Files
Codeman/src/session.ts
T
Codeman maintainer 683544a22e Merge master into PR #157 (session manager polish)
Resolutions (sse-events.ts / constants.js / app.js): unions of the docker/
multi-user event registrations from master with the session-order/pin events
from this branch.

Additions on top of the merge:
- POST /api/sessions/:id/pin now falls back to the persisted store record when
  no live session exists: COD-142 deliberately preserves pinned records after
  kill (and cleanupStaleSessions skips them), so without this a pinned-then-
  killed session could never be unpinned. Owner-scoped in multi-user mode.
- SessionOrderUpdateSchema bounds (id <= 100 chars, <= 500 entries) so a buggy
  client can't persist megabytes into state.json; empty strings still flow to
  normalizeSessionOrder which drops them.
- Route tests for the persisted-record pin fallback.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-20 14:31:44 +02:00

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/**
* @fileoverview Core PTY session wrapper for Claude CLI interactions.
*
* Manages a PTY (pseudo-terminal) process running Claude CLI or OpenCode CLI.
* Three operation modes:
* 1. **One-shot** (`runPrompt`): Single prompt → JSON response
* 2. **Interactive** (`startInteractive`): Persistent interactive session
* 3. **Shell** (`startShell`): Plain bash shell for debugging
*
* Optionally wraps in a tmux session for persistence across disconnects.
* Tracks tokens, costs, background tasks, and auto-compact/clear.
*
* Key exports:
* - `Session` class — main entity, extends EventEmitter
* - `ClaudeMessage` interface — parsed JSON messages from Claude output
* - `SessionEvents` interface — typed event map
*
* Key methods: `runPrompt()`, `startInteractive()`, `startShell()`,
* `writeViaMux()`, `toState()`, `stop()`, `resize()`, `isIdle()`,
* `setAutoCompact()`, `findTaskDescriptionNear()`, `getTerminalBuffer()`
*
* @dependencies session-cli-builder (args/env), session-auto-ops (auto-compact/clear),
* ralph-tracker (todo/completion parsing), bash-tool-parser (tool invocation tracking),
* task-tracker (background tasks), mux-interface (tmux abstraction)
* @consumedby session-manager, web/server, respawn-controller
* @emits session:terminal, session:idle, session:working, session:completion, session:exit
*
* @module session
*/
import { EventEmitter } from 'node:events';
import { execSync, execFileSync } from 'node:child_process';
import { v4 as uuidv4 } from 'uuid';
import * as pty from 'node-pty';
import {
SessionState,
SessionStatus,
SessionConfig,
RalphTrackerState,
RalphTodoItem,
ActiveBashTool,
NiceConfig,
DEFAULT_NICE_CONFIG,
getErrorMessage,
isEffortLevel,
type ClaudeMode,
type SessionMode,
type OpenCodeConfig,
type CodexConfig,
type EffortLevel,
type GeminiConfig,
type SessionRemote,
type SessionDocker,
} from './types.js';
import { probeDockerCliVersion } from './docker-hosts.js';
import type { TerminalMultiplexer, MuxSession } from './mux-interface.js';
import { TaskTracker, type BackgroundTask } from './task-tracker.js';
import { RalphTracker } from './ralph-tracker.js';
import { BashToolParser } from './bash-tool-parser.js';
import {
BufferAccumulator,
ANSI_ESCAPE_PATTERN_FULL,
TOKEN_PATTERN,
SPINNER_PATTERN,
MAX_SESSION_TOKENS,
execPattern,
getClaudeCliVersion,
} from './utils/index.js';
import {
MAX_TERMINAL_BUFFER_SIZE,
TRIM_TERMINAL_TO as TERMINAL_BUFFER_TRIM_SIZE,
MAX_TEXT_OUTPUT_SIZE,
TRIM_TEXT_TO as TEXT_OUTPUT_TRIM_SIZE,
MAX_MESSAGES,
MAX_LINE_BUFFER_SIZE,
} from './config/buffer-limits.js';
import { DEFAULT_TMUX_HISTORY_LIMIT } from './config/terminal-history.js';
import { EXEC_TIMEOUT_MS } from './config/exec-timeout.js';
import {
buildInteractiveArgs,
buildPromptArgs,
buildClaudeEnv,
buildMuxAttachEnv,
buildShellEnv,
} from './session-cli-builder.js';
import { SessionAutoOps } from './session-auto-ops.js';
import { detectUsageLimitPause } from './usage-limit-patterns.js';
import { SessionTaskCache } from './session-task-cache.js';
import { InteractivePtyExitBreaker } from './session-pty-exit-breaker.js';
import { parseTerminalAttachmentRequests } from './attachment-magic.js';
import {
sanitizeAttachmentHistory,
upsertAttachmentHistory as upsertAttachmentHistoryList,
} from './session-attachment-history.js';
import type { SessionAttachmentHistoryItem } from './types/session.js';
export type { BackgroundTask } from './task-tracker.js';
export type { RalphTrackerState, RalphTodoItem, ActiveBashTool } from './types.js';
export type ResizeViewportType = 'mobile' | 'tablet' | 'desktop';
/** Line buffer flush interval (100ms) - forces processing of partial lines */
const LINE_BUFFER_FLUSH_INTERVAL = 100;
// ============================================================================
// Timing Constants
// ============================================================================
/** Delay after mux session creation before sending commands (300ms) */
const MUX_STARTUP_DELAY_MS = 300;
/** Delay before declaring session idle after last output (2 seconds) */
const IDLE_DETECTION_DELAY_MS = 2000;
// Note: Auto-compact/clear timing constants moved to session-auto-ops.ts
/** Graceful shutdown delay when stopping session (100ms) */
const GRACEFUL_SHUTDOWN_DELAY_MS = 100;
// Filter out terminal focus escape sequences (focus in/out reports)
// ^[[I (focus in), ^[[O (focus out), and the enable/disable sequences
// eslint-disable-next-line no-control-regex
const FOCUS_ESCAPE_FILTER = /\x1b\[\?1004[hl]|\x1b\[[IO]/g;
// Pattern to match Task tool invocations in terminal output
// Matches: "Explore(Description)", "Task(Description)", "Bash(Description)", etc.
// The prefix characters vary (●, ·, ✶, etc.) so we don't require them
// We look for the tool name followed by (description)
const TASK_TOOL_PATTERN = /\b(Explore|Task|Bash|Plan|general-purpose)\(([^)]+)\)/g;
// Pre-compiled patterns for hot paths (avoid regex compilation per call)
/** Pattern to strip leading ANSI escapes and whitespace from terminal buffer */
// eslint-disable-next-line no-control-regex
const LEADING_ANSI_WHITESPACE_PATTERN = /^(\x1b\[\??[\d;]*[A-Za-z]|[\s\r\n])+/;
/** Pattern to match Ctrl+L (form feed) characters */
// eslint-disable-next-line no-control-regex
const CTRL_L_PATTERN = /\x0c/g;
/** Pattern to split by newlines (CR or LF) */
const NEWLINE_SPLIT_PATTERN = /\r?\n/;
/** True for external-CLI run modes (non-Claude) that use their own TUI and output format. */
export function isExternalCliMode(mode: SessionMode): boolean {
return mode === 'opencode' || mode === 'codex' || mode === 'gemini';
}
function getModeLabel(mode: SessionMode): string {
switch (mode) {
case 'opencode':
return 'OpenCode';
case 'codex':
return 'Codex';
case 'gemini':
return 'Gemini';
case 'shell':
return 'Shell';
case 'claude':
return 'Claude';
}
}
/**
* Modes whose TUI emits alt-screen / scrollback-erase / mouse-tracking sequences
* that we strip so the browser keeps everything in the main buffer with scrollback
* reachable (the strip runs on both the live stream and the buffer replay).
*
* Codex, Claude Code, and Gemini are known, controlled (Ink/React) TUIs that
* repaint via cursor positioning, so dropping the alt-screen switch is safe —
* content stays in the normal buffer. Excluded: `shell` (arbitrary programs like
* vim/less/htop legitimately need the alt screen) and `opencode` (renders its own
* TUI that may rely on it). Keep parity with the replay-side strip in
* session-routes.ts.
*/
export function isAltScreenStripMode(mode: SessionMode): boolean {
return mode === 'codex' || mode === 'claude' || mode === 'gemini';
}
// Note: Claude CLI PATH resolution moved to session-cli-builder.ts (buildClaudeEnv)
/** PTY fallback geometry when tmux can't be queried (matches pre-#80 hardcoded values). */
const DEFAULT_PTY_COLS = 120;
const DEFAULT_PTY_ROWS = 40;
const TMUX_DISPLAY_TIMEOUT_MS = 2000;
/** Delay before the in-container Claude CLI version probe (lets the container start). */
const DOCKER_CLI_VERSION_PROBE_DELAY_MS = 3000;
/**
* Ask tmux for the current window geometry of `muxName` so a re-attaching PTY
* client can spawn at the same size and avoid the resize-flicker / scrollback
* loss documented in #80. Returns `{ cols: 120, rows: 40 }` on any failure
* (tmux dead, muxName unknown, malformed output) — caller never has to
* differentiate "tmux unreachable" from "size 120x40".
*
* `socket` MUST be the same dedicated socket the session lives on (`mux.muxSocket`);
* querying the default server would never find the session and silently fall back.
*
* Argv form (execFileSync, not execSync) keeps `muxName` out of any shell so
* a hostile session name can't inject options.
*/
export function queryTmuxWindowSize(muxName: string, socket: string): { cols: number; rows: number } {
try {
const sizeStr = execFileSync(
'tmux',
['-L', socket, 'display', '-t', muxName, '-p', '#{window_width} #{window_height}'],
{
timeout: TMUX_DISPLAY_TIMEOUT_MS,
encoding: 'utf8',
}
).trim();
const [w, h] = sizeStr.split(' ').map(Number);
if (w > 0 && h > 0) {
return { cols: w, rows: h };
}
} catch {
/* fall back below */
}
return { cols: DEFAULT_PTY_COLS, rows: DEFAULT_PTY_ROWS };
}
export function resolveMuxAttachCwd(workingDir: string, remote?: SessionRemote, docker?: SessionDocker): string {
// Remote and docker sessions run the CLI elsewhere (ssh / docker exec); the LOCAL
// wrapper pane never needs the workspace as its cwd, so launch it in /tmp.
return remote || docker ? '/tmp' : workingDir;
}
/**
* Represents a JSON message from Claude CLI's stream-json output format.
