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{ join } from \"node:path\";\nimport { Agent, type AgentMessage, type ThinkingLevel } from \"@mariozechner/pi-agent-core\";\nimport { clampThinkingLevel, type Message, type Model, streamSimple } from \"@mariozechner/pi-ai\";\nimport { getAgentDir } from \"../config.js\";\nimport { AgentSession } from \"./agent-session.js\";\nimport { formatNoModelsAvailableMessage } from \"./auth-guidance.js\";\nimport { AuthStorage } from \"./auth-storage.js\";\nimport { DEFAULT_THINKING_LEVEL } from \"./defaults.js\";\nimport type { ExtensionRunner, LoadExtensionsResult, SessionStartEvent, ToolDefinition } from \"./extensions/index.js\";\nimport { convertToLlm } from \"./messages.js\";\nimport { ModelRegistry } from \"./model-registry.js\";\nimport { findInitialModel } from \"./model-resolver.js\";\nimport type { ResourceLoader } from \"./resource-loader.js\";\nimport { DefaultResourceLoader } from \"./resource-loader.js\";\nimport { getDefaultSessionDir, SessionManager } from \"./session-manager.js\";\nimport { SettingsManager } from \"./settings-manager.js\";\nimport { isInstallTelemetryEnabled } from \"./telemetry.js\";\nimport { time } from \"./timings.js\";\nimport {\n\tcreateBashTool,\n\tcreateCodingTools,\n\tcreateEditTool,\n\tcreateFindTool,\n\tcreateGrepTool,\n\tcreateLsTool,\n\tcreateReadOnlyTools,\n\tcreateReadTool,\n\tcreateWriteTool,\n\ttype ToolName,\n\twithFileMutationQueue,\n} from \"./tools/index.js\";\n\nexport interface CreateAgentSessionOptions {\n\t/** Working directory for project-local discovery. Default: process.cwd() */\n\tcwd?: string;\n\t/** Global config directory. Default: ~/.pi/agent */\n\tagentDir?: string;\n\n\t/** Auth storage for credentials. Default: AuthStorage.create(agentDir/auth.json) */\n\tauthStorage?: AuthStorage;\n\t/** Model registry. Default: ModelRegistry.create(authStorage, agentDir/models.json) */\n\tmodelRegistry?: ModelRegistry;\n\n\t/** Model to use. Default: from settings, else first available */\n\tmodel?: Model<any>;\n\t/** Thinking level. Default: from settings, else 'medium' (clamped to model capabilities) */\n\tthinkingLevel?: ThinkingLevel;\n\t/** Models available for cycling (Ctrl+P in interactive mode) */\n\tscopedModels?: Array<{ model: Model<any>; thinkingLevel?: ThinkingLevel }>;\n\n\t/**\n\t * Optional default tool suppression mode when no explicit allowlist is provided.\n\t *\n\t * - \"all\": start with no tools enabled\n\t * - \"builtin\": disable the default built-in tools (read, bash, edit, write)\n\t *   but keep extension/custom tools enabled\n\t */\n\tnoTools?: \"all\" | \"builtin\";\n\t/**\n\t * Optional allowlist of tool names.\n\t *\n\t * When omitted, pi enables the default built-in tools (read, bash, edit, write)\n\t * and leaves extension/custom tools enabled unless `noTools` changes that default.\n\t * When provided, only the listed tool names are enabled.\n\t */\n\ttools?: string[];\n\t/** Custom tools to register (in addition to built-in tools). */\n\tcustomTools?: ToolDefinition[];\n\n\t/** Resource loader. When omitted, DefaultResourceLoader is used. */\n\tresourceLoader?: ResourceLoader;\n\n\t/** Session manager. Default: SessionManager.create(cwd) */\n\tsessionManager?: SessionManager;\n\n\t/** Settings manager. Default: SettingsManager.create(cwd, agentDir) */\n\tsettingsManager?: SettingsManager;\n\t/** Session start event metadata for extension runtime startup. */\n\tsessionStartEvent?: SessionStartEvent;\n}\n\n/** Result from createAgentSession */\nexport interface CreateAgentSessionResult {\n\t/** The created session */\n\tsession: AgentSession;\n\t/** Extensions result (for UI context setup in interactive mode) */\n\textensionsResult: LoadExtensionsResult;\n\t/** Warning if