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// biome-ignore-all assist/source/organizeImports: ANT-ONLY import markers must not be reordered
import { feature } from 'bun:bundle'
import { readFile, stat } from 'fs/promises'
import { dirname } from 'path'
import {
downloadUserSettings,
redownloadUserSettings,
} from 'src/services/settingsSync/index.js'
import { waitForRemoteManagedSettingsToLoad } from 'src/services/remoteManagedSettings/index.js'
import { StructuredIO } from 'src/cli/structuredIO.js'
import { RemoteIO } from 'src/cli/remoteIO.js'
import {
type Command,
formatDescriptionWithSource,
getCommandName,
} from 'src/commands.js'
import { createStreamlinedTransformer } from 'src/utils/streamlinedTransform.js'
import { installStreamJsonStdoutGuard } from 'src/utils/streamJsonStdoutGuard.js'
import type { ToolPermissionContext } from 'src/Tool.js'
import type { ThinkingConfig } from 'src/utils/thinking.js'
import { assembleToolPool, filterToolsByDenyRules } from 'src/tools.js'
import uniqBy from 'lodash-es/uniqBy.js'
import { uniq } from 'src/utils/array.js'
import { mergeAndFilterTools } from 'src/utils/toolPool.js'
import {
logEvent,
type AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
} from 'src/services/analytics/index.js'
import { getFeatureValue_CACHED_MAY_BE_STALE } from 'src/services/analytics/growthbook.js'
import { logForDebugging } from 'src/utils/debug.js'
import {
logForDiagnosticsNoPII,
withDiagnosticsTiming,
} from 'src/utils/diagLogs.js'
import { toolMatchesName, type Tool, type Tools } from 'src/Tool.js'
import {
type AgentDefinition,
isBuiltInAgent,
parseAgentsFromJson,
} from 'src/tools/AgentTool/loadAgentsDir.js'
import type { Message, NormalizedUserMessage } from 'src/types/message.js'
import type { QueuedCommand } from 'src/types/textInputTypes.js'
import {
dequeue,
dequeueAllMatching,
enqueue,
hasCommandsInQueue,
peek,
subscribeToCommandQueue,
getCommandsByMaxPriority,
} from 'src/utils/messageQueueManager.js'
import { notifyCommandLifecycle } from 'src/utils/commandLifecycle.js'
import {
getSessionState,
notifySessionStateChanged,
notifySessionMetadataChanged,
setPermissionModeChangedListener,
type RequiresActionDetails,
type SessionExternalMetadata,
} from 'src/utils/sessionState.js'
import { externalMetadataToAppState } from 'src/state/onChangeAppState.js'
import { getInMemoryErrors, logError, logMCPDebug } from 'src/utils/log.js'
import {
writeToStdout,
registerProcessOutputErrorHandlers,
} from 'src/utils/process.js'
import type { Stream } from 'src/utils/stream.js'
import { EMPTY_USAGE } from 'src/services/api/logging.js'
import {
loadConversationForResume,
type TurnInterruptionState,
} from 'src/utils/conversationRecovery.js'
import type {
MCPServerConnection,
McpSdkServerConfig,
ScopedMcpServerConfig,
} from 'src/services/mcp/types.js'
import {
ChannelMessageNotificationSchema,
gateChannelServer,
wrapChannelMessage,
findChannelEntry,
} from 'src/services/mcp/channelNotification.js'
import {
isChannelAllowlisted,
isChannelsEnabled,
} from 'src/services/mcp/channelAllowlist.js'
import { parsePluginIdentifier } from 'src/utils/plugins/pluginIdentifier.js'
import { validateUuid } from 'src/utils/uuid.js'
import { fromArray } from 'src/utils/generators.js'
import { ask } from 'src/QueryEngine.js'
import type { PermissionPromptTool } from 'src/utils/queryHelpers.js'
import {
createFileStateCacheWithSizeLimit,
mergeFileStateCaches,
READ_FILE_STATE_CACHE_SIZE,
} from 'src/utils/fileStateCache.js'
import { expandPath } from 'src/utils/path.js'
import { extractReadFilesFromMessages } from 'src/utils/queryHelpers.js'
import { registerHookEventHandler } from 'src/utils/hooks/hookEvents.js'
import { executeFilePersistence } from 'src/utils/filePersistence/filePersistence.js'
import { finalizePendingAsyncHooks } from 'src/utils/hooks/AsyncHookRegistry.js'
import {
gracefulShutdown,
gracefulShutdownSync,
isShuttingDown,
} from 'src/utils/gracefulShutdown.js'
