diff --git a/docs/api/admin.md b/docs/api/admin.md
index 8667033..cc467b9 100644
--- a/docs/api/admin.md
+++ b/docs/api/admin.md
@@ -33,6 +33,20 @@ Actor ID 与可信 SourceIP 会进入所有 mutation 命令，但认证材料不
 `controller/runtime` 将 Admin 与 Distribution 放在不同 `net.Listener`，任一
 监听器异常会触发同组端点的有界优雅停机。
 
+`admin.ApplicationService` 把 Handler DTO 映射到 `adminstate` 公用事务命令。
+Status 以一个权威管理快照决定 Upstream 集合和 Enabled 状态，只从注入的运行态
+读取器补充低基数计数、Worker 与已发布 Snapshot 版本。配置重载顺序固定为：
+
+1. `FileConfigurationLoader` 通过 `config.LoadResolved` 严格解析、解析 Secret 引用
+   并完成全量校验。
+2. 从脱敏管理投影计算版本与校验和；Secret 值及其可验证摘要不进入管理状态。
+3. 在同一 `adminstate` mutation 中提交配置修订、管理状态、审计和 Outbox。
+4. 提交成功后由 `config.Store` 一次原子指针交换发布完整运行配置；提交失败时旧
+   配置保持不变。幂等重放仍执行发布，以修复进程本地状态。
+
+主配置或 Secret 文件 I/O 故障归类为 503；语法、未知字段、引用和语义校验失败
+归类为 422。请求取消和截止时间保持原始上下文错误，不误报为配置错误。
+
 除契约中的 401/403/404/409/422 外，运行时还明确返回：
 
 - `400`：Request ID 或 JSON 无效。
diff --git a/docs/development/implementation-plan.md b/docs/development/implementation-plan.md
index 0963c65..475805c 100644
--- a/docs/development/implementation-plan.md
+++ b/docs/development/implementation-plan.md
@@ -184,7 +184,10 @@ Admin/Distribution 必需依赖。共享 `platform/httpserver` 与
 `controller/runtime` 已完成 Distribution/Admin 独立监听器、首错联动关闭和
 有界优雅停机。Admin mutation 已携带认证 Actor/SourceIP；公用 `adminstate`
 事务契约、MemoryStore、100 并发 Routing CAS、租约 Outbox 和六表管理 Schema
-已完成。生产命令入口、pgx Adapter 及 PostgreSQL 18 集成测试仍待实现。
+已完成。Admin `ApplicationService` 已将 mutation、权威管理快照、低基数运行态
+聚合与配置重载接到同一公用 seam；严格文件加载、脱敏管理摘要及原子配置发布
+已通过失败路径和并发测试。生产命令入口、pgx Adapter 及 PostgreSQL 18 集成
+测试仍待实现。
 
 已新增公用 `domain/activitypool` 契约及并发安全内存参考实现，Provider
 Reconciler 通过 `UpsertFetched` 写入带供应商 TTL 和分配安全余量的批次；已覆盖
diff --git a/docs/requirements/completion-audit.md b/docs/requirements/completion-audit.md
index 82c605b..18921e0 100644
--- a/docs/requirements/completion-audit.md
+++ b/docs/requirements/completion-audit.md
@@ -44,7 +44,9 @@
   运行同一公用契约。
 - `PostgreSQL 管理面基础`：已定义 `adminstate` 事务 seam、并发安全 MemoryStore、
   公用契约、100 并发 Routing CAS、租约 Outbox 和只含六张管理表的 Schema；
-  Admin Handler 已向 mutation 传播 Actor/SourceIP。
+  Admin Handler 已向 mutation 传播 Actor/SourceIP。Admin ApplicationService 已
+  完成管理 mutation 映射、权威/运行态 Status 聚合、严格配置加载和持久化成功后
+  的原子发布；边界测试禁止其依赖 Redis Extract 或 Proxy 明细包。
 
 ## 2. 已执行验证
 
diff --git a/docs/superpowers/plans/2026-07-29-postgresql-admin-state.md b/docs/superpowers/plans/2026-07-29-postgresql-admin-state.md
index 5ef50e6..5daff49 100644
--- a/docs/superpowers/plans/2026-07-29-postgresql-admin-state.md
+++ b/docs/superpowers/plans/2026-07-29-postgresql-admin-state.md
@@ -120,15 +120,15 @@ contract; Controller Admin maps its existing typed commands onto this seam.
 
 - [x] Change Admin protection to resolve `httpsecurity.Identity` once and add actor/source IP
   to mutation commands without exposing credentials.
-- [ ] Map typed Handler commands to `adminstate.Mutator`; map domain conflict/not-found/
+- [x] Map typed Handler commands to `adminstate.Mutator`; map domain conflict/not-found/
   invalid/unavailable errors to the existing HTTP contract.
-- [ ] Build Status from one adminstate Snapshot plus injected activity/worker aggregate readers.
-- [ ] Reload configuration with existing strict loader/validator, submit a secret-free management
+- [x] Build Status from one adminstate Snapshot plus injected activity/worker aggregate readers.
+- [x] Reload configuration with existing strict loader/validator, submit a secret-free management
   snapshot, then atomically publish runtime config only after persistence succeeds.
-- [ ] Test persistence failure leaves the current runtime config unchanged and Redis Extract is
+- [x] Test persistence failure leaves the current runtime config unchanged and Redis Extract is
   not referenced by the Admin module.
-- [ ] Run `go test -count=1 -timeout 60s ./internal/controller/admin/...`.
-- [ ] Commit with `feat: connect admin API to management state`.
+- [x] Run `go test -count=1 -timeout 60s ./internal/controller/admin/...`.
+- [x] Commit with `feat: connect admin API to management state`.
 
 ### Task 7: Documentation and Delivery Verification
 
diff --git a/docs/testing/test-strategy.md b/docs/testing/test-strategy.md
index 66c0947..3cd7743 100644
--- a/docs/testing/test-strategy.md
+++ b/docs/testing/test-strategy.md
@@ -93,6 +93,11 @@ PostgreSQL 管理面使用 `adminstate/contracttest` 作为 Memory/PostgreSQL 
 CAS、审计和租约 Outbox；Schema 静态测试证明只声明六张管理表。只有 pgx
 Adapter 在真实 PostgreSQL 18 上运行同一契约后，才标记生产持久化完成。
 
+Admin 应用层测试覆盖 typed-nil 依赖、Actor/SourceIP 映射、Routing CAS 错误、
+权威管理快照与低基数运行态聚合、未知字段拒绝、主配置/Secret 文件 I/O 分类、
+持久化失败不发布、幂等重放发布、脱敏管理摘要和原子配置 Store 并发读写。静态
+导入边界测试禁止 Admin 引用 Redis Activity/Extract 与 Proxy 明细包。
+
 需要 PostgreSQL/Redis 的测试使用独立实例和短生命周期容器，不复用开发数据。
 测试结束后验证没有残留 Worker ownership、Leader 租约、活动池条目或幂等键，
 并检查 PostgreSQL 中不存在 Proxy 明细和逐次提取记录。
diff --git a/internal/config/store.go b/internal/config/store.go
new file mode 100644
index 0000000..ca3a460
--- /dev/null
+++ b/internal/config/store.go
@@ -0,0 +1,43 @@
+package config
+
+import (
+	"errors"
+	"sync/atomic"
+)
+
+var ErrInvalidStore = errors.New("invalid configuration store")
+
+// Store publishes complete validated configurations with one atomic pointer swap.