session was restored with a different model than saved */\n\tmodelFallbackMessage?: string;\n}\n\n// Re-exports\n\nexport * from \"./agent-session-runtime.js\";\nexport type {\n\tExtensionAPI,\n\tExtensionCommandContext,\n\tExtensionContext,\n\tExtensionFactory,\n\tSlashCommandInfo,\n\tSlashCommandSource,\n\tToolDefinition,\n} from \"./extensions/index.js\";\nexport type { PromptTemplate } from \"./prompt-templates.js\";\nexport type { Skill } from \"./skills.js\";\nexport type { Tool } from \"./tools/index.js\";\n\nexport {\n\twithFileMutationQueue,\n\t// Tool factories (for custom cwd)\n\tcreateCodingTools,\n\tcreateReadOnlyTools,\n\tcreateReadTool,\n\tcreateBashTool,\n\tcreateEditTool,\n\tcreateWriteTool,\n\tcreateGrepTool,\n\tcreateFindTool,\n\tcreateLsTool,\n};\n\n// Helper Functions\n\nfunction getDefaultAgentDir(): string {\n\treturn getAgentDir();\n}\n\nfunction getAttributionHeaders(\n\tmodel: Model<any>,\n\tsettingsManager: SettingsManager,\n): Record<string, string> | undefined {\n\tif (!isInstallTelemetryEnabled(settingsManager)) {\n\t\treturn undefined;\n\t}\n\n\tif (model.provider === \"openrouter\" || model.baseUrl.includes(\"openrouter.ai\")) {\n\t\treturn {\n\t\t\t\"HTTP-Referer\": \"https://pi.dev\",\n\t\t\t\"X-OpenRouter-Title\": \"pi\",\n\t\t\t\"X-OpenRouter-Categories\": \"cli-agent\",\n\t\t};\n\t}\n\n\tif (\n\t\tmodel.provider === \"cloudflare-workers-ai\" ||\n\t\tmodel.provider === \"cloudflare-ai-gateway\" ||\n\t\tmodel.baseUrl.includes(\"api.cloudflare.com\") ||\n\t\tmodel.baseUrl.includes(\"gateway.ai.cloudflare.com\")\n\t) {\n\t\treturn {\n\t\t\t\"User-Agent\": \"pi-coding-agent\",\n\t\t};\n\t}\n\n\treturn undefined;\n}\n\n/**\n * Create an AgentSession with the specified options.\n *\n * @example\n * ```typescript\n * // Minimal - uses defaults\n * const { session } = await createAgentSession();\n *\n * // With explicit model\n * import { getModel } from '@mariozechner/pi-ai';\n * const { session } = await createAgentSession({\n *   model: getModel('anthropic', 'claude-opus-4-5'),\n *   thinkingLevel: 'high',\n * });\n *\n * // Continue previous session\n * const { session, modelFallbackMessage } = await createAgentSession({\n *   continueSession: true,\n * });\n *\n * // Full control\n * const loader = new DefaultResourceLoader({\n *   cwd: process.cwd(),\n *   agentDir: getAgentDir(),\n *   settingsManager: SettingsManager.create(),\n * });\n * await loader.reload();\n * const { session } = await createAgentSession({\n *   model: myModel,\n *   tools: [readTool, bashTool],\n *   resourceLoader: loader,\n *   sessionManager: SessionManager.inMemory(),\n * });\n * ```\n */\nexport async function createAgentSession(options: CreateAgentSessionOptions = {}): Promise<CreateAgentSessionResult> {\n\tconst cwd = options.cwd ?? options.sessionManager?.getCwd() ?? process.cwd();\n\tconst agentDir = options.agentDir ?? getDefaultAgentDir();\n\tlet resourceLoader = options.resourceLoader;\n\n\t// Use provided or create AuthStorage and ModelRegistry\n\tconst authPath = options.agentDir ? join(agentDir, \"auth.json\") : undefined;\n\tconst modelsPath = options.agentDir ? join(agentDir, \"models.json\") : undefined;\n\tconst authStorage = options.authStorage ?? AuthStorage.create(authPath);\n\tconst modelRegistry = options.modelRegistry ?? ModelRegistry.create(authStorage, modelsPath);\n\n\tconst settingsManager = options.settingsManager ?? SettingsManager.create(cwd, agentDir);\n\tconst sessionManager = options.sessionManager ?? SessionManager.create(cwd, getDefaultSessionDir(cwd, agentDir));\n\n\tif (!resourceLoader) {\n\t\tresourceLoader = new DefaultResourceLoader({ cwd, agentDir, settingsManager });\n\t\tawait resourceLoader.reload();\n\t\ttime(\"resourceLoader.reload\");\n\t}\n\n\t// Check