import { registerCleanup } from 'src/utils/cleanupRegistry.js'
import { createIdleTimeoutManager } from 'src/utils/idleTimeout.js'
import type {
SDKStatus,
ModelInfo,
SDKMessage,
SDKUserMessage,
SDKUserMessageReplay,
PermissionResult,
McpServerConfigForProcessTransport,
McpServerStatus,
RewindFilesResult,
} from 'src/entrypoints/agentSdkTypes.js'
import type {
StdoutMessage,
SDKControlInitializeRequest,
SDKControlInitializeResponse,
SDKControlRequest,
SDKControlResponse,
SDKControlMcpSetServersResponse,
SDKControlReloadPluginsResponse,
} from 'src/entrypoints/sdk/controlTypes.js'
import type { PermissionMode } from '@anthropic-ai/claude-agent-sdk'
import type { PermissionMode as InternalPermissionMode } from 'src/types/permissions.js'
import { cwd } from 'process'
import { getCwd } from 'src/utils/cwd.js'
import omit from 'lodash-es/omit.js'
import reject from 'lodash-es/reject.js'
import { isPolicyAllowed } from 'src/services/policyLimits/index.js'
import type { ReplBridgeHandle } from 'src/bridge/replBridge.js'
import { getRemoteSessionUrl } from 'src/constants/product.js'
import { buildBridgeConnectUrl } from 'src/bridge/bridgeStatusUtil.js'
import { extractInboundMessageFields } from 'src/bridge/inboundMessages.js'
import { resolveAndPrepend } from 'src/bridge/inboundAttachments.js'
import type { CanUseToolFn } from 'src/hooks/useCanUseTool.js'
import { hasPermissionsToUseTool } from 'src/utils/permissions/permissions.js'
import { safeParseJSON } from 'src/utils/json.js'
import {
outputSchema as permissionToolOutputSchema,
permissionPromptToolResultToPermissionDecision,
} from 'src/utils/permissions/PermissionPromptToolResultSchema.js'
import { createAbortController } from 'src/utils/abortController.js'
import { createCombinedAbortSignal } from 'src/utils/combinedAbortSignal.js'
import { generateSessionTitle } from 'src/utils/sessionTitle.js'
import { buildSideQuestionFallbackParams } from 'src/utils/queryContext.js'
import { runSideQuestion } from 'src/utils/sideQuestion.js'
import {
processSessionStartHooks,
processSetupHooks,
takeInitialUserMessage,
} from 'src/utils/sessionStart.js'
import {
DEFAULT_OUTPUT_STYLE_NAME,
getAllOutputStyles,
} from 'src/constants/outputStyles.js'
import { TEAMMATE_MESSAGE_TAG, TICK_TAG } from 'src/constants/xml.js'
import {
getSettings_DEPRECATED,
getSettingsWithSources,
} from 'src/utils/settings/settings.js'
import { settingsChangeDetector } from 'src/utils/settings/changeDetector.js'
import { applySettingsChange } from 'src/utils/settings/applySettingsChange.js'
import {
isFastModeAvailable,
isFastModeEnabled,
isFastModeSupportedByModel,
getFastModeState,
} from 'src/utils/fastMode.js'
import {
isAutoModeGateEnabled,
getAutoModeUnavailableNotification,
getAutoModeUnavailableReason,
isBypassPermissionsModeDisabled,
transitionPermissionMode,
} from 'src/utils/permissions/permissionSetup.js'
import {
tryGenerateSuggestion,
logSuggestionOutcome,
logSuggestionSuppressed,
type PromptVariant,
} from 'src/services/PromptSuggestion/promptSuggestion.js'
import { getLastCacheSafeParams } from 'src/utils/forkedAgent.js'
import { getAccountInformation } from 'src/utils/auth.js'
import { OAuthService } from 'src/services/oauth/index.js'
import { installOAuthTokens } from 'src/cli/handlers/auth.js'
import { getAPIProvider } from 'src/utils/model/providers.js'
import type { HookCallbackMatcher } from 'src/types/hooks.js'
import { AwsAuthStatusManager } from 'src/utils/awsAuthStatusManager.js'
import type { HookEvent } from 'src/entrypoints/agentSdkTypes.js'
import {
registerHookCallbacks,
setInitJsonSchema,
getInitJsonSchema,
setSdkAgentProgressSummariesEnabled,
} from 'src/bootstrap/state.js'
import { createSyntheticOutputTool } from 'src/tools/SyntheticOutputTool/SyntheticOutputTool.js'
import { parseSessionIdentifier } from 'src/utils/sessionUrl.js'
import {
hydrateRemoteSession,
hydrateFromCCRv2InternalEvents,
resetSessionFilePointer,
doesMessageExistInSession,
findUnresolvedToolUse,
recordAttributionSnapshot,
saveAgentSetting,