+type Store struct {
+	current atomic.Pointer[Config]
+}
+
+func NewStore(initial *Config) (*Store, error) {
+	if err := Validate(initial); err != nil {
+		return nil, errors.Join(ErrInvalidStore, err)
+	}
+	store := &Store{}
+	store.Publish(initial)
+	return store, nil
+}
+
+func (store *Store) Current() *Config {
+	if store == nil {
+		return nil
+	}
+	current := store.current.Load()
+	if current == nil {
+		return nil
+	}
+	cloned := cloneConfig(*current)
+	return &cloned
+}
+
+// Publish accepts a non-nil configuration already validated by the caller.
+func (store *Store) Publish(configuration *Config) {
+	if store == nil || configuration == nil {
+		return
+	}
+	cloned := cloneConfig(*configuration)
+	store.current.Store(&cloned)
+}
diff --git a/internal/config/store_test.go b/internal/config/store_test.go
new file mode 100644
index 0000000..45eed28
--- /dev/null
+++ b/internal/config/store_test.go
@@ -0,0 +1,89 @@
+package config
+
+import (
+	"errors"
+	"sync"
+	"testing"
+)
+
+func TestStorePublishesAndReturnsDetachedConfigurations(t *testing.T) {
+	t.Parallel()
+	initial := storeTestConfig("provider-a")
+	store, err := NewStore(initial)
+	if err != nil {
+		t.Fatalf("NewStore() error = %v", err)
+	}
+
+	initial.Upstreams["provider-a"] = Upstream{}
+	current := store.Current()
+	if current == nil || !current.Upstreams["provider-a"].Enabled {
+		t.Fatalf("Current() was changed through constructor input: %+v", current)
+	}
+	current.Routing[0].Upstreams[0] = "mutated"
+	if got := store.Current().Routing[0].Upstreams[0]; got != "provider-a" {
+		t.Fatalf("Current() shared mutable state: %q", got)
+	}
+
+	next := storeTestConfig("provider-b")
+	store.Publish(next)
+	next.Routing[0].Upstreams[0] = "mutated"
+	if got := store.Current().Routing[0].Upstreams[0]; got != "provider-b" {
+		t.Fatalf("Publish() retained caller state: %q", got)
+	}
+}
+
+func TestStoreRejectsInvalidInitialConfiguration(t *testing.T) {
+	t.Parallel()
+	for _, configuration := range []*Config{nil, {}} {
+		if _, err := NewStore(configuration); !errors.Is(err, ErrInvalidStore) {
+			t.Fatalf("NewStore(%v) error = %v, want %v", configuration, err, ErrInvalidStore)
+		}
+	}
+}
+
+func TestStoreSupportsConcurrentReadersAndPublishers(t *testing.T) {
+	store, err := NewStore(storeTestConfig("provider-a"))
+	if err != nil {
+		t.Fatalf("NewStore() error = %v", err)
+	}
+	var wait sync.WaitGroup
+	for index := 0; index < 100; index++ {
+		wait.Add(2)
+		go func(index int) {
+			defer wait.Done()
+			name := "provider-a"
+			if index%2 == 1 {
+				name = "provider-b"
+			}
+			store.Publish(storeTestConfig(name))
+		}(index)
+		go func() {
+			defer wait.Done()
+			current := store.Current()
+			if current == nil || len(current.Routing) != 1 || len(current.Routing[0].Upstreams) != 1 {
+				t.Errorf("Current() returned partial configuration: %+v", current)
+			}
+		}()
+	}
+	wait.Wait()
+}
+
+func storeTestConfig(upstreamName string) *Config {
+	return &Config{
+		Version: 1,
+		Upstreams: map[string]Upstream{
+			upstreamName: {
+				Enabled: true, Exposure: []string{"gateway"},
+				API:       ProviderAPI{Auth: ProviderAuth{Type: "none"}},
+				ProxyAuth: ProxyAuth{Type: "response"},
+				Pool:      Pool{MaxSize: 10}, Capacity: Capacity{MaxConcurrencyPerProxy: 1},
+				Lifecycle: Lifecycle{TTL: Duration(60_000_000_000), AllocationSafetyMargin: Duration(10_000_000_000)},
+				Fetch:     Fetch{Timeout: Duration(1_000_000_000), MaxAttempts: 1, MaxInFlight: 1},
+			},
+		},
+		Routing: []Routing{{
+			Name: "default", Enabled: true, Purpose: "gateway", Upstreams: []string{upstreamName},
+			Strategy: Strategy{Type: "random"}, OnUnavailable: OnUnavailable{Action: "reject"},
+		}},
+	}
+}
diff --git a/internal/controller/admin/configuration.go b/internal/controller/admin/configuration.go
new file mode 100644
index 0000000..2cd7cf0
--- /dev/null
+++ b/internal/controller/admin/configuration.go
@@ -0,0 +1,84 @@
+package admin
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"reflect"
+	"strings"
+
+	"proxy-pool/internal/config"
+	"proxy-pool/internal/domain/adminstate"
+)
+
+var ErrInvalidConfigurationLoader = errors.New("invalid admin configuration loader")
+
+type FileConfigurationLoader struct {
+	path     string
+	resolver config.Resolver
+}
+
+func NewFileConfigurationLoader(path string, resolver config.Resolver) (*FileConfigurationLoader, error) {
+	if strings.TrimSpace(path) != path || path == "" || len(path) > adminstate.MaxSourceBytes || nilInterface(resolver) {
+		return nil, ErrInvalidConfigurationLoader
+	}
+	return &FileConfigurationLoader{path: path, resolver: resolver}, nil
+}
+
+func (loader *FileConfigurationLoader) LoadConfiguration(ctx context.Context) (LoadedConfiguration, error) {
+	if loader == nil || ctx == nil {
+		return LoadedConfiguration{}, ErrInvalidConfigurationLoader
+	}
+	if err := ctx.Err(); err != nil {
+		return LoadedConfiguration{}, err
+	}
+	content, err := loader.resolver.ReadFile(loader.path)
+	if err != nil {
+		return LoadedConfiguration{}, errors.Join(ErrUnavailable,
+			fmt.Errorf("read configuration %q: %w", loader.path, err))
+	}
+	if err := ctx.Err(); err != nil {
+		return LoadedConfiguration{}, err
+	}
+	resolver := &observedConfigurationResolver{Resolver: loader.resolver}
+	configuration, err := config.LoadResolved(bytes.NewReader(content), resolver)
+	if err != nil {
+		if resolver.readErr != nil {
+			return LoadedConfiguration{}, errors.Join(ErrUnavailable,
+				fmt.Errorf("load configuration %q: %w", loader.path, err))
+		}
+		return LoadedConfiguration{}, errors.Join(ErrInvalidConfiguration,
+			fmt.Errorf("load configuration %q: %w", loader.path, err))
+	}
+	if err := ctx.Err(); err != nil {
+		return LoadedConfiguration{}, err
+	}
+	return LoadedConfiguration{Value: configuration, Source: loader.path}, nil
+}
+
+type observedConfigurationResolver struct {
+	config.Resolver
+	readErr error
+}
+
+func (resolver *observedConfigurationResolver) ReadFile(path string) ([]byte, error) {
+	content, err := resolver.Resolver.ReadFile(path)
+	if err != nil {
+		resolver.readErr = err
+	}
+	return content, err
+}
+
+func nilInterface(value any) bool {
+	if value == nil {
+		return true
+	}
+	reflected := reflect.ValueOf(value)
+	switch reflected.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Pointer, reflect.Slice:
+		return reflected.IsNil()
+	default:
+		return false
+	}
+}
diff --git a/internal/controller/admin/configuration_test.go b/internal/controller/admin/configuration_test.go
new file mode 100644
index 0000000..e104e95
--- /dev/null
+++ b/internal/controller/admin/configuration_test.go