* Messages are newline-delimited JSON objects parsed from PTY output.
*/
export interface ClaudeMessage {
/** Message type indicating the role or purpose */
type: 'system' | 'assistant' | 'user' | 'result';
/** Optional subtype for further classification */
subtype?: string;
/** Claude's internal session identifier */
session_id?: string;
/** Message content with optional token usage */
message?: {
content: Array<{ type: string; text?: string }>;
usage?: {
input_tokens: number;
output_tokens: number;
};
};
/** Final result text (on result messages) */
result?: string;
/** Whether this message represents an error */
is_error?: boolean;
/** Total cost in USD (on result messages) */
total_cost_usd?: number;
/** Total duration in milliseconds (on result messages) */
duration_ms?: number;
}
/**
* Event signatures emitted by the Session class.
* Subscribe using `session.on('eventName', handler)`.
*/
/**
* Core session class that wraps a PTY process running Claude CLI or a shell.
*
* @example
* ```typescript
* // Create and start an interactive Claude session
* const session = new Session({
* workingDir: '/path/to/project',
* mux: muxManager,
* useMux: true
* });
* await session.startInteractive();
*
* // Listen for events
* session.on('terminal', (data) => console.log(data));
* session.on('message', (msg) => console.log('Claude:', msg));
*
* // Send input
* session.write('Hello Claude!\r');
*
* // Stop when done
* await session.stop();
* ```
*
* @fires Session#terminal - Raw terminal output
* @fires Session#message - Parsed Claude JSON message
* @fires Session#completion - One-shot prompt completed
* @fires Session#exit - Process exited
* @fires Session#autoClear - Token threshold reached, clearing context
* @fires Session#autoCompact - Token threshold reached, compacting context
*/
export class Session extends EventEmitter {
readonly id: string;
readonly workingDir: string;
readonly createdAt: number;
readonly mode: SessionMode;
// Task description cache (extracted to SessionTaskCache)
private _taskCache = new SessionTaskCache();
private _name: string;
private ptyProcess: pty.IPty | null = null;
private _pid: number | null = null;
private _status: SessionStatus = 'idle';
private _currentTaskId: string | null = null;
// COD-118: bound repeated non-zero interactive-PTY exits. Recorded in the
// interactive PTY onExit handler; when it trips, the session flips to 'error'
// and startInteractive() refuses to respawn until an explicit user restart
// calls resetRespawnBreaker(). Defense-in-depth over the COD-115 crash-loop.
private readonly _ptyExitBreaker = new InteractivePtyExitBreaker();
private _respawnBlocked = false;
// Use BufferAccumulator for hot-path buffers to reduce GC pressure
private _terminalBuffer = new BufferAccumulator(MAX_TERMINAL_BUFFER_SIZE, TERMINAL_BUFFER_TRIM_SIZE);
private _textOutput = new BufferAccumulator(MAX_TEXT_OUTPUT_SIZE, TEXT_OUTPUT_TRIM_SIZE);
private _errorBuffer: string = '';
private _lastActivityAt: number;
private _claudeSessionId: string | null = null;
private _totalCost: number = 0;
private _messages: ClaudeMessage[] = [];
private _lineBuffer: string = '';
private _lineBufferFlushTimer: NodeJS.Timeout | null = null;
// Alt-screen-strip modes (Codex/Claude): trailing partial CSI held back so
// sequences split across PTY chunks can't slip past the alt-screen/scrollback
// strip (see _handleTerminalOutput / isAltScreenStripMode)
private _altScreenSeqCarry: string = '';
private resolvePromise: ((value: { result: string; cost: number }) => void) | null = null;
private rejectPromise: ((reason: Error) => void) | null = null;
private _promptResolved: boolean = false; // Guard against race conditions in runPrompt
private _isWorking: boolean = false;
private _lastPromptTime: number = 0;
private activityTimeout: NodeJS.Timeout | null = null;
private _awaitingIdleConfirmation: boolean = false; // Prevents timeout reset during idle detection
private _trustDialogAccepted: boolean = false; // Prevents repeated trust dialog auto-accept
private _taskTracker: TaskTracker;
// Token tracking for auto-clear
private _totalInputTokens: number = 0;
private _totalOutputTokens: number = 0;
// Auto-compact/auto-clear automation (extracted to SessionAutoOps)
private _autoOps!: SessionAutoOps;
// Image watcher setting (per-session toggle)
private _imageWatcherEnabled: boolean = false;
// Pin state (COD-139) — pinned sessions float to the top of the session
// manager list, ordered by pinnedAt descending (most-recently-pinned first).
private _pinned: boolean = false;
private _pinnedAt: number | null = null;
// Flicker filter setting (per-session toggle, applied on frontend)
private _flickerFilterEnabled: boolean = false;
// Claude Code CLI info (parsed from terminal startup)
private _cliVersion: string = '';
private _cliModel: string = '';
private _cliAccountType: string = '';
private _cliLatestVersion: string = '';
private _cliInfoParsed: boolean = false; // Only parse once per session
// Timer tracking for cleanup (prevents memory leaks)
private _promptCheckInterval: NodeJS.Timeout | null = null;
private _promptCheckTimeout: NodeJS.Timeout | null = null;
private _shellIdleTimer: NodeJS.Timeout | null = null;
// Multiplexer session support (tmux)
private _mux: TerminalMultiplexer | null = null;
private _muxSession: MuxSession | null = null;
private _useMux: boolean = false;
// Flag to prevent new timers after session is stopped
private _isStopped: boolean = false;
// Ralph tracking (Ralph Wiggum loops and todo lists inside Claude Code)
private _ralphTracker: RalphTracker;
// Agent tree tracking
private _parentAgentId: string | null = null;
private _childAgentIds: string[] = [];
// Bounded dedup set for terminal attachment magic-links already requested.
private _attachmentMagicSeen = new Set<string>();
private _attachmentHistory: SessionAttachmentHistoryItem[] = [];
// Nice prioritying configuration
private _niceConfig: NiceConfig = { ...DEFAULT_NICE_CONFIG };
// Claude model override (e.g., 'opus', 'sonnet', 'haiku')
private _model: string | undefined;
// Claude CLI startup permission mode
private _claudeMode: ClaudeMode = 'dangerously-skip-permissions';
private _allowedTools: string | undefined;
// OpenCode configuration (only for mode === 'opencode')
private _openCodeConfig: OpenCodeConfig | undefined;
// Codex configuration (only for mode === 'codex')
private _codexConfig: CodexConfig | undefined;
// Gemini configuration (only for mode === 'gemini')
private _geminiConfig: GeminiConfig | undefined;
private _resumeSessionId: string | undefined;
// Ephemeral env overrides (e.g., CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS). Exported by tmux
// at spawn, preserved across respawns via persisted state. Not written to .claude/settings.local.json.
private _envOverrides: Record<string, string> | undefined;
// Claude CLI effort level — injected as a `--settings` soft default at spawn so the
// user can still switch in-session via /effort (incl. ultracode). Never carried as
// the CLAUDE_CODE_EFFORT_LEVEL env var, which would hard-lock the session.
private _effort: EffortLevel | undefined;
// tmux history-limit (scrollback lines) applied to this session's pane.
private readonly _tmuxHistoryLimit: number;
// Remote execution metadata, present when this session runs over SSH through local tmux.
private readonly _remote?: SessionRemote;
// Docker execution metadata, present when this session runs inside a container via
// local tmux + `docker exec`. The container is per-CASE (shared by sibling sessions).
private readonly _docker?: SessionDocker;
// Owning username in multi-user mode (undefined in single-user). Stamped at create
// from req.authUser and round-tripped through recovery like _remote/_docker.
private _owner?: string;
// Session color for visual differentiation
private _color: import('./types.js').SessionColor = 'default';
// Store handler references for cleanup (prevents memory leaks)
private _taskTrackerHandlers: {
taskCreated: (task: BackgroundTask) => void;
taskUpdated: (task: BackgroundTask) => void;
taskCompleted: (task: BackgroundTask) => void;
taskFailed: (task: BackgroundTask, error: string) => void;
} | null = null;
private _ralphHandlers: {
loopUpdate: (state: RalphTrackerState) => void;
todoUpdate: (todos: RalphTodoItem[]) => void;
completionDetected: (phrase: string) => void;
statusBlockDetected: (block: import('./types.js').RalphStatusBlock) => void;
circuitBreakerUpdate: (status: import('./types.js').CircuitBreakerStatus) => void;
exitGateMet: (data: { completionIndicators: number; exitSignal: boolean }) => void;
} | null = null;
// Bash tool tracking (file paths for live log viewing)
private _bashToolParser: BashToolParser;
private _bashToolHandlers: {
toolStart: (tool: ActiveBashTool) => void;
toolEnd: (tool: ActiveBashTool) => void;
toolsUpdate: (tools: ActiveBashTool[]) => void;
} | null = null;
// Task descriptions parsed from terminal output — delegated to SessionTaskCache
// Throttle expensive PTY processing (Ralph, bash parser, task descriptions)
// Accumulates clean data between processing windows to avoid running regex on every chunk
private _lastExpensiveProcessTime: number = 0;
private _pendingCleanData: string = '';
private _expensiveProcessTimer: NodeJS.Timeout | null = null;
private static readonly EXPENSIVE_PROCESS_INTERVAL_MS = 150; // Process at most every 150ms
constructor(
config: Partial<SessionConfig> & {
workingDir: string;
mode?: SessionMode;
name?: string;
/** Terminal multiplexer instance (tmux) */
mux?: TerminalMultiplexer;
/** Whether to use multiplexer wrapping */
useMux?: boolean;
/** Existing mux session for restored sessions */
muxSession?: MuxSession;
niceConfig?: NiceConfig; // Nice prioritying configuration
/** Claude model override (e.g., 'opus', 'sonnet', 'haiku') */
model?: string;
/** Claude CLI startup permission mode */
claudeMode?: ClaudeMode;
/** Comma-separated allowed tools (for 'allowedTools' mode) */
allowedTools?: string;
/** OpenCode configuration (only for mode === 'opencode') */
openCodeConfig?: OpenCodeConfig;
/** Codex configuration (only for mode === 'codex') */
codexConfig?: CodexConfig;
/** Gemini configuration (only for mode === 'gemini') */
geminiConfig?: GeminiConfig;
/** Resume a previous Claude conversation (used after server reboot) */
resumeSessionId?: string;
/** Extra env vars exported to the CLI at spawn time (no disk persistence) */
envOverrides?: Record<string, string>;
/** Claude CLI effort level (soft default via --settings, switchable in-session via /effort) */
effort?: EffortLevel;
/** tmux history-limit (scrollback lines) for this session's pane. */
tmuxHistoryLimit?: number;
/** Restored per-session attachment history. May include server-private external paths. */
attachmentHistory?: SessionAttachmentHistoryItem[];
/** Remote execution metadata for sessions launched through SSH inside local tmux. */
remote?: SessionRemote;
/** Docker execution metadata for sessions launched inside a container via local tmux. */
docker?: SessionDocker;
/** Owning username (multi-user mode); undefined in single-user. */
owner?: string;
}
) {
super();
this.setMaxListeners(25);
// Default error handler prevents unhandled 'error' events from crashing the process.
