diff --git a/docs/architecture/settings-integration-configuration-model.md b/docs/architecture/settings-integration-configuration-model.md
index eb6b2db7..1226c4e4 100644
--- a/docs/architecture/settings-integration-configuration-model.md
+++ b/docs/architecture/settings-integration-configuration-model.md
@@ -1,50 +1,84 @@
 # Settings Integration Configuration Model
 
-This document records the logical model behind the Settings -> Integrations page.
+This document records the current logical model behind Settings -> Integrations,
+with the provider catalog aligned to the bridge-only design.
 
-The page is organized into three layers:
+## Current Rule
 
-- User login state
-- Base connection configuration
-- Advanced custom mode
+- Settings only manages bridge connection parameters and upstream sync
+  definitions.
+- The provider picker is not derived from local endpoint presets.
+- `xworkmate-bridge` is the only source of truth for the provider catalog.
 
-The base connection layer is the default configuration surface. It represents the connection identity that can come from either `svc.plus` or a self-hosted service. Advanced custom mode does not replace the base layer; it overrides selected defaults on top of it.
+## Bridge-Only Provider Source Of Truth
 
 ```mermaid
 flowchart TD
-  A[Settings Integrations Page] --> B[User Login State]
-  A --> C[Base Connection Configuration]
-  A --> D[Advanced Custom Mode]
+  A["Settings UI
+  仅管理 Bridge 连接参数
+  与自定义 upstream sync 定义"] --> B["SettingsSnapshot.externalAcpEndpoints
+  仅作为 sync 输入"]
 
-  B --> B1[Signed out]
-  B --> B2[Signed in]
-  B --> B3[MFA pending]
-  B --> B4[Signing in]
+  B --> C["buildExternalAcpSyncedProvidersInternal()"]
+  C --> D["syncExternalAcpProvidersInternal()"]
+  D --> E["xworkmate.providers.sync"]
+  E --> F["xworkmate-bridge providerCatalog"]
 
-  C --> C1[Account / Email]
-  C --> C2[Password]
-  C --> C3[Service URL]
-  C --> C4[User]
-  C --> C5[Sync]
-  C --> C6[Default connection source]
-  C6 --> C7[svc.plus provided]
-  C6 --> C8[Self-hosted]
+  F --> G["acp.capabilities"]
+  G --> H["providers[]
+  singleAgent / multiAgent"]
 
-  D --> D1[Override OpenClaw Gateway]
-  D --> D2[Override Vault Server]
-  D --> D3[Override LLM Endpoint]
-  D --> D4[Override External ACP Server endpoint]
-  D --> D5[Override SKILLS directories]
+  H --> I["refreshSingleAgentCapabilitiesRuntimeInternal()"]
+  I --> J["bridgeAdvertisedProvidersInternal
+  App 内唯一 provider 名单源"]
+  I --> K["singleAgentCapabilitiesByProviderInternal
+  App 内唯一 provider 可用性源"]
 
-  B2 --> C
-  C --> D
-  D --> E[Final effective configuration]
+  G --> L["refreshAcpCapabilitiesRuntimeInternal()"]
+  L --> M["GatewayAcpCapabilities
+  providers / singleAgent / multiAgent"]
+  M --> N["mergeAcpCapabilitiesIntoMountTargetsRuntimeInternal()"]
+  N --> O["ManagedMountTargetState
+  codex / opencode / claude / gemini / aris / openclaw
+  available / discoveryState"]
+
+  J --> P["configuredSingleAgentProviders
+  = bridgeAdvertisedProvidersInternal"]
+  P --> Q["singleAgentProviderOptions
+  Composer / Thread Picker 唯一数据源"]
+
+  K --> R["availableSingleAgentProviders
+  = bridge 当前可用 provider"]
+  R --> S["visibleAssistantExecutionTargets(...)
+  single-agent 是否显示
+  只看 runtime available providers"]
+
+  O --> T["visible gateway / multi-agent execution affordances
+  openclaw / aris discovery 只看 bridge capabilities"]
+
+  Q --> U["setSingleAgentProvider(providerId)
+  仅写入 thread executionBinding.providerId"]
+
+  U --> V["singleAgentProviderForSession()
+  恢复线程已选 providerId"]
+
+  V --> W["sendSingleAgentMessageDesktopGoTaskFlowInternal()"]
+  W --> X["再次拉取 acp.capabilities"]
+  X --> Y["按本次 bridge providers 解析
+  auto -> 当前 bridge 顺序第一个可用 provider
+  explicit -> 当前 bridge 已广告的 provider"]
+
+  Y --> Z{"provider resolved?"}
+  Z -->|"yes"| AA["executeTask(... provider ...)"]
+  Z -->|"no"| AB["provider unavailable UX"]
 ```
 