@@ -0,0 +1,156 @@
+package admin
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+)
+
+func TestFileConfigurationLoaderUsesStrictResolvedLoader(t *testing.T) {
+	t.Parallel()
+	configuration := strings.Replace(fileLoaderConfiguration, "proxyAuth: {type: response}",
+		"proxyAuth: {type: static, username: alice, passwordFile: /run/secrets/proxy}", 1)
+	resolver := &memoryConfigurationResolver{files: map[string][]byte{
+		"configs/proxy-pool.yaml": []byte(configuration),
+		"/run/secrets/proxy":      []byte("resolved-secret\r\n"),
+	}}
+	loader, err := NewFileConfigurationLoader("configs/proxy-pool.yaml", resolver)
+	if err != nil {
+		t.Fatalf("NewFileConfigurationLoader() error = %v", err)
+	}
+
+	loaded, err := loader.LoadConfiguration(context.Background())
+	if err != nil {
+		t.Fatalf("LoadConfiguration() error = %v", err)
+	}
+	if loaded.Source != "configs/proxy-pool.yaml" || loaded.Value == nil {
+		t.Fatalf("LoadConfiguration() = %+v", loaded)
+	}
+	auth := loaded.Value.Upstreams["provider-a"].ProxyAuth
+	if auth.Password != "resolved-secret" || auth.PasswordFile != "" {
+		t.Fatalf("resolved proxy auth = %+v", auth)
+	}
+}
+
+func TestFileConfigurationLoaderRejectsUnknownFields(t *testing.T) {
+	t.Parallel()
+	resolver := &memoryConfigurationResolver{files: map[string][]byte{
+		"config.yaml": []byte(fileLoaderConfiguration + "\nunknownRootField: true\n"),
+	}}
+	loader, err := NewFileConfigurationLoader("config.yaml", resolver)
+	if err != nil {
+		t.Fatalf("NewFileConfigurationLoader() error = %v", err)
+	}
+	if _, err := loader.LoadConfiguration(context.Background()); !errors.Is(err, ErrInvalidConfiguration) || !strings.Contains(err.Error(), "unknownRootField") {
+		t.Fatalf("LoadConfiguration() error = %v, want strict unknown field error", err)
+	}
+}
+
+func TestFileConfigurationLoaderClassifiesReadFailureAsUnavailable(t *testing.T) {
+	t.Parallel()
+	loader, err := NewFileConfigurationLoader("missing.yaml", &memoryConfigurationResolver{})
+	if err != nil {
+		t.Fatalf("NewFileConfigurationLoader() error = %v", err)
+	}
+	if _, err := loader.LoadConfiguration(context.Background()); !errors.Is(err, ErrUnavailable) {
+		t.Fatalf("LoadConfiguration() error = %v, want %v", err, ErrUnavailable)
+	}
+}
+
+func TestFileConfigurationLoaderClassifiesSecretReadFailureAsUnavailable(t *testing.T) {
+	t.Parallel()
+	configuration := strings.Replace(fileLoaderConfiguration, "proxyAuth: {type: response}",
+		"proxyAuth: {type: static, username: alice, passwordFile: /run/secrets/missing}", 1)
+	resolver := &memoryConfigurationResolver{files: map[string][]byte{
+		"config.yaml": []byte(configuration),
+	}}
+	loader, err := NewFileConfigurationLoader("config.yaml", resolver)
+	if err != nil {
+		t.Fatalf("NewFileConfigurationLoader() error = %v", err)
+	}
+	if _, err := loader.LoadConfiguration(context.Background()); !errors.Is(err, ErrUnavailable) || errors.Is(err, ErrInvalidConfiguration) {
+		t.Fatalf("LoadConfiguration() error = %v, want unavailable secret source", err)
+	}
+}
+
+func TestFileConfigurationLoaderHonorsCancellationBeforeIO(t *testing.T) {
+	t.Parallel()
+	resolver := &memoryConfigurationResolver{}
+	loader, err := NewFileConfigurationLoader("config.yaml", resolver)
+	if err != nil {
+		t.Fatalf("NewFileConfigurationLoader() error = %v", err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := loader.LoadConfiguration(ctx); !errors.Is(err, context.Canceled) {
+		t.Fatalf("LoadConfiguration() error = %v, want context cancellation", err)
+	}
+	if resolver.reads != 0 {
+		t.Fatalf("resolver reads = %d, want 0", resolver.reads)
+	}
+}
+
+func TestNewFileConfigurationLoaderRejectsInvalidDependencies(t *testing.T) {
+	t.Parallel()
+	resolver := &memoryConfigurationResolver{}
+	for _, test := range []struct {
+		path     string
+		resolver *memoryConfigurationResolver
+	}{
+		{resolver: resolver},
+		{path: "config.yaml"},
+	} {
+		if _, err := NewFileConfigurationLoader(test.path, test.resolver); !errors.Is(err, ErrInvalidConfigurationLoader) {
+			t.Fatalf("NewFileConfigurationLoader(%q) error = %v", test.path, err)
+		}
+	}
+}
+
+type memoryConfigurationResolver struct {
+	files map[string][]byte
+	reads int
+}
+
+func (*memoryConfigurationResolver) LookupEnv(string) (string, bool) { return "", false }
+
+func (resolver *memoryConfigurationResolver) ReadFile(path string) ([]byte, error) {
+	resolver.reads++
+	content, exists := resolver.files[path]
+	if !exists {
+		return nil, errors.New("fixture file not found")
+	}
+	return append([]byte(nil), content...), nil
+}
+
+const fileLoaderConfiguration = `
+version: 1
+security: {requireProtectionOnPublicListen: true}
+gateway:
+  enabled: true
+  listen: 127.0.0.1:8080
+  auth: {mode: none}
+  limits: {maxConcurrentConnections: 20000}
+  retry: {maxAttempts: 2, retryMethods: [GET, HEAD]}
+  destinationPolicy: {denyPrivateNetworks: true, denyLoopback: true, denyLinkLocal: true}
+routing:
+  - name: gateway
+    enabled: true
+    purpose: gateway
+    match: {hostRegex: '.*'}
+    upstreams: [provider-a]
+    strategy: {type: leastConnections}
+    onUnavailable: {action: reject}
+upstreams:
+  provider-a:
+    enabled: true
+    exposure: [gateway]
+    provider: {billingMode: subscription, protocols: [http, https]}
+    api: {url: https://provider-a.example/proxies, method: GET, auth: {type: none}, template: '{{.}}'}
+    proxyAuth: {type: response}
+    pool: {maxSize: 2000}
+    capacity: {maxConcurrencyPerProxy: 20}
+    lifecycle: {ttl: 5m, allocationSafetyMargin: 30s}
+    fetch: {requestInterval: 1s, timeout: 3s, maxAttempts: 3, maxInFlight: 1}
+    check: {interval: 30s, jitter: 20, maxInFlight: 100, timeout: 2s, maxAttempts: 2, maxConsecutiveFailures: 3}
+`
diff --git a/internal/controller/admin/service.go b/internal/controller/admin/service.go
new file mode 100644
index 0000000..fc9e2db
--- /dev/null
+++ b/internal/controller/admin/service.go
@@ -0,0 +1,281 @@
+package admin
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"sort"
+	"strings"
+	"time"
+
+	"proxy-pool/internal/config"
+	"proxy-pool/internal/domain/adminstate"
+)
+
+var ErrInvalidApplicationService = errors.New("invalid admin application service")
+
+type StateRepository interface {
+	adminstate.Mutator
+	adminstate.SnapshotReader
+}
+
+type OperationalStatusReader interface {
+	ReadOperationalStatus(context.Context) (OperationalStatus, error)
+}
+
+type ConfigurationLoader interface {
+	LoadConfiguration(context.Context) (LoadedConfiguration, error)
+}
+
+// ConfigurationPublisher must atomically publish an already validated configuration.