// Server attaches its own handler after construction — this is a safety net for the gap.
this.on('error', (err) => {
console.error(`[Session] Unhandled error event:`, err);
});
this.id = config.id || uuidv4();
this.workingDir = config.workingDir;
this.createdAt = config.createdAt || Date.now();
this.mode = config.mode || 'claude';
this._name = config.name || '';
this._resumeSessionId = config.resumeSessionId;
this._lastActivityAt = this.createdAt;
// Set claudeSessionId — when resuming, the Claude conversation ID is the resumed one.
this._claudeSessionId = config.resumeSessionId || this.id;
this._mux = config.mux || null;
this._useMux = config.useMux ?? (this._mux !== null && this._mux.isAvailable());
this._muxSession = config.muxSession || null;
// Apply Nice priority configuration if provided
if (config.niceConfig) {
this._niceConfig = { ...config.niceConfig };
}
// Apply model override if provided
if (config.model) {
this._model = config.model;
}
// Apply Claude CLI permission mode
if (config.claudeMode) {
this._claudeMode = config.claudeMode;
}
if (config.allowedTools) {
this._allowedTools = config.allowedTools;
}
// Apply OpenCode configuration
if (config.openCodeConfig) {
this._openCodeConfig = config.openCodeConfig;
}
// Apply Codex configuration
if (config.codexConfig) {
this._codexConfig = config.codexConfig;
}
// Apply Gemini configuration
if (config.geminiConfig) {
this._geminiConfig = config.geminiConfig;
}
// Apply env overrides (exported at spawn, not persisted to disk).
// Legacy migration: pre-0.7.2 carried effort as the CLAUDE_CODE_EFFORT_LEVEL env var,
// which hard-locks /effort switching. Extract it into _effort (--settings soft default)
// and never export it as an env var again. Explicit config.effort wins over legacy.
if (config.envOverrides && Object.keys(config.envOverrides).length > 0) {
const { CLAUDE_CODE_EFFORT_LEVEL: legacyEffort, ...restOverrides } = config.envOverrides;
this._envOverrides = Object.keys(restOverrides).length > 0 ? restOverrides : undefined;
if (legacyEffort && isEffortLevel(legacyEffort)) {
this._effort = legacyEffort;
}
}
if (config.effort && isEffortLevel(config.effort)) {
this._effort = config.effort;
}
this._tmuxHistoryLimit = config.tmuxHistoryLimit ?? DEFAULT_TMUX_HISTORY_LIMIT;
this._remote = config.remote;
this._docker = config.docker;
this._owner = config.owner;
if (config.attachmentHistory && config.attachmentHistory.length > 0) {
this.restoreAttachmentHistory(config.attachmentHistory);
}
// Initialize task tracker and forward events (store handlers for cleanup)
this._taskTracker = new TaskTracker();
this._taskTrackerHandlers = {
taskCreated: (task) => this.emit('taskCreated', task),
taskUpdated: (task) => this.emit('taskUpdated', task),
taskCompleted: (task) => this.emit('taskCompleted', task),
taskFailed: (task, error) => this.emit('taskFailed', task, error),
};
this._taskTracker.on('taskCreated', this._taskTrackerHandlers.taskCreated);
this._taskTracker.on('taskUpdated', this._taskTrackerHandlers.taskUpdated);
this._taskTracker.on('taskCompleted', this._taskTrackerHandlers.taskCompleted);
this._taskTracker.on('taskFailed', this._taskTrackerHandlers.taskFailed);
// Initialize Ralph tracker and forward events (store handlers for cleanup)
this._ralphTracker = new RalphTracker();
this._ralphHandlers = {
loopUpdate: (state) => this.emit('ralphLoopUpdate', state),
todoUpdate: (todos) => this.emit('ralphTodoUpdate', todos),
completionDetected: (phrase) => this.emit('ralphCompletionDetected', phrase),
statusBlockDetected: (block) => this.emit('ralphStatusBlockDetected', block),
circuitBreakerUpdate: (status) => this.emit('ralphCircuitBreakerUpdate', status),
exitGateMet: (data) => this.emit('ralphExitGateMet', data),
};
this._ralphTracker.on('loopUpdate', this._ralphHandlers.loopUpdate);
this._ralphTracker.on('todoUpdate', this._ralphHandlers.todoUpdate);
this._ralphTracker.on('completionDetected', this._ralphHandlers.completionDetected);
this._ralphTracker.on('statusBlockDetected', this._ralphHandlers.statusBlockDetected);
this._ralphTracker.on('circuitBreakerUpdate', this._ralphHandlers.circuitBreakerUpdate);
this._ralphTracker.on('exitGateMet', this._ralphHandlers.exitGateMet);
// Initialize Bash tool parser and forward events (store handlers for cleanup)
this._bashToolParser = new BashToolParser({ sessionId: this.id, workingDir: this.workingDir });
this._bashToolHandlers = {
toolStart: (tool) => this.emit('bashToolStart', tool),
toolEnd: (tool) => this.emit('bashToolEnd', tool),
toolsUpdate: (tools) => this.emit('bashToolsUpdate', tools),
};
this._bashToolParser.on('toolStart', this._bashToolHandlers.toolStart);
this._bashToolParser.on('toolEnd', this._bashToolHandlers.toolEnd);
this._bashToolParser.on('toolsUpdate', this._bashToolHandlers.toolsUpdate);
// Initialize auto-compact/auto-clear automation and forward events
this._autoOps = new SessionAutoOps({
writeCommand: (cmd) => this.writeViaMux(cmd),
isWorking: () => this._isWorking,
isStopped: () => this._isStopped,
getTotalTokens: () => this._totalInputTokens + this._totalOutputTokens,
getSessionId: () => this.id,
});
this._autoOps.on('autoCompact', (data) => this.emit('autoCompact', data));
this._autoOps.on('autoClear', (data) => {
// Reset token counts on clear
this._totalInputTokens = 0;
this._totalOutputTokens = 0;
this.emit('autoClear', data);
});
this._autoOps.on('limitPauseScheduled', (data) => this.emit('limitPauseScheduled', data));
this._autoOps.on('limitResume', (data) => this.emit('limitResume', data));
this._autoOps.on('limitResumeCancelled', (data) => this.emit('limitResumeCancelled', data));
}
get status(): SessionStatus {
return this._status;
}
get currentTaskId(): string | null {
return this._currentTaskId;
}
get pid(): number | null {
return this._pid;
}
get terminalBuffer(): string {
return this._terminalBuffer.value;
}
get terminalBufferLength(): number {
return this._terminalBuffer.length;
}
get textOutput(): string {
return this._textOutput.value;
}
get errorBuffer(): string {
return this._errorBuffer;
}
get lastActivityAt(): number {
return this._lastActivityAt;
}
get claudeSessionId(): string | null {
return this._claudeSessionId;
}
/** Docker execution metadata when this session runs inside a container, else undefined. */
get docker(): SessionDocker | undefined {
return this._docker;
}
/** Owning username in multi-user mode, else undefined. */
get owner(): string | undefined {
return this._owner;
}
/** Set the owning username (used by recovery to restore ownership). */
set owner(username: string | undefined) {
this._owner = username;
}
// Adopt a Claude conversation ID observed from an external source (e.g. hook
// payload). In interactive PTY mode Claude CLI emits no JSON to stdout, so
// `_handleJsonMessage` never sees `session_id`; hooks are the only signal
// that conveys a post-/clear conversation switch.
adoptClaudeSessionId(newId: string): void {
if (!newId || newId === this._claudeSessionId) return;
this._claudeSessionId = newId;
}
/** The tmux session name, if the session is running inside a mux */
get muxName(): string | null {
return this._muxSession?.muxName ?? null;
}
get totalCost(): number {
return this._totalCost;
}
get messages(): ClaudeMessage[] {
return this._messages;
}
get isWorking(): boolean {
return this._isWorking;
}
/**
* Check if the session's process tree has active child processes beyond Claude itself.
* Detects running bash tools, test suites, builds, servers, etc. that Claude spawned.
*
* The tmux pane PID is typically "claude" directly (bash exec'd into it). When Claude
* runs a bash tool, it spawns child processes: claude → bash → npm/node/python/etc.
* We check direct children of the pane PID, filtering out "claude" itself (for the rare
* case where bash wraps claude and didn't exec).
*
* Returns an array of {pid, command} for each child process, or empty array if none.
* Returns empty array if no mux session or on error (fail-open to avoid blocking respawn).
