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{ type AssistantMessage, type ImageContent, type Model, streamSimple, type UserMessage } from \"@draht/ai\";\nimport { runAgentLoop } from \"../agent-loop.ts\";\nimport type {\n\tAgentContext,\n\tAgentEvent,\n\tAgentLoopConfig,\n\tAgentMessage,\n\tAgentTool,\n\tQueueMode,\n\tStreamFn,\n\tThinkingLevel,\n} from \"../types.ts\";\nimport { collectEntriesForBranchSummary, generateBranchSummary } from \"./compaction/branch-summarization.ts\";\nimport { compact, DEFAULT_COMPACTION_SETTINGS, prepareCompaction } from \"./compaction/compaction.ts\";\nimport { convertToLlm } from \"./messages.ts\";\nimport { formatPromptTemplateInvocation } from \"./prompt-templates.ts\";\nimport { formatSkillInvocation } from \"./skills.ts\";\nimport type {\n\tAbortResult,\n\tAgentHarnessEvent,\n\tAgentHarnessEventResultMap,\n\tAgentHarnessOptions,\n\tAgentHarnessOwnEvent,\n\tAgentHarnessPhase,\n\tAgentHarnessResources,\n\tAgentHarnessStreamOptions,\n\tAgentHarnessStreamOptionsPatch,\n\tExecutionEnv,\n\tNavigateTreeResult,\n\tPendingSessionWrite,\n\tPromptTemplate,\n\tSession,\n\tSkill,\n} from \"./types.ts\";\nimport { AgentHarnessError, BranchSummaryError, CompactionError, SessionError, toError } from \"./types.ts\";\n\nfunction createUserMessage(text: string, images?: ImageContent[]): UserMessage {\n\tconst content: Array<{ type: \"text\"; text: string } | ImageContent> = [{ type: \"text\", text }];\n\tif (images) content.push(...images);\n\treturn { role: \"user\", content, timestamp: Date.now() };\n}\n\nfunction createFailureMessage(model: Model<any>, error: unknown, aborted: boolean): AssistantMessage {\n\treturn {\n\t\trole: \"assistant\",\n\t\tcontent: [{ type: \"text\", text: \"\" }],\n\t\tapi: model.api,\n\t\tprovider: model.provider,\n\t\tmodel: model.id,\n\t\tstopReason: aborted ? \"aborted\" : \"error\",\n\t\terrorMessage: error instanceof Error ? error.message : String(error),\n\t\ttimestamp: Date.now(),\n\t\tusage: {\n\t\t\tinput: 0,\n\t\t\toutput: 0,\n\t\t\tcacheRead: 0,\n\t\t\tcacheWrite: 0,\n\t\t\ttotalTokens: 0,\n\t\t\tcost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },\n\t\t},\n\t};\n}\n\nfunction cloneStreamOptions(streamOptions?: AgentHarnessStreamOptions): AgentHarnessStreamOptions {\n\treturn {\n\t\t...streamOptions,\n\t\theaders: streamOptions?.headers ? { ...streamOptions.headers } : undefined,\n\t\tmetadata: streamOptions?.metadata ? { ...streamOptions.metadata } : undefined,\n\t};\n}\n\nfunction mergeHeaders(...headers: Array<Record<string, string> | undefined>): Record<string, string> | undefined {\n\tconst merged: Record<string, string> = {};\n\tlet hasHeaders = false;\n\tfor (const entry of headers) {\n\t\tif (!entry) continue;\n\t\tObject.assign(merged, entry);\n\t\thasHeaders = true;\n\t}\n\treturn hasHeaders ? merged : undefined;\n}\n\nfunction findDuplicateNames(names: string[]): string[] {\n\tconst seen = new Set<string>();\n\tconst duplicates = new Set<string>();\n\tfor (const name of names) {\n\t\tif (seen.has(name)) duplicates.add(name);\n\t\tseen.add(name);\n\t}\n\treturn [...duplicates];\n}\n\nfunction applyStreamOptionsPatch(\n\tbase: AgentHarnessStreamOptions,\n\tpatch?: AgentHarnessStreamOptionsPatch,\n): AgentHarnessStreamOptions {\n\tconst result = cloneStreamOptions(base);\n\tif (!patch) return result;\n\n\tif (Object.hasOwn(patch, \"transport\")) result.transport = patch.transport;\n\tif (Object.hasOwn(patch, \"timeoutMs\")) result.timeoutMs = patch.timeoutMs;\n\tif (Object.hasOwn(patch, \"maxRetries\")) result.maxRetries = patch.maxRetries;\n\tif (Object.hasOwn(patch, \"maxRetryDelayMs\")) result.maxRetryDelayMs = patch.maxRetryDelayMs;\n\tif (Object.hasOwn(patch, \"cacheRetention\")) result.cacheRetention = patch.cacheRetention;\n\n\tif (Object.hasOwn(patch, \"headers\")) {\n\t\tif (patch.headers === undefined) {\n\t\t\tresult.headers = undefined;\n\t\t} else {\n\t\t\tconst headers = { ...(result.headers ?? {}) };\n\t\t\tfor (const [key, value] of Object.entries(patch.headers)) {\n\t\t\t\tif (value === undefined) delete headers[key];\n\t\t\t\telse headers[key] = value;\n\t\t\t}\n\t\t\tresult.headers = Object.keys(headers).length > 0 ? headers : undefined;\n\t\t}\n\t}\n\n\tif (Object.hasOwn(patch, \"metadata\")) {\n\t\tif (patch.metadata === undefined) {\n\t\t\tresult.metadata = undefined;\n\t\t} else {\n\t\t\tconst metadata = { ...