feat(acp): add _goose/unstable/session/extensions/apply method (#11081)

Signed-off-by: Matt Toohey <contact@matttoohey.com>

ui/sdk/src/generated/client.gen.ts

@@ -11,6 +11,7 @@ import type { Client } from "@agentclientprotocol/sdk";
 import type {
   AddConfigExtensionRequest_unstable,
   AddSessionExtensionRequest_unstable,
+  ApplySessionExtensionsRequest_unstable,
   AppsDeleteRequest_unstable,
   AppsDeleteResponse_unstable,
   AppsExportRequest_unstable,
@@ -297,6 +298,15 @@ export class GooseExtClient {
     );
   }
 
+  async sessionExtensionsApply_unstable(
+    params: ApplySessionExtensionsRequest_unstable,
+  ): Promise<void> {
+    await this.conn.extMethod(
+      "_goose/unstable/session/extensions/apply",
+      params,
+    );
+  }
+
   async toolsList_unstable(
     params: GetToolsRequest_unstable,
   ): Promise<GetToolsResponse_unstable> {

ui/sdk/src/generated/types.gen.ts

@@ -254,6 +254,24 @@ export type RemoveSessionExtensionRequest_unstable = {
     name: string;
 };
 
+/**
+ * Recreate the session's provider, keeping its current provider and model,
+ * so that the session's current extension list takes effect.
+ *
+ * Useful after adding or removing session extensions when the provider
+ * forwards extensions to a downstream session (ACP harness providers such as
+ * claude-acp and codex-acp). Those providers snapshot the extension list when
+ * they are built, so extension changes only reach them on rebuild: the
+ * provider is replaced with a new instance whose downstream session is
+ * created with the updated extension list.
+ *
+ * Providers that don't forward extensions pick up extension changes
+ * immediately; for them this call is not required.
+ */
+export type ApplySessionExtensionsRequest_unstable = {
+    sessionId: string;
+};
+
 /**
  * List all tools available in a session.
  */
@@ -2637,7 +2655,7 @@ export type RecipeParamsAction = 'submit' | 'cancel';
 export type ExtRequest = {
     id: string;
     method: string;
-    params?: AddSessionExtensionRequest_unstable | RemoveSessionExtensionRequest_unstable | GetToolsRequest_unstable | SetToolPermissionsRequest_unstable | GooseToolCallRequest_unstable | ReadResourceRequest_unstable | AppsListRequest_unstable | AppsExportRequest_unstable | AppsImportRequest_unstable | AppsDeleteRequest_unstable | UpdateWorkingDirRequest_unstable | SetSessionSystemPromptRequest_unstable | SteerSessionRequest_unstable | DiagnosticsGetRequest_unstable | ListPromptsRequest_unstable | GetPromptRequest_unstable | SavePromptRequest_unstable | ResetPromptRequest_unstable | DeleteSessionRequest | GetConfigExtensionsRequest_unstable | GetAvailableExtensionsRequest_unstable | AddConfigExtensionRequest_unstable | RemoveConfigExtensionRequest_unstable | SetConfigExtensionEnabledRequest_unstable | GetSessionExtensionsRequest_unstable | ListProvidersRequest_unstable | ProviderSupportedModelsListRequest_unstable | ProviderCatalogListRequest_unstable | ProviderSetupCatalogListRequest_unstable | ProviderCatalogTemplateRequest_unstable | CustomProviderCreateRequest_unstable | CustomProviderReadRequest_unstable | CustomProviderUpdateRequest_unstable | CustomProviderDeleteRequest_unstable | RefreshProviderInventoryRequest_unstable | ProviderConfigReadRequest_unstable | ProviderConfigStatusRequest_unstable | ProviderConfigSaveRequest_unstable | ProviderConfigDeleteRequest_unstable | ProviderConfigAuthenticateRequest_unstable | ProviderSecretsListRequest_unstable | ProviderSecretDeleteRequest_unstable | CanonicalModelInfoRequest_unstable | PreferencesReadRequest_unstable | PreferencesSaveRequest_unstable | PreferencesRemoveRequest_unstable | ConfigReadRequest_unstable | ConfigUpsertRequest_unstable | ConfigRemoveRequest_unstable | ConfigReadAllRequest_unstable | DefaultsReadRequest_unstable | DefaultsSaveRequest_unstable | DefaultsClearRequest_unstable | OnboardingImportScanRequest_unstable | OnboardingImportApplyRequest_unstable | ExportSessionRequest_unstable | ImportSessionRequest_unstable | ShareSessionNostrRequest_unstable | EncodeRecipeRequest_unstable | DecodeRecipeRequest_unstable | ScanRecipeRequest_unstable | ListRecipesRequest_unstable | DeleteRecipeRequest_unstable | ScheduleRecipeRequest_unstable | SetRecipeSlashCommandRequest_unstable | SaveRecipeRequest_unstable | ParseRecipeRequest_unstable | RecipeToYamlRequest_unstable | ListSchedulesRequest_unstable | ListScheduleSessionsRequest_unstable | CreateScheduleRequest_unstable | DeleteScheduleRequest_unstable | PauseScheduleRequest_unstable | UnpauseScheduleRequest_unstable | UpdateScheduleRequest_unstable | RunScheduleNowRequest_unstable | KillRunningJobRequest_unstable | InspectRunningJobRequest_unstable | GetSessionInfoRequest_unstable | TruncateSessionConversationRequest_unstable | UpdateSessionProjectRequest_unstable | RenameSessionRequest_unstable | ArchiveSessionRequest_unstable | UnarchiveSessionRequest_unstable | CreateSourceRequest_unstable | ListSourcesRequest_unstable | ListAgentMentionsRequest_unstable | ListSlashCommandsRequest_unstable | UpdateSourceRequest_unstable | DeleteSourceRequest_unstable | ExportSourceRequest_unstable | ImportSourcesRequest_unstable | DictationTranscribeRequest_unstable | DictationConfigRequest_unstable | DictationSecretSaveRequest_unstable | DictationSecretDeleteRequest_unstable | DictationModelsListRequest_unstable | DictationModelDownloadRequest_unstable | DictationModelDownloadProgressRequest_unstable | DictationModelCancelRequest_unstable | DictationModelDeleteRequest_unstable | DictationModelSelectRequest_unstable | LocalInferenceModelsListRequest_unstable | LocalInferenceModelDownloadRequest_unstable | LocalInferenceModelDownloadProgressRequest_unstable | LocalInferenceModelDownloadCancelRequest_unstable | LocalInferenceModelDeleteRequest_unstable | LocalInferenceModelEvictRequest_unstable | LocalInferenceModelSettingsReadRequest_unstable | LocalInferenceModelSettingsUpdateRequest_unstable | LocalInferenceHuggingFaceSearchRequest_unstable | LocalInferenceHuggingFaceRepoVariantsRequest_unstable | LocalInferenceBuiltinChatTemplatesListRequest_unstable | {
+    params?: AddSessionExtensionRequest_unstable | RemoveSessionExtensionRequest_unstable | ApplySessionExtensionsRequest_unstable | GetToolsRequest_unstable | SetToolPermissionsRequest_unstable | GooseToolCallRequest_unstable | ReadResourceRequest_unstable | AppsListRequest_unstable | AppsExportRequest_unstable | AppsImportRequest_unstable | AppsDeleteRequest_unstable | UpdateWorkingDirRequest_unstable | SetSessionSystemPromptRequest_unstable | SteerSessionRequest_unstable | DiagnosticsGetRequest_unstable | ListPromptsRequest_unstable | GetPromptRequest_unstable | SavePromptRequest_unstable | ResetPromptRequest_unstable | DeleteSessionRequest | GetConfigExtensionsRequest_unstable | GetAvailableExtensionsRequest_unstable | AddConfigExtensionRequest_unstable | RemoveConfigExtensionRequest_unstable | SetConfigExtensionEnabledRequest_unstable | GetSessionExtensionsRequest_unstable | ListProvidersRequest_unstable | ProviderSupportedModelsListRequest_unstable | ProviderCatalogListRequest_unstable | ProviderSetupCatalogListRequest_unstable | ProviderCatalogTemplateRequest_unstable | CustomProviderCreateRequest_unstable | CustomProviderReadRequest_unstable | CustomProviderUpdateRequest_unstable | CustomProviderDeleteRequest_unstable | RefreshProviderInventoryRequest_unstable | ProviderConfigReadRequest_unstable | ProviderConfigStatusRequest_unstable | ProviderConfigSaveRequest_unstable | ProviderConfigDeleteRequest_unstable | ProviderConfigAuthenticateRequest_unstable | ProviderSecretsListRequest_unstable | ProviderSecretDeleteRequest_unstable | CanonicalModelInfoRequest_unstable | PreferencesReadRequest_unstable | PreferencesSaveRequest_unstable | PreferencesRemoveRequest_unstable | ConfigReadRequest_unstable | ConfigUpsertRequest_unstable | ConfigRemoveRequest_unstable | ConfigReadAllRequest_unstable | DefaultsReadRequest_unstable | DefaultsSaveRequest_unstable | DefaultsClearRequest_unstable | OnboardingImportScanRequest_unstable | OnboardingImportApplyRequest_unstable | ExportSessionRequest_unstable | ImportSessionRequest_unstable | ShareSessionNostrRequest_unstable | EncodeRecipeRequest_unstable | DecodeRecipeRequest_unstable | ScanRecipeRequest_unstable | ListRecipesRequest_unstable | DeleteRecipeRequest_unstable | ScheduleRecipeRequest_unstable | SetRecipeSlashCommandRequest_unstable | SaveRecipeRequest_unstable | ParseRecipeRequest_unstable | RecipeToYamlRequest_unstable | ListSchedulesRequest_unstable | ListScheduleSessionsRequest_unstable | CreateScheduleRequest_unstable | DeleteScheduleRequest_unstable | PauseScheduleRequest_unstable | UnpauseScheduleRequest_unstable | UpdateScheduleRequest_unstable | RunScheduleNowRequest_unstable | KillRunningJobRequest_unstable | InspectRunningJobRequest_unstable | GetSessionInfoRequest_unstable | TruncateSessionConversationRequest_unstable | UpdateSessionProjectRequest_unstable | RenameSessionRequest_unstable | ArchiveSessionRequest_unstable | UnarchiveSessionRequest_unstable | CreateSourceRequest_unstable | ListSourcesRequest_unstable | ListAgentMentionsRequest_unstable | ListSlashCommandsRequest_unstable | UpdateSourceRequest_unstable | DeleteSourceRequest_unstable | ExportSourceRequest_unstable | ImportSourcesRequest_unstable | DictationTranscribeRequest_unstable | DictationConfigRequest_unstable | DictationSecretSaveRequest_unstable | DictationSecretDeleteRequest_unstable | DictationModelsListRequest_unstable | DictationModelDownloadRequest_unstable | DictationModelDownloadProgressRequest_unstable | DictationModelCancelRequest_unstable | DictationModelDeleteRequest_unstable | DictationModelSelectRequest_unstable | LocalInferenceModelsListRequest_unstable | LocalInferenceModelDownloadRequest_unstable | LocalInferenceModelDownloadProgressRequest_unstable | LocalInferenceModelDownloadCancelRequest_unstable | LocalInferenceModelDeleteRequest_unstable | LocalInferenceModelEvictRequest_unstable | LocalInferenceModelSettingsReadRequest_unstable | LocalInferenceModelSettingsUpdateRequest_unstable | LocalInferenceHuggingFaceSearchRequest_unstable | LocalInferenceHuggingFaceRepoVariantsRequest_unstable | LocalInferenceBuiltinChatTemplatesListRequest_unstable | {
         [key: string]: unknown;
     } | null;
 };