*/
getActiveChildProcesses(): { pid: number; command: string }[] {
if (!this._muxSession) return [];
try {
const panePid = this._muxSession.pid;
// Single call: get direct children with their command names
const output = execSync(`ps -o pid=,comm= --ppid ${panePid} 2>/dev/null`, {
encoding: 'utf-8',
timeout: EXEC_TIMEOUT_MS,
}).trim();
if (!output) return [];
const activeProcesses: { pid: number; command: string }[] = [];
for (const line of output.split('\n')) {
const match = line.trim().match(/^(\d+)\s+(.+)/);
if (!match) continue;
const pid = parseInt(match[1], 10);
const command = match[2].trim();
// Skip the claude process itself (pane_pid may be bash wrapping claude)
if (command === 'claude') continue;
activeProcesses.push({ pid, command });
}
return activeProcesses;
} catch {
// ps returns exit code 1 when no matches — normal (no children)
return [];
}
}
get lastPromptTime(): number {
return this._lastPromptTime;
}
get taskTracker(): TaskTracker {
return this._taskTracker;
}
get runningTaskCount(): number {
return this._taskTracker.getRunningCount();
}
get taskTree(): BackgroundTask[] {
return this._taskTracker.getTaskTree();
}
get taskStats(): { total: number; running: number; completed: number; failed: number } {
return this._taskTracker.getStats();
}
// Ralph tracking getters
get ralphTracker(): RalphTracker {
return this._ralphTracker;
}
get ralphLoopState(): RalphTrackerState {
return this._ralphTracker.loopState;
}
get ralphTodos(): RalphTodoItem[] {
return this._ralphTracker.todos;
}
get ralphTodoStats(): { total: number; pending: number; inProgress: number; completed: number } {
return this._ralphTracker.getTodoStats();
}
// Bash tool tracking getters
get bashToolParser(): BashToolParser {
return this._bashToolParser;
}
get activeTools(): ActiveBashTool[] {
return this._bashToolParser.activeTools;
}
get parentAgentId(): string | null {
return this._parentAgentId;
}
set parentAgentId(value: string | null) {
this._parentAgentId = value;
}
get childAgentIds(): string[] {
return [...this._childAgentIds];
}
addChildAgentId(agentId: string): void {
if (!this._childAgentIds.includes(agentId)) {
this._childAgentIds.push(agentId);
}
}
removeChildAgentId(agentId: string): void {
const idx = this._childAgentIds.indexOf(agentId);
if (idx >= 0) this._childAgentIds.splice(idx, 1);
}
// Nice priority config getters and setters
get niceConfig(): NiceConfig {
return { ...this._niceConfig };
}
/** Claude CLI startup permission mode */
get claudeMode(): ClaudeMode {
return this._claudeMode;
}
/** Allowed tools list (for 'allowedTools' mode) */
get allowedTools(): string | undefined {
return this._allowedTools;
}
/** Codex CLI configuration for this session. */
get codexConfig(): CodexConfig | undefined {
return this._codexConfig;
}
// Note: _buildPermissionArgs removed — now using buildInteractiveArgs from session-cli-builder.ts
/**
* Set CPU priority configuration.
* Note: This only affects new sessions; existing running processes won't be changed.
*/
setNice(config: Partial<NiceConfig>): void {
if (config.enabled !== undefined) {
this._niceConfig.enabled = config.enabled;
}
if (config.niceValue !== undefined) {
// Clamp to valid range
this._niceConfig.niceValue = Math.max(-20, Math.min(19, config.niceValue));
}
}
// Session color for visual differentiation
get color(): import('./types.js').SessionColor {
return this._color;
}
setColor(color: import('./types.js').SessionColor): void {
const validColors = ['default', 'red', 'orange', 'yellow', 'green', 'blue', 'purple', 'pink'];
if (validColors.includes(color)) {
this._color = color;
}
}
// Token tracking getters and setters
get totalTokens(): number {
return this._totalInputTokens + this._totalOutputTokens;
}
get inputTokens(): number {
return this._totalInputTokens;
}
get outputTokens(): number {
return this._totalOutputTokens;
}
/**
* Restore token and cost values from saved state.
* Called when recovering sessions after server restart.
*/
restoreTokens(inputTokens: number, outputTokens: number, totalCost: number): void {
// Sanity check: reject absurdly large individual values
if (inputTokens > MAX_SESSION_TOKENS || outputTokens > MAX_SESSION_TOKENS) {
console.warn(
`[Session ${this.id}] Rejected absurd restored tokens: input=${inputTokens}, output=${outputTokens}`
);
return;
}
// Check token sum doesn't overflow MAX_SESSION_TOKENS
if (inputTokens + outputTokens > MAX_SESSION_TOKENS) {
console.warn(
`[Session ${this.id}] Rejected token sum overflow: input=${inputTokens} + output=${outputTokens} = ${inputTokens + outputTokens} > ${MAX_SESSION_TOKENS}`
);
return;
}
// Reject negative values
if (inputTokens < 0 || outputTokens < 0 || totalCost < 0) {
console.warn(
`[Session ${this.id}] Rejected negative restored tokens: input=${inputTokens}, output=${outputTokens}, cost=${totalCost}`
);
return;
}
this._totalInputTokens = inputTokens;
this._totalOutputTokens = outputTokens;
this._totalCost = totalCost;
}
get autoClearThreshold(): number {
return this._autoOps.autoClearThreshold;
}
get autoClearEnabled(): boolean {
return this._autoOps.autoClearEnabled;
}
get name(): string {
return this._name;
}
set name(value: string) {
this._name = value;
}
setAutoClear(enabled: boolean, threshold?: number): void {
this._autoOps.setAutoClear(enabled, threshold);
}
get autoCompactThreshold(): number {
return this._autoOps.autoCompactThreshold;
}
get autoCompactEnabled(): boolean {
return this._autoOps.autoCompactEnabled;
}
get autoCompactPrompt(): string {
return this._autoOps.autoCompactPrompt;
}
setAutoCompact(enabled: boolean, threshold?: number, prompt?: string): void {
this._autoOps.setAutoCompact(enabled, threshold, prompt);
}
get autoResumeEnabled(): boolean {
return this._autoOps.autoResumeEnabled;
}
/** When the scheduled usage-limit auto-resume fires (epoch ms), or null. */
get autoResumeAt(): number | null {
return this._autoOps.autoResumeAt;
}
/** True while the session is paused on a Claude usage limit (auto-resume armed). */
get isLimitPaused(): boolean {
return this._autoOps.isLimitPaused;
}
setAutoResume(enabled: boolean): void {
this._autoOps.setAutoResume(enabled);
// Users typically enable this WHILE a session already sits paused — the
// limit footer won't reprint on its own, so scan the recent buffer once.
// Only a future reset time counts: stale scrollback must not arm a resume.
if (enabled && !isExternalCliMode(this.mode)) {
const tail = this._terminalBuffer.value.slice(-8192).replace(ANSI_ESCAPE_PATTERN_FULL, '');
const detection = detectUsageLimitPause(tail);
if (detection && detection.resetAt > Date.now()) {
this._autoOps.processCleanData(tail);
}
}
}
/** Restore auto-resume state (and a pending schedule) after Codeman restart. */
restoreAutoResume(enabled: boolean, resumeAt?: number): void {
this._autoOps.restoreAutoResume(enabled, resumeAt);
}
get imageWatcherEnabled(): boolean {
return this._imageWatcherEnabled;
}
set imageWatcherEnabled(enabled: boolean) {
this._imageWatcherEnabled = enabled;
}
/** Whether this session is pinned to the top of the session manager (COD-139). */
get pinned(): boolean {
return this._pinned;
}
/** When the session was pinned (epoch ms), or null when unpinned. */
get pinnedAt(): number | null {
return this._pinnedAt;
}
/**
* Set pin state (COD-139). Pinning stamps pinnedAt with now so the pinned
* group orders most-recently-pinned first; unpinning clears it. Idempotent:
* re-pinning an already-pinned session refreshes its pinnedAt.
*/
setPinned(pinned: boolean): void {
this._pinned = pinned;
this._pinnedAt = pinned ? Date.now() : null;
}
get flickerFilterEnabled(): boolean {
return this._flickerFilterEnabled;
}
set flickerFilterEnabled(enabled: boolean) {
this._flickerFilterEnabled = enabled;
}
isIdle(): boolean {
return this._status === 'idle';
}
isBusy(): boolean {
return this._status === 'busy';
}
isRunning(): boolean {
return this._status === 'idle' || this._status === 'busy';
}
get attachmentHistory(): SessionAttachmentHistoryItem[] {
return sanitizeAttachmentHistory(this._attachmentHistory);
}
upsertAttachmentHistory(item: SessionAttachmentHistoryItem): void {
this._attachmentHistory = upsertAttachmentHistoryList(this._attachmentHistory, item);
}
restoreAttachmentHistory(history: SessionAttachmentHistoryItem[] | undefined): void {
this._attachmentHistory = [];
for (const item of [...(history ?? [])].reverse()) {
// Guard against malformed/legacy on-disk entries (null, non-object, or
// missing required fields). historyKey() dereferences source/fileName, so
// a bad item would otherwise throw inside the constructor and abort the
// entire mux-recovery loop.
if (!item || typeof item !== 'object' || !item.source || !item.fileName) continue;
this.upsertAttachmentHistory(item);
}
}
getAttachmentHistoryForPersist(): SessionAttachmentHistoryItem[] | undefined {
return this._attachmentHistory.length > 0 ? this._attachmentHistory.map((item) => ({ ...item })) : undefined;
}
toState(): SessionState {
return {
id: this.id,
pid: this.pid,
status: this._status,
workingDir: this.workingDir,
remote: this._remote,
docker: this._docker,
owner: this._owner,
currentTaskId: this._currentTaskId,
createdAt: this.createdAt,
lastActivityAt: this._lastActivityAt,
name: this._name,
mode: this.mode,
autoClearEnabled: this._autoOps.autoClearEnabled,
autoClearThreshold: this._autoOps.autoClearThreshold,
autoCompactEnabled: this._autoOps.autoCompactEnabled,
autoCompactThreshold: this._autoOps.autoCompactThreshold,
autoCompactPrompt: this._autoOps.autoCompactPrompt,
autoResumeEnabled: this._autoOps.autoResumeEnabled,
autoResumeAt: this._autoOps.autoResumeAt ?? undefined,
imageWatcherEnabled: this._imageWatcherEnabled,
pinned: this._pinned || undefined,
pinnedAt: this._pinned ? (this._pinnedAt ?? undefined) : undefined,
totalCost: this._totalCost,
inputTokens: this._totalInputTokens,
outputTokens: this._totalOutputTokens,
ralphEnabled: this._ralphTracker.enabled,
ralphAutoEnableDisabled: this._ralphTracker.autoEnableDisabled || undefined,
ralphCompletionPhrase: this._ralphTracker.loopState.completionPhrase || undefined,
parentAgentId: this._parentAgentId || undefined,
childAgentIds: this._childAgentIds.length > 0 ? this._childAgentIds : undefined,
niceEnabled: this._niceConfig.enabled,
niceValue: this._niceConfig.niceValue,
color: this._color,
flickerFilterEnabled: this._flickerFilterEnabled,
cliVersion: this._cliVersion || undefined,
cliModel: this._cliModel || undefined,
cliAccountType: this._cliAccountType || undefined,
cliLatestVersion: this._cliLatestVersion || undefined,
openCodeConfig: this._openCodeConfig,
codexConfig: this._codexConfig,
geminiConfig: this._geminiConfig,
resumeSessionId: this._resumeSessionId,
effort: this._effort,
// COD-118: runtime-only — surfaced so the frontend can require explicit user
// intent before restarting a crash-looped session. Deliberately NOT restored
// by the constructor: a Codeman restart starts with a fresh breaker so boot
// recovery can re-attach.
respawnBlocked: this._respawnBlocked || undefined,
attachmentHistory: this.attachmentHistory.length > 0 ? this.attachmentHistory : undefined,
// envOverrides intentionally NOT on the public SessionState type — they must not
// leak into SSE / GET /api/sessions broadcasts (schema allows OPENCODE_*, which
// can carry secrets). For disk persistence, session-manager calls
// getEnvOverridesForPersist() and writes alongside state.