(result.metadata ?? {}) };\n\t\t\tfor (const [key, value] of Object.entries(patch.metadata)) {\n\t\t\t\tif (value === undefined) delete metadata[key];\n\t\t\t\telse metadata[key] = value;\n\t\t\t}\n\t\t\tresult.metadata = Object.keys(metadata).length > 0 ? metadata : undefined;\n\t\t}\n\t}\n\n\treturn result;\n}\n\nconst SUBSCRIBER_EVENT_TYPE = \"*\";\n\ntype AgentHarnessHandler = (event: any, signal?: AbortSignal) => Promise<any> | any;\n\nfunction normalizeHarnessError(error: unknown, fallbackCode: AgentHarnessError[\"code\"]): AgentHarnessError {\n\tif (error instanceof AgentHarnessError) return error;\n\tconst cause = toError(error);\n\tif (cause instanceof SessionError) return new AgentHarnessError(\"session\", cause.message, cause);\n\tif (cause instanceof CompactionError) return new AgentHarnessError(\"compaction\", cause.message, cause);\n\tif (cause instanceof BranchSummaryError) return new AgentHarnessError(\"branch_summary\", cause.message, cause);\n\treturn new AgentHarnessError(fallbackCode, cause.message, cause);\n}\n\nfunction normalizeHookError(error: unknown): AgentHarnessError {\n\treturn normalizeHarnessError(error, \"hook\");\n}\n\ninterface AgentHarnessTurnState<\n\tTSkill extends Skill = Skill,\n\tTPromptTemplate extends PromptTemplate = PromptTemplate,\n\tTTool extends AgentTool = AgentTool,\n> {\n\tmessages: AgentMessage[];\n\tresources: AgentHarnessResources<TSkill, TPromptTemplate>;\n\tstreamOptions: AgentHarnessStreamOptions;\n\tsessionId: string;\n\tsystemPrompt: string;\n\tmodel: Model<any>;\n\tthinkingLevel: ThinkingLevel;\n\ttools: TTool[];\n\tactiveTools: TTool[];\n}\n\nexport class AgentHarness<\n\tTSkill extends Skill = Skill,\n\tTPromptTemplate extends PromptTemplate = PromptTemplate,\n\tTTool extends AgentTool = AgentTool,\n> {\n\treadonly env: ExecutionEnv;\n\tprivate session: Session;\n\tprivate phase: AgentHarnessPhase = \"idle\";\n\tprivate runAbortController?: AbortController;\n\tprivate runPromise?: Promise<void>;\n\tprivate pendingSessionWrites: PendingSessionWrite[] = [];\n\tprivate model: Model<any>;\n\tprivate thinkingLevel: ThinkingLevel;\n\tprivate systemPrompt: AgentHarnessOptions<TSkill, TPromptTemplate, TTool>[\"systemPrompt\"];\n\tprivate streamOptions: AgentHarnessStreamOptions;\n\tprivate getApiKeyAndHeaders?: AgentHarnessOptions[\"getApiKeyAndHeaders\"];\n\tprivate resources: AgentHarnessResources<TSkill, TPromptTemplate>;\n\tprivate tools = new Map<string, TTool>();\n\tprivate activeToolNames: string[];\n\tprivate steerQueue: UserMessage[] = [];\n\tprivate steeringQueueMode: QueueMode;\n\tprivate followUpQueue: UserMessage[] = [];\n\tprivate followUpQueueMode: QueueMode;\n\tprivate nextTurnQueue: AgentMessage[] = [];\n\tprivate handlers = new Map<string, Set<AgentHarnessHandler>>();\n\n\tconstructor(options: AgentHarnessOptions<TSkill, TPromptTemplate, TTool>) {\n\t\tthis.env = options.env;\n\t\tthis.session = options.session;\n\t\tthis.resources = options.resources ?? {};\n\t\tthis.streamOptions = cloneStreamOptions(options.streamOptions);\n\t\tthis.systemPrompt = options.systemPrompt;\n\t\tthis.getApiKeyAndHeaders = options.getApiKeyAndHeaders;\n\t\tthis.validateUniqueNames(\n\t\t\t(options.tools ?? []).map((tool) => tool.name),\n\t\t\t\"Duplicate tool name(s)\",\n\t\t);\n\t\tfor (const tool of options.tools ?? []) {\n\t\t\tthis.tools.set(tool.name, tool);\n\t\t}\n\t\tthis.model = options.model;\n\t\tthis.thinkingLevel = options.thinkingLevel ?? \"off\";\n\t\tthis.activeToolNames = options.activeToolNames\n\t\t\t? [...options.activeToolNames]\n\t\t\t: (options.tools ?? []).map((tool) => tool.name);\n\t\tthis.validateUniqueNames(this.activeToolNames, \"Duplicate active tool name(s)\");\n\t\tthis.validateToolNames(this.activeToolNames);\n\t\tthis.steeringQueueMode = options.steeringMode ?? \"one-at-a-time\";\n\t\tthis.followUpQueueMode = options.followUpMode ?? \"one-at-a-time\";\n\t}\n\n\tprivate getHandlers(type: string): Set<AgentHarnessHandler> | undefined {\n\t\treturn this.handlers.get(type);\n\t}\n\n\tprivate async emitOwn(event: AgentHarnessOwnEvent<TSkill, TPromptTemplate>, signal?: AbortSignal): Promise<void> {\n\t\tfor (const listener of this.getHandlers(SUBSCRIBER_EVENT_TYPE) ?? []) {\n\t\t\ttry {\n\t\t\t\tawait listener(event, signal);\n\t\t\t} catch (error) {\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t}\n\t}\n\n\tprivate async emitAny(event: AgentHarnessEvent<TSkill, TPromptTemplate>, signal?: AbortSignal): Promise<void> {\n\t\tfor (const listener of this.getHandlers(SUBSCRIBER_EVENT_TYPE) ?? []) {\n\t\t\ttry {\n\t\t\t\tawait listener(event, signal);\n\t\t\t} catch (error) {\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t}\n\t}\n\n\tprivate async emitHook<TType extends keyof AgentHarnessEventResultMap>(\n\t\tevent: Extract<AgentHarnessOwnEvent, { type: TType }>,\n\t): Promise<AgentHarnessEventResultMap[TType] | undefined> {\n\t\tconst handlers = this.getHandlers(event.type as TType);\n\t\tif (!handlers || handlers.size === 0) return undefined;\n\t\tlet lastResult: AgentHarnessEventResultMap[TType] | undefined;\n\t\tfor (const handler of handlers) {\n\t\t\ttry {\n\t\t\t\tconst result = await handler(event);\n\t\t\t\tif (result !