+type ConfigurationPublisher interface {
+	Publish(*config.Config)
+}
+
+var _ ConfigurationPublisher = (*config.Store)(nil)
+
+type ApplicationDependencies struct {
+	State         StateRepository
+	Operations    OperationalStatusReader
+	Configuration ConfigurationLoader
+	Publisher     ConfigurationPublisher
+}
+
+type ApplicationOptions struct {
+	Now func() time.Time
+}
+
+type OperationalStatus struct {
+	SnapshotVersion uint64
+	Upstreams       []UpstreamActivity
+	Workers         []WorkerStatus
+}
+
+type UpstreamActivity struct {
+	Name                  string
+	Available             int64
+	Checking              int64
+	Suspect               int64
+	Draining              int64
+	Extracted             int64
+	ConsecutiveEmptyFetch int64
+	FetchErrorCount       int64
+}
+
+type LoadedConfiguration struct {
+	Value  *config.Config
+	Source string
+}
+
+type ApplicationService struct {
+	state         StateRepository
+	operations    OperationalStatusReader
+	configuration ConfigurationLoader
+	publisher     ConfigurationPublisher
+	now           func() time.Time
+}
+
+var _ Service = (*ApplicationService)(nil)
+
+func NewApplicationService(dependencies ApplicationDependencies, options ApplicationOptions) (*ApplicationService, error) {
+	if nilInterface(dependencies.State) || nilInterface(dependencies.Operations) || nilInterface(dependencies.Configuration) ||
+		nilInterface(dependencies.Publisher) || options.Now == nil {
+		return nil, ErrInvalidApplicationService
+	}
+	return &ApplicationService{
+		state:         dependencies.State,
+		operations:    dependencies.Operations,
+		configuration: dependencies.Configuration,
+		publisher:     dependencies.Publisher,
+		now:           options.Now,
+	}, nil
+}
+
+func (service *ApplicationService) SetUpstreamEnabled(ctx context.Context, command SetUpstreamCommand) (MutationResult, error) {
+	result, err := service.state.SetUpstreamEnabled(ctx, adminstate.SetUpstreamCommand{
+		RequestID:  command.RequestID,
+		Actor:      adminstate.Actor{ID: command.ActorID, SourceIP: command.SourceIP},
+		OccurredAt: service.now().UTC(),
+		Name:       command.Name,
+		Enabled:    command.Enabled,
+	})
+	return mutationResult(result), mapAdminStateError(err)
+}
+
+func (service *ApplicationService) SwitchRouting(ctx context.Context, command SwitchCommand) (MutationResult, error) {
+	result, err := service.state.SwitchRouting(ctx, adminstate.SwitchRoutingCommand{
+		RequestID:       command.RequestID,
+		Actor:           adminstate.Actor{ID: command.ActorID, SourceIP: command.SourceIP},
+		OccurredAt:      service.now().UTC(),
+		Name:            command.Name,
+		ExpectedCurrent: command.ExpectedCurrent,
+		Target:          command.Target,
+		Reason:          command.Reason,
+	})
+	return mutationResult(result), mapAdminStateError(err)
+}
+
+func (service *ApplicationService) Status(ctx context.Context) (Status, error) {
+	snapshot, err := service.state.Snapshot(ctx)
+	if err != nil {
+		return Status{}, mapAdminStateError(err)
+	}
+	operations, err := service.operations.ReadOperationalStatus(ctx)
+	if err != nil {
+		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
+			return Status{}, err
+		}
+		return Status{}, errors.Join(ErrUnavailable, err)
+	}
+
+	activityByName := make(map[string]UpstreamActivity, len(operations.Upstreams))
+	for _, activity := range operations.Upstreams {
+		activityByName[activity.Name] = activity
+	}
+	status := Status{SnapshotVersion: operations.SnapshotVersion}
+	if snapshot.Config != nil {
+		status.ConfigVersion = snapshot.Config.ConfigVersion
+	}
+	status.Upstreams = make([]UpstreamStatus, 0, len(snapshot.Upstreams))
+	for _, authoritative := range snapshot.Upstreams {
+		activity := activityByName[authoritative.Name]
+		status.Upstreams = append(status.Upstreams, UpstreamStatus{
+			Name:                  authoritative.Name,
+			Enabled:               authoritative.Enabled,
+			Available:             activity.Available,
+			Checking:              activity.Checking,
+			Suspect:               activity.Suspect,
+			Draining:              activity.Draining,
+			Extracted:             activity.Extracted,
+			ConsecutiveEmptyFetch: activity.ConsecutiveEmptyFetch,
+			FetchErrorCount:       activity.FetchErrorCount,
+		})
+	}
+	sort.Slice(status.Upstreams, func(left, right int) bool {
+		return status.Upstreams[left].Name < status.Upstreams[right].Name
+	})
+	status.Workers = append([]WorkerStatus(nil), operations.Workers...)