};
}
/**
* Returns a subset of env overrides safe for disk persistence (state.json).
* Only non-sensitive `CLAUDE_CODE_*` keys are included. `OPENCODE_*` keys are
* filtered out because the schema permits them and they can carry secrets
* (e.g., OPENCODE_API_KEY); secrets must not land in `~/.codeman/state.json`.
* Must NOT be included in any API-bound serializer — see toState() comment.
*/
getEnvOverridesForPersist(): Record<string, string> | undefined {
if (!this._envOverrides) return undefined;
const safe: Record<string, string> = {};
for (const [key, value] of Object.entries(this._envOverrides)) {
if (key.startsWith('CLAUDE_CODE_')) safe[key] = value;
}
return Object.keys(safe).length > 0 ? safe : undefined;
}
toDetailedState() {
return {
...this.toLightDetailedState(),
textOutput: this._textOutput.value,
terminalBuffer: this._terminalBuffer.value,
};
}
/**
* Lightweight detailed state that excludes heavy buffers (textOutput, terminalBuffer).
* Use for SSE session:updated broadcasts where buffers aren't needed.
* Full buffers are fetched on-demand via /api/sessions/:id/terminal.
*/
toLightDetailedState() {
return {
...this.toState(),
name: this._name,
mode: this.mode,
claudeSessionId: this._claudeSessionId,
totalCost: this._totalCost,
messageCount: this._messages.length,
isWorking: this._isWorking,
lastPromptTime: this._lastPromptTime,
// Buffer statistics for monitoring long-running sessions
bufferStats: {
terminalBufferSize: this._terminalBuffer.length,
textOutputSize: this._textOutput.length,
messageCount: this._messages.length,
maxTerminalBuffer: MAX_TERMINAL_BUFFER_SIZE,
maxTextOutput: MAX_TEXT_OUTPUT_SIZE,
maxMessages: MAX_MESSAGES,
},
// Background task tracking (light tree strips large output strings)
taskStats: this._taskTracker.getStats(),
taskTree: this._taskTracker.getTaskTreeLight(),
// Token tracking
tokens: {
input: this._totalInputTokens,
output: this._totalOutputTokens,
total: this._totalInputTokens + this._totalOutputTokens,
},
autoClear: {
enabled: this._autoOps.autoClearEnabled,
threshold: this._autoOps.autoClearThreshold,
},
// CPU priority configuration
nice: {
enabled: this._niceConfig.enabled,
niceValue: this._niceConfig.niceValue,
},
// Ralph tracking state
ralphLoop: this._ralphTracker.loopState,
ralphTodos: this._ralphTracker.todos,
ralphTodoStats: this._ralphTracker.getTodoStats(),
};
}
/**
* Starts an interactive Claude CLI session with full terminal support.
*
* This spawns Claude CLI in interactive mode with the configured permission
* mode (default: `--dangerously-skip-permissions`). If mux wrapping is enabled,
* the session runs inside a tmux session for persistence across disconnects.
*
* @throws {Error} If a process is already running in this session
*
* @example
* ```typescript
* const session = new Session({ workingDir: '/project', useMux: true });
* await session.startInteractive();
* session.on('terminal', (data) => process.stdout.write(data));
* session.write('help me with this code\r');
* ```
*/
private async _setupOrAttachMuxSession(options: {
respawnPaneOptions: import('./mux-interface.js').RespawnPaneOptions;
createSessionOptions: import('./mux-interface.js').CreateSessionOptions;
spawnErrLabel: string;
}): Promise<{ isRestored: boolean }> {
const mux = this._mux!;
// Verify stale mux session — tmux may have been destroyed (e.g., killed externally)
if (this._muxSession && !mux.muxSessionExists(this._muxSession.muxName)) {
console.log('[Session] Stale mux session detected (tmux gone):', this._muxSession.muxName);
this._muxSession = null;
}
// Check if session exists but pane is dead (remain-on-exit keeps it alive)
// Respawn the pane instead of creating a whole new session — preserves tmux scrollback
let needsNewSession = false;
if (this._muxSession && mux.isPaneDead(this._muxSession.muxName)) {
console.log('[Session] Dead pane detected, respawning:', this._muxSession.muxName);
const newPid = await mux.respawnPane(options.respawnPaneOptions);
if (!newPid) {
console.error('[Session] Failed to respawn pane, will create new session');
needsNewSession = true;
} else {
// Wait a moment for the respawned process to fully start
await new Promise((resolve) => setTimeout(resolve, MUX_STARTUP_DELAY_MS));
}
}
// Check if we already have a mux session (restored session)
const isRestored = this._muxSession !== null && !needsNewSession;
if (isRestored) {
console.log('[Session] Attaching to existing mux session:', this._muxSession!.muxName);
} else {
// Create a new mux session
this._muxSession = await mux.createSession(options.createSessionOptions);
console.log('[Session] Created mux session:', this._muxSession.muxName);
// No extra sleep — createSession() already waits for tmux readiness
}
// Attach to the mux session via PTY
// Prevent tmux from letting the newest browser attach dictate global window
// size; accepted Codeman resize events update it explicitly below.
mux.setManualWindowSize?.(this._muxSession!.muxName);
// Query existing tmux window size so re-attach matches (avoids flicker from 120x40 default).
// MUST go through the dedicated socket (mux.muxSocket); a bare `tmux display` hits the
// default server, always fails for our socketed sessions, and silently falls back to 120x40.
const { cols: ptyCols, rows: ptyRows } = queryTmuxWindowSize(this._muxSession!.muxName, mux.muxSocket);
try {
this.ptyProcess = pty.spawn(mux.getAttachCommand(), mux.getAttachArgs(this._muxSession!.muxName), {
name: 'xterm-256color',
cols: ptyCols,
rows: ptyRows,
cwd: resolveMuxAttachCwd(this.workingDir, this._remote, this._docker),
// COD-75: codex/gemini get COLORTERM=truecolor — mirrors buildEnvExports()
// in tmux-manager.ts so the attach client and the tmux session agree.
env: buildMuxAttachEnv(this.mode === 'codex' || this.mode === 'gemini'),
});
} catch (spawnErr) {
console.error(`[Session] Failed to spawn PTY for ${options.spawnErrLabel}:`, spawnErr);
this.emit('error', `Failed to attach to mux session: ${spawnErr}`);
throw spawnErr;
}
return { isRestored };
}
/**
* COD-108 — re-establish a dropped REMOTE session. Triggered by the
* `TmuxManager` remote-reconnect watcher (via `remoteSessionDropped`): the
* watcher detects a dead remote pane, the session owner reassembles the SAME
* `RespawnPaneOptions` used for Claude-idle respawns and calls
* `respawnPane()` directly. For a remote session that re-runs
* `buildRemoteSessionCommand` (owned → `new-session -A`, non-owned →
* `attach`), which idempotently REATTACHES the still-running durable remote
* tmux session — scrollback + agent intact (proven COD-104/105).
*
* Deliberately does NOT route through the Claude-idle respawn-controller —
* this is a transport re-establish, not a `/clear`/`/compact` cycle.
*
* @returns true if the pane was respawned (reattach issued), false otherwise.
*/
async reattachRemote(): Promise<boolean> {
if (!this._remote) return false; // not a remote session
if (!this._useMux || !this._mux || !this._muxSession) return false;
const mux = this._mux;
// If tmux lost the whole session (not just a dead pane), there is nothing to
// respawn into — a genuine death, leave it for normal recovery/reconcile.
if (!mux.muxSessionExists(this._muxSession.muxName)) {
console.log('[Session] reattachRemote: mux session gone, skipping:', this._muxSession.muxName);
return false;
}
const newPid = await mux.respawnPane(this._buildRespawnPaneOptions());
if (!newPid) {
console.error('[Session] reattachRemote: respawnPane failed for', this._muxSession.muxName);
return false;
}
console.log('[Session] reattachRemote: reattached remote session', this._muxSession.muxName, 'pid', newPid);
return true;
}
/**
* Assemble the {@link RespawnPaneOptions} for this session. Single source of
* truth shared by interactive start, shell start (via their inline copies),
* and {@link reattachRemote} so the remote reattach path can never drift from
* the spawn path.
*/
private _buildRespawnPaneOptions(): import('./mux-interface.js').RespawnPaneOptions {
return {
sessionId: this.id,
workingDir: this.workingDir,
mode: this.mode,
niceConfig: this._niceConfig,
model: this._model,
claudeMode: this._claudeMode,
allowedTools: this._allowedTools,
openCodeConfig: this._openCodeConfig,
codexConfig: this._codexConfig,
geminiConfig: this._geminiConfig,
resumeSessionId: this._resumeSessionId,
envOverrides: this._envOverrides,
effort: this._effort,
historyLimit: this._tmuxHistoryLimit,
remote: this._remote,
docker: this._docker,
owner: this._owner,
};
}
private _handleTerminalOutput(data: string): void {
// Codex AND Claude Code emit sequences that wipe xterm.js scrollback, plus
// mouse-tracking enables that hijack the scroll wheel so the user can't reach
// scrollback. Claude Code does this intermittently (e.g. full-screen pickers /
// dialogs), which is why terminal scroll-up "randomly" breaks for Claude
// sessions on mobile and desktop until the dialog closes:
// - \x1b[?1049h / \x1b[?47h / \x1b[?1047h: switch to the alt buffer (no
// scrollback) — \x1b[?...l switches back.