ui/sdk/src/generated/zod.gen.ts

@@ -208,6 +208,24 @@ export const zRemoveSessionExtensionRequest_unstable = z.object({
     name: z.string()
 });
 
+/**
+ * Recreate the session's provider, keeping its current provider and model,
+ * so that the session's current extension list takes effect.
+ *
+ * Useful after adding or removing session extensions when the provider
+ * forwards extensions to a downstream session (ACP harness providers such as
+ * claude-acp and codex-acp). Those providers snapshot the extension list when
+ * they are built, so extension changes only reach them on rebuild: the
+ * provider is replaced with a new instance whose downstream session is
+ * created with the updated extension list.
+ *
+ * Providers that don't forward extensions pick up extension changes
+ * immediately; for them this call is not required.
+ */
+export const zApplySessionExtensionsRequest_unstable = z.object({
+    sessionId: z.string()
+});
+
 /**
  * List all tools available in a session.
  */
@@ -2832,6 +2850,7 @@ export const zExtRequest = z.object({
         z.union([
             zAddSessionExtensionRequest_unstable,
             zRemoveSessionExtensionRequest_unstable,
+            zApplySessionExtensionsRequest_unstable,
             zGetToolsRequest_unstable,
             zSetToolPermissionsRequest_unstable,
             zGooseToolCallRequest_unstable,