+	sort.Slice(status.Workers, func(left, right int) bool {
+		if status.Workers[left].ID == status.Workers[right].ID {
+			return status.Workers[left].Zone < status.Workers[right].Zone
+		}
+		return status.Workers[left].ID < status.Workers[right].ID
+	})
+	return status, nil
+}
+
+func (service *ApplicationService) ReloadConfiguration(ctx context.Context, command ReloadCommand) (MutationResult, error) {
+	loaded, err := service.configuration.LoadConfiguration(ctx)
+	if err != nil {
+		switch {
+		case errors.Is(err, context.Canceled), errors.Is(err, context.DeadlineExceeded):
+			return MutationResult{RequestID: command.RequestID}, err
+		case errors.Is(err, ErrUnavailable), errors.Is(err, ErrInvalidConfiguration):
+			return MutationResult{RequestID: command.RequestID}, err
+		default:
+			return MutationResult{RequestID: command.RequestID}, errors.Join(ErrInvalidConfiguration, err)
+		}
+	}
+	if loaded.Value == nil || strings.TrimSpace(loaded.Source) != loaded.Source || loaded.Source == "" ||
+		len(loaded.Source) > adminstate.MaxSourceBytes {
+		return MutationResult{RequestID: command.RequestID}, ErrInvalidConfiguration
+	}
+	if err := config.Validate(loaded.Value); err != nil {
+		return MutationResult{RequestID: command.RequestID}, errors.Join(ErrInvalidConfiguration, err)
+	}
+
+	managementView := loaded.Value.Redacted()
+	encoded, err := json.Marshal(managementView)
+	if err != nil {
+		return MutationResult{RequestID: command.RequestID}, errors.Join(ErrInvalidConfiguration, err)
+	}
+	digest := sha256.Sum256(encoded)
+	checksum := hex.EncodeToString(digest[:])
+
+	current, err := service.state.Snapshot(ctx)
+	if err != nil {
+		return MutationResult{RequestID: command.RequestID}, mapAdminStateError(err)
+	}
+	upstreams, routings := managementDefinitions(loaded.Value, current)
+	result, err := service.state.CommitConfig(ctx, adminstate.CommitConfigCommand{
+		RequestID:     command.RequestID,
+		Actor:         adminstate.Actor{ID: command.ActorID, SourceIP: command.SourceIP},
+		OccurredAt:    service.now().UTC(),
+		ConfigVersion: "cfg-" + checksum,
+		Checksum:      checksum,
+		Source:        loaded.Source,
+		Upstreams:     upstreams,
+		Routings:      routings,
+	})
+	if err != nil {
+		return mutationResult(result), mapAdminStateError(err)
+	}
+	service.publisher.Publish(loaded.Value)
+	return mutationResult(result), nil
+}
+
+func managementDefinitions(configuration *config.Config, current adminstate.Snapshot) ([]adminstate.UpstreamDefinition, []adminstate.RoutingDefinition) {
+	upstreams := make([]adminstate.UpstreamDefinition, 0, len(configuration.Upstreams))
+	for name, upstream := range configuration.Upstreams {
+		upstreams = append(upstreams, adminstate.UpstreamDefinition{Name: name, Enabled: upstream.Enabled})
+	}
+	sort.Slice(upstreams, func(left, right int) bool { return upstreams[left].Name < upstreams[right].Name })
+
+	currentByName := make(map[string]string, len(current.Routings))
+	for _, routing := range current.Routings {
+		currentByName[routing.Name] = routing.CurrentUpstream
+	}
+	routings := make([]adminstate.RoutingDefinition, 0, len(configuration.Routing))
+	for _, routing := range configuration.Routing {
+		selected := ""
+		if existing := currentByName[routing.Name]; containsString(routing.Upstreams, existing) {
+			selected = existing
+		} else if len(routing.Upstreams) > 0 {
+			selected = routing.Upstreams[0]
+		}
+		routings = append(routings, adminstate.RoutingDefinition{
+			Name: routing.Name, Enabled: routing.Enabled,
+			Upstreams: append([]string(nil), routing.Upstreams...), CurrentUpstream: selected,
+		})
+	}
+	sort.Slice(routings, func(left, right int) bool { return routings[left].Name < routings[right].Name })
+	return upstreams, routings
+}
+
+func containsString(values []string, target string) bool {
+	for _, value := range values {
+		if value == target {
+			return true
+		}
+	}
+	return false
+}
+
+func mutationResult(result adminstate.MutationResult) MutationResult {
+	return MutationResult{
+		RequestID: result.RequestID,
+		Changed:   result.Changed,
+		Version:   result.Revision,
+		Message:   result.Message,
+	}
+}
+
+func mapAdminStateError(err error) error {
+	if err == nil {
+		return nil
+	}
+	switch {
+	case errors.Is(err, adminstate.ErrNotFound):
+		return errors.Join(ErrNotFound, err)
+	case errors.Is(err, adminstate.ErrConflict):
+		return errors.Join(ErrConflict, err)
+	case errors.Is(err, adminstate.ErrInvalidCommand):
+		return errors.Join(ErrInvalidConfiguration, err)
+	case errors.Is(err, adminstate.ErrUnavailable):
+		return errors.Join(ErrUnavailable, err)
+	default:
+		return err
+	}
+}
diff --git a/internal/controller/admin/service_boundary_test.go b/internal/controller/admin/service_boundary_test.go
new file mode 100644
index 0000000..520d503
--- /dev/null
+++ b/internal/controller/admin/service_boundary_test.go
@@ -0,0 +1,43 @@
+package admin
+
+import (
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestAdminApplicationHasNoProxyDetailOrRedisExtractionDependency(t *testing.T) {
+	t.Parallel()
+	packages, err := parser.ParseDir(token.NewFileSet(), ".", nil, parser.ImportsOnly)
+	if err != nil {
+		t.Fatalf("ParseDir(): %v", err)
+	}
+	for _, parsedPackage := range packages {
+		for filename, file := range parsedPackage.Files {
+			ast.Inspect(file, func(node ast.Node) bool {
+				importSpec, ok := node.(*ast.ImportSpec)
+				if !ok {
+					return true
+				}
+				path, err := strconv.Unquote(importSpec.Path.Value)
+				if err != nil {
+					t.Errorf("unquote import in %s: %v", filename, err)
+					return false
+				}
+				for _, forbidden := range []string{
+					"internal/adapters/redisactivity",
+					"internal/domain/activitypool",
+					"internal/domain/extraction",
+				} {
+					if strings.Contains(path, forbidden) {
+						t.Errorf("%s imports forbidden data-plane package %q", filename, path)
+					}
+				}
+				return false
+			})
+		}
+	}
+}
diff --git a/internal/controller/admin/service_test.go b/internal/controller/admin/service_test.go
new file mode 100644
index 0000000..ee4c092
--- /dev/null
+++ b/internal/controller/admin/service_test.go
@@ -0,0 +1,513 @@
+package admin
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"proxy-pool/internal/config"
+	"proxy-pool/internal/domain/adminstate"
+)
+
+func TestApplicationServiceMapsUpstreamMutationToAdminState(t *testing.T) {
+	t.Parallel()
+	now := time.Date(2026, 7, 29, 10, 0, 0, 0, time.UTC)
+	state := &recordingAdminState{
+		mutation: adminstate.MutationResult{
+			RequestID: "req-enable",
+			Changed:   true,
+			Revision:  12,
+			Message:   "enabled",
+		},
+	}
+	service, err := NewApplicationService(ApplicationDependencies{
+		State:         state,
+		Operations:    staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{},
+		Publisher:     &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: func() time.Time { return now }})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+
+	result, err := service.SetUpstreamEnabled(context.Background(), SetUpstreamCommand{