// - \x1b[3J: erase saved lines (scrollback). (\x1b[2J / \x1b[J — erase
// the visible viewport — are left intact; the TUI repaints those rows.)
// - \x1b[?1000h / 1002h / 1003h / 1005h / 1006h / 1007h: mouse-tracking
// modes (X10, button-event, any-event, UTF-8, SGR, alt-scroll). Once on,
// xterm.js forwards wheel events to the CLI instead of scrolling the
// viewport, so the conversation is in scrollback but unreachable.
// (Focus events at ?1004 are left alone — codeman uses them for
// active-tab detection.)
// Strip them at the source so neither the persisted buffer nor the live
// SSE/WS stream carries them, keeping everything in the main buffer with
// scrollback intact. These are controlled TUIs whose cursor-positioned
// redraws overwrite only the cells they target, so non-erased rows keep
// their content. Gated to Codex/Claude (isAltScreenStripMode) — shell must
// keep the alt screen for vim/less/htop.
if (isAltScreenStripMode(this.mode)) {
// Reassemble sequences split across PTY chunk boundaries first: a chunk
// ending mid-sequence ('\x1b[?104' now, '9h' next) would slip past the
// strip below and leave xterm stuck in the scrollback-less alt buffer
// until the next buffer replay. Hold back an incomplete digit-only CSI
// tail (≤7 chars — the longest strippable intro is '\x1b[?1049') and
// prepend it to the next chunk; complete sequences are never held.
data = this._altScreenSeqCarry + data;
this._altScreenSeqCarry = '';
// eslint-disable-next-line no-control-regex
const splitTail = data.match(/\x1b(?:\[\??[0-9]{0,4})?$/);
if (splitTail) {
this._altScreenSeqCarry = splitTail[0];
data = data.slice(0, -splitTail[0].length);
if (!data) return;
}
data = data
// eslint-disable-next-line no-control-regex
.replace(/\x1b\[\?(?:47|1047|1049)[hl]/g, '')
// eslint-disable-next-line no-control-regex
.replace(/\x1b\[3J/g, '')
// eslint-disable-next-line no-control-regex
.replace(/\x1b\[\?(?:1000|1001|1002|1003|1005|1006|1007)[hl]/g, '');
}
// Scan terminal output for attachment requests. `codeman://attach?...` is an
// explicit magic link (all modes); Codex generated images report
// `Saved to: file://...` — that scanner (and its relaxed trust policy) is
// only enabled for codex-mode sessions. The web server applies the trust
// boundary for each request source.
const attachmentRequests = parseTerminalAttachmentRequests(data, { codexArtifacts: this.mode === 'codex' });
for (const request of attachmentRequests) {
const seenKey = `${request.source}:${request.path}`;
if (this._attachmentMagicSeen.has(seenKey)) continue;
this._attachmentMagicSeen.add(seenKey);
if (this._attachmentMagicSeen.size > 200) {
const oldest = this._attachmentMagicSeen.values().next().value;
if (oldest) this._attachmentMagicSeen.delete(oldest);
}
this.emit('attachmentRequested', {
sessionId: this.id,
path: request.path,
source: request.source,
timestamp: Date.now(),
});
}
// BufferAccumulator handles auto-trimming when max size exceeded
this._terminalBuffer.append(data);
this._lastActivityAt = Date.now();
this.emit('terminal', data);
this.emit('output', data);
}
async startInteractive(): Promise<void> {
if (this.ptyProcess) {
throw new Error('Session already has a running process');
}
// COD-118: if the PTY exit breaker has tripped (repeated non-zero exits in a
// short window), refuse to respawn. This is the uniform choke point that stops
// automatic recovery/reconnect callers from re-creating a crash-looping PTY.
// An explicit user restart clears it via resetRespawnBreaker().
if (this._respawnBlocked) {
throw new Error(
'Respawn blocked: interactive PTY exited non-zero too many times in a short window (circuit breaker tripped). Restart the session to clear it.'
);
}
this._resetBuffers();
const modeLabel = getModeLabel(this.mode);
console.log(
`[Session] Starting interactive ${modeLabel} session` + (this._useMux ? ` (with ${this._mux!.backend})` : '')
);
// Seed the CLI version deterministically for LOCAL Claude sessions. The
// banner scrape in parseClaudeCodeInfo() is unreliable — newer Claude Code
// builds don't print "Claude Code vX.Y.Z" at startup and resumed sessions
// never show it — which left cliVersion undefined and silently disabled
// wheel-forwarding to Claude's own transcript (the only route to history in
// repaint/alt-screen mode; issue #154). Remote sessions run claude on
// another host, so a local probe wouldn't reflect their version — skip them
// and let the banner scrape handle those. Cached process-wide, best-effort.
if (this.mode === 'claude' && !this._remote && !this._docker && !this._cliVersion) {
const probedVersion = getClaudeCliVersion();
if (probedVersion) {
this._cliVersion = probedVersion;
this.emit('cliInfoUpdated', {
version: this._cliVersion,
model: this._cliModel,
accountType: this._cliAccountType,
latestVersion: this._cliLatestVersion,
});
}
}
// Docker sessions run claude INSIDE the container, so the local probe above
// reports the HOST claude (wrong version, and leaving cliVersion undefined
// silently disables wheel-forwarding, #154). Probe the IN-CONTAINER version
// instead — deferred so the container is up after the mux attach below.
if (this.mode === 'claude' && this._docker && !this._cliVersion) {
const dockerMeta = this._docker;
setTimeout(() => {
if (this._isStopped || this._cliVersion) return;
void probeDockerCliVersion(dockerMeta, this.mode)
.then((version) => {
if (!version || this._isStopped || this._cliVersion) return;
this._cliVersion = version;
this.emit('cliInfoUpdated', {
version: this._cliVersion,
model: this._cliModel,
accountType: this._cliAccountType,
latestVersion: this._cliLatestVersion,
});
})
.catch(() => {
/* best-effort */
});
}, DOCKER_CLI_VERSION_PROBE_DELAY_MS);
}
// If mux wrapping is enabled, create or attach to a mux session
if (this._useMux && this._mux) {
try {
const { isRestored } = await this._setupOrAttachMuxSession({
// Single source of truth shared with reattachRemote() (COD-108).
respawnPaneOptions: this._buildRespawnPaneOptions(),
createSessionOptions: {
sessionId: this.id,
workingDir: this.workingDir,
mode: this.mode,
name: this._name,
niceConfig: this._niceConfig,
model: this._model,
claudeMode: this._claudeMode,
allowedTools: this._allowedTools,
openCodeConfig: this._openCodeConfig,
codexConfig: this._codexConfig,
geminiConfig: this._geminiConfig,
resumeSessionId: this._resumeSessionId,
envOverrides: this._envOverrides,
effort: this._effort,
historyLimit: this._tmuxHistoryLimit,
remote: this._remote,
docker: this._docker,
owner: this._owner,
},
spawnErrLabel: 'mux attachment',
});
// Set claudeSessionId — when resuming, the Claude conversation ID is the resumed one.
this._claudeSessionId = this._resumeSessionId || this.id;
// For NEW mux sessions: wait for readiness then clean buffer
// For RESTORED mux sessions: don't do anything - client will fetch buffer on tab switch
if (!isRestored) {
if (isExternalCliMode(this.mode)) {
// External CLIs use custom TUIs — no ❯ prompt to detect.
// Wait for TUI to stabilize (output stops changing), then mark ready.
// Don't clear the buffer — the TUI's initial render IS the useful content.
// Emit needsRefresh so the client fetches the full buffer once the TUI has rendered.
this._promptCheckTimeout = setTimeout(() => {
this._promptCheckTimeout = null;
if (this._isStopped) return;
this._status = 'idle';
this.emit('needsRefresh');
}, 3000);
} else {
// Claude mode: wait for ❯ prompt
this._promptCheckInterval = setInterval(() => {
// Wait for the prompt character (❯) which means Claude is fully initialized
const bufferValue = this._terminalBuffer.value;
if (bufferValue.includes('❯') || bufferValue.includes('\u276f')) {
if (this._promptCheckInterval) {
clearInterval(this._promptCheckInterval);
this._promptCheckInterval = null;
}
if (this._promptCheckTimeout) {
clearTimeout(this._promptCheckTimeout);
this._promptCheckTimeout = null;
}
// Clean the buffer - remove mux init junk before actual content
// Strip: cursor movement (\x1b[nA/B/C/D), positioning (\x1b[n;nH),
// clear screen (\x1b[2J), scroll region (\x1b[n;nr), and whitespace
this._terminalBuffer.set(bufferValue.replace(LEADING_ANSI_WHITESPACE_PATTERN, ''));
// Signal client to refresh
this.emit('clearTerminal');
}
}, 50);
// Timeout after 5 seconds if prompt not found
this._promptCheckTimeout = setTimeout(() => {
if (this._promptCheckInterval) {
clearInterval(this._promptCheckInterval);
this._promptCheckInterval = null;
}
this._promptCheckTimeout = null;
}, 5000);
}
}
} catch (err) {
console.error('[Session] Failed to create mux session, falling back to direct PTY:', err);
this._useMux = false;
this._muxSession = null;
}
}
// Fallback to direct PTY if mux is not used
if (!this.ptyProcess) {
// OpenCode sessions require tmux for env var injection (API keys via setenv)
if (this.mode === 'opencode') {
throw new Error('OpenCode sessions require tmux. Direct PTY fallback is not supported.');
}
// Codex sessions require tmux for OPENAI_API_KEY injection via setenv
if (this.mode === 'codex') {
throw new Error('Codex sessions require tmux. Direct PTY fallback is not supported.');
}
// Gemini sessions require tmux for Gemini/Google auth env injection via setenv
if (this.mode === 'gemini') {
throw new Error('Gemini sessions require tmux. Direct PTY fallback is not supported.');
}
try {
// Pass --session-id to use the SAME ID as the Codeman session
// This ensures subagents can be directly matched to the correct tab
const args = buildInteractiveArgs(this.id, this._claudeMode, this._model, this._allowedTools, this._effort);
this.ptyProcess = pty.spawn('claude', args, {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
// Merge envOverrides after buildClaudeEnv so user settings shadow defaults.