if session has existing data to restore\n\tconst existingSession = sessionManager.buildSessionContext();\n\tconst hasExistingSession = existingSession.messages.length > 0;\n\tconst hasThinkingEntry = sessionManager.getBranch().some((entry) => entry.type === \"thinking_level_change\");\n\n\tlet model = options.model;\n\tlet modelFallbackMessage: string | undefined;\n\n\t// If session has data, try to restore model from it\n\tif (!model && hasExistingSession && existingSession.model) {\n\t\tconst restoredModel = modelRegistry.find(existingSession.model.provider, existingSession.model.modelId);\n\t\tif (restoredModel && modelRegistry.hasConfiguredAuth(restoredModel)) {\n\t\t\tmodel = restoredModel;\n\t\t}\n\t\tif (!model) {\n\t\t\tmodelFallbackMessage = `Could not restore model ${existingSession.model.provider}/${existingSession.model.modelId}`;\n\t\t}\n\t}\n\n\t// If still no model, use findInitialModel (checks settings default, then provider defaults)\n\tif (!model) {\n\t\tconst result = await findInitialModel({\n\t\t\tscopedModels: [],\n\t\t\tisContinuing: hasExistingSession,\n\t\t\tdefaultProvider: settingsManager.getDefaultProvider(),\n\t\t\tdefaultModelId: settingsManager.getDefaultModel(),\n\t\t\tdefaultThinkingLevel: settingsManager.getDefaultThinkingLevel(),\n\t\t\tmodelRegistry,\n\t\t});\n\t\tmodel = result.model;\n\t\tif (!model) {\n\t\t\tmodelFallbackMessage = formatNoModelsAvailableMessage();\n\t\t} else if (modelFallbackMessage) {\n\t\t\tmodelFallbackMessage += `. Using ${model.provider}/${model.id}`;\n\t\t}\n\t}\n\n\tlet thinkingLevel = options.thinkingLevel;\n\n\t// If session has data, restore thinking level from it\n\tif (thinkingLevel === undefined && hasExistingSession) {\n\t\tthinkingLevel = hasThinkingEntry\n\t\t\t? (existingSession.thinkingLevel as ThinkingLevel)\n\t\t\t: (settingsManager.getDefaultThinkingLevel() ?? DEFAULT_THINKING_LEVEL);\n\t}\n\n\t// Fall back to settings default\n\tif (thinkingLevel === undefined) {\n\t\tthinkingLevel = settingsManager.getDefaultThinkingLevel() ?? DEFAULT_THINKING_LEVEL;\n\t}\n\n\t// Clamp to model capabilities\n\tif (!model) {\n\t\tthinkingLevel = \"off\";\n\t} else {\n\t\tthinkingLevel = clampThinkingLevel(model, thinkingLevel) as ThinkingLevel;\n\t}\n\n\tconst defaultActiveToolNames: ToolName[] = [\"read\", \"bash\", \"edit\", \"write\"];\n\tconst allowedToolNames = options.tools ?? (options.noTools === \"all\" ? [] : undefined);\n\tconst initialActiveToolNames: string[] = options.tools\n\t\t? [...options.tools]\n\t\t: options.noTools\n\t\t\t? []\n\t\t\t: defaultActiveToolNames;\n\n\tlet agent: Agent;\n\n\t// Create convertToLlm wrapper that filters images if blockImages is enabled (defense-in-depth)\n\tconst convertToLlmWithBlockImages = (messages: AgentMessage[]): Message[] => {\n\t\tconst converted = convertToLlm(messages);\n\t\t// Check setting dynamically so mid-session changes take effect\n\t\tif (!settingsManager.getBlockImages()) {\n\t\t\treturn converted;\n\t\t}\n\t\t// Filter out ImageContent from all messages, replacing with text placeholder\n\t\treturn converted.map((msg) => {\n\t\t\tif (msg.role === \"user\" || msg.role === \"toolResult\") {\n\t\t\t\tconst content = msg.content;\n\t\t\t\tif (Array.isArray(content)) {\n\t\t\t\t\tconst hasImages = content.some((c) => c.type === \"image\");\n\t\t\t\t\tif (hasImages) {\n\t\t\t\t\t\tconst filteredContent = content\n\t\t\t\t\t\t\t.map((c) =>\n\t\t\t\t\t\t\t\tc.type === \"image\" ? { type: \"text\" as const, text: \"Image reading is disabled.\" } : c,\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t\t.filter(\n\t\t\t\t\t\t\t\t(c, i, arr) =>\n\t\t\t\t\t\t\t\t\t// Dedupe consecutive \"Image reading is disabled.\" texts\n\t\t\t\t\t\t\t\t\t!