ok := call.Fun.(*ast.SelectorExpr)
+		if !ok || sel.Sel.Name != "Group" {
+			return true
+		}
+		isGroup = true
+		if id, ok := sel.X.(*ast.Ident); ok {
+			parent = id.Name
+		}
+		return true
+	})
+	return parent, isGroup
+}
+
+// groupPath returns the literal path a group was declared with, or "" when it
+// is not a literal - a computed prefix is left out of the message rather than
+// printed as something it is not.
+func groupPath(expr ast.Expr) string {
+	out := ""
+	ast.Inspect(expr, func(n ast.Node) bool {
+		call, ok := n.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		sel, ok := call.Fun.(*ast.SelectorExpr)
+		if !ok || sel.Sel.Name != "Group" || len(call.Args) == 0 {
+			return true
+		}
+		if lit, ok := call.Args[0].(*ast.BasicLit); ok {
+			out = strings.Trim(lit.Value, `"`)
+		}
+		return true
+	})
+	return out
+}
+
+// containsCallNamed reports whether expr contains a call to a function with
+// this name, at any depth of a method chain or argument list.
+func containsCallNamed(expr ast.Node, name string) bool {
+	found := false
+	ast.Inspect(expr, func(n ast.Node) bool {
+		if found {
+			return false
+		}
+		call, ok := n.(*ast.CallExpr)
+		if !ok {
+			return true
+		}
+		switch fun := call.Fun.(type) {
+		case *ast.SelectorExpr:
+			if fun.Sel.Name == name {
+				found = true
+				return false
+			}
+		case *ast.Ident:
+			if fun.Name == name {
+				found = true
+				return false
+			}
+		}
+		return true
+	})
+	return found
+}
+
+// receiverIdentOf returns the variable a `x.method(...)` call was made on.
+func receiverIdentOf(call *ast.CallExpr, method string) (string, bool) {
+	sel, ok := call.Fun.(*ast.SelectorExpr)
+	if !ok || sel.Sel.Name != method {
+		return "", false
+	}
+	id, ok := sel.X.(*ast.Ident)
+	if !ok {
+		return "", false
+	}
+	return id.Name, true
+}
+
+// httpMethods are the registration calls this check understands. Any and Match
+// are absent on purpose: they take the method as data, and a check that half
+// understands a registration is worse than one that says nothing about it.
+var httpMethods = map[string]bool{
+	"GET": true, "POST": true, "PUT": true, "DELETE": true, "PATCH": true, "HEAD": true, "OPTIONS": true,
+}
+
+// routeRegistration recognises `g.GET(...)` and names the group and method.
+func routeRegistration(call *ast.CallExpr) (string, string, bool) {
+	sel, ok := call.Fun.(*ast.SelectorExpr)
+	if !ok || !httpMethods[sel.Sel.Name] {
+		return "", "", false
+	}
+	id, ok := sel.X.(*ast.Ident)
+	if !ok {
+		return "", "", false
+	}
+	return id.Name, sel.Sel.Name, true
+}
+
+// routeArgs pulls the path and the `api.Handler` argument out of a
+// registration, ignoring any middleware written between them.
+func routeArgs(call *ast.CallExpr) (route, handlerVar, handlerName string, ok bool) {
+	if len(call.Args) < 2 {
+		return "", "", "", false
+	}
+	lit, isLit := call.Args[0].(*ast.BasicLit)
+	if !isLit {
+		return "", "", "", false
+	}
+	route = strings.Trim(lit.Value, `"`)
+	// The handler is the last argument; anything before it is middleware.
+	sel, isSel := call.Args[len(call.Args)-1].(*ast.SelectorExpr)
+	if !isSel {
+		return "", "", "", false
+	}
+	id, isIdent := sel.X.(*ast.Ident)
+	if !isIdent {
+		return "", "", "", false
+	}
+	return route, id.Name, sel.Sel.Name, true
+}

tools/checksilent/datascope_test.go

@@ -0,0 +1,163 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+// apisFile is a handler package with two methods: one that reads the caller's
+// data permission and one that does not.
+const apisFile = `package apis
+
+import (
+	"github.com/gin-gonic/gin"
+	"go-admin/common/actions"
+)
+
+type SysUser struct{}
+
+func (e SysUser) Scoped(c *gin.Context) {
+	p := actions.GetPermissionFromContext(c)
+	_ = p
+}
+
+func (e SysUser) Unscoped(c *gin.Context) {}
+`
+
+func routerFile(uses string) string {
+	return `package router
+
+import (
+	"github.com/gin-gonic/gin"
+	"go-admin/app/admin/apis"
+	"go-admin/common/actions"
+)
+
+var _ = actions.PermissionAction
+
+func register(v1 *gin.RouterGroup) {
+	api := apis.SysUser{}
+	r := v1.Group("/sys-user")` + uses + `
+	{
+		r.GET("/:id", api.Scoped)
+	}
+}
+`
+}
+
+// The mistake itself: a handler that reads the permission, on a group that
+// never installs the middleware which puts one there.
+func TestDataScopeRouteWithoutTheMiddlewareIsReported(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/admin/apis/sys_user.go":   apisFile,
+		"app/admin/router/sys_user.go": routerFile(`.Use(gin.Logger())`),
+	})
+	f := requireOne(t, check(t, root, options{}), checkDataScopeRoute)
+	for _, want := range []string{`GET "/sys-user/:id"`, "SysUser.Scoped", "PermissionAction"} {
+		if !strings.Contains(f.Message, want) {
+			t.Errorf("message does not mention %q:\n%s", want, f.Message)
+		}
+	}
+}
+
+// The middleware installed in the chain is the fix, and must silence it.
+func TestDataScopeRouteWithTheMiddlewareIsQuiet(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/admin/apis/sys_user.go":   apisFile,
+		"app/admin/router/sys_user.go": routerFile(`.Use(gin.Logger()).Use(actions.PermissionAction())`),
+	})
+	if got := only(t, check(t, root, options{}), checkDataScopeRoute); len(got) != 0 {
+		t.Errorf("reported %d findings for a guarded group:\n%v", len(got), got)
+	}
+}
+
+// The other fix - the handler stops reading the permission - must silence it
+// too. Reporting a route whose handler needs no scope would push people to
+// install middleware they do not want, which is how /getinfo would have been
+// "fixed" into rejecting every user who did not create their own account.