saveMode,
saveAiGeneratedTitle,
restoreSessionMetadata,
} from 'src/utils/sessionStorage.js'
import { incrementPromptCount } from 'src/utils/commitAttribution.js'
import {
setupSdkMcpClients,
connectToServer,
clearServerCache,
fetchToolsForClient,
areMcpConfigsEqual,
reconnectMcpServerImpl,
} from 'src/services/mcp/client.js'
import {
filterMcpServersByPolicy,
getMcpConfigByName,
isMcpServerDisabled,
setMcpServerEnabled,
} from 'src/services/mcp/config.js'
import {
performMCPOAuthFlow,
revokeServerTokens,
} from 'src/services/mcp/auth.js'
import {
runElicitationHooks,
runElicitationResultHooks,
} from 'src/services/mcp/elicitationHandler.js'
import { executeNotificationHooks } from 'src/utils/hooks.js'
import {
ElicitRequestSchema,
ElicitationCompleteNotificationSchema,
} from '@modelcontextprotocol/sdk/types.js'
import { getMcpPrefix } from 'src/services/mcp/mcpStringUtils.js'
import {
commandBelongsToServer,
filterToolsByServer,
} from 'src/services/mcp/utils.js'
import { setupVscodeSdkMcp } from 'src/services/mcp/vscodeSdkMcp.js'
import { getAllMcpConfigs } from 'src/services/mcp/config.js'
import {
isQualifiedForGrove,
checkGroveForNonInteractive,
} from 'src/services/api/grove.js'
import {
toInternalMessages,
toSDKRateLimitInfo,
} from 'src/utils/messages/mappers.js'
import { createModelSwitchBreadcrumbs } from 'src/utils/messages.js'
import { collectContextData } from 'src/commands/context/context-noninteractive.js'
import { LOCAL_COMMAND_STDOUT_TAG } from 'src/constants/xml.js'
import {
statusListeners,
type ClaudeAILimits,
} from 'src/services/claudeAiLimits.js'
import {
getDefaultMainLoopModel,
getMainLoopModel,
modelDisplayString,
parseUserSpecifiedModel,
} from 'src/utils/model/model.js'
import { getModelOptions } from 'src/utils/model/modelOptions.js'
import {
modelSupportsEffort,
modelSupportsMaxEffort,
EFFORT_LEVELS,
resolveAppliedEffort,
} from 'src/utils/effort.js'
import { modelSupportsAdaptiveThinking } from 'src/utils/thinking.js'
import { modelSupportsAutoMode } from 'src/utils/betas.js'
import { ensureModelStringsInitialized } from 'src/utils/model/modelStrings.js'
import {
getSessionId,
setMainLoopModelOverride,
setMainThreadAgentType,
switchSession,
isSessionPersistenceDisabled,
getIsRemoteMode,
getFlagSettingsInline,
setFlagSettingsInline,
getMainThreadAgentType,
getAllowedChannels,
setAllowedChannels,
type ChannelEntry,
} from 'src/bootstrap/state.js'
import { runWithWorkload, WORKLOAD_CRON } from 'src/utils/workloadContext.js'
import type { UUID } from 'crypto'
import { randomUUID } from 'crypto'
import type { ContentBlockParam } from '@anthropic-ai/sdk/resources/messages.mjs'
import type { AppState } from 'src/state/AppStateStore.js'
import {
fileHistoryRewind,
fileHistoryCanRestore,
fileHistoryEnabled,
fileHistoryGetDiffStats,
} from 'src/utils/fileHistory.js'
import {
restoreAgentFromSession,
restoreSessionStateFromLog,
} from 'src/utils/sessionRestore.js'
import { SandboxManager } from 'src/utils/sandbox/sandbox-adapter.js'
import {
headlessProfilerStartTurn,
headlessProfilerCheckpoint,
logHeadlessProfilerTurn,
} from 'src/utils/headlessProfiler.js'
import {
startQueryProfile,
logQueryProfileReport,
} from 'src/utils/queryProfiler.js'
import { asSessionId } from 'src/types/ids.js'
import { jsonStringify } from '../utils/slowOperations.js'
import { skillChangeDetector } from '../utils/skills/skillChangeDetector.js'
import { getCommands, clearCommandsCache } from '../commands.js'
import {
isBareMode,
isEnvTruthy,
isEnvDefinedFalsy,
} from '../utils/envUtils.js'
import { installPluginsForHeadless } from '../utils/plugins/headlessPluginInstall.js'
import { refreshActivePlugins } from '../utils/plugins/refresh.js'
import { loadAllPluginsCacheOnly } from '../utils/plugins/pluginLoader.js'
import {
isTeamLead,
hasActiveInProcessTeammates,
hasWorkingInProcessTeammates,
waitForTeammatesToBecomeIdle,
} from '../utils/teammate.js'
import {
readUnreadMessages,
markMessagesAsRead,
isShutdownApproved,