(\n\t\t\t\t\t\t\t\t\t\tc.type === \"text\" &&\n\t\t\t\t\t\t\t\t\t\tc.text === \"Image reading is disabled.\" &&\n\t\t\t\t\t\t\t\t\t\ti > 0 &&\n\t\t\t\t\t\t\t\t\t\tarr[i - 1].type === \"text\" &&\n\t\t\t\t\t\t\t\t\t\t(arr[i - 1] as { type: \"text\"; text: string }).text === \"Image reading is disabled.\"\n\t\t\t\t\t\t\t\t\t),\n\t\t\t\t\t\t\t);\n\t\t\t\t\t\treturn { ...msg, content: filteredContent };\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn msg;\n\t\t});\n\t};\n\n\tconst extensionRunnerRef: { current?: ExtensionRunner } = {};\n\n\tagent = new Agent({\n\t\tinitialState: {\n\t\t\tsystemPrompt: \"\",\n\t\t\tmodel,\n\t\t\tthinkingLevel,\n\t\t\ttools: [],\n\t\t},\n\t\tconvertToLlm: convertToLlmWithBlockImages,\n\t\tstreamFn: async (model, context, options) => {\n\t\t\tconst auth = await modelRegistry.getApiKeyAndHeaders(model);\n\t\t\tif (!auth.ok) {\n\t\t\t\tthrow new Error(auth.error);\n\t\t\t}\n\t\t\tconst providerRetrySettings = settingsManager.getProviderRetrySettings();\n\t\t\tconst attributionHeaders = getAttributionHeaders(model, settingsManager);\n\t\t\treturn streamSimple(model, context, {\n\t\t\t\t...options,\n\t\t\t\tapiKey: auth.apiKey,\n\t\t\t\ttimeoutMs: options?.timeoutMs ?? providerRetrySettings.timeoutMs,\n\t\t\t\tmaxRetries: options?.maxRetries ?? providerRetrySettings.maxRetries,\n\t\t\t\tmaxRetryDelayMs: options?.maxRetryDelayMs ?? providerRetrySettings.maxRetryDelayMs,\n\t\t\t\theaders:\n\t\t\t\t\tattributionHeaders || auth.headers || options?.headers\n\t\t\t\t\t\t? { ...attributionHeaders, ...auth.headers, ...options?.headers }\n\t\t\t\t\t\t: undefined,\n\t\t\t});\n\t\t},\n\t\tonPayload: async (payload, _model) => {\n\t\t\tconst runner = extensionRunnerRef.current;\n\t\t\tif (!runner?.hasHandlers(\"before_provider_request\")) {\n\t\t\t\treturn payload;\n\t\t\t}\n\t\t\treturn runner.emitBeforeProviderRequest(payload);\n\t\t},\n\t\tonResponse: async (response, _model) => {\n\t\t\tconst runner = extensionRunnerRef.current;\n\t\t\tif (!runner?.hasHandlers(\"after_provider_response\")) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tawait runner.emit({\n\t\t\t\ttype: \"after_provider_response\",\n\t\t\t\tstatus: response.status,\n\t\t\t\theaders: response.headers,\n\t\t\t});\n\t\t},\n\t\tsessionId: sessionManager.getSessionId(),\n\t\ttransformContext: async (messages) => {\n\t\t\tconst runner = extensionRunnerRef.current;\n\t\t\tif (!runner) return messages;\n\t\t\treturn runner.emitContext(messages);\n\t\t},\n\t\tsteeringMode: settingsManager.getSteeringMode(),\n\t\tfollowUpMode: settingsManager.getFollowUpMode(),\n\t\ttransport: settingsManager.getTransport(),\n\t\tthinkingBudgets: settingsManager.getThinkingBudgets(),\n\t\tmaxRetryDelayMs: settingsManager.getProviderRetrySettings().maxRetryDelayMs,\n\t});\n\n\t// Restore messages if session has existing data\n\tif (hasExistingSession) {\n\t\tagent.state.messages = existingSession.messages;\n\t\tif (!hasThinkingEntry) {\n\t\t\tsessionManager.appendThinkingLevelChange(thinkingLevel);\n\t\t}\n\t} else {\n\t\t// Save initial model and thinking level for new sessions so they can be restored on resume\n\t\tif (model) {\n\t\t\tsessionManager.appendModelChange(model.provider, model.id);\n\t\t}\n\t\tsessionManager.appendThinkingLevelChange(thinkingLevel);\n\t}\n\n\tconst session = new AgentSession({\n\t\tagent,\n\t\tsessionManager,\n\t\tsettingsManager,\n\t\tcwd,\n\t\tscopedModels: options.scopedModels,\n\t\tresourceLoader,\n\t\tcustomTools: options.customTools,\n\t\tmodelRegistry,\n\t\tinitialActiveToolNames,\n\t\tallowedToolNames,\n\t\textensionRunnerRef,\n\t\tsessionStartEvent: options.sessionStartEvent,\n\t});\n\tconst extensionsResult = resourceLoader.getExtensions();\n\n\treturn {\n\t\tsession,\n\t\textensionsResult,\n\t\tmodelFallbackMessage,\n\t};\n}\n"]}