+		RequestID: "req-enable",
+		ActorID:   "admin:alice",
+		SourceIP:  "192.0.2.10",
+		Name:      "provider-a",
+		Enabled:   true,
+	})
+	if err != nil {
+		t.Fatalf("SetUpstreamEnabled() error = %v", err)
+	}
+	if result != (MutationResult{RequestID: "req-enable", Changed: true, Version: 12, Message: "enabled"}) {
+		t.Fatalf("SetUpstreamEnabled() result = %+v", result)
+	}
+	if state.lastUpstream != (adminstate.SetUpstreamCommand{
+		RequestID:  "req-enable",
+		Actor:      adminstate.Actor{ID: "admin:alice", SourceIP: "192.0.2.10"},
+		OccurredAt: now,
+		Name:       "provider-a",
+		Enabled:    true,
+	}) {
+		t.Fatalf("admin state command = %+v", state.lastUpstream)
+	}
+}
+
+func TestNewApplicationServiceRejectsMissingDependencies(t *testing.T) {
+	t.Parallel()
+	valid := ApplicationDependencies{
+		State:         &recordingAdminState{},
+		Operations:    staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{},
+		Publisher:     &recordingConfigurationPublisher{},
+	}
+	tests := []struct {
+		name         string
+		dependencies ApplicationDependencies
+		options      ApplicationOptions
+	}{
+		{name: "state", dependencies: func() ApplicationDependencies { value := valid; value.State = nil; return value }(), options: ApplicationOptions{Now: time.Now}},
+		{name: "operations", dependencies: func() ApplicationDependencies { value := valid; value.Operations = nil; return value }(), options: ApplicationOptions{Now: time.Now}},
+		{name: "configuration", dependencies: func() ApplicationDependencies { value := valid; value.Configuration = nil; return value }(), options: ApplicationOptions{Now: time.Now}},
+		{name: "publisher", dependencies: func() ApplicationDependencies { value := valid; value.Publisher = nil; return value }(), options: ApplicationOptions{Now: time.Now}},
+		{name: "clock", dependencies: valid},
+	}
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+			if _, err := NewApplicationService(test.dependencies, test.options); !errors.Is(err, ErrInvalidApplicationService) {
+				t.Fatalf("NewApplicationService() error = %v, want %v", err, ErrInvalidApplicationService)
+			}
+		})
+	}
+}
+
+func TestNewApplicationServiceRejectsTypedNilDependencies(t *testing.T) {
+	t.Parallel()
+	var state *recordingAdminState
+	var publisher *recordingConfigurationPublisher
+	valid := ApplicationDependencies{
+		State:         &recordingAdminState{},
+		Operations:    staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{},
+		Publisher:     &recordingConfigurationPublisher{},
+	}
+	for _, dependencies := range []ApplicationDependencies{
+		func() ApplicationDependencies { value := valid; value.State = state; return value }(),
+		func() ApplicationDependencies { value := valid; value.Publisher = publisher; return value }(),
+	} {
+		if _, err := NewApplicationService(dependencies, ApplicationOptions{Now: time.Now}); !errors.Is(err, ErrInvalidApplicationService) {
+			t.Fatalf("NewApplicationService(typed nil) error = %v, want %v", err, ErrInvalidApplicationService)
+		}
+	}
+}
+
+func TestApplicationServiceMapsRoutingSwitchAndDomainErrors(t *testing.T) {
+	t.Parallel()
+	now := time.Date(2026, 7, 29, 11, 0, 0, 0, time.FixedZone("test", 8*60*60))
+	state := &recordingAdminState{mutation: adminstate.MutationResult{RequestID: "req-switch", Changed: true, Revision: 21}}
+	service := mustApplicationService(t, state, ApplicationOptions{Now: func() time.Time { return now }})
+
+	result, err := service.SwitchRouting(context.Background(), SwitchCommand{
+		RequestID: "req-switch", ActorID: "admin:bob", SourceIP: "198.51.100.7",
+		Name: "checkout", ExpectedCurrent: "provider-a", Target: "provider-b", Reason: "capacity",
+	})
+	if err != nil {
+		t.Fatalf("SwitchRouting() error = %v", err)
+	}
+	if result.Version != 21 || !result.Changed {
+		t.Fatalf("SwitchRouting() result = %+v", result)
+	}
+	wantCommand := adminstate.SwitchRoutingCommand{
+		RequestID: "req-switch", Actor: adminstate.Actor{ID: "admin:bob", SourceIP: "198.51.100.7"},
+		OccurredAt: now.UTC(), Name: "checkout", ExpectedCurrent: "provider-a", Target: "provider-b", Reason: "capacity",
+	}
+	if state.lastSwitch != wantCommand {
+		t.Fatalf("admin state command = %+v, want %+v", state.lastSwitch, wantCommand)
+	}
+
+	tests := []struct {
+		domain error
+		want   error
+	}{
+		{domain: adminstate.ErrNotFound, want: ErrNotFound},
+		{domain: adminstate.ErrConflict, want: ErrConflict},
+		{domain: adminstate.ErrInvalidCommand, want: ErrInvalidConfiguration},
+		{domain: adminstate.ErrUnavailable, want: ErrUnavailable},
+	}
+	for _, test := range tests {
+		state.err = test.domain
+		_, err := service.SwitchRouting(context.Background(), SwitchCommand{
+			RequestID: "req-switch", ActorID: "admin:bob", SourceIP: "198.51.100.7",
+			Name: "checkout", ExpectedCurrent: "provider-a", Target: "provider-b",
+		})
+		if !errors.Is(err, test.want) || !errors.Is(err, test.domain) {
+			t.Fatalf("SwitchRouting(%v) error = %v, want mapped %v preserving cause", test.domain, err, test.want)
+		}
+	}
+}
+
+func TestApplicationServiceBuildsStatusFromAuthoritativeAndOperationalSnapshots(t *testing.T) {
+	t.Parallel()
+	state := &recordingAdminState{snapshot: adminstate.Snapshot{
+		Revision: 31,
+		Config:   &adminstate.ConfigRevision{Revision: 31, ConfigVersion: "cfg-31"},
+		Upstreams: []adminstate.UpstreamState{
+			{Name: "provider-b", Enabled: false, Revision: 31},
+			{Name: "provider-a", Enabled: true, Revision: 31},
+		},
+	}}
+	operations := staticOperationalStatusReader{status: OperationalStatus{
+		SnapshotVersion: 88,
+		Upstreams: []UpstreamActivity{
+			{Name: "provider-a", Available: 10, Checking: 2, Suspect: 1, ConsecutiveEmptyFetch: 3},
+			{Name: "unknown", Available: 999},
+		},
+		Workers: []WorkerStatus{
+			{ID: "worker-b", Zone: "zone-b", Connected: false, SnapshotVersion: 87, StaleSeconds: 4},
+			{ID: "worker-a", Zone: "zone-a", Connected: true, SnapshotVersion: 88},
+		},
+	}}
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: state, Operations: operations, Configuration: staticConfigurationLoader{},
+		Publisher: &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+
+	status, err := service.Status(context.Background())
+	if err != nil {
+		t.Fatalf("Status() error = %v", err)
+	}
+	if status.ConfigVersion != "cfg-31" || status.SnapshotVersion != 88 {
+		t.Fatalf("Status() versions = (%q, %d)", status.ConfigVersion, status.SnapshotVersion)
+	}
+	if len(status.Upstreams) != 2 || status.Upstreams[0].Name != "provider-a" || !status.Upstreams[0].Enabled ||
+		status.Upstreams[0].Available != 10 || status.Upstreams[0].Checking != 2 ||
+		status.Upstreams[0].ConsecutiveEmptyFetch != 3 {
+		t.Fatalf("Status() upstreams = %+v", status.Upstreams)
+	}
+	if status.Upstreams[1].Name != "provider-b" || status.Upstreams[1].Enabled || status.Upstreams[1].Available != 0 {
+		t.Fatalf("Status() disabled upstream = %+v", status.Upstreams[1])
+	}
+	if len(status.Workers) != 2 || status.Workers[0].ID != "worker-a" || status.Workers[1].ID != "worker-b" {