} from '../utils/teammateMailbox.js'
import { removeTeammateFromTeamFile } from '../utils/swarm/teamHelpers.js'
import { unassignTeammateTasks } from '../utils/tasks.js'
import { getRunningTasks } from '../utils/task/framework.js'
import { isBackgroundTask } from '../tasks/types.js'
import { stopTask } from '../tasks/stopTask.js'
import { drainSdkEvents } from '../utils/sdkEventQueue.js'
import { initializeGrowthBook } from '../services/analytics/growthbook.js'
import { errorMessage, toError } from '../utils/errors.js'
import { sleep } from '../utils/sleep.js'
import { isExtractModeActive } from '../memdir/paths.js'
// Dead code elimination: conditional imports
/* eslint-disable @typescript-eslint/no-require-imports */
const coordinatorModeModule = feature('COORDINATOR_MODE')
? (require('../coordinator/coordinatorMode.js') as typeof import('../coordinator/coordinatorMode.js'))
: null
const proactiveModule =
feature('PROACTIVE') || feature('KAIROS')
? (require('../proactive/index.js') as typeof import('../proactive/index.js'))
: null
const cronSchedulerModule = feature('AGENT_TRIGGERS')
? (require('../utils/cronScheduler.js') as typeof import('../utils/cronScheduler.js'))
: null
const cronJitterConfigModule = feature('AGENT_TRIGGERS')
? (require('../utils/cronJitterConfig.js') as typeof import('../utils/cronJitterConfig.js'))
: null
const cronGate = feature('AGENT_TRIGGERS')
? (require('../tools/ScheduleCronTool/prompt.js') as typeof import('../tools/ScheduleCronTool/prompt.js'))
: null
const extractMemoriesModule = feature('EXTRACT_MEMORIES')
? (require('../services/extractMemories/extractMemories.js') as typeof import('../services/extractMemories/extractMemories.js'))
: null
/* eslint-enable @typescript-eslint/no-require-imports */
const SHUTDOWN_TEAM_PROMPT = `<system-reminder>
You are running in non-interactive mode and cannot return a response to the user until your team is shut down.
You MUST shut down your team before preparing your final response:
1. Use requestShutdown to ask each team member to shut down gracefully
2. Wait for shutdown approvals
3. Use the cleanup operation to clean up the team
4. Only then provide your final response to the user
The user cannot receive your response until the team is completely shut down.
</system-reminder>
Shut down your team and prepare your final response for the user.`
// Track message UUIDs received during the current session runtime
const MAX_RECEIVED_UUIDS = 10_000
const receivedMessageUuids = new Set<UUID>()
const receivedMessageUuidsOrder: UUID[] = []
function trackReceivedMessageUuid(uuid: UUID): boolean {
if (receivedMessageUuids.has(uuid)) {
return false // duplicate
}
receivedMessageUuids.add(uuid)
receivedMessageUuidsOrder.push(uuid)
// Evict oldest entries when at capacity
if (receivedMessageUuidsOrder.length > MAX_RECEIVED_UUIDS) {
const toEvict = receivedMessageUuidsOrder.splice(
0,
receivedMessageUuidsOrder.length - MAX_RECEIVED_UUIDS,
)
for (const old of toEvict) {
receivedMessageUuids.delete(old)
}
}
return true // new UUID
}
type PromptValue = string | ContentBlockParam[]
function toBlocks(v: PromptValue): ContentBlockParam[] {
return typeof v === 'string' ? [{ type: 'text', text: v }] : v
}
/**
* Join prompt values from multiple queued commands into one. Strings are
* newline-joined; if any value is a block array, all values are normalized
* to blocks and concatenated.
*/
export function joinPromptValues(values: PromptValue[]): PromptValue {
if (values.length === 1) return values[0]!
if (values.every(v => typeof v === 'string')) {
return values.join('\n')
}
return values.flatMap(toBlocks)
}
/**
* Whether `next` can be batched into the same ask() call as `head`. Only
* prompt-mode commands batch, and only when the workload tag matches (so the
* combined turn is attributed correctly) and the isMeta flag matches (so a
* proactive tick can't merge into a user prompt and lose its hidden-in-
* transcript marking when the head is spread over the merged command).