env: { ...buildClaudeEnv(this.id), ...(this._envOverrides ?? {}) },
});
} catch (spawnErr) {
console.error('[Session] Failed to spawn Claude PTY:', spawnErr);
this._status = 'stopped';
this.emit('error', `Failed to start Claude: ${spawnErr}`);
throw new Error(`Failed to spawn Claude process: ${spawnErr}`);
}
}
// Set claudeSessionId — when resuming, the Claude conversation ID is the resumed one.
this._claudeSessionId = this._resumeSessionId || this.id;
this._pid = this.ptyProcess.pid;
console.log('[Session] Interactive PTY spawned with PID:', this._pid);
this.ptyProcess.onData((rawData: string) => {
// Filter out focus escape sequences and Ctrl+L (form feed)
const data = rawData.replace(FOCUS_ESCAPE_FILTER, '').replace(CTRL_L_PATTERN, ''); // Remove Ctrl+L
if (!data) return; // Skip if only filtered sequences
this._handleTerminalOutput(data);
// === Auto-accept workspace trust dialog ===
// Claude CLI 2.x shows "Yes, I trust this folder" prompt on first launch per directory.
// Codeman sessions run permission-skipping or classifier-guarded (auto) modes, so auto-accept.
if (!this._trustDialogAccepted && data.includes('trust this folder')) {
this._trustDialogAccepted = true;
console.log(`[Session] Auto-accepting workspace trust dialog for: ${this.id}`);
// Send Enter to accept the default selection ("Yes, I trust this folder")
this.writeViaMux('\r');
}
// === Idle/working detection runs on every chunk (latency-sensitive) ===
// Detect if Claude is working or at prompt
// The prompt line contains "❯" when waiting for input
if (data.includes('❯') || data.includes('\u276f')) {
// Only start a new timeout if we're not already awaiting idle confirmation
// This prevents status bar redraws (which include ❯) from resetting the timer
if (!this._awaitingIdleConfirmation) {
if (this.activityTimeout) clearTimeout(this.activityTimeout);
this._awaitingIdleConfirmation = true;
this.activityTimeout = setTimeout(() => {
this._awaitingIdleConfirmation = false;
// Emit idle if either:
// 1. Claude was working and is now at prompt (normal case)
// 2. Session just started and is ready (status is 'busy' but _isWorking is false)
const wasWorking = this._isWorking;
const isInitialReady = this._status === 'busy' && !this._isWorking;
if (wasWorking || isInitialReady) {
this._isWorking = false;
this._status = 'idle';
this._lastPromptTime = Date.now();
this.emit('idle');
}
}, IDLE_DETECTION_DELAY_MS);
}
}
// Detect when Claude starts working (thinking, writing, etc)
// Fast path: check spinner characters on raw data (Unicode, never in ANSI sequences)
const hasSpinner = SPINNER_PATTERN.test(data);
if (hasSpinner) {
if (!this._isWorking) {
this._isWorking = true;
this._status = 'busy';
this.emit('working');
this._autoOps.notifyWorking();
}
this._awaitingIdleConfirmation = false;
if (this.activityTimeout) clearTimeout(this.activityTimeout);
}
// === Expensive processing (ANSI strip, Ralph, bash parser) is throttled ===
// Instead of running regex-heavy parsers on every PTY chunk, we accumulate
// raw data and process at most every EXPENSIVE_PROCESS_INTERVAL_MS.
// This dramatically reduces CPU load with multiple busy sessions.
const now = Date.now();
const elapsed = now - this._lastExpensiveProcessTime;
if (elapsed >= Session.EXPENSIVE_PROCESS_INTERVAL_MS) {
// Process immediately — include any previously accumulated data
this._lastExpensiveProcessTime = now;
const accumulated = this._pendingCleanData ? this._pendingCleanData + data : data;
this._pendingCleanData = '';
if (this._expensiveProcessTimer) {
clearTimeout(this._expensiveProcessTimer);
this._expensiveProcessTimer = null;
}
this._processExpensiveParsers(accumulated);
} else {
// Accumulate for deferred processing
this._pendingCleanData += data;
// Cap accumulated size to prevent unbounded growth
if (this._pendingCleanData.length > 64 * 1024) {
this._pendingCleanData = this._pendingCleanData.slice(-32 * 1024);
}
// Schedule deferred processing if not already scheduled
if (!this._expensiveProcessTimer) {
this._expensiveProcessTimer = setTimeout(() => {
this._expensiveProcessTimer = null;
this._lastExpensiveProcessTime = Date.now();
const pending = this._pendingCleanData;
this._pendingCleanData = '';
if (pending) {
this._processExpensiveParsers(pending);
}
}, Session.EXPENSIVE_PROCESS_INTERVAL_MS - elapsed);
}
}
});
this.ptyProcess.onExit(({ exitCode }) => {
console.log('[Session] Interactive PTY exited with code:', exitCode);
// COD-118: record the exit in the circuit breaker BEFORE status bookkeeping.
// A clean (0) exit resets the counter; rapid non-zero repeats trip it.
const breakerResult = this._ptyExitBreaker.recordExit(exitCode, Date.now());
this.ptyProcess = null;
this._pid = null;
this._status = 'idle';
this._awaitingIdleConfirmation = false;
// Clear all timers to prevent memory leaks
if (this.activityTimeout) {
clearTimeout(this.activityTimeout);
this.activityTimeout = null;
}
if (this._promptCheckInterval) {
clearInterval(this._promptCheckInterval);
this._promptCheckInterval = null;
}
if (this._promptCheckTimeout) {
clearTimeout(this._promptCheckTimeout);
this._promptCheckTimeout = null;
}
// Clear expensive processing timer and flush any pending data
if (this._expensiveProcessTimer) {
clearTimeout(this._expensiveProcessTimer);
this._expensiveProcessTimer = null;
}
this._pendingCleanData = '';
// If using mux, mark the session as detached but don't kill it
if (this._muxSession && this._mux) {
this._mux.setAttached(this.id, false);
}
// COD-118: if the breaker tripped, surface an error state and block the NEXT
// respawn so recovery/reconnect callers stop looping. Still emit 'exit' below
// for normal cleanup. Cleared by an explicit user restart (resetRespawnBreaker()).
if (breakerResult.tripped && !this._respawnBlocked) {
this._respawnBlocked = true;
this._status = 'error';
console.error(
`[Session] PTY exit circuit breaker tripped for ${this.id} (${breakerResult.count} non-zero exits within window); blocking respawn.`
);
this.emit('respawnBreakerTripped', { count: breakerResult.count });
}
this.emit('exit', exitCode);
});
}
/**
* Clear the interactive-PTY exit circuit breaker (COD-118).
*
* Called on an EXPLICIT, user-initiated (re)start so an intentional restart is
* never blocked by a prior crash-loop trip. Automatic recovery/reconnect paths
* must NOT call this — that's the whole point of the breaker.
*/
resetRespawnBreaker(): void {
this._ptyExitBreaker.reset();
this._respawnBlocked = false;
}
/** Whether the interactive-PTY exit circuit breaker is currently tripped (COD-118). */
get respawnBlocked(): boolean {
return this._respawnBlocked;
}
/**
* Process expensive parsers (ANSI strip, Ralph, bash tool, token, CLI info, task descriptions).
* Called on a throttled schedule (every EXPENSIVE_PROCESS_INTERVAL_MS) instead of on every
* PTY data chunk. Receives accumulated raw data to process in one batch.
*/
private _processExpensiveParsers(rawData: string): void {
// Skip Claude-specific parsers for external CLI sessions (Ralph tracker,
// BashToolParser, token + CLI-info parsing all depend on Claude's output format).
if (isExternalCliMode(this.mode)) return;
// Lazy ANSI strip: only compute cleanData when a consumer actually needs it.
let _cleanData: string | null = null;
const getCleanData = (): string => {
if (_cleanData === null) {
_cleanData = rawData.replace(ANSI_ESCAPE_PATTERN_FULL, '');
}
return _cleanData;
};
// Forward to Ralph tracker to detect Ralph loops and todos
// (opencode sessions already returned early at line 1209)
if (this._ralphTracker.enabled || !this._ralphTracker.autoEnableDisabled) {
this._ralphTracker.processCleanData(getCleanData());
}
// Forward to Bash tool parser to detect file-viewing commands
if (this._bashToolParser.enabled) {
this._bashToolParser.processCleanData(getCleanData());
}
// Usage-limit pause detection (auto-resume on usage limit)
if (this._autoOps.autoResumeEnabled) {
this._autoOps.processCleanData(getCleanData());
}
// Parse token count from status line (e.g., "123.4k tokens" or "5234 tokens")
if (rawData.includes('token')) {
this.parseTokensFromStatusLine(getCleanData());
}
// Parse Claude Code CLI info (version, model, account type) from startup
if (!this._cliInfoParsed) {
this.parseClaudeCodeInfo(getCleanData());
}
// Parse task descriptions from terminal output (e.g., "Explore(Check files)")
if (rawData.includes('(') && rawData.includes(')')) {
this.parseTaskDescriptionsFromTerminalData(getCleanData());
}
// Work keyword detection (text-based, needs clean data)
// Only check if spinner didn't already trigger working state
if (!this._isWorking) {
const cleanData = getCleanData();
if (
cleanData.includes('Thinking') ||
cleanData.includes('Writing') ||
cleanData.includes('Reading') ||
cleanData.includes('Running')
) {
this._isWorking = true;
this._status = 'busy';
this.emit('working');
this._autoOps.notifyWorking();
this._awaitingIdleConfirmation = false;
if (this.activityTimeout) clearTimeout(this.activityTimeout);
}
}
}
/**
* Starts a plain shell session (bash/zsh) without Claude CLI.