+		t.Fatalf("Status() workers = %+v", status.Workers)
+	}
+}
+
+func TestApplicationServiceMapsStatusDependencyFailures(t *testing.T) {
+	t.Parallel()
+	stateFailure := errors.Join(adminstate.ErrUnavailable, errors.New("postgres down"))
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: &recordingAdminState{err: stateFailure}, Operations: staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{}, Publisher: &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	if _, err := service.Status(context.Background()); !errors.Is(err, ErrUnavailable) || !errors.Is(err, stateFailure) {
+		t.Fatalf("Status(state failure) error = %v", err)
+	}
+
+	operationsFailure := errors.New("redis aggregate unavailable")
+	service, err = NewApplicationService(ApplicationDependencies{
+		State: &recordingAdminState{}, Operations: staticOperationalStatusReader{err: operationsFailure},
+		Configuration: staticConfigurationLoader{}, Publisher: &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	if _, err := service.Status(context.Background()); !errors.Is(err, ErrUnavailable) || !errors.Is(err, operationsFailure) {
+		t.Fatalf("Status(operations failure) error = %v", err)
+	}
+
+	service, err = NewApplicationService(ApplicationDependencies{
+		State: &recordingAdminState{}, Operations: staticOperationalStatusReader{err: context.Canceled},
+		Configuration: staticConfigurationLoader{}, Publisher: &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	if _, err := service.Status(context.Background()); !errors.Is(err, context.Canceled) || errors.Is(err, ErrUnavailable) {
+		t.Fatalf("Status(cancellation) error = %v, want unclassified cancellation", err)
+	}
+}
+
+func TestApplicationServiceReloadPersistsManagementViewBeforePublishing(t *testing.T) {
+	t.Parallel()
+	now := time.Date(2026, 7, 29, 12, 0, 0, 0, time.UTC)
+	configuration := validReloadConfiguration()
+	publisher := &recordingConfigurationPublisher{}
+	state := &recordingAdminState{
+		mutation: adminstate.MutationResult{RequestID: "req-reload", Changed: true, Revision: 42},
+		snapshot: adminstate.Snapshot{Routings: []adminstate.RoutingState{
+			{Name: "checkout", Enabled: true, Upstreams: []string{"provider-a", "provider-b"}, CurrentUpstream: "provider-b"},
+		}},
+	}
+	state.onCommit = func(adminstate.CommitConfigCommand) {
+		if len(publisher.published) != 0 {
+			t.Fatal("configuration was published before management state committed")
+		}
+	}
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: state, Operations: staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{loaded: LoadedConfiguration{
+			Value: configuration, Source: "configs/proxy-pool.yaml",
+		}},
+		Publisher: publisher,
+	}, ApplicationOptions{Now: func() time.Time { return now }})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+
+	result, err := service.ReloadConfiguration(context.Background(), ReloadCommand{
+		RequestID: "req-reload", ActorID: "admin:alice", SourceIP: "192.0.2.10",
+	})
+	if err != nil {
+		t.Fatalf("ReloadConfiguration() error = %v", err)
+	}
+	if result.Version != 42 || !result.Changed {
+		t.Fatalf("ReloadConfiguration() result = %+v", result)
+	}
+	if len(publisher.published) != 1 || publisher.published[0] != configuration {
+		t.Fatalf("published configurations = %+v", publisher.published)
+	}
+	command := state.lastConfig
+	if command.RequestID != "req-reload" || command.Actor != (adminstate.Actor{ID: "admin:alice", SourceIP: "192.0.2.10"}) ||
+		!command.OccurredAt.Equal(now) || command.Source != "configs/proxy-pool.yaml" {
+		t.Fatalf("CommitConfig() metadata = %+v", command)
+	}
+	if len(command.Checksum) != adminstate.SHA256HexBytes || command.ConfigVersion != "cfg-"+command.Checksum {
+		t.Fatalf("CommitConfig() version/checksum = (%q, %q)", command.ConfigVersion, command.Checksum)
+	}
+	if len(command.Upstreams) != 2 || command.Upstreams[0].Name != "provider-a" || command.Upstreams[1].Name != "provider-b" {
+		t.Fatalf("CommitConfig() upstreams = %+v", command.Upstreams)
+	}
+	if len(command.Routings) != 2 || command.Routings[0].Name != "checkout" || command.Routings[0].CurrentUpstream != "provider-b" ||
+		command.Routings[1].Name != "new-route" || command.Routings[1].CurrentUpstream != "provider-b" {
+		t.Fatalf("CommitConfig() routings = %+v", command.Routings)
+	}
+}
+
+func TestApplicationServiceReloadDoesNotPublishInvalidOrUncommittedConfiguration(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		name       string
+		loaded     LoadedConfiguration
+		stateError error
+		wantCause  error
+	}{
+		{
+			name: "invalid configuration", loaded: LoadedConfiguration{Value: &config.Config{}, Source: "invalid.yaml"},
+			wantCause: ErrInvalidConfiguration,
+		},
+		{
+			name: "persistence unavailable", loaded: LoadedConfiguration{Value: validReloadConfiguration(), Source: "valid.yaml"},
+			stateError: adminstate.ErrUnavailable, wantCause: ErrUnavailable,
+		},
+	}
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+			publisher := &recordingConfigurationPublisher{}
+			state := &recordingAdminState{err: test.stateError}
+			service, err := NewApplicationService(ApplicationDependencies{
+				State: state, Operations: staticOperationalStatusReader{},
+				Configuration: staticConfigurationLoader{loaded: test.loaded}, Publisher: publisher,
+			}, ApplicationOptions{Now: time.Now})
+			if err != nil {
+				t.Fatalf("NewApplicationService() error = %v", err)
+			}
+			_, err = service.ReloadConfiguration(context.Background(), ReloadCommand{
+				RequestID: "req-reload", ActorID: "admin:alice", SourceIP: "192.0.2.10",
+			})
+			if !errors.Is(err, test.wantCause) {
+				t.Fatalf("ReloadConfiguration() error = %v, want %v", err, test.wantCause)
+			}
+			if len(publisher.published) != 0 {
+				t.Fatalf("published %d configurations after failure", len(publisher.published))
+			}
+		})
+	}
+}
+
+func TestApplicationServiceReloadPublishesSuccessfulReplay(t *testing.T) {
+	t.Parallel()
+	publisher := &recordingConfigurationPublisher{}
+	state := &recordingAdminState{mutation: adminstate.MutationResult{RequestID: "req-replay", Revision: 7}}
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: state, Operations: staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{loaded: LoadedConfiguration{
+			Value: validReloadConfiguration(), Source: "config.yaml",
+		}}, Publisher: publisher,
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	result, err := service.ReloadConfiguration(context.Background(), ReloadCommand{
+		RequestID: "req-replay", ActorID: "admin:alice", SourceIP: "192.0.2.10",
+	})
+	if err != nil || result.Changed || result.Version != 7 || len(publisher.published) != 1 {
+		t.Fatalf("ReloadConfiguration() = %+v, %v; publishes=%d", result, err, len(publisher.published))
+	}
+}
+
+func TestApplicationServiceReloadPreservesCancellation(t *testing.T) {
+	t.Parallel()
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: &recordingAdminState{}, Operations: staticOperationalStatusReader{},