*/
export function canBatchWith(
head: QueuedCommand,
next: QueuedCommand | undefined,
): boolean {
return (
next !== undefined &&
next.mode === 'prompt' &&
next.workload === head.workload &&
next.isMeta === head.isMeta
)
}
export async function runHeadless(
inputPrompt: string | AsyncIterable<string>,
getAppState: () => AppState,
setAppState: (f: (prev: AppState) => AppState) => void,
commands: Command[],
tools: Tools,
sdkMcpConfigs: Record<string, McpSdkServerConfig>,
agents: AgentDefinition[],
options: {
continue: boolean | undefined
resume: string | boolean | undefined
resumeSessionAt: string | undefined
verbose: boolean | undefined
outputFormat: string | undefined
jsonSchema: Record<string, unknown> | undefined
permissionPromptToolName: string | undefined
allowedTools: string[] | undefined
thinkingConfig: ThinkingConfig | undefined
maxTurns: number | undefined
maxBudgetUsd: number | undefined
taskBudget: { total: number } | undefined
systemPrompt: string | undefined
appendSystemPrompt: string | undefined
userSpecifiedModel: string | undefined
fallbackModel: string | undefined
teleport: string | true | null | undefined
sdkUrl: string | undefined
replayUserMessages: boolean | undefined
includePartialMessages: boolean | undefined
forkSession: boolean | undefined
rewindFiles: string | undefined
enableAuthStatus: boolean | undefined
agent: string | undefined
workload: string | undefined
setupTrigger?: 'init' | 'maintenance' | undefined
sessionStartHooksPromise?: ReturnType<typeof processSessionStartHooks>
setSDKStatus?: (status: SDKStatus) => void
},
): Promise<void> {
if (
process.env.USER_TYPE === 'ant' &&
isEnvTruthy(process.env.CLAUDE_CODE_EXIT_AFTER_FIRST_RENDER)
) {
process.stderr.write(
`\nStartup time: ${Math.round(process.uptime() * 1000)}ms\n`,
)
// eslint-disable-next-line custom-rules/no-process-exit
process.exit(0)
}
// Fire user settings download now so it overlaps with the MCP/tool setup
// below. Managed settings already started in main.tsx preAction; this gives
// user settings a similar head start. The cached promise is joined in
// installPluginsAndApplyMcpInBackground before plugin install reads
// enabledPlugins.
if (
feature('DOWNLOAD_USER_SETTINGS') &&
(isEnvTruthy(process.env.CLAUDE_CODE_REMOTE) || getIsRemoteMode())
) {
void downloadUserSettings()
}
// In headless mode there is no React tree, so the useSettingsChange hook
// never runs. Subscribe directly so that settings changes (including
// managed-settings / policy updates) are fully applied.
settingsChangeDetector.subscribe(source => {
applySettingsChange(source, setAppState)
// In headless mode, also sync the denormalized fastMode field from
// settings. The TUI manages fastMode via the UI so it skips this.
if (isFastModeEnabled()) {
setAppState(prev => {
const s = prev.settings as Record<string, unknown>
const fastMode = s.fastMode === true && !s.fastModePerSessionOptIn
return { ...prev, fastMode }
})
}
})
// Proactive activation is now handled in main.tsx before getTools() so
// SleepTool passes isEnabled() filtering. This fallback covers the case
// where CLAUDE_CODE_PROACTIVE is set but main.tsx's check didn't fire
// (e.g. env was injected by the SDK transport after argv parsing).
if (
(feature('PROACTIVE') || feature('KAIROS')) &&
proactiveModule &&
!proactiveModule.isProactiveActive() &&
isEnvTruthy(process.env.CLAUDE_CODE_PROACTIVE)
) {
proactiveModule.activateProactive('command')
}
// Periodically force a full GC to keep memory usage in check
if (typeof Bun !== 'undefined') {
const gcTimer = setInterval(Bun.gc, 1000)
gcTimer.unref()
}
// Start headless profiler for first turn
headlessProfilerStartTurn()
headlessProfilerCheckpoint('runHeadless_entry')
// Check Grove requirements for non-interactive consumer subscribers
if (await isQualifiedForGrove()) {
await checkGroveForNonInteractive()
}
headlessProfilerCheckpoint('after_grove_check')
// Initialize GrowthBook so feature flags take effect in headless mode.