== undefined) {\n\t\t\t\t\tlastResult = result;\n\t\t\t\t}\n\t\t\t} catch (error) {\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t}\n\t\treturn lastResult;\n\t}\n\n\tprivate async emitBeforeProviderRequest(\n\t\tmodel: Model<any>,\n\t\tsessionId: string,\n\t\tstreamOptions: AgentHarnessStreamOptions,\n\t): Promise<AgentHarnessStreamOptions> {\n\t\tconst handlers = this.getHandlers(\"before_provider_request\");\n\t\tlet current = cloneStreamOptions(streamOptions);\n\t\tif (!handlers || handlers.size === 0) return current;\n\t\tfor (const handler of handlers) {\n\t\t\ttry {\n\t\t\t\tconst result = await handler({\n\t\t\t\t\ttype: \"before_provider_request\",\n\t\t\t\t\tmodel,\n\t\t\t\t\tsessionId,\n\t\t\t\t\tstreamOptions: cloneStreamOptions(current),\n\t\t\t\t});\n\t\t\t\tif (result?.streamOptions) {\n\t\t\t\t\tcurrent = applyStreamOptionsPatch(current, result.streamOptions);\n\t\t\t\t}\n\t\t\t} catch (error) {\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t}\n\t\treturn current;\n\t}\n\n\tprivate async emitBeforeProviderPayload(model: Model<any>, payload: unknown): Promise<unknown> {\n\t\tconst handlers = this.getHandlers(\"before_provider_payload\");\n\t\tlet current = payload;\n\t\tif (!handlers || handlers.size === 0) return current;\n\t\tfor (const handler of handlers) {\n\t\t\ttry {\n\t\t\t\tconst result = await handler({ type: \"before_provider_payload\", model, payload: current });\n\t\t\t\tif (result !== undefined) {\n\t\t\t\t\tcurrent = result.payload;\n\t\t\t\t}\n\t\t\t} catch (error) {\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t}\n\t\treturn current;\n\t}\n\n\tprivate async emitQueueUpdate(): Promise<void> {\n\t\tawait this.emitOwn({\n\t\t\ttype: \"queue_update\",\n\t\t\tsteer: [...this.steerQueue],\n\t\t\tfollowUp: [...this.followUpQueue],\n\t\t\tnextTurn: [...this.nextTurnQueue],\n\t\t});\n\t}\n\n\tprivate startRunPromise(): () => void {\n\t\tlet finish = () => {};\n\t\tthis.runPromise = new Promise<void>((resolve) => {\n\t\t\tfinish = resolve;\n\t\t});\n\t\treturn () => {\n\t\t\tthis.runPromise = undefined;\n\t\t\tfinish();\n\t\t};\n\t}\n\n\tprivate async createTurnState(): Promise<AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>> {\n\t\tconst context = await this.session.buildContext();\n\t\tconst resources = this.getResources();\n\t\tconst sessionMetadata = await this.session.getMetadata();\n\t\tconst tools = [...this.tools.values()];\n\t\tconst activeTools = this.activeToolNames\n\t\t\t.map((name) => this.tools.get(name))\n\t\t\t.filter((tool): tool is TTool => tool !== undefined);\n\t\tlet systemPrompt = \"You are a helpful assistant.\";\n\t\tif (typeof this.systemPrompt === \"string\") {\n\t\t\tsystemPrompt = this.systemPrompt;\n\t\t} else if (this.systemPrompt) {\n\t\t\tsystemPrompt = await this.systemPrompt({\n\t\t\t\tenv: this.env,\n\t\t\t\tsession: this.session,\n\t\t\t\tmodel: this.model,\n\t\t\t\tthinkingLevel: this.thinkingLevel,\n\t\t\t\tactiveTools,\n\t\t\t\tresources,\n\t\t\t});\n\t\t}\n\t\treturn {\n\t\t\tmessages: context.messages,\n\t\t\tresources,\n\t\t\tstreamOptions: cloneStreamOptions(this.streamOptions),\n\t\t\tsessionId: sessionMetadata.id,\n\t\t\tsystemPrompt,\n\t\t\tmodel: this.model,\n\t\t\tthinkingLevel: this.thinkingLevel,\n\t\t\ttools,\n\t\t\tactiveTools,\n\t\t};\n\t}\n\n\tprivate createContext(\n\t\tturnState: AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>,\n\t\tsystemPrompt?: string,\n\t): AgentContext {\n\t\treturn {\n\t\t\tsystemPrompt: systemPrompt ?? turnState.systemPrompt,\n\t\t\tmessages: turnState.messages.slice(),\n\t\t\ttools: turnState.activeTools.slice(),\n\t\t};\n\t}\n\n\tprivate createStreamFn(getTurnState: () => AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>): StreamFn {\n\t\treturn async (model, context, streamOptions) => {\n\t\t\tconst turnState = getTurnState();\n\t\t\tconst auth = await this.getApiKeyAndHeaders?.(model);\n\t\t\tconst snapshotOptions: AgentHarnessStreamOptions = {\n\t\t\t\t...turnState.streamOptions,\n\t\t\t\theaders: mergeHeaders(turnState.streamOptions.headers, auth?.headers),\n\t\t\t};\n\t\t\tconst requestOptions = await this.emitBeforeProviderRequest(model, turnState.sessionId, snapshotOptions);\n\t\t\treturn streamSimple(model, context, {\n\t\t\t\tcacheRetention: requestOptions.cacheRetention,\n\t\t\t\theaders: requestOptions.headers,\n\t\t\t\tmaxRetries: requestOptions.maxRetries,\n\t\t\t\tmaxRetryDelayMs: requestOptions.maxRetryDelayMs,\n\t\t\t\tmetadata: requestOptions.metadata,\n\t\t\t\tonPayload: async (payload) => await this.emitBeforeProviderPayload(model, payload),\n\t\t\t\tonResponse: async (response) => {\n\t\t\t\t\tconst headers = { ...(response.headers as Record<string, string>) };\n\t\t\t\t\tawait this.emitOwn(\n\t\t\t\t\t\t{ type: \"after_provider_response\", status: response.status, headers },\n\t\t\t\t\t\tstreamOptions?.signal,\n\t\t\t\t\t);\n\t\t\t\t},\n\t\t\t\treasoning: streamOptions?.reasoning,\n\t\t\t\tsignal: streamOptions?.signal,\n\t\t\t\tsessionId: turnState.sessionId,\n\t\t\t\ttimeoutMs: requestOptions.timeoutMs,\n\t\t\t\ttransport: requestOptions.transport,\n\t\t\t\tapiKey: auth?.apiKey,\n\t\t\t});\n\t\t};\n\t}\n\n\tprivate async drainQueuedMessages(queue: AgentMessage[], mode: QueueMode): Promise<AgentMessage[]> {\n\t\tconst messages = mode === \"all\" ? queue.splice(0) : queue.splice(0, 1);\n\t\tif (messages.length === 0) return messages;\n\t\ttry {\n\t\t\tawait this.emitQueueUpdate();\n\t\t\treturn messages;\n\t\t} catch (error) {\n\t\t\tqueue.unshift(...messages);\n\t\t\tthrow normalizeHookError(error);\n\t\t}\n\t}\n\n\tprivate createLoopConfig(\n\t\tgetTurnState: () => AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>,\n\t\tsetTurnState: (turnState: AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>) => void,\n\t): AgentLoopConfig {\n\t\tconst turnState = getTurnState();\n\t\treturn {\n\t\t\tmodel: turnState.model,\n\t\t\treasoning: turnState.thinkingLevel === \"off\" ? undefined : turnState.thinkingLevel,\n\t\t\tconvertToLlm,\n\t\t\ttransformContext: async (messages) => {\n\t\t\t\tconst result = await this.emitHook({ type: \"context\", messages: [...messages] });\n\t\t\t\treturn result?.messages ?? messages;\n\t\t\t},\n\t\t\tbeforeToolCall: async ({ toolCall, args }) => {\n\t\t\t\tconst result = await this.emitHook({\n\t\t\t\t\ttype: \"tool_call\",\n\t\t\t\t\ttoolCallId: toolCall.id,\n\t\t\t\t\ttoolName: toolCall.name,\n\t\t\t\t\tinput: args as Record<string, unknown>,\n\t\t\t\t});\n\t\t\t\treturn result ? { block: result.block, reason: result.reason } : undefined;\n\t\t\t},\n\t\t\tafterToolCall: async ({ toolCall, args, result, isError }) => {\n\t\t\t\tconst patch = await this.emitHook({\n\t\t\t\t\ttype: \"tool_result\",\n\t\t\t\t\ttoolCallId: toolCall.id,\n\t\t\t\t\ttoolName: toolCall.name,\n\t\t\t\t\tinput: args as Record<string, unknown>,\n\t\t\t\t\tcontent: result.content,\n\t\t\t\t\tdetails: result.details,\n\t\t\t\t\tisError,\n\t\t\t\t});\n\t\t\t\treturn patch\n\t\t\t\t\t? { content: patch.content, details: patch.details, isError: patch.isError, terminate: patch.terminate }\n\t\t\t\t\t: undefined;\n\t\t\t},\n\t\t\tprepareNextTurn: async () => {\n\t\t\t\tawait this.flushPendingSessionWrites();\n\t\t\t\tconst nextTurnState = await this.createTurnState();\n\t\t\t\tsetTurnState(nextTurnState);\n\t\t\t\treturn {\n\t\t\t\t\tcontext: this.createContext(nextTurnState),\n\t\t\t\t\tmodel: nextTurnState.model,\n\t\t\t\t\tthinkingLevel: nextTurnState.thinkingLevel,\n\t\t\t\t};\n\t\t\t},\n\t\t\tgetSteeringMessages: async () => this.drainQueuedMessages(this.steerQueue, this.steeringQueueMode),\n\t\t\tgetFollowUpMessages: async () => this.drainQueuedMessages(this.followUpQueue, this.followUpQueueMode),\n\t\t};\n\t}\n\n\tprivate validateUniqueNames(names: string[], message: string): void {\n\t\tconst duplicates = findDuplicateNames(names);\n\t\tif (duplicates.length > 0)\n\t\t\tthrow new AgentHarnessError(\"invalid_argument\", `${message}: ${duplicates.join(\", \")}`);\n\t}\n\n\tprivate validateToolNames(toolNames: string[], tools: Map<string, TTool> = this.tools): void {\n\t\tthis.validateUniqueNames(toolNames, \"Duplicate active tool name(s)\");\n\t\tconst missing = toolNames.filter((name) => !tools.has(name));\n\t\tif (missing.length > 0) throw new AgentHarnessError(\"invalid_argument\", `Unknown tool(s): ${missing.join(\", \")}`);\n\t}\n\n\tprivate async flushPendingSessionWrites(): Promise<void> {\n\t\twhile (this.pendingSessionWrites.length > 0) {\n\t\t\tconst write = this.pendingSessionWrites[0]!;\n\t\t\tif (write.type === \"message\") {\n\t\t\t\tawait this.session.appendMessage(write.message);\n\t\t\t} else if (write.type === \"model_change\") {\n\t\t\t\tawait this.session.appendModelChange(write.provider, write.modelId);\n\t\t\t} else if (write.type === \"thinking_level_change\") {\n\t\t\t\tawait this.session.appendThinkingLevelChange(write.thinkingLevel);\n\t\t\t} else if (write.type === \"active_tools_change\") {\n\t\t\t\tawait this.session.appendActiveToolsChange(write.activeToolNames);\n\t\t\t} else if (write.type === \"custom\") {\n\t\t\t\tawait this.session.appendCustomEntry(write.customType, write.data);\n\t\t\t} else if (write.type === \"custom_message\") {\n\t\t\t\tawait this.session.appendCustomMessageEntry(write.customType, write.content, write.display, write.details);\n\t\t\t} else if (write.type === \"label\") {\n\t\t\t\tawait this.session.appendLabel(write.targetId, write.label);\n\t\t\t} else if (write.type === \"session_info\") {\n\t\t\t\tawait this.session.appendSessionName(write.name ?? \"\");\n\t\t\t} else if (write.type === \"leaf\") {\n\t\t\t\tawait this.session.getStorage().setLeafId(write.targetId);\n\t\t\t}\n\t\t\tthis.pendingSessionWrites.shift();\n\t\t}\n\t}\n\n\tprivate async handleAgentEvent(event: AgentEvent, signal?: AbortSignal): Promise<void> {\n\t\tif (event.type === \"message_end\") {\n\t\t\tawait this.session.appendMessage(event.message);\n\t\t\tawait this.emitAny(event, signal);\n\t\t\treturn;\n\t\t}\n\t\tif (event.type === \"turn_end\") {\n\t\t\tlet eventError: unknown;\n\t\t\ttry {\n\t\t\t\tawait this.emitAny(event, signal);\n\t\t\t} catch (error) {\n\t\t\t\teventError = error;\n\t\t\t}\n\t\t\tconst hadPendingMutations = this.pendingSessionWrites.length > 0;\n\t\t\tawait this.flushPendingSessionWrites();\n\t\t\tif (eventError) throw eventError;\n\t\t\tawait this.emitOwn({ type: \"save_point\", hadPendingMutations });\n\t\t\treturn;\n\t\t}\n\t\tif (event.type === \"agent_end\") {\n\t\t\tawait this.flushPendingSessionWrites();\n\t\t\tthis.phase = \"idle\";\n\t\t\tawait this.emitAny(event, signal);\n\t\t\tawait this.emitOwn({ type: \"settled\", nextTurnCount: this.nextTurnQueue.length }, signal);\n\t\t\treturn;\n\t\t}\n\t\tawait this.emitAny(event, signal);\n\t}\n\n\tprivate async emitRunFailure(\n\t\tmodel: Model<any>,\n\t\terror: unknown,\n\t\taborted: boolean,\n\t\tsignal: AbortSignal,\n\t): Promise<AgentMessage[]> {\n\t\tconst failureMessage = createFailureMessage(model, error, aborted);\n\t\tawait this.handleAgentEvent({ type: \"message_start\", message: failureMessage }, signal);\n\t\tawait this.handleAgentEvent({ type: \"message_end\", message: failureMessage }, signal);\n\t\tawait this.handleAgentEvent({ type: \"turn_end\", message: failureMessage, toolResults: [] }, signal);\n\t\tawait this.handleAgentEvent({ type: \"agent_end\", messages: [failureMessage] }, signal);\n\t\treturn [failureMessage];\n\t}\n\n\tprivate async executeTurn(\n\t\tturnState: AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>,\n\t\ttext: string,\n\t\toptions?: { images?: ImageContent[] },\n\t): Promise<AssistantMessage> {\n\t\tlet activeTurnState = turnState;\n\t\tlet messages: AgentMessage[] = [createUserMessage(text, options?.images)];\n\t\tif (this.nextTurnQueue.length > 0) {\n\t\t\tconst queuedMessages = this.nextTurnQueue.splice(0);\n\t\t\ttry {\n\t\t\t\tawait this.emitQueueUpdate();\n\t\t\t} catch (error) {\n\t\t\t\tthis.nextTurnQueue.unshift(...queuedMessages);\n\t\t\t\tthrow normalizeHookError(error);\n\t\t\t}\n\t\t\tmessages = [...queuedMessages, messages[0]!];\n\t\t}\n\t\tconst beforeResult = await this.emitHook({\n\t\t\ttype: \"before_agent_start\",\n\t\t\tprompt: text,\n\t\t\timages: options?.images,\n\t\t\tsystemPrompt: turnState.systemPrompt,\n\t\t\tresources: turnState.resources,\n\t\t});\n\t\tif (beforeResult?.messages) messages = [...messages, ...beforeResult.messages];\n\n\t\tconst abortController = new AbortController();\n\t\tconst getTurnState = () => activeTurnState;\n\t\tconst setTurnState = (nextTurnState: AgentHarnessTurnState<TSkill, TPromptTemplate, TTool>) => {\n\t\t\tactiveTurnState = nextTurnState;\n\t\t};\n\t\tthis.runAbortController = abortController;\n\t\tconst runResultPromise = (async () => {\n\t\t\ttry {\n\t\t\t\treturn await runAgentLoop(\n\t\t\t\t\tmessages,\n\t\t\t\t\tthis.createContext(turnState, beforeResult?.systemPrompt),\n\t\t\t\t\tthis.createLoopConfig(getTurnState, setTurnState),\n\t\t\t\t\t(event) => this.handleAgentEvent(event, abortController.signal),\n\t\t\t\t\tabortController.signal,\n\t\t\t\t\tthis.createStreamFn(getTurnState),\n\t\t\t\t);\n\t\t\t} catch (error) {\n\t\t\t\ttry {\n\t\t\t\t\treturn await this.emitRunFailure(\n\t\t\t\t\t\tactiveTurnState.model,\n\t\t\t\t\t\terror,\n\t\t\t\t\t\tabortController.signal.aborted,\n\t\t\t\t\t\tabortController.signal,\n\t\t\t\t\t);\n\t\t\t\t} catch (failureError) {\n\t\t\t\t\tconst cause = new AggregateError(\n\t\t\t\t\t\t[toError(error), toError(failureError)],\n\t\t\t\t\t\t\"Agent run failed and failure reporting failed\",\n\t\t\t\t\t);\n\t\t\t\t\tthrow new AgentHarnessError(\"unknown\", cause.message, cause);\n\t\t\t\t}\n\t\t\t}\n\t\t})();\n\t\ttry {\n\t\t\tconst newMessages = await runResultPromise;\n\t\t\tfor (let i = newMessages.length - 1; i >= 0; i--) {\n\t\t\t\tconst message = newMessages[i]!;\n\t\t\t\tif (message.role === \"assistant\") {\n\t\t\t\t\treturn message;\n\t\t\t\t}\n\t\t\t}\n\t\t\tthrow new AgentHarnessError(\"invalid_state\", \"AgentHarness prompt completed without an assistant message\");\n\t\t} finally {\n\t\t\ttry {\n\t\t\t\tawait this.flushPendingSessionWrites();\n\t\t\t} finally {\n\t\t\t\tthis.runAbortController = undefined;\n\t\t\t}\n\t\t}\n\t}\n\n\tasync prompt(text: string, options?: { images?: ImageContent[] }): Promise<AssistantMessage> {\n\t\tif (this.phase !== \"idle\") throw new AgentHarnessError(\"busy\", \"AgentHarness is busy\");\n\t\tthis.phase = \"turn\";\n\t\tconst finishRunPromise = this.startRunPromise();\n\t\ttry {\n\t\t\tconst turnState = await this.createTurnState();\n\t\t\treturn await this.executeTurn(turnState, text, options);\n\t\t} catch (error) {\n\t\t\tthis.phase = \"idle\";\n\t\t\tthrow normalizeHarnessError(error, \"unknown\");\n\t\t} finally {\n\t\t\tfinishRunPromise();\n\t\t}\n\t}\n\n\tasync skill(name: string, additionalInstructions?: string): Promise<AssistantMessage> {\n\t\tif (this.phase !== \"idle\") throw new AgentHarnessError(\"busy\", \"AgentHarness is busy\");\n\t\tthis.phase = \"turn\";\n\t\tconst finishRunPromise = this.startRunPromise();\n\t\ttry {\n\t\t\tconst turnState = await this.createTurnState();\n\t\t\tconst skill = (turnState.resources.skills ?? []).find((candidate) => candidate.name === name);\n\t\t\tif (!skill) throw new AgentHarnessError(\"invalid_argument\", `Unknown skill: ${name}`);\n\t\t\treturn await this.executeTurn(turnState, formatSkillInvocation(skill, additionalInstructions));\n\t\t} catch (error) {\n\t\t\tthis.phase = \"idle\";\n\t\t\tthrow normalizeHarnessError(error, \"unknown\");\n\t\t} finally {\n\t\t\tfinishRunPromise();\n\t\t}\n\t}\n\n\tasync promptFromTemplate(name: string, args: string[] = []): Promise<AssistantMessage> {\n\t\tif (this.phase !