+func TestARouteWhoseHandlerReadsNoPermissionIsQuiet(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/admin/apis/sys_user.go": apisFile,
+		"app/admin/router/sys_user.go": `package router
+
+import (
+	"github.com/gin-gonic/gin"
+	"go-admin/app/admin/apis"
+)
+
+func register(v1 *gin.RouterGroup) {
+	api := apis.SysUser{}
+	r := v1.Group("")
+	{
+		r.GET("/getinfo", api.Unscoped)
+	}
+}
+`,
+	})
+	if got := only(t, check(t, root, options{}), checkDataScopeRoute); len(got) != 0 {
+		t.Errorf("reported %d findings for a handler that reads no permission:\n%v", len(got), got)
+	}
+}
+
+// gin copies the parent's handler chain into a subgroup, so a group carved out
+// of a guarded one is guarded. Reporting it would be a false positive, and a
+// check that cries wolf is one people switch off.
+func TestASubgroupInheritsTheMiddleware(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/admin/apis/sys_user.go": apisFile,
+		"app/admin/router/sys_user.go": `package router
+
+import (
+	"github.com/gin-gonic/gin"
+	"go-admin/app/admin/apis"
+	"go-admin/common/actions"
+)
+
+func register(v1 *gin.RouterGroup) {
+	api := apis.SysUser{}
+	parent := v1.Group("/sys").Use(actions.PermissionAction())
+	child := parent.Group("/user")
+	{
+		child.GET("/:id", api.Scoped)
+	}
+}
+`,
+	})
+	if got := only(t, check(t, root, options{}), checkDataScopeRoute); len(got) != 0 {
+		t.Errorf("reported %d findings for a subgroup of a guarded group:\n%v", len(got), got)
+	}
+}
+
+// Two packages can both declare a SysUser. Only the one whose method reads the
+// permission may be reported, or the check becomes a name search.
+func TestAHandlerIsMatchedByPackageNotJustName(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"app/admin/apis/sys_user.go": apisFile,
+		"app/other/apis/sys_user.go": `package apis
+
+import "github.com/gin-gonic/gin"
+
+type SysUser struct{}
+
+func (e SysUser) Scoped(c *gin.Context) {}
+`,
+		"app/other/router/sys_user.go": `package router
+
+import (
+	"github.com/gin-gonic/gin"
+	"go-admin/app/other/apis"
+)
+
+func register(v1 *gin.RouterGroup) {
+	api := apis.SysUser{}
+	r := v1.Group("/other")
+	{
+		r.GET("/:id", api.Scoped)
+	}
+}
+`,
+	})
+	if got := only(t, check(t, root, options{}), checkDataScopeRoute); len(got) != 0 {
+		t.Errorf("reported %d findings for a same-named handler in another package:\n%v", len(got), got)
+	}
+}

tools/checksilent/main.go

@@ -1,13 +1,23 @@
 // Command checksilent reports the failures in this repository that do not
 // announce themselves: no error, no log line, behaviour quietly wrong.
 //
-// Six checks, five of them ERROR and one WARN. An ERROR fails the run; a WARN
-// prints and does not. The split is not about how bad the consequence is - all
-// six are bad - but about how certain the detection is. Everything reported as
-// an ERROR is decided from this repository's own syntax. The one WARN compares
-// against a second repository through a regular expression, and a check that
-// can be wrong must not be able to stop a build, or the first response to it
-// will be an ignore comment.
+// An ERROR fails the run; a WARN prints and does not. The split is not about
+// how bad the consequence is - every one of these is bad - but about how much
+// room is left to act.
+//
+// Most of them report only ERROR: each is decided from this repository's own
+// files and is either true or not. The menu-name check reports only WARN,
+// because it compares against a second repository through a regular
+// expression, and a check that can be wrong must not be able to stop a build
+// or the first response to it will be an ignore comment. The two
+// shutdown-budget checks report at both levels from one arithmetic: a budget
+// that already overruns is an ERROR, and one that fits with no headroom left
+// is a WARN - it works today, so failing the build on it would be failing a
+// correct configuration.
+//
+// The list of checks is runChecks in checks.go. It is deliberately not
+// repeated here as a count: the two places that carried one were both wrong by
+// the time anybody looked.
 //
 // Usage:
 //
@@ -102,4 +112,16 @@ func printSummary(w io.Writer, findings []Finding, opt options, s *snapshot) {
 		fmt.Fprintf(w, "The %s check covered %s; %s does not exist here and was not scanned.\n",
 			checkImportBoundary, strings.Join(scanned, ", "), strings.Join(absent, ", "))
 	}
+	// Same reason: a tree with no alias into core's contract packages gives
+	// this check nothing to look at, and its silence must not be read as a
+	// pass. That is now the interesting case rather than the expected one -
+	// the shims exist, so a count of zero means they stopped being aliases,
+	// or stopped being here.
+	if n := ScannedShimAliases(s); n == 0 {
+		fmt.Fprintf(w, "The %s check found no type alias into core's contract packages and guarded nothing.\n",
+			checkShimAlias)
+	} else {
+		fmt.Fprintf(w, "The %s check covered %d type alias(es) into core's contract packages.\n",
+			checkShimAlias, n)
+	}
 }

tools/checksilent/shutdownbudget.go

@@ -0,0 +1,651 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+
+	yaml "go.yaml.in/yaml/v3"
+)
+
+// The files this check compares, and the package the fallbacks come from.
+const (
+	settingsFile     = "config/settings.yml"
+	k8sDeployFile    = "scripts/k8s/deploy.yml"
+	pkgHostConfig    = "config"
+	drainConstName   = "DefaultDrainSeconds"
+	serverConstName  = "DefaultServerSeconds"
+	cleanupConstName = "DefaultCleanupSeconds"
+)
+
+// graceMarginSeconds is the headroom a shutdown budget needs beyond itself.
+//
+// Spelled once and used by both checks below, because they fail the same way:
+// somebody raises a budget in config/settings.yml and does not go looking for
+// the two other places that have to allow room for it. Two margins would
+// eventually be two different numbers.
+const graceMarginSeconds = 5
+
+// checkShutdownBudgetFitsGrace compares the shutdown budget this repository
+// ships against the stop grace period its own Kubernetes manifest allows.
+//
+// The two are not merely adjacent examples. scripts/k8s/prerun.sh builds the
+// settings-admin ConfigMap out of config/settings.yml, and the Deployment
+// mounts that ConfigMap - so the manifest deploys that file.
+//
+// The budgets are spent one after the other, and when their sum reaches
+// terminationGracePeriodSeconds the kubelet sends SIGKILL while the cleanup
+// callbacks are still running. Nothing reports it: the pod disappears
+// mid-shutdown and it reads as a crash rather than as a number that was raised
+// in one file and not the other. Which is how it would be raised - drain is
+// the interesting knob and the grace period is in a different directory.
+//
+// Two levels, and an overrun is not also reported as a shortage of headroom:
+// every Error satisfies the Warn condition too, and an Error that always drags
+// a duplicate Warn behind it teaches people to skip Warns.