// Without this, the disk cache is empty and all flags fall back to defaults.
void initializeGrowthBook()
if (options.resumeSessionAt && !options.resume) {
process.stderr.write(`Error: --resume-session-at requires --resume\n`)
gracefulShutdownSync(1)
return
}
if (options.rewindFiles && !options.resume) {
process.stderr.write(`Error: --rewind-files requires --resume\n`)
gracefulShutdownSync(1)
return
}
if (options.rewindFiles && inputPrompt) {
process.stderr.write(
`Error: --rewind-files is a standalone operation and cannot be used with a prompt\n`,
)
gracefulShutdownSync(1)
return
}
const structuredIO = getStructuredIO(inputPrompt, options)
// When emitting NDJSON for SDK clients, any stray write to stdout (debug
// prints, dependency console.log, library banners) breaks the client's
// line-by-line JSON parser. Install a guard that diverts non-JSON lines to
// stderr so the stream stays clean. Must run before the first
// structuredIO.write below.
if (options.outputFormat === 'stream-json') {
installStreamJsonStdoutGuard()
}
// #34044: if user explicitly set sandbox.enabled=true but deps are missing,
// isSandboxingEnabled() returns false silently. Surface the reason so users
// know their security config isn't being enforced.
const sandboxUnavailableReason = SandboxManager.getSandboxUnavailableReason()
if (sandboxUnavailableReason) {
if (SandboxManager.isSandboxRequired()) {
process.stderr.write(
`\nError: sandbox required but unavailable: ${sandboxUnavailableReason}\n` +
` sandbox.failIfUnavailable is set — refusing to start without a working sandbox.\n\n`,
)
gracefulShutdownSync(1)
return
}
process.stderr.write(
`\n⚠ Sandbox disabled: ${sandboxUnavailableReason}\n` +
` Commands will run WITHOUT sandboxing. Network and filesystem restrictions will NOT be enforced.\n\n`,
)
} else if (SandboxManager.isSandboxingEnabled()) {
// Initialize sandbox with a callback that forwards network permission
// requests to the SDK host via the can_use_tool control_request protocol.
// This must happen after structuredIO is created so we can send requests.
try {
await SandboxManager.initialize(structuredIO.createSandboxAskCallback())
} catch (err) {
process.stderr.write(`\n❌ Sandbox Error: ${errorMessage(err)}\n`)
gracefulShutdownSync(1, 'other')
return
}
}
if (options.outputFormat === 'stream-json' && options.verbose) {
registerHookEventHandler(event => {
const message: StdoutMessage = (() => {
switch (event.type) {
case 'started':
return {
type: 'system' as const,
subtype: 'hook_started' as const,
hook_id: event.hookId,
hook_name: event.hookName,
hook_event: event.hookEvent,
uuid: randomUUID(),
session_id: getSessionId(),
}
case 'progress':
return {
type: 'system' as const,
subtype: 'hook_progress' as const,
hook_id: event.hookId,
hook_name: event.hookName,
hook_event: event.hookEvent,
stdout: event.stdout,
stderr: event.stderr,
output: event.output,
uuid: randomUUID(),
session_id: getSessionId(),
}
case 'response':
return {
type: 'system' as const,
subtype: 'hook_response' as const,
hook_id: event.hookId,
hook_name: event.hookName,
hook_event: event.hookEvent,
output: event.output,
stdout: event.stdout,
stderr: event.stderr,
exit_code: event.exitCode,
outcome: event.outcome,
uuid: randomUUID(),
session_id: getSessionId(),
}
}
})()
void structuredIO.write(message)
})
}
if (options.setupTrigger) {
await processSetupHooks(options.setupTrigger)
}
headlessProfilerCheckpoint('before_loadInitialMessages')
const appState = getAppState()
const {
messages: initialMessages,
turnInterruptionState,
agentSetting: resumedAgentSetting,
} = await loadInitialMessages(setAppState, {
continue: options.continue,
teleport: options.teleport,
resume: options.resume,
resumeSessionAt: options.resumeSessionAt,
forkSession: options.forkSession,
outputFormat: options.outputFormat,
sessionStartHooksPromise: options.sessionStartHooksPromise,
restoredWorkerState: structuredIO.restoredWorkerState,
})
// SessionStart hooks can emit initialUserMessage — the first user turn for
// headless orchestrator sessions where stdin is empty and additionalContext
// alone (an attachment, not a turn) would leave the REPL with nothing to
// respond to. The hook promise is awaited inside loadInitialMessages, so the
// module-level pending value is set by the time we get here.
const hookInitialUserMessage = takeInitialUserMessage()
if (hookInitialUserMessage) {
structuredIO.prependUserMessage(hookInitialUserMessage)
}
// Restore agent setting from the resumed session (if not overridden by current --agent flag
// or settings-based agent, which would already have set mainThreadAgentType in main.tsx)
if (!options.agent && !getMainThreadAgentType() && resumedAgentSetting) {
const { agentDefinition: restoredAgent } = restoreAgentFromSession(
resumedAgentSetting,
undefined,
{ activeAgents: agents, allAgents: agents },
)
if (restoredAgent) {
setAppState(prev => ({ ...prev, agent: restoredAgent.agentType }))
// Apply the agent's system prompt for non-built-in agents (mirrors main.tsx initial --agent path)
if (!options.systemPrompt && !isBuiltInAgent(restoredAgent)) {
const agentSystemPrompt = restoredAgent.getSystemPrompt()
if (agentSystemPrompt) {
options.systemPrompt = agentSystemPrompt
}
}
// Re-persist agent setting so future resumes maintain the agent
saveAgentSetting(restoredAgent.agentType)
}
}
// gracefulShutdownSync schedules an async shutdown and sets process.exitCode.