 ## Notes
 
-- User login state describes authentication only.
-- Base connection configuration describes the default connection path and identity.
-- Advanced custom mode is a layered override mechanism.
-- The effective runtime configuration is computed from the base layer plus any advanced overrides.
-
+- `externalAcpEndpoints` still matters, but only as bridge sync input.
+- Provider visibility, picker contents, and auto-provider resolution all come
+  from `acp.capabilities.providers`.
+- `openclaw` and other mount-target discovery states are also bridge-owned and
+  come from ACP capabilities merged into `ManagedMountTargetState`.
+- Persisted thread `providerId` restores the user's previous selection, but it
+  does not repopulate the provider catalog.
diff --git a/docs/architecture/task-control-plane-unification.md b/docs/architecture/task-control-plane-unification.md
index 6949d7a8..1da4f2db 100644
--- a/docs/architecture/task-control-plane-unification.md
+++ b/docs/architecture/task-control-plane-unification.md
@@ -44,6 +44,72 @@ flowchart TD
     Q --> R["UI stream render"]
 ```
 
+## Provider 真源
+
+Single-agent provider catalog and availability are owned by
+`xworkmate-bridge`, not by local endpoint presets inside the app.
+
+```mermaid
+flowchart TD
+  A["Settings UI
+  仅管理 Bridge 连接参数
+  与自定义 upstream sync 定义"] --> B["SettingsSnapshot.externalAcpEndpoints
+  仅作为 sync 输入"]
+
+  B --> C["buildExternalAcpSyncedProvidersInternal()"]
+  C --> D["syncExternalAcpProvidersInternal()"]
+  D --> E["xworkmate.providers.sync"]
+  E --> F["xworkmate-bridge providerCatalog"]
+
+  F --> G["acp.capabilities"]
+  G --> H["providers[]
+  singleAgent / multiAgent"]
+
+  H --> I["refreshSingleAgentCapabilitiesRuntimeInternal()"]
+  I --> J["bridgeAdvertisedProvidersInternal
+  App 内唯一 provider 名单源"]
+  I --> K["singleAgentCapabilitiesByProviderInternal
+  App 内唯一 provider 可用性源"]
+
+  G --> L["refreshAcpCapabilitiesRuntimeInternal()"]
+  L --> M["GatewayAcpCapabilities
+  providers / singleAgent / multiAgent"]
+  M --> N["mergeAcpCapabilitiesIntoMountTargetsRuntimeInternal()"]
+  N --> O["ManagedMountTargetState
+  codex / opencode / claude / gemini / aris / openclaw
+  available / discoveryState"]
+
+  J --> P["configuredSingleAgentProviders
+  = bridgeAdvertisedProvidersInternal"]
+  P --> Q["singleAgentProviderOptions
+  Composer / Thread Picker 唯一数据源"]
+
+  K --> R["availableSingleAgentProviders
+  = bridge 当前可用 provider"]
+  R --> S["visibleAssistantExecutionTargets(...)
+  single-agent 是否显示
+  只看 runtime available providers"]
+
+  O --> T["visible gateway / multi-agent execution affordances
+  openclaw / aris discovery 只看 bridge capabilities"]
+
+  Q --> U["setSingleAgentProvider(providerId)
+  仅写入 thread executionBinding.providerId"]
+
+  U --> V["singleAgentProviderForSession()
+  恢复线程已选 providerId"]
+
+  V --> W["sendSingleAgentMessageDesktopGoTaskFlowInternal()"]
+  W --> X["再次拉取 acp.capabilities"]
+  X --> Y["按本次 bridge providers 解析
+  auto -> 当前 bridge 顺序第一个可用 provider
+  explicit -> 当前 bridge 已广告的 provider"]
+
+  Y --> Z{"provider resolved?"}
+  Z -->|"yes"| AA["executeTask(... provider ...)"]
+  Z -->|"no"| AB["provider unavailable UX"]
+```
+
 ## 端侧桥接规则
 
 ### Desktop App