+//
+// A preStop hook counts, even though the shipped manifest has none. It is
+// spent before the process is told anything, so it is added to the budget
+// rather than overlapping it - and a self-check that cannot see it would
+// understate the real cost by however long somebody set it to, which is worse
+// than not checking.
+//
+// It reports nothing when either file is absent and when the manifest sets no
+// grace period, because there is then no second number to disagree with.
+func checkShutdownBudgetFitsGrace(s *snapshot) ([]Finding, error) {
+	budget, ok, err := shippedShutdownBudget(s)
+	if err != nil || !ok {
+		return nil, err
+	}
+	m, ok, err := readManifest(s)
+	if err != nil || !ok {
+		return nil, err
+	}
+	if m.grace == nil {
+		return nil, nil
+	}
+
+	var out []Finding
+	if m.preStopUnreadable {
+		out = append(out, Finding{
+			Check:    checkShutdownGrace,
+			Severity: Warn.String(),
+			File:     k8sDeployFile,
+			Line:     m.preStopLine,
+			Col:      1,
+			Message: "this preStop hook is not a sleep, so how long it takes cannot be read here " +
+				"and is not in the sum below; it is spent before the process is told anything, " +
+				"so whatever it costs has to fit inside terminationGracePeriodSeconds as well.",
+			severity: Warn,
+		})
+	}
+
+	total := m.preStop + budget.drain + budget.server + budget.cleanup
+	grace := *m.grace
+	spelled := fmt.Sprintf("preStop %d + drain %d + server %d + cleanup %d",
+		m.preStop, budget.drain, budget.server, budget.cleanup)
+
+	switch {
+	case total >= grace:
+		out = append(out, Finding{
+			Check:    checkShutdownGrace,
+			Severity: Error.String(),
+			File:     k8sDeployFile,
+			Line:     m.graceLine,
+			Col:      1,
+			Message: fmt.Sprintf(
+				"terminationGracePeriodSeconds is %d and the shutdown takes %d (%s, from %s); "+
+					"SIGKILL would arrive while the cleanup callbacks are still running. "+
+					"Raise it to %d, or take %d off the budget.",
+				grace, total, spelled, settingsFile,
+				total+graceMarginSeconds, total+graceMarginSeconds-grace),
+			severity: Error,
+		})
+	case total+graceMarginSeconds > grace:
+		out = append(out, Finding{
+			Check:    checkShutdownGrace,
+			Severity: Warn.String(),
+			File:     k8sDeployFile,
+			Line:     m.graceLine,
+			Col:      1,
+			Message: fmt.Sprintf(
+				"terminationGracePeriodSeconds is %d and the shutdown takes %d (%s, from %s), "+
+					"which leaves under %ds of headroom; a callback that runs slightly long is "+
+					"cut off. Raise it to %d.",
+				grace, total, spelled, settingsFile, graceMarginSeconds, total+graceMarginSeconds),
+			severity: Warn,
+		})
+	}
+	return out, nil
+}
+
+// dockerStopArgs matches a stop command in a script or a workflow.
+var (
+	dockerStopArgs = regexp.MustCompile(`\bdocker\s+stop\b`)
+	// --timeout is the current name, --time its deprecated spelling and -t the
+	// short form; docker still accepts all three, so all three are read. The
+	// long name comes first because --time is a prefix of it, and a flag that
+	// the check cannot read is reported as no deadline at all - which would
+	// have this tool pressing people towards the deprecated spelling.
+	dockerStopTime = regexp.MustCompile(`(--timeout|--time|-t)[=\s]*(\d+)`)
+)
+
+// checkDockerStopGrace reports a stop path that does not allow this process
+// the time it spends shutting down.
+//
+// docker allows ten seconds unless told otherwise, and that number is nowhere
+// near the command - so a budget raised in config/settings.yml passes every
+// test, deploys, and then has its cleanup callbacks killed on the next
+// release. Same failure as the manifest's grace period, same arithmetic, same
+// margin; only the file it lives in is different.
+//
+// Both ways of stopping this repository's container are covered, because
+// covering one of two identical paths is what produces a clean run that means
+// nothing: `docker stop` in a workflow or a script, and stop_grace_period in
+// the compose file the Makefile's own `make run` uses.
+//
+// An absent deadline is reported rather than assumed to be ten: the value that
+// applies is then invisible at the call site and cannot follow the budget.
+func checkDockerStopGrace(s *snapshot) ([]Finding, error) {
+	budget, ok, err := shippedShutdownBudget(s)
+	if err != nil || !ok {
+		return nil, err
+	}
+	total := budget.drain + budget.server + budget.cleanup
+	spelled := fmt.Sprintf("drain %d + server %d + cleanup %d",
+		budget.drain, budget.server, budget.cleanup)
+
+	sites, err := findStopDeadlines(s)
+	if err != nil {
+		return nil, err
+	}
+
+	var out []Finding
+	for _, site := range sites {
+		finding := Finding{
+			Check: checkDockerStop,
+			File:  site.file,
+			Line:  site.line,
+			Col:   1,
+		}
+		switch {
+		case !site.set:
+			finding.Severity, finding.severity = Error.String(), Error
+			finding.Message = fmt.Sprintf(
+				"%s allows the default %d seconds, and this process spends %d shutting down "+
+					"(%s, from %s). %s.",
+				site.what, dockerDefaultGraceSeconds, total, spelled, settingsFile,
+				site.fix(total+graceMarginSeconds))
+		case site.seconds <= total:
+			finding.Severity, finding.severity = Error.String(), Error
+			finding.Message = fmt.Sprintf(
+				"%s allows %d seconds and this shutdown takes %d (%s, from %s); the cleanup "+
+					"callbacks are killed part-way through. %s.",
+				site.what, site.seconds, total, spelled, settingsFile,
+				site.fix(total+graceMarginSeconds))
+		case site.seconds < total+graceMarginSeconds:
+			finding.Severity, finding.severity = Warn.String(), Warn
+			finding.Message = fmt.Sprintf(
+				"%s allows %d seconds over a shutdown that takes %d (%s, from %s), which leaves "+
+					"under %ds of headroom. %s.",
+				site.what, site.seconds, total, spelled, settingsFile, graceMarginSeconds,
+				site.fix(total+graceMarginSeconds))
+		default:
+			continue
+		}
+		out = append(out, finding)
+	}
+	return out, nil
+}
+
+// dockerDefaultGraceSeconds is what docker allows a container to stop in when
+// nothing says otherwise. It applies to `docker stop` and to compose alike.
+const dockerDefaultGraceSeconds = 10
+
+// stopSite is one place this repository decides how long a container gets.