// If a loadInitialMessages error path triggered it, bail early to avoid
// unnecessary work while the process winds down.
if (initialMessages.length === 0 && process.exitCode !== undefined) {
return
}
// Handle --rewind-files: restore filesystem and exit immediately
if (options.rewindFiles) {
// File history snapshots are only created for user messages,
// so we require the target to be a user message
const targetMessage = initialMessages.find(
m => m.uuid === options.rewindFiles,
)
if (!targetMessage || targetMessage.type !== 'user') {
process.stderr.write(
`Error: --rewind-files requires a user message UUID, but ${options.rewindFiles} is not a user message in this session\n`,
)
gracefulShutdownSync(1)
return
}
const currentAppState = getAppState()
const result = await handleRewindFiles(
options.rewindFiles as UUID,
currentAppState,
setAppState,
false,
)
if (!result.canRewind) {
process.stderr.write(`Error: ${result.error || 'Unexpected error'}\n`)
gracefulShutdownSync(1)
return
}
// Rewind complete - exit successfully
process.stdout.write(
`Files rewound to state at message ${options.rewindFiles}\n`,
)
gracefulShutdownSync(0)
return
}
// Check if we need input prompt - skip if we're resuming with a valid session ID/JSONL file or using SDK URL
const hasValidResumeSessionId =
typeof options.resume === 'string' &&
(Boolean(validateUuid(options.resume)) || options.resume.endsWith('.jsonl'))
const isUsingSdkUrl = Boolean(options.sdkUrl)
if (!inputPrompt && !hasValidResumeSessionId && !isUsingSdkUrl) {
process.stderr.write(
`Error: Input must be provided either through stdin or as a prompt argument when using --print\n`,
)
gracefulShutdownSync(1)
return
}
if (options.outputFormat === 'stream-json' && !options.verbose) {
process.stderr.write(
'Error: When using --print, --output-format=stream-json requires --verbose\n',
)
gracefulShutdownSync(1)
return
}
// Filter out MCP tools that are in the deny list
const allowedMcpTools = filterToolsByDenyRules(
appState.mcp.tools,
appState.toolPermissionContext,
)
let filteredTools = [...tools, ...allowedMcpTools]
// When using SDK URL, always use stdio permission prompting to delegate to the SDK
const effectivePermissionPromptToolName = options.sdkUrl
? 'stdio'
: options.permissionPromptToolName
// Callback for when a permission prompt is shown
const onPermissionPrompt = (details: RequiresActionDetails) => {
if (feature('COMMIT_ATTRIBUTION')) {
setAppState(prev => ({
...prev,
attribution: {
...prev.attribution,
permissionPromptCount: prev.attribution.permissionPromptCount + 1,
},
}))
}
notifySessionStateChanged('requires_action', details)
}
const canUseTool = getCanUseToolFn(
effectivePermissionPromptToolName,
structuredIO,
() => getAppState().mcp.tools,
onPermissionPrompt,
)
if (options.permissionPromptToolName) {
// Remove the permission prompt tool from the list of available tools.
filteredTools = filteredTools.filter(
tool => !toolMatchesName(tool, options.permissionPromptToolName!),
)
}
// Install errors handlers to gracefully handle broken pipes (e.g., when parent process dies)
registerProcessOutputErrorHandlers()
headlessProfilerCheckpoint('after_loadInitialMessages')
// Ensure model strings are initialized before generating model options.
// For Bedrock users, this waits for the profile fetch to get correct region strings.
await ensureModelStringsInitialized()
headlessProfilerCheckpoint('after_modelStrings')
// UDS inbox store registration is deferred until after `run` is defined
// so we can pass `run` as the onEnqueue callback (see below).
// Only `json` + `verbose` needs the full array (jsonStringify(messages) below).