== \"idle\") throw new AgentHarnessError(\"busy\", \"AgentHarness is busy\");\n\t\tthis.phase = \"turn\";\n\t\tconst finishRunPromise = this.startRunPromise();\n\t\ttry {\n\t\t\tconst turnState = await this.createTurnState();\n\t\t\tconst template = (turnState.resources.promptTemplates ?? []).find((candidate) => candidate.name === name);\n\t\t\tif (!template) throw new AgentHarnessError(\"invalid_argument\", `Unknown prompt template: ${name}`);\n\t\t\treturn await this.executeTurn(turnState, formatPromptTemplateInvocation(template, args));\n\t\t} catch (error) {\n\t\t\tthis.phase = \"idle\";\n\t\t\tthrow normalizeHarnessError(error, \"unknown\");\n\t\t} finally {\n\t\t\tfinishRunPromise();\n\t\t}\n\t}\n\n\tasync steer(text: string, options?: { images?: ImageContent[] }): Promise<void> {\n\t\tif (this.phase === \"idle\") throw new AgentHarnessError(\"invalid_state\", \"Cannot steer while idle\");\n\t\tthis.steerQueue.push(createUserMessage(text, options?.images));\n\t\tawait this.emitQueueUpdate();\n\t}\n\n\tasync followUp(text: string, options?: { images?: ImageContent[] }): Promise<void> {\n\t\tif (this.phase === \"idle\") throw new AgentHarnessError(\"invalid_state\", \"Cannot follow up while idle\");\n\t\tthis.followUpQueue.push(createUserMessage(text, options?.images));\n\t\tawait this.emitQueueUpdate();\n\t}\n\n\tasync nextTurn(text: string, options?: { images?: ImageContent[] }): Promise<void> {\n\t\tthis.nextTurnQueue.push(createUserMessage(text, options?.images));\n\t\tawait this.emitQueueUpdate();\n\t}\n\n\tasync appendMessage(message: AgentMessage): Promise<void> {\n\t\ttry {\n\t\t\tif (this.phase === \"idle\") {\n\t\t\t\tawait this.session.appendMessage(message);\n\t\t\t} else {\n\t\t\t\tthis.pendingSessionWrites.push({ type: \"message\", message });\n\t\t\t}\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"session\");\n\t\t}\n\t}\n\n\tasync compact(\n\t\tcustomInstructions?: string,\n\t): Promise<{ summary: string; firstKeptEntryId: string; tokensBefore: number; details?: unknown }> {\n\t\tif (this.phase !== \"idle\") throw new AgentHarnessError(\"busy\", \"compact() requires idle harness\");\n\t\tthis.phase = \"compaction\";\n\t\ttry {\n\t\t\tconst model = this.model;\n\t\t\tif (!model) throw new AgentHarnessError(\"invalid_state\", \"No model set for compaction\");\n\t\t\tconst auth = await this.getApiKeyAndHeaders?.(model);\n\t\t\tif (!auth) throw new AgentHarnessError(\"auth\", \"No auth available for compaction\");\n\t\t\tconst branchEntries = await this.session.getBranch();\n\t\t\tconst preparationResult = prepareCompaction(branchEntries, DEFAULT_COMPACTION_SETTINGS);\n\t\t\tif (!preparationResult.ok) throw preparationResult.error;\n\t\t\tconst preparation = preparationResult.value;\n\t\t\tif (!preparation) throw new AgentHarnessError(\"compaction\", \"Nothing to compact\");\n\t\t\tconst hookResult = await this.emitHook({\n\t\t\t\ttype: \"session_before_compact\",\n\t\t\t\tpreparation,\n\t\t\t\tbranchEntries,\n\t\t\t\tcustomInstructions,\n\t\t\t\tsignal: new AbortController().signal,\n\t\t\t});\n\t\t\tif (hookResult?.cancel) throw new AgentHarnessError(\"compaction\", \"Compaction cancelled\");\n\t\t\tconst provided = hookResult?.compaction;\n\t\t\tconst compactResult = provided\n\t\t\t\t? { ok: true as const, value: provided }\n\t\t\t\t: await compact(\n\t\t\t\t\t\tpreparation,\n\t\t\t\t\t\tmodel,\n\t\t\t\t\t\tauth.apiKey,\n\t\t\t\t\t\tauth.headers,\n\t\t\t\t\t\tcustomInstructions,\n\t\t\t\t\t\tundefined,\n\t\t\t\t\t\tthis.thinkingLevel,\n\t\t\t\t\t);\n\t\t\tif (!compactResult.ok) throw compactResult.error;\n\t\t\tconst result = compactResult.value;\n\t\t\tconst entryId = await this.session.appendCompaction(\n\t\t\t\tresult.summary,\n\t\t\t\tresult.firstKeptEntryId,\n\t\t\t\tresult.tokensBefore,\n\t\t\t\tresult.details,\n\t\t\t\tprovided !== undefined,\n\t\t\t);\n\t\t\tconst entry = await this.session.getEntry(entryId);\n\t\t\tif (entry?.type === \"compaction\") {\n\t\t\t\tawait this.emitOwn({ type: \"session_compact\", compactionEntry: entry, fromHook: provided !== undefined });\n\t\t\t}\n\t\t\treturn result;\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"compaction\");\n\t\t} finally {\n\t\t\tthis.phase = \"idle\";\n\t\t}\n\t}\n\n\tasync navigateTree(\n\t\ttargetId: string,\n\t\toptions?: { summarize?: boolean; customInstructions?: string; replaceInstructions?: boolean; label?: string },\n\t): Promise<NavigateTreeResult> {\n\t\tif (this.phase !== \"idle\") throw new AgentHarnessError(\"busy\", \"navigateTree() requires idle harness\");\n\t\tthis.phase = \"branch_summary\";\n\t\ttry {\n\t\t\tconst oldLeafId = await this.session.getLeafId();\n\t\t\tif (oldLeafId === targetId) return { cancelled: false };\n\t\t\tconst targetEntry = await this.session.getEntry(targetId);\n\t\t\tif (!targetEntry) throw new AgentHarnessError(\"invalid_argument\", `Entry ${targetId} not found`);\n\t\t\tconst { entries, commonAncestorId } = await collectEntriesForBranchSummary(this.session, oldLeafId, targetId);\n\t\t\tconst preparation = {\n\t\t\t\ttargetId,\n\t\t\t\toldLeafId,\n\t\t\t\tcommonAncestorId,\n\t\t\t\tentriesToSummarize: entries,\n\t\t\t\tuserWantsSummary: options?.summarize ?? false,\n\t\t\t\tcustomInstructions: options?.customInstructions,\n\t\t\t\treplaceInstructions: options?.replaceInstructions,\n\t\t\t\tlabel: options?.label,\n\t\t\t};\n\t\t\tconst signal = new AbortController().signal;\n\t\t\tconst hookResult = await this.emitHook({ type: \"session_before_tree\", preparation, signal });\n\t\t\tif (hookResult?.cancel) return { cancelled: true };\n\t\t\tlet summaryEntry: NavigateTreeResult[\"summaryEntry\"];\n\t\t\tlet summaryText: string | undefined = hookResult?.summary?.summary;\n\t\t\tlet summaryDetails: unknown = hookResult?.summary?.details;\n\t\t\tif (!summaryText && options?.summarize && entries.length > 0) {\n\t\t\t\tconst model = this.model;\n\t\t\t\tif (!model) throw new AgentHarnessError(\"invalid_state\", \"No model set for branch summary\");\n\t\t\t\tconst auth = await this.getApiKeyAndHeaders?.