+type stopSite struct {
+	file string
+	line int
+	// what names the setting in the finding, in the spelling of the file it
+	// was found in.
+	what string
+	// compose says which of the two fixes to suggest.
+	compose bool
+	seconds int
+	set     bool
+}
+
+func (s stopSite) fix(seconds int) string {
+	if s.compose {
+		return fmt.Sprintf("Set stop_grace_period: %ds", seconds)
+	}
+	return fmt.Sprintf("Pass --timeout %d", seconds)
+}
+
+func findStopDeadlines(s *snapshot) ([]stopSite, error) {
+	sites, err := findDockerStops(s.Root)
+	if err != nil {
+		return nil, err
+	}
+	compose, err := findComposeServices(s)
+	if err != nil {
+		return nil, err
+	}
+	return append(sites, compose...), nil
+}
+
+// dockerStopExtensions and dockerStopNames are where a stop command can be
+// written in this repository: workflows, shell scripts and the Makefile.
+var (
+	dockerStopExtensions = map[string]bool{".yml": true, ".yaml": true, ".sh": true, ".bash": true}
+	dockerStopNames      = map[string]bool{"Makefile": true, "makefile": true}
+)
+
+func findDockerStops(root string) ([]stopSite, error) {
+	var out []stopSite
+	err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			if path != root && skippedDirs[info.Name()] {
+				return filepath.SkipDir
+			}
+			return nil
+		}
+		if !dockerStopExtensions[filepath.Ext(path)] && !dockerStopNames[info.Name()] {
+			return nil
+		}
+		b, err := os.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		rel, err := filepath.Rel(root, path)
+		if err != nil {
+			return err
+		}
+		for i, line := range strings.Split(string(b), "\n") {
+			// A commented-out command is not one that runs, and the settings
+			// file describes `docker stop` in prose right beside the budget
+			// this check reads.
+			if trimmed := strings.TrimSpace(line); strings.HasPrefix(trimmed, "#") {
+				continue
+			}
+			if !dockerStopArgs.MatchString(line) {
+				continue
+			}
+			site := stopSite{
+				file: filepath.ToSlash(rel),
+				line: i + 1,
+				what: "`docker stop` with no --timeout",
+			}
+			if m := dockerStopTime.FindStringSubmatch(line); m != nil {
+				seconds, err := strconv.Atoi(m[2])
+				if err != nil {
+					continue
+				}
+				// Quoted back in the spelling it was written in, so the
+				// message cannot misreport what the line says.
+				site.what = fmt.Sprintf("`docker stop %s %d`", m[1], seconds)
+				site.seconds, site.set = seconds, true
+			}
+			out = append(out, site)
+		}
+		return nil
+	})
+	return out, err
+}
+
+type shutdownSeconds struct{ drain, server, cleanup int }
+
+// shippedShutdownBudget reads extend.shutdown out of the settings file this
+// repository ships, filling in whatever it leaves out from the Go constants
+// that do the same at run time.
+//
+// Taking the fallbacks from the snapshot rather than repeating 0/5/3 here is
+// what keeps this honest when the defaults move: a tool that carries its own
+// copy of the number it is checking eventually checks the wrong one.
+//
+// A negative value is left alone. config.Shutdown.Budget refuses it and the
+// server does not start, so it is not a failure that passes unnoticed - and
+// adding a negative into the sums above would understate them.
+func shippedShutdownBudget(s *snapshot) (shutdownSeconds, bool, error) {
+	raw, ok, err := readRepoFile(s, settingsFile)
+	if err != nil || !ok {
+		return shutdownSeconds{}, false, err
+	}
+
+	var doc struct {
+		Settings struct {
+			Extend struct {
+				Shutdown *struct {
+					Drain   *int `yaml:"drain"`
+					Server  *int `yaml:"server"`
+					Cleanup *int `yaml:"cleanup"`
+				} `yaml:"shutdown"`
+			} `yaml:"extend"`
+		} `yaml:"settings"`
+	}
+	if err := yaml.Unmarshal(raw, &doc); err != nil {
+		return shutdownSeconds{}, false, fmt.Errorf("%s: %w", settingsFile, err)
+	}
+	section := doc.Settings.Extend.Shutdown
+	if section == nil {
+		return shutdownSeconds{}, false, nil
+	}
+
+	defaults, ok := s.hostConfigDefaults()
+	if !ok {
+		// The constants moved or were renamed. Reporting nothing would let the
+		// check go quiet, which is the failure it exists to catch, so this
+		// stops the run instead.
+		return shutdownSeconds{}, false, fmt.Errorf(
+			"%s has extend.shutdown but package %s declares no %s/%s/%s to fall back on",
+			settingsFile, pkgHostConfig, drainConstName, serverConstName, cleanupConstName)
+	}
+
+	budget := shutdownSeconds{
+		drain:   orDefault(section.Drain, defaults.drain),
+		server:  orDefault(section.Server, defaults.server),
+		cleanup: orDefault(section.Cleanup, defaults.cleanup),
+	}
+	if budget.drain < 0 || budget.server < 0 || budget.cleanup < 0 {
+		return shutdownSeconds{}, false, nil
+	}
+	return budget, true, nil
+}
+
+func orDefault(configured *int, fallback int) int {
+	if configured != nil {
+		return *configured
+	}
+	return fallback
+}
+
+// hostConfigDefaults reads the three fallback constants out of the parsed tree.
+func (s *snapshot) hostConfigDefaults() (shutdownSeconds, bool) {
+	for _, sf := range s.Files {
+		if sf.Pkg != s.pkg(pkgHostConfig) {
+			continue
+		}
+		drain, okDrain := sf.consts[drainConstName]
+		server, okServer := sf.consts[serverConstName]
+		cleanup, okCleanup := sf.consts[cleanupConstName]
+		if okDrain && okServer && okCleanup {
+			return shutdownSeconds{int(drain), int(server), int(cleanup)}, true
+		}
+	}
+	return shutdownSeconds{}, false
+}
+
+// manifest is what the shipped Deployment says about how long it will wait.
+type manifest struct {
+	grace     *int
+	graceLine int
+	// preStop is the longest sleep any container's hook performs, since the
+	// hooks of several containers run at the same time.
+	preStop     int
+	preStopLine int
+
+	preStopUnreadable bool
+}
+
+var preStopSleep = regexp.MustCompile(`\bsleep\s+(\d+)s?\b`)
+
+// readManifest finds the grace period and the preStop hooks in the shipped
+// manifest, with the lines they are on so a finding can be opened at them.
+//
+// The file holds several documents and only the Deployment carries a pod
+// template, so every document is decoded and the first one with a grace period
+// wins.