// For stream-json (SDK/CCR) and default text output, only the last message is
// read for the exit code / final result. Avoid accumulating every message in
// memory for the entire session.
const needsFullArray = options.outputFormat === 'json' && options.verbose
const messages: SDKMessage[] = []
let lastMessage: SDKMessage | undefined
// Streamlined mode transforms messages when CLAUDE_CODE_STREAMLINED_OUTPUT=true and using stream-json
// Build flag gates this out of external builds; env var is the runtime opt-in for ant builds
const transformToStreamlined =
feature('STREAMLINED_OUTPUT') &&
isEnvTruthy(process.env.CLAUDE_CODE_STREAMLINED_OUTPUT) &&
options.outputFormat === 'stream-json'
? createStreamlinedTransformer()
: null
headlessProfilerCheckpoint('before_runHeadlessStreaming')
for await (const message of runHeadlessStreaming(
structuredIO,
appState.mcp.clients,
[...commands, ...appState.mcp.commands],
filteredTools,
initialMessages,
canUseTool,
sdkMcpConfigs,
getAppState,
setAppState,
agents,
options,
turnInterruptionState,
)) {
if (transformToStreamlined) {
// Streamlined mode: transform messages and stream immediately
const transformed = transformToStreamlined(message)
if (transformed) {
await structuredIO.write(transformed)
}
} else if (options.outputFormat === 'stream-json' && options.verbose) {
await structuredIO.write(message)
}
// Should not be getting control messages or stream events in non-stream mode.
// Also filter out streamlined types since they're only produced by the transformer.
// SDK-only system events are excluded so lastMessage stays at the result
// (session_state_changed(idle) and any late task_notification drain after
// result in the finally block).
if (
message.type !== 'control_response' &&
message.type !== 'control_request' &&
message.type !== 'control_cancel_request' &&
!(
message.type === 'system' &&
(message.subtype === 'session_state_changed' ||
message.subtype === 'task_notification' ||
message.subtype === 'task_started' ||
message.subtype === 'task_progress' ||
message.subtype === 'post_turn_summary')
) &&
message.type !== 'stream_event' &&
message.type !== 'keep_alive' &&
message.type !== 'streamlined_text' &&
message.type !== 'streamlined_tool_use_summary' &&
message.type !== 'prompt_suggestion'
) {
if (needsFullArray) {
messages.push(message)
}
lastMessage = message
}
}
switch (options.outputFormat) {
case 'json':
if (!lastMessage || lastMessage.type !== 'result') {
throw new Error('No messages returned')
}
if (options.verbose) {
writeToStdout(jsonStringify(messages) + '\n')
break
}
writeToStdout(jsonStringify(lastMessage) + '\n')
break
case 'stream-json':
// already logged above
break
default:
if (!lastMessage || lastMessage.type !== 'result') {
throw new Error('No messages returned')
}
switch (lastMessage.subtype) {
case 'success':
writeToStdout(
lastMessage.result.endsWith('\n')
? lastMessage.result
: lastMessage.result + '\n',
)
break
case 'error_during_execution':
writeToStdout(`Execution error`)
break
case 'error_max_turns':
writeToStdout(`Error: Reached max turns (${options.maxTurns})`)
break
case 'error_max_budget_usd':
writeToStdout(`Error: Exceeded USD budget (${options.maxBudgetUsd})`)
break
case 'error_max_structured_output_retries':
writeToStdout(
`Error: Failed to provide valid structured output after maximum retries`,
)
}
}
// Log headless latency metrics for the final turn
logHeadlessProfilerTurn()
// Drain any in-flight memory extraction before shutdown. The response is
// already flushed above, so this adds no user-visible latency — it just
// delays process exit so gracefulShutdownSync's 5s failsafe doesn't kill
// the forked agent mid-flight. Gated by isExtractModeActive so the
// tengu_slate_thimble flag controls non-interactive extraction end-to-end.
if (feature('EXTRACT_MEMORIES') && isExtractModeActive()) {
await extractMemoriesModule!.drainPendingExtraction()
}
gracefulShutdownSync(
lastMessage?.type === 'result' && lastMessage?.is_error ? 1 : 0,
)
}
function runHeadlessStreaming(
structuredIO: StructuredIO,
mcpClients: MCPServerConnection[],
commands: Command[],
tools: Tools,
initialMessages: Message[],
canUseTool: CanUseToolFn,
sdkMcpConfigs: Record<string, McpSdkServerConfig>,
getAppState: () => AppState,
setAppState: (f: (prev: AppState) => AppState) => void,
agents: AgentDefinition[],
options: {
verbose: boolean | undefined
jsonSchema: Record<string, unknown> | undefined
permissionPromptToolName: string | undefined
allowedTools: string[] | undefined
thinkingConfig: ThinkingConfig | undefined
maxTurns: number | undefined
maxBudgetUsd: number | undefined
taskBudget: { total: number } | undefined
systemPrompt: string | undefined
appendSystemPrompt: string | undefined
userSpecifiedModel: string | undefined
fallbackModel: string | undefined
replayUserMessages?: boolean | undefined