+		Configuration: staticConfigurationLoader{err: context.Canceled},
+		Publisher:     &recordingConfigurationPublisher{},
+	}, ApplicationOptions{Now: time.Now})
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	_, err = service.ReloadConfiguration(context.Background(), ReloadCommand{RequestID: "req-cancel"})
+	if !errors.Is(err, context.Canceled) || errors.Is(err, ErrInvalidConfiguration) {
+		t.Fatalf("ReloadConfiguration() error = %v, want unclassified cancellation", err)
+	}
+}
+
+func TestApplicationServiceUsesSecretFreeManagementChecksum(t *testing.T) {
+	t.Parallel()
+	state := &recordingAdminState{}
+	publisher := &recordingConfigurationPublisher{}
+	var commands []adminstate.CommitConfigCommand
+	state.onCommit = func(command adminstate.CommitConfigCommand) {
+		commands = append(commands, command)
+	}
+	for _, secret := range []string{"secret-a", "secret-b"} {
+		configuration := validReloadConfiguration()
+		upstream := configuration.Upstreams["provider-a"]
+		upstream.ProxyAuth.Password = secret
+		configuration.Upstreams["provider-a"] = upstream
+		service, err := NewApplicationService(ApplicationDependencies{
+			State: state, Operations: staticOperationalStatusReader{},
+			Configuration: staticConfigurationLoader{loaded: LoadedConfiguration{
+				Value: configuration, Source: "config.yaml",
+			}}, Publisher: publisher,
+		}, ApplicationOptions{Now: time.Now})
+		if err != nil {
+			t.Fatalf("NewApplicationService() error = %v", err)
+		}
+		if _, err := service.ReloadConfiguration(context.Background(), ReloadCommand{
+			RequestID: "req-secret", ActorID: "admin:alice", SourceIP: "192.0.2.10",
+		}); err != nil {
+			t.Fatalf("ReloadConfiguration() error = %v", err)
+		}
+	}
+	if len(commands) != 2 || commands[0].Checksum != commands[1].Checksum || commands[0].ConfigVersion != commands[1].ConfigVersion {
+		t.Fatalf("secret rotation changed public management digest: %+v", commands)
+	}
+	if len(publisher.published) != 2 || publisher.published[1].Upstreams["provider-a"].ProxyAuth.Password != "secret-b" {
+		t.Fatalf("secret rotation was not published: %+v", publisher.published)
+	}
+}
+
+func validReloadConfiguration() *config.Config {
+	return &config.Config{
+		Version: 1,
+		Upstreams: map[string]config.Upstream{
+			"provider-b": validReloadUpstream("secret-b"),
+			"provider-a": validReloadUpstream("secret-a"),
+		},
+		Routing: []config.Routing{
+			{
+				Name: "new-route", Enabled: true, Purpose: "gateway",
+				Upstreams: []string{"provider-b", "provider-a"}, Strategy: config.Strategy{Type: "random"},
+				OnUnavailable: config.OnUnavailable{Action: "reject"},
+			},
+			{
+				Name: "checkout", Enabled: true, Purpose: "gateway",
+				Upstreams: []string{"provider-a", "provider-b"}, Strategy: config.Strategy{Type: "sequential", SwitchAfterEmptyFetch: 5},
+				OnUnavailable: config.OnUnavailable{Action: "reject"},
+			},
+		},
+	}
+}
+
+func validReloadUpstream(secret string) config.Upstream {
+	return config.Upstream{
+		Enabled: true, Exposure: []string{"gateway"},
+		API:       config.ProviderAPI{Auth: config.ProviderAuth{Type: "none"}},
+		ProxyAuth: config.ProxyAuth{Type: "static", Username: "user", Password: secret},
+		Pool:      config.Pool{MaxSize: 10}, Capacity: config.Capacity{MaxConcurrencyPerProxy: 2},
+		Lifecycle: config.Lifecycle{TTL: config.Duration(time.Minute), AllocationSafetyMargin: config.Duration(10 * time.Second)},
+		Fetch:     config.Fetch{Timeout: config.Duration(time.Second), MaxAttempts: 2, MaxInFlight: 1},
+	}
+}
+
+func mustApplicationService(t *testing.T, state StateRepository, options ApplicationOptions) *ApplicationService {
+	t.Helper()
+	service, err := NewApplicationService(ApplicationDependencies{
+		State: state, Operations: staticOperationalStatusReader{}, Configuration: staticConfigurationLoader{},
+		Publisher: &recordingConfigurationPublisher{},
+	}, options)
+	if err != nil {
+		t.Fatalf("NewApplicationService() error = %v", err)
+	}
+	return service
+}
+
+type recordingAdminState struct {
+	mutation     adminstate.MutationResult
+	err          error
+	snapshot     adminstate.Snapshot
+	lastUpstream adminstate.SetUpstreamCommand
+	lastSwitch   adminstate.SwitchRoutingCommand
+	lastConfig   adminstate.CommitConfigCommand
+	onCommit     func(adminstate.CommitConfigCommand)
+}
+
+func (state *recordingAdminState) SetUpstreamEnabled(_ context.Context, command adminstate.SetUpstreamCommand) (adminstate.MutationResult, error) {
+	state.lastUpstream = command
+	return state.mutation, state.err
+}
+
+func (state *recordingAdminState) SwitchRouting(_ context.Context, command adminstate.SwitchRoutingCommand) (adminstate.MutationResult, error) {
+	state.lastSwitch = command
+	return state.mutation, state.err
+}
+
+func (state *recordingAdminState) CommitConfig(_ context.Context, command adminstate.CommitConfigCommand) (adminstate.MutationResult, error) {
+	state.lastConfig = command
+	if state.onCommit != nil {
+		state.onCommit(command)
+	}
+	return state.mutation, state.err
+}
+
+func (state *recordingAdminState) Snapshot(context.Context) (adminstate.Snapshot, error) {
+	return state.snapshot, state.err
+}
+
+type staticOperationalStatusReader struct {
+	status OperationalStatus
+	err    error
+}
+
+func (reader staticOperationalStatusReader) ReadOperationalStatus(context.Context) (OperationalStatus, error) {
+	return reader.status, reader.err
+}
+
+type staticConfigurationLoader struct {
+	loaded LoadedConfiguration
+	err    error
+}
+
+func (loader staticConfigurationLoader) LoadConfiguration(context.Context) (LoadedConfiguration, error) {
+	return loader.loaded, loader.err
+}
+
+type recordingConfigurationPublisher struct {
+	published []*config.Config
+}
+
+func (publisher *recordingConfigurationPublisher) Publish(configuration *config.Config) {
+	publisher.published = append(publisher.published, configuration)
+}
diff --git a/progress.md b/progress.md
index 6e07e86..052f496 100644
--- a/progress.md
+++ b/progress.md
@@ -28,6 +28,12 @@
   PostgreSQL 18 契约仍待实现。
 - Admin Handler 现在复用 `httpsecurity.Identity`，把 Actor ID 与可信 SourceIP
   传给 enable/disable/switch/reload mutation，供持久化审计直接使用。
+- 已实现 Admin `ApplicationService`：mutation 统一映射到 `adminstate`；Status 合并
+  一个权威管理快照和低基数运行态聚合；配置重载严格执行解析/校验、脱敏摘要、
+  持久化、原子发布顺序，任何持久化失败都不会替换旧运行配置。
+- 已新增公用原子 `config.Store` 与标准 `FileConfigurationLoader`；覆盖 100 组
+  并发读写、typed-nil、未知字段、主配置/Secret 文件 I/O、取消、Secret 轮换和
+  Admin 禁止依赖 Redis Extract/Proxy 明细的架构边界。
 - 本轮 `.\scripts\verify.ps1`、`.\scripts\test-redis.ps1`、Compose 静态展开和
   Compose 非持久化策略测试通过；Windows `CGO_ENABLED=0`，race 继续由 Linux
   CI 执行。
diff --git a/task_plan.md b/task_plan.md
index 0b1fc5f..55fb277 100644
--- a/task_plan.md
+++ b/task_plan.md
@@ -29,7 +29,8 @@
 10. [已完成] 实现生产 Redis Activity Adapter、原子 Lua、公用行为契约和
     Redis 8.2 集成 fixture；本地 Redis 禁止短效代理数据持久化
 11. [进行中] 实现 PostgreSQL 管理面；ADR、领域事务契约、MemoryStore、公用
-    契约、六表 Schema 和 Admin Actor 传播已完成，pgx Adapter/集成测试待完成
+    契约、六表 Schema、Admin Actor 传播、应用服务和原子配置发布已完成，pgx
+    Adapter/集成测试待完成
 
 ## 串并行关系