+func readManifest(s *snapshot) (manifest, bool, error) {
+	raw, ok, err := readRepoFile(s, k8sDeployFile)
+	if err != nil || !ok {
+		return manifest{}, false, err
+	}
+
+	dec := yaml.NewDecoder(bytes.NewReader(raw))
+	for {
+		var doc struct {
+			Spec struct {
+				Template struct {
+					Spec struct {
+						Grace      *int `yaml:"terminationGracePeriodSeconds"`
+						Containers []struct {
+							Lifecycle struct {
+								// A value, not a pointer: yaml.v3 only hands
+								// the raw node to a field of type yaml.Node,
+								// and a *yaml.Node field is allocated and left
+								// empty - which reads as "the hook is there but
+								// unreadable" for every manifest that has one.
+								PreStop yaml.Node `yaml:"preStop"`
+							} `yaml:"lifecycle"`
+						} `yaml:"containers"`
+					} `yaml:"spec"`
+				} `yaml:"template"`
+			} `yaml:"spec"`
+		}
+		switch err := dec.Decode(&doc); {
+		case errors.Is(err, io.EOF):
+			return manifest{}, false, nil
+		case err != nil:
+			return manifest{}, false, fmt.Errorf("%s: %w", k8sDeployFile, err)
+		}
+
+		pod := doc.Spec.Template.Spec
+		if pod.Grace == nil && len(pod.Containers) == 0 {
+			continue
+		}
+
+		m := manifest{
+			grace:     pod.Grace,
+			graceLine: lineOf(raw, "terminationGracePeriodSeconds:"),
+		}
+		for _, c := range pod.Containers {
+			hook := c.Lifecycle.PreStop
+			if hook.Kind == 0 {
+				continue
+			}
+			m.preStopLine = hook.Line
+			if seconds, ok := preStopSeconds(&hook); ok {
+				// The longest one, not the sum: the hooks of several
+				// containers run at the same time.
+				if seconds > m.preStop {
+					m.preStop = seconds
+				}
+				continue
+			}
+			m.preStopUnreadable = true
+		}
+		if m.grace == nil {
+			continue
+		}
+		return m, true, nil
+	}
+}
+
+// preStopSeconds reads how long a hook sleeps for.
+//
+// Every scalar under the hook is joined and searched, because the sleep can be
+// written as one argument or as several: ["sh","-c","sleep 10"] and
+// ["sleep","10"] both wait ten seconds.
+func preStopSeconds(node *yaml.Node) (int, bool) {
+	var words []string
+	var walk func(*yaml.Node)
+	walk = func(n *yaml.Node) {
+		if n == nil {
+			return
+		}
+		if n.Kind == yaml.ScalarNode {
+			words = append(words, n.Value)
+		}
+		for _, child := range n.Content {
+			walk(child)
+		}
+	}
+	walk(node)
+
+	m := preStopSleep.FindStringSubmatch(strings.Join(words, " "))
+	if m == nil {
+		return 0, false
+	}
+	seconds, err := strconv.Atoi(m[1])
+	if err != nil {
+		return 0, false
+	}
+	return seconds, true
+}
+
+// lineOf locates a key for a finding's position. A miss reports line 1 rather
+// than failing: the position is where to look, and the message is the finding.
+func lineOf(content []byte, key string) int {
+	for i, l := range strings.Split(string(content), "\n") {
+		if strings.Contains(l, key) && !strings.HasPrefix(strings.TrimSpace(l), "#") {
+			return i + 1
+		}
+	}
+	return 1
+}
+
+// readRepoFile reads a file relative to the scanned root, reporting absence
+// rather than failing on it: the checks run over fixtures that carry only what
+// the check under test needs.
+func readRepoFile(s *snapshot, rel string) ([]byte, bool, error) {
+	b, err := os.ReadFile(filepath.Join(s.Root, filepath.FromSlash(rel)))
+	switch {
+	case errors.Is(err, os.ErrNotExist):
+		return nil, false, nil
+	case err != nil:
+		return nil, false, err
+	}
+	return b, true, nil
+}
+
+// composeFiles are the names Docker Compose looks for, in its own order of
+// preference.
+var composeFiles = []string{"compose.yaml", "compose.yml", "docker-compose.yaml", "docker-compose.yml"}
+
+// composeDuration matches the durations compose accepts for
+// stop_grace_period: a bare number of seconds, or hours, minutes and seconds
+// in that order.
+var composeDuration = regexp.MustCompile(`^(?:(\d+)h)?(?:(\d+)m)?(?:(\d+)s?)?$`)
+
+// findComposeServices reports the stop_grace_period of every compose service
+// that runs this repository's own image.
+//
+// Only those services. The grace period of a database or a cache alongside it
+// is not this process's shutdown budget, and reporting one against the other
+// would be arithmetic about two unrelated things.
+func findComposeServices(s *snapshot) ([]stopSite, error) {
+	var out []stopSite
+	for _, name := range composeFiles {
+		raw, ok, err := readRepoFile(s, name)
+		if err != nil {
+			return nil, err
+		}
+		if !ok {
+			continue
+		}
+
+		var root yaml.Node
+		if err := yaml.Unmarshal(raw, &root); err != nil {
+			return nil, fmt.Errorf("%s: %w", name, err)
+		}
+		if len(root.Content) == 0 {
+			continue
+		}
+		services := mapValue(root.Content[0], "services")
+		if services == nil {
+			continue
+		}
+
+		for i := 0; i+1 < len(services.Content); i += 2 {
+			key, service := services.Content[i], services.Content[i+1]
+			if !runsThisRepo(service, s.ModulePath) {
+				continue
+			}
+			site := stopSite{
+				file:    name,
+				line:    key.Line,
+				what:    fmt.Sprintf("service %s, which sets no stop_grace_period,", key.Value),
+				compose: true,
+			}
+			if grace := mapValue(service, "stop_grace_period"); grace != nil {
+				seconds, ok := composeSeconds(grace.Value)
+				if !ok {
+					// A duration this cannot read is left alone rather than
+					// guessed at: compose knows what it means, and inventing a
+					// number here would report against a value nobody wrote.
+					continue
+				}
+				site.line = grace.Line
+				site.what = fmt.Sprintf("stop_grace_period on service %s", key.Value)
+				site.seconds, site.set = seconds, true
+			}
+			out = append(out, site)
+		}
+	}
+	return out, nil
+}
+
+// runsThisRepo reports whether a compose service starts the image this
+// repository builds - by building it, or by naming it.