(model);\n\t\t\t\tif (!auth) throw new AgentHarnessError(\"auth\", \"No auth available for branch summary\");\n\t\t\t\tconst branchSummary = await generateBranchSummary(entries, {\n\t\t\t\t\tmodel,\n\t\t\t\t\tapiKey: auth.apiKey,\n\t\t\t\t\theaders: auth.headers,\n\t\t\t\t\tsignal: new AbortController().signal,\n\t\t\t\t\tcustomInstructions: hookResult?.customInstructions ?? options?.customInstructions,\n\t\t\t\t\treplaceInstructions: hookResult?.replaceInstructions ?? options?.replaceInstructions,\n\t\t\t\t});\n\t\t\t\tif (!branchSummary.ok) {\n\t\t\t\t\tif (branchSummary.error.code === \"aborted\") return { cancelled: true };\n\t\t\t\t\tthrow new AgentHarnessError(\"branch_summary\", branchSummary.error.message, branchSummary.error);\n\t\t\t\t}\n\t\t\t\tsummaryText = branchSummary.value.summary;\n\t\t\t\tsummaryDetails = {\n\t\t\t\t\treadFiles: branchSummary.value.readFiles,\n\t\t\t\t\tmodifiedFiles: branchSummary.value.modifiedFiles,\n\t\t\t\t};\n\t\t\t}\n\t\t\tlet editorText: string | undefined;\n\t\t\tlet newLeafId: string | null;\n\t\t\tif (targetEntry.type === \"message\" && targetEntry.message.role === \"user\") {\n\t\t\t\tnewLeafId = targetEntry.parentId;\n\t\t\t\tconst content = targetEntry.message.content;\n\t\t\t\teditorText =\n\t\t\t\t\ttypeof content === \"string\"\n\t\t\t\t\t\t? content\n\t\t\t\t\t\t: content\n\t\t\t\t\t\t\t\t.filter((c): c is { readonly type: \"text\"; readonly text: string } => c.type === \"text\")\n\t\t\t\t\t\t\t\t.map((c) => c.text)\n\t\t\t\t\t\t\t\t.join(\"\");\n\t\t\t} else if (targetEntry.type === \"custom_message\") {\n\t\t\t\tnewLeafId = targetEntry.parentId;\n\t\t\t\teditorText =\n\t\t\t\t\ttypeof targetEntry.content === \"string\"\n\t\t\t\t\t\t? targetEntry.content\n\t\t\t\t\t\t: targetEntry.content\n\t\t\t\t\t\t\t\t.filter((c): c is { readonly type: \"text\"; readonly text: string } => c.type === \"text\")\n\t\t\t\t\t\t\t\t.map((c) => c.text)\n\t\t\t\t\t\t\t\t.join(\"\");\n\t\t\t} else {\n\t\t\t\tnewLeafId = targetId;\n\t\t\t}\n\t\t\tconst summaryId = await this.session.moveTo(\n\t\t\t\tnewLeafId,\n\t\t\t\tsummaryText\n\t\t\t\t\t? { summary: summaryText, details: summaryDetails, fromHook: hookResult?.summary !== undefined }\n\t\t\t\t\t: undefined,\n\t\t\t);\n\t\t\tif (summaryId) {\n\t\t\t\tconst entry = await this.session.getEntry(summaryId);\n\t\t\t\tif (entry?.type === \"branch_summary\") summaryEntry = entry;\n\t\t\t}\n\t\t\tawait this.emitOwn({\n\t\t\t\ttype: \"session_tree\",\n\t\t\t\tnewLeafId: await this.session.getLeafId(),\n\t\t\t\toldLeafId,\n\t\t\t\tsummaryEntry,\n\t\t\t\tfromHook: hookResult?.summary !== undefined,\n\t\t\t});\n\t\t\treturn { cancelled: false, editorText, summaryEntry };\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"branch_summary\");\n\t\t} finally {\n\t\t\tthis.phase = \"idle\";\n\t\t}\n\t}\n\n\tgetModel(): Model<any> {\n\t\treturn this.model;\n\t}\n\n\tasync setModel(model: Model<any>): Promise<void> {\n\t\ttry {\n\t\t\tconst previousModel = this.model;\n\t\t\tif (this.phase === \"idle\") {\n\t\t\t\tawait this.session.appendModelChange(model.provider, model.id);\n\t\t\t} else {\n\t\t\t\tthis.pendingSessionWrites.push({ type: \"model_change\", provider: model.provider, modelId: model.id });\n\t\t\t}\n\t\t\tthis.model = model;\n\t\t\tawait this.emitOwn({ type: \"model_update\", model, previousModel, source: \"set\" });\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"session\");\n\t\t}\n\t}\n\n\tgetThinkingLevel(): ThinkingLevel {\n\t\treturn this.thinkingLevel;\n\t}\n\n\tasync setThinkingLevel(level: ThinkingLevel): Promise<void> {\n\t\ttry {\n\t\t\tconst previousLevel = this.thinkingLevel;\n\t\t\tif (this.phase === \"idle\") {\n\t\t\t\tawait this.session.appendThinkingLevelChange(level);\n\t\t\t} else {\n\t\t\t\tthis.pendingSessionWrites.push({ type: \"thinking_level_change\", thinkingLevel: level });\n\t\t\t}\n\t\t\tthis.thinkingLevel = level;\n\t\t\tawait this.emitOwn({ type: \"thinking_level_update\", level, previousLevel });\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"session\");\n\t\t}\n\t}\n\n\tgetTools(): TTool[] {\n\t\treturn [...this.tools.values()];\n\t}\n\n\tasync setTools(tools: TTool[], activeToolNames?: string[]): Promise<void> {\n\t\ttry {\n\t\t\tthis.validateUniqueNames(\n\t\t\t\ttools.map((tool) => tool.name),\n\t\t\t\t\"Duplicate tool name(s)\",\n\t\t\t);\n\t\t\tconst nextTools = new Map(tools.map((tool) => [tool.name, tool]));\n\t\t\tconst nextActiveToolNames = activeToolNames ? [...activeToolNames] : this.activeToolNames;\n\t\t\tthis.validateToolNames(nextActiveToolNames, nextTools);\n\t\t\tconst previousToolNames = [...this.tools.keys()];\n\t\t\tconst previousActiveToolNames = [...this.activeToolNames];\n\t\t\tif (this.phase === \"idle\") {\n\t\t\t\tawait this.session.appendActiveToolsChange(nextActiveToolNames);\n\t\t\t} else {\n\t\t\t\tthis.pendingSessionWrites.push({ type: \"active_tools_change\", activeToolNames: [...nextActiveToolNames] });\n\t\t\t}\n\t\t\tthis.tools = nextTools;\n\t\t\tthis.activeToolNames = [...nextActiveToolNames];\n\t\t\tawait this.emitOwn({\n\t\t\t\ttype: \"tools_update\",\n\t\t\t\ttoolNames: [...this.tools.keys()],\n\t\t\t\tpreviousToolNames,\n\t\t\t\tactiveToolNames: [...this.activeToolNames],\n\t\t\t\tpreviousActiveToolNames,\n\t\t\t\tsource: \"set\",\n\t\t\t});\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"invalid_argument\");\n\t\t}\n\t}\n\n\tgetActiveTools(): TTool[] {\n\t\treturn this.activeToolNames.map((name) => this.tools.get(name)!);\n\t}\n\n\tasync setActiveTools(toolNames: string[]): Promise<void> {\n\t\ttry {\n\t\t\tthis.validateToolNames(toolNames);\n\t\t\tconst previousToolNames = [...this.tools.keys()];\n\t\t\tconst previousActiveToolNames = [...this.activeToolNames];\n\t\t\tif (this.phase === \"idle\") {\n\t\t\t\tawait this.session.appendActiveToolsChange(toolNames);\n\t\t\t} else {\n\t\t\t\tthis.pendingSessionWrites.push({ type: \"active_tools_change\", activeToolNames: [...toolNames] });\n\t\t\t}\n\t\t\tthis.activeToolNames = [...toolNames];\n\t\t\tawait this.emitOwn({\n\t\t\t\ttype: \"tools_update\",\n\t\t\t\ttoolNames: [...this.tools.keys()],\n\t\t\t\tpreviousToolNames,\n\t\t\t\tactiveToolNames: [...this.activeToolNames],\n\t\t\t\tpreviousActiveToolNames,\n\t\t\t\tsource: \"set\",\n\t\t\t});\n\t\t} catch (error) {\n\t\t\tthrow normalizeHarnessError(error, \"invalid_argument\");\n\t\t}\n\t}\n\n\tgetSteeringMode(): QueueMode {\n\t\treturn this.steeringQueueMode;\n\t}\n\n\tasync setSteeringMode(mode: QueueMode): Promise<void> {\n\t\tthis.steeringQueueMode = mode;\n\t}\n\n\tgetFollowUpMode(): QueueMode {\n\t\treturn this.followUpQueueMode;\n\t}\n\n\tasync setFollowUpMode(mode: QueueMode): Promise<void> {\n\t\tthis.followUpQueueMode = mode;\n\t}\n\n\tgetResources(): AgentHarnessResources<TSkill, TPromptTemplate> {\n\t\treturn {\n\t\t\tskills: this.resources.skills?.slice(),\n\t\t\tpromptTemplates: this.resources.promptTemplates?.slice(),\n\t\t};\n\t}\n\n\tasync setResources(resources: AgentHarnessResources<TSkill, TPromptTemplate>): Promise<void> {\n\t\tconst previousResources = this.getResources();\n\t\tthis.resources = {\n\t\t\tskills: resources.skills?.slice(),\n\t\t\tpromptTemplates: resources.promptTemplates?.slice(),\n\t\t};\n\t\tawait this.emitOwn({ type: \"resources_update\", resources: this.getResources(), previousResources });\n\t}\n\n\tgetStreamOptions(): AgentHarnessStreamOptions {\n\t\treturn cloneStreamOptions(this.streamOptions);\n\t}\n\n\tasync setStreamOptions(streamOptions: AgentHarnessStreamOptions): Promise<void> {\n\t\tthis.streamOptions = cloneStreamOptions(streamOptions);\n\t}\n\n\tasync abort(): Promise<AbortResult> {\n\t\tconst clearedSteer = [...this.steerQueue];\n\t\tconst clearedFollowUp = [...this.followUpQueue];\n\t\tthis.steerQueue = [];\n\t\tthis.followUpQueue = [];\n\t\tthis.runAbortController?.abort();\n\t\tconst errors: Error[] = [];\n\t\ttry {\n\t\t\tawait this.emitQueueUpdate();\n\t\t} catch (error) {\n\t\t\terrors.push(toError(error));\n\t\t}\n\t\ttry {\n\t\t\tawait this.waitForIdle();\n\t\t} catch (error) {\n\t\t\terrors.push(toError(error));\n\t\t}\n\t\ttry {\n\t\t\tawait this.emitOwn({ type: \"abort\", clearedSteer, clearedFollowUp });\n\t\t} catch (error) {\n\t\t\terrors.push(toError(error));\n\t\t}\n\t\tif (errors.length > 0) {\n\t\t\tconst cause = errors.length === 1 ? errors[0]! : new AggregateError(errors, \"Abort completed with errors\");\n\t\t\tthrow normalizeHarnessError(cause, \"hook\");\n\t\t}\n\t\treturn { clearedSteer, clearedFollowUp };\n\t}\n\n\tasync waitForIdle(): Promise<void> {\n\t\tawait this.runPromise;\n\t}\n\n\tsubscribe(\n\t\tlistener: (event: AgentHarnessEvent<TSkill, TPromptTemplate>, signal?: AbortSignal) => Promise<void> | void,\n\t): () => void {\n\t\tlet handlers = this.handlers.get(SUBSCRIBER_EVENT_TYPE);\n\t\tif (!handlers) {\n\t\t\thandlers = new Set();\n\t\t\tthis.handlers.set(SUBSCRIBER_EVENT_TYPE, handlers);\n\t\t}\n\t\thandlers.add(listener as AgentHarnessHandler);\n\t\treturn () => handlers!.delete(listener as AgentHarnessHandler);\n\t}\n\n\ton<TType extends keyof AgentHarnessEventResultMap>(\n\t\ttype: TType,\n\t\thandler: (\n\t\t\tevent: Extract<AgentHarnessOwnEvent, { type: TType }>,\n\t\t) => Promise<AgentHarnessEventResultMap[TType]> | AgentHarnessEventResultMap[TType],\n\t): () => void {\n\t\tlet handlers = this.handlers.get(type);\n\t\tif (!handlers) {\n\t\t\thandlers = new Set();\n\t\t\tthis.handlers.set(type, handlers);\n\t\t}\n\t\thandlers.add(handler as AgentHarnessHandler);\n\t\treturn () => handlers!.delete(handler as AgentHarnessHandler);\n\t}\n}\n"]}