+func runsThisRepo(service *yaml.Node, modulePath string) bool {
+	if mapValue(service, "build") != nil {
+		return true
+	}
+	image := mapValue(service, "image")
+	if image == nil {
+		return false
+	}
+	repository := image.Value
+	if i := strings.LastIndex(repository, ":"); i > strings.LastIndex(repository, "/") {
+		repository = repository[:i]
+	}
+	return baseName(repository) == baseName(modulePath)
+}
+
+func baseName(path string) string {
+	if i := strings.LastIndex(path, "/"); i >= 0 {
+		return path[i+1:]
+	}
+	return path
+}
+
+func composeSeconds(value string) (int, bool) {
+	m := composeDuration.FindStringSubmatch(strings.TrimSpace(value))
+	if m == nil || m[1]+m[2]+m[3] == "" {
+		return 0, false
+	}
+	var total int
+	for i, unit := range []int{3600, 60, 1} {
+		if m[i+1] == "" {
+			continue
+		}
+		n, err := strconv.Atoi(m[i+1])
+		if err != nil {
+			return 0, false
+		}
+		total += n * unit
+	}
+	return total, true
+}
+
+// mapValue returns the value a mapping node holds for key.
+func mapValue(node *yaml.Node, key string) *yaml.Node {
+	if node == nil || node.Kind != yaml.MappingNode {
+		return nil
+	}
+	for i := 0; i+1 < len(node.Content); i += 2 {
+		if node.Content[i].Value == key {
+			return node.Content[i+1]
+		}
+	}
+	return nil
+}

tools/checksilent/shutdownbudget_test.go

@@ -0,0 +1,484 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+// hostConfigSource is the part of config/extend.go this check reads: the
+// fallbacks it applies to whatever the settings file leaves out.
+const hostConfigSource = `package config
+
+const (
+	DefaultDrainSeconds   = 0
+	DefaultServerSeconds  = 5
+	DefaultCleanupSeconds = 3
+)
+`
+
+// factorySettings is what this repository ships: 0 + 5 + 3.
+const factorySettings = "settings:\n  extend:\n    shutdown:\n      drain: 0\n      server: 5\n      cleanup: 3\n"
+
+func settingsWith(shutdown string) string {
+	return "settings:\n  extend:\n" + shutdown
+}
+
+// deployWith builds a manifest with the given container extras and pod-level
+// lines, in the shape the shipped one has.
+func deployWith(containerExtra, podExtra string) string {
+	return `---
+apiVersion: v1
+kind: Service
+metadata:
+  name: go-admin
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: go-admin-v1
+spec:
+  replicas: 1
+  template:
+    spec:
+      containers:
+      - name: go-admin
+        image: go-admin
+` + containerExtra + podExtra
+}
+
+func graceOf(seconds string) string {
+	return "      terminationGracePeriodSeconds: " + seconds + "\n"
+}
+
+const preStopSleep25 = `        lifecycle:
+          preStop:
+            exec:
+              command: ["sh", "-c", "sleep 25"]
+`
+
+// The six scenarios worked through in the technical plan, plus the one that
+// only fails when preStop is left out of the sum.
+//
+// The values matter. "raise server to 25" gives 28, which is under a grace
+// period of 30 and reaches only the WARN level - it would not show that the
+// ERROR level works at all.
+func TestShutdownBudgetAgainstTheGracePeriod(t *testing.T) {
+	for _, tc := range []struct {
+		name     string
+		settings string
+		deploy   string
+		want     Severity
+		contains string
+	}{
+		{
+			name:     "the shipped defaults, with headroom",
+			settings: factorySettings,
+			deploy:   deployWith("", graceOf("30")),
+			want:     -1,
+		},
+		{
+			// The one this check exists for: drain is the interesting knob and
+			// the grace period is in another directory, so raising one and not
+			// the other is the natural mistake.
+			name:     "the budget was raised and the manifest was not",
+			settings: settingsWith("    shutdown:\n      drain: 0\n      server: 30\n      cleanup: 3\n"),
+			deploy:   deployWith("", graceOf("30")),
+			want:     Error,
+			contains: "preStop 0 + drain 0 + server 30 + cleanup 3",
+		},
+		{
+			// Equal is not a fit: the grace period is when SIGKILL is sent, so
+			// a budget that ends exactly then leaves nothing time to return.
+			name:     "the grace period was lowered to the budget",
+			settings: factorySettings,
+			deploy:   deployWith("", graceOf("8")),
+			want:     Error,
+		},
+		{
+			name:     "fits, but with nothing to spare",
+			settings: factorySettings,
+			deploy:   deployWith("", graceOf("12")),
+			want:     Warn,
+			contains: "leaves under 5s of headroom",
+		},
+		{
+			// The hook is spent before the process is told anything, so it is
+			// added to the budget rather than overlapping it.
+			name:     "a preStop hook is part of the budget",
+			settings: factorySettings,
+			deploy:   deployWith(preStopSleep25, graceOf("30")),
+			want:     Error,
+			contains: "preStop 25 + drain 0 + server 5 + cleanup 3",
+		},
+		{
+			// The example from the review: 10 + 10 + 5 + 3 against 30.
+			name:     "preStop and a drain window together, just fitting",
+			settings: settingsWith("    shutdown:\n      drain: 10\n      server: 5\n      cleanup: 3\n"),
+			deploy: deployWith(`        lifecycle:
+          preStop:
+            exec:
+              command: ["sleep", "10"]
+`, graceOf("30")),
+			want: Warn,
+		},
+		{
+			name:     "no shutdown section",
+			settings: settingsWith("    rateLimit:\n      inboundQPS: 200\n"),
+			deploy:   deployWith("", graceOf("30")),
+			want:     -1,
+		},
+		{
+			// Nothing to disagree with. A manifest without a grace period gets
+			// the Kubernetes default, which this file cannot see, and guessing
+			// at it would make the check wrong rather than quiet.
+			name:     "the manifest sets no grace period",
+			settings: settingsWith("    shutdown:\n      drain: 300\n"),
+			deploy:   deployWith("", ""),
+			want:     -1,
+		},
+		{
+			// config.Shutdown.Budget refuses this and the server does not
+			// start, so it is not a failure that passes unnoticed - and adding
+			// a negative into the sum would understate it.
+			name:     "a negative budget is left to the run-time refusal",
+			settings: settingsWith("    shutdown:\n      drain: -100\n      server: 5\n      cleanup: 3\n"),
+			deploy:   deployWith("", graceOf("5")),
+			want:     -1,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			root := fixture(t, map[string]string{
+				"config/extend.go":       hostConfigSource,
+				"config/settings.yml":    tc.settings,
+				"scripts/k8s/deploy.yml": tc.deploy,
+			})
+			got := only(t, check(t, root, options{}), checkShutdownGrace)
+			if tc.want < 0 {
+				if len(got) != 0 {
+					t.Fatalf("reported %d findings, want none:\n%v", len(got), got)
+				}
+				return
+			}
+			if len(got) != 1 {
+				// An ERROR also satisfies the WARN condition, so a second
+				// finding here means the two levels were not made exclusive -
+				// and an ERROR that always drags a duplicate WARN behind it
+				// teaches people to skip WARNs.
+				t.Fatalf("reported %d findings, want exactly 1:\n%v", len(got), got)
+			}
+			if got[0].severity != tc.want {
+				t.Errorf("reported %s, want %s: %s", got[0].Severity, tc.want, got[0].Message)
+			}
+			if tc.contains != "" && !strings.Contains(got[0].Message, tc.contains) {
+				t.Errorf("message %q does not contain %q", got[0].Message, tc.contains)
+			}
+			if got[0].File != k8sDeployFile {
+				t.Errorf("reported against %s, want %s", got[0].File, k8sDeployFile)
+			}
+			if want := lineOf([]byte(tc.deploy), "terminationGracePeriodSeconds:"); got[0].Line != want {
+				t.Errorf("reported line %d, want %d", got[0].Line, want)
+			}
+		})
+	}
+}
+
+// A hook whose duration cannot be read is said out loud rather than counted as
+// nothing. It is still spent inside the grace period, and a self-check that
+// silently valued it at zero would be the understatement this check exists to
+// prevent.
+func TestAnUnreadablePreStopIsReported(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"config/extend.go":    hostConfigSource,
+		"config/settings.yml": factorySettings,
+		"scripts/k8s/deploy.yml": deployWith(`        lifecycle:
+          preStop:
+            httpGet:
+              path: /drain
+              port: 8000
+`, graceOf("30")),
+	})
+	got := only(t, check(t, root, options{}), checkShutdownGrace)
+	if len(got) != 1 {
+		t.Fatalf("reported %d findings, want 1:\n%v", len(got), got)
+	}
+	if got[0].severity != Warn {
+		t.Errorf("reported %s, want WARN", got[0].Severity)
+	}
+	if !strings.Contains(got[0].Message, "not a sleep") {
+		t.Errorf("message %q does not say why the hook could not be read", got[0].Message)
+	}
+}
+
+// Either file missing means there is nothing to compare, which is the state
+// every other check's fixture is in.
+func TestShutdownBudgetIsSkippedWithoutBothFiles(t *testing.T) {
+	for _, files := range []map[string]string{
+		{"config/extend.go": hostConfigSource},
+		{"config/extend.go": hostConfigSource, "config/settings.yml": settingsWith("    shutdown:\n      drain: 300\n")},
+		{"config/extend.go": hostConfigSource, "scripts/k8s/deploy.yml": deployWith("", graceOf("30"))},
+	} {
+		root := fixture(t, files)
+		if got := only(t, check(t, root, options{}), checkShutdownGrace); len(got) != 0 {
+			t.Errorf("reported %d findings with only %d file(s):\n%v", len(got), len(files), got)
+		}
+	}
+}
+
+// A tool that cannot find the defaults it is meant to apply has to say so.
+// Reporting nothing would be the failure this whole tool is about: a check
+// that stops checking and goes on printing a clean run.
+func TestShutdownBudgetStopsWhenTheFallbacksAreGone(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"config/extend.go":       "package config\n\nconst DefaultDrainSeconds = 0\n",
+		"config/settings.yml":    settingsWith("    shutdown:\n      drain: 1\n"),
+		"scripts/k8s/deploy.yml": deployWith("", graceOf("30")),
+	})
+	s, err := load(root)
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if _, err := runChecks(s, options{}); err == nil {
+		t.Fatal("runChecks succeeded with the fallback constants renamed away")
+	} else if !strings.Contains(err.Error(), serverConstName) {
+		t.Errorf("error %q does not name the missing constant", err)
+	}
+}
+
+// The same arithmetic and the same margin as the manifest check, against the
+// other place a shutdown gets cut short.
+func TestDockerStopAgainstTheShutdownBudget(t *testing.T) {
+	for _, tc := range []struct {
+		name     string
+		script   string
+		want     Severity
+		contains string
+	}{
+		{
+			name:   "explicit and generous",
+			script: "sudo docker stop --timeout 30 \"$PREV\"\n",
+			want:   -1,
+		},
+		{
+			// --time is the deprecated spelling of the same flag and docker
+			// still honours it. A check that could not read it would report a
+			// deadline that exists as missing, and push whoever fixed that
+			// towards a flag that is on its way out.
+			name:   "the deprecated spelling still counts",
+			script: "docker stop --time 30 go-admin\n",
+			want:   -1,
+		},
+		{
+			name:   "the short form counts too",
+			script: "docker stop -t 30 go-admin\n",
+			want:   -1,
+		},
+		{
+			// docker's default is 10 and this process spends 8, so it happens
+			// to work today - and would stop working the first time anybody
+			// configures a drain window, without the command changing.
+			name:     "no deadline at all",
+			script:   "sudo docker stop \"$PREV\" >/dev/null\n",
+			want:     Error,
+			contains: "Pass --timeout 13",
+		},
+		{
+			name:     "shorter than the shutdown",
+			script:   "docker stop --timeout 5 go-admin\n",
+			want:     Error,
+			contains: "allows 5 seconds and this shutdown takes 8",
+		},
+		{
+			// Quoted back in the spelling that was written, so the message
+			// cannot misreport the line it is pointing at.
+			name:     "the message quotes the flag that was used",
+			script:   "docker stop -t 5 go-admin\n",
+			want:     Error,
+			contains: "`docker stop -t 5`",
+		},
+		{
+			name:   "longer than the shutdown but inside the margin",
+			script: "docker stop --timeout=10 go-admin\n",
+			want:   Warn,
+		},
+		{
+			name:   "exactly the margin",
+			script: "docker stop --timeout 13 go-admin\n",
+			want:   -1,
+		},
+		{
+			// The settings file describes `docker stop` in prose right beside
+			// the budget this check reads.
+			name:   "a commented-out command is not one that runs",
+			script: "# docker stop go-admin\n",
+			want:   -1,
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			root := fixture(t, map[string]string{
+				"config/extend.go":    hostConfigSource,
+				"config/settings.yml": factorySettings,
+				"scripts/deploy.sh":   "#!/bin/sh\n" + tc.script,
+			})
+			got := only(t, check(t, root, options{}), checkDockerStop)
+			if tc.want < 0 {
+				if len(got) != 0 {
+					t.Fatalf("reported %d findings, want none:\n%v", len(got), got)
+				}
+				return
+			}
+			if len(got) != 1 {
+				t.Fatalf("reported %d findings, want 1:\n%v", len(got), got)
+			}
+			if got[0].severity != tc.want {
+				t.Errorf("reported %s, want %s: %s", got[0].Severity, tc.want, got[0].Message)
+			}
+			if tc.contains != "" && !strings.Contains(got[0].Message, tc.contains) {
+				t.Errorf("message %q does not contain %q", got[0].Message, tc.contains)
+			}
+			if got[0].File != "scripts/deploy.sh" || got[0].Line != 2 {
+				t.Errorf("reported %s:%d, want scripts/deploy.sh:2", got[0].File, got[0].Line)
+			}
+		})
+	}
+}
+
+func composeWith(service string) string {
+	return "version: '3.8'\nservices:\n" + service
+}
+
+// The compose file is the other way this repository's container is stopped -
+// `make run` starts it that way - and it fails identically: the default is ten
+// seconds and it is nowhere near the budget it has to cover.
+func TestComposeStopGraceAgainstTheShutdownBudget(t *testing.T) {
+	for _, tc := range []struct {
+		name     string
+		service  string
+		want     Severity
+		contains string
+	}{
+		{
+			name:    "generous",
+			service: "  api:\n    image: go-admin:latest\n    stop_grace_period: 30s\n",
+			want:    -1,
+		},
+		{
+			name:     "not set at all",
+			service:  "  api:\n    image: go-admin:latest\n",
+			want:     Error,
+			contains: "Set stop_grace_period: 13s",
+		},
+		{
+			name:     "shorter than the shutdown",
+			service:  "  api:\n    image: go-admin:latest\n    stop_grace_period: 5s\n",
+			want:     Error,
+			contains: "stop_grace_period on service api allows 5 seconds",
+		},
+		{
+			name:    "longer than the shutdown but inside the margin",
+			service: "  api:\n    image: go-admin:latest\n    stop_grace_period: 10s\n",
+			want:    Warn,
+		},
+		{
+			// Compose takes hours and minutes as well as seconds, and a check
+			// that only read the digits would call 1m30s ninety times too
+			// short.
+			name:    "minutes and seconds",
+			service: "  api:\n    image: go-admin:latest\n    stop_grace_period: 1m30s\n",
+			want:    -1,
+		},
+		{
+			// A service running something else is not this process, and its
+			// grace period has nothing to do with this budget.
+			name:    "another image is not this application",
+			service: "  db:\n    image: mysql:8\n",
+			want:    -1,
+		},
+		{
+			// Built from this repository, so it is this application whatever
+			// the image ends up being called.
+			name:     "built here rather than named",
+			service:  "  api:\n    build: .\n",
+			want:     Error,
+			contains: "service api, which sets no stop_grace_period",
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			root := fixture(t, map[string]string{
+				"config/extend.go":    hostConfigSource,
+				"config/settings.yml": factorySettings,
+				"docker-compose.yml":  composeWith(tc.service),
+			})
+			got := only(t, check(t, root, options{}), checkDockerStop)
+			if tc.want < 0 {
+				if len(got) != 0 {
+					t.Fatalf("reported %d findings, want none:\n%v", len(got), got)
+				}
+				return
+			}
+			if len(got) != 1 {
+				t.Fatalf("reported %d findings, want 1:\n%v", len(got), got)
+			}
+			if got[0].severity != tc.want {
+				t.Errorf("reported %s, want %s: %s", got[0].Severity, tc.want, got[0].Message)
+			}
+			if tc.contains != "" && !strings.Contains(got[0].Message, tc.contains) {
+				t.Errorf("message %q does not contain %q", got[0].Message, tc.contains)
+			}
+			if got[0].File != "docker-compose.yml" {
+				t.Errorf("reported against %s, want docker-compose.yml", got[0].File)
+			}
+		})
+	}
+}
+
+func TestComposeDurations(t *testing.T) {
+	for _, tc := range []struct {
+		in     string
+		want   int
+		wantOK bool
+	}{
+		{in: "30s", want: 30, wantOK: true},
+		{in: "30", want: 30, wantOK: true},
+		{in: "1m30s", want: 90, wantOK: true},
+		{in: "2m", want: 120, wantOK: true},
+		{in: "1h", want: 3600, wantOK: true},
+		{in: "1h0m30s", want: 3630, wantOK: true},
+		{in: "", wantOK: false},
+		{in: "forever", wantOK: false},
+		{in: "500ms", wantOK: false},
+	} {
+		t.Run(tc.in, func(t *testing.T) {
+			got, ok := composeSeconds(tc.in)
+			if ok != tc.wantOK {
+				t.Fatalf("composeSeconds(%q) ok = %v, want %v", tc.in, ok, tc.wantOK)
+			}
+			if ok && got != tc.want {
+				t.Errorf("composeSeconds(%q) = %d, want %d", tc.in, got, tc.want)
+			}
+		})
+	}
+}
+
+// The command can be written in a workflow or in the Makefile as easily as in
+// a shell script, and a check that only looked at one of them would be quiet
+// about the others.
+func TestDockerStopIsFoundInEveryKindOfFile(t *testing.T) {
+	root := fixture(t, map[string]string{
+		"config/extend.go":           hostConfigSource,
+		"config/settings.yml":        factorySettings,
+		".github/workflows/ship.yml": "jobs:\n  deploy:\n    steps:\n      - run: docker stop app\n",
+		"Makefile":                   "stop:\n\tdocker stop app\n",
+		"scripts/deploy.sh":          "docker stop app\n",
+	})
+	got := only(t, check(t, root, options{}), checkDockerStop)
+	if len(got) != 3 {
+		t.Fatalf("found %d commands, want 3:\n%v", len(got), got)
+	}
+}
+
+func TestLineOfIgnoresComments(t *testing.T) {
+	content := []byte("a: 1\n  # terminationGracePeriodSeconds: 99\n  terminationGracePeriodSeconds: 30\n")
+	if got := lineOf(content, "terminationGracePeriodSeconds:"); got != 3 {
+		t.Errorf("lineOf = %d, want 3 - a commented-out key is not the setting", got)
+	}
+}

tools/checksilent/snapshot.go

@@ -38,6 +38,19 @@ type sourceFile struct {
 	consts  map[string]int64  // package-level integer constants, filled per package
 }
 
+// isTest reports whether this file is a _test.go.
+//
+// The checks about a seeded value - a menu sort, a config value, a menu id, a
+// soft-delete shape - are all about what reaches a real database through a
+// migration, and a test fixture reaches none. Worse, each of those guards
+// needs a test that writes the very value it rejects, so scanning test files
+// makes every such guard report its own test. The import and alias checks do
+// not skip tests: those are about the dependency graph, where a test file's
+// import is as real as any other.
+func (f *sourceFile) isTest() bool {
+	return strings.HasSuffix(f.Path, "_test.go")
+}
+
 // snapshot is every Go file under the root, parsed once and shared by all the
 // checks.
 type snapshot struct {