*
* Useful for debugging, testing, or when you just need a terminal.
* Uses the user's default shell from $SHELL or falls back to /bin/bash.
*
* @throws {Error} If a process is already running in this session
*
* @example
* ```typescript
* const session = new Session({ workingDir: '/project', mode: 'shell' });
* await session.startShell();
* session.write('ls -la\r');
* ```
*/
async startShell(): Promise<void> {
if (this.ptyProcess) {
throw new Error('Session already has a running process');
}
this._resetBuffers();
// Use user's default shell or bash
const shell = process.env.SHELL || '/bin/bash';
console.log(
'[Session] Starting shell session with:',
shell + (this._useMux ? ` (with ${this._mux!.backend})` : '')
);
// If mux wrapping is enabled, create or attach to a mux session
if (this._useMux && this._mux) {
try {
const { isRestored } = await this._setupOrAttachMuxSession({
respawnPaneOptions: {
sessionId: this.id,
workingDir: this.workingDir,
mode: 'shell',
niceConfig: this._niceConfig,
envOverrides: this._envOverrides,
historyLimit: this._tmuxHistoryLimit,
remote: this._remote,
docker: this._docker,
owner: this._owner,
},
createSessionOptions: {
sessionId: this.id,
workingDir: this.workingDir,
mode: 'shell',
name: this._name,
niceConfig: this._niceConfig,
envOverrides: this._envOverrides,
historyLimit: this._tmuxHistoryLimit,
remote: this._remote,
docker: this._docker,
owner: this._owner,
},
spawnErrLabel: 'shell mux attachment',
});
// For NEW sessions: clear by sending 'clear' command to the shell
// For RESTORED sessions: don't clear - we want to see the existing output
if (!isRestored) {
setTimeout(() => {
if (this.ptyProcess) {
this._terminalBuffer.clear();
this.ptyProcess.write('clear\n');
}
}, 100);
}
} catch (err) {
console.error('[Session] Failed to create mux session, falling back to direct PTY:', err);
this._useMux = false;
this._muxSession = null;
}
}
// Fallback to direct PTY if mux is not used
if (!this.ptyProcess) {
try {
this.ptyProcess = pty.spawn(shell, [], {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: buildShellEnv(this.id),
});
} catch (spawnErr) {
console.error('[Session] Failed to spawn shell PTY:', spawnErr);
this._status = 'stopped';
this.emit('error', `Failed to start shell: ${spawnErr}`);
throw new Error(`Failed to spawn shell process: ${spawnErr}`);
}
}
this._pid = this.ptyProcess.pid;
console.log('[Session] Shell PTY spawned with PID:', this._pid);
this.ptyProcess.onData((rawData: string) => {
// Filter out focus escape sequences
const data = rawData.replace(FOCUS_ESCAPE_FILTER, '');
if (!data) return; // Skip if only focus sequences
this._handleTerminalOutput(data);
});
this.ptyProcess.onExit(({ exitCode }) => {
console.log('[Session] Shell PTY exited with code:', exitCode);
this.ptyProcess = null;
this._pid = null;
this._status = 'idle';
// Clear timers to prevent memory leaks
if (this._shellIdleTimer) {
clearTimeout(this._shellIdleTimer);
this._shellIdleTimer = null;
}
if (this.activityTimeout) {
clearTimeout(this.activityTimeout);
this.activityTimeout = null;
}
// If using mux, mark the session as detached but don't kill it
if (this._muxSession && this._mux) {
this._mux.setAttached(this.id, false);
}
this.emit('exit', exitCode);
});
// Mark as idle after a short delay (shell is ready)
this._shellIdleTimer = setTimeout(() => {
this._shellIdleTimer = null;
this._status = 'idle';
this._isWorking = false;
this.emit('idle');
}, 500);
}
/**
* Runs a one-shot prompt and returns the result.
*
* This spawns Claude CLI with `--output-format stream-json` to get
* structured JSON output. The promise resolves when Claude completes
* the response.
*
* @param prompt - The prompt text to send to Claude
* @param options - Optional configuration
* @param options.model - Model to use ('opus', 'sonnet', or full model name). Defaults to default model.
* @param options.onProgress - Callback for progress updates (token count, status)
* @returns Promise resolving to the result text and total cost in USD
* @throws {Error} If a process is already running in this session
*
* @example
* ```typescript
* const session = new Session({ workingDir: '/project' });
* const { result, cost } = await session.runPrompt('Explain this code', { model: 'opus' });
* console.log(`Response: ${result}`);
* console.log(`Cost: $${cost.toFixed(4)}`);
* ```
*/
async runPrompt(
prompt: string,
options?: { model?: string; onProgress?: (info: { tokens?: number; status?: string }) => void }
): Promise<{ result: string; cost: number }> {
return new Promise((resolve, reject) => {
if (this.ptyProcess) {
reject(new Error('Session already has a running process'));
return;
}
this._resetBuffers();
this._promptResolved = false; // Reset race condition guard
this.resolvePromise = resolve;
this.rejectPromise = reject;
try {
// Spawn claude in a real PTY
const model = options?.model;
console.log(
'[Session] Spawning PTY for claude with prompt:',
prompt.substring(0, 50),
model ? `(model: ${model})` : ''
);
const args = buildPromptArgs(prompt, model, this._claudeMode, this._allowedTools);
try {
this.ptyProcess = pty.spawn('claude', args, {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
// Merge envOverrides after buildClaudeEnv so user settings shadow defaults.
env: { ...buildClaudeEnv(this.id), ...(this._envOverrides ?? {}) },
});
} catch (spawnErr) {
console.error('[Session] Failed to spawn Claude PTY for runPrompt:', spawnErr);
this.emit(
'error',
`Failed to spawn Claude: ${spawnErr instanceof Error ? spawnErr.message : String(spawnErr)}`
);
throw spawnErr;
}
this._pid = this.ptyProcess.pid;
console.log('[Session] PTY spawned with PID:', this._pid);
// Handle terminal data
this.ptyProcess.onData((rawData: string) => {
// Filter out focus escape sequences
const data = rawData.replace(FOCUS_ESCAPE_FILTER, '');
if (!data) return; // Skip if only focus sequences
this._handleTerminalOutput(data);
// Also try to parse JSON lines for structured data
this.processOutput(data);
});
// Handle exit
this.ptyProcess.onExit(({ exitCode }) => {
console.log('[Session] PTY exited with code:', exitCode);
this.ptyProcess = null;
this._pid = null;
// Guard against race conditions: only process once per runPrompt call
if (this._promptResolved) {
this.emit('exit', exitCode);
return;
}
this._promptResolved = true;
// Capture callbacks atomically before processing
const resolve = this.resolvePromise;
const reject = this.rejectPromise;
this.resolvePromise = null;
this.rejectPromise = null;
// Find result from parsed messages or use text output
const resultMsg = this._messages.find((m) => m.type === 'result');
if (resultMsg && !resultMsg.is_error) {
this._status = 'idle';
const cost = resultMsg.total_cost_usd || 0;
this._totalCost += cost;
// Claude CLI stream-json may return empty result field — fall back to accumulated text output
const result = resultMsg.result || this._textOutput.value || '';
this.emit('completion', result, cost);
if (resolve) {
resolve({ result, cost });
}
} else if (exitCode !== 0 || (resultMsg && resultMsg.is_error)) {
this._status = 'error';
if (reject) {
reject(new Error(this._errorBuffer || this._textOutput.value || 'Process exited with error'));
}
} else {
this._status = 'idle';
if (resolve) {
resolve({
result: this._textOutput.value || this._terminalBuffer.value,
cost: this._totalCost,
});
}
}
this.emit('exit', exitCode);
});
} catch (err) {
this._status = 'error';
reject(err);
// Null callbacks to prevent memory leak (onExit won't run if spawn failed)
this.resolvePromise = null;
this.rejectPromise = null;
}
});
}
private _resetBuffers(): void {
this._status = 'busy';
this._terminalBuffer.clear();
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._lineBuffer = '';
this._altScreenSeqCarry = '';
this._lastActivityAt = Date.now();
}
private _clearAllTimers(): void {
// Clear activity timeout to prevent memory leak
if (this.activityTimeout) {
clearTimeout(this.activityTimeout);
this.activityTimeout = null;
}
// Clear line buffer flush timer
if (this._lineBufferFlushTimer) {
clearTimeout(this._lineBufferFlushTimer);
this._lineBufferFlushTimer = null;
}
// Destroy auto-compact/auto-clear automation (clears its timers)
this._autoOps.destroy();
// Clear prompt check timers
if (this._promptCheckInterval) {
clearInterval(this._promptCheckInterval);
this._promptCheckInterval = null;
}
if (this._promptCheckTimeout) {
clearTimeout(this._promptCheckTimeout);
this._promptCheckTimeout = null;
}
// Clear shell idle timer
if (this._shellIdleTimer) {
clearTimeout(this._shellIdleTimer);
this._shellIdleTimer = null;
}
// Clear expensive processing timer
if (this._expensiveProcessTimer) {
clearTimeout(this._expensiveProcessTimer);
this._expensiveProcessTimer = null;
}
this._pendingCleanData = '';
}
private _handleJsonMessage(cleanLine: string, rawLine: string): void {
try {
const msg = JSON.parse(cleanLine) as ClaudeMessage;
this._messages.push(msg);
this.emit('message', msg);
// Trim messages array for long-running sessions
if (this._messages.length > MAX_MESSAGES) {
this._messages = this._messages.slice(-Math.floor(MAX_MESSAGES * 0.8));
}
// Extract Claude session ID from messages (can be in any message type).
// Support both sessionId (camelCase) and session_id (snake_case).
// The constructor seeds _claudeSessionId with this.id as a placeholder;
// once Claude CLI emits its real session ID, adopt it so JSONL lookups
// (e.g. /api/sessions/:id/last-response) can find the transcript file.
const msgSessionId =
((msg as unknown as Record<string, unknown>).sessionId as string | undefined) ?? msg.session_id;
if (msgSessionId && msgSessionId !== this._claudeSessionId) {
this._claudeSessionId = msgSessionId;
}
// Process message for task tracking
this._taskTracker.processMessage(msg);
if (msg.type === 'assistant' && msg.message?.content) {
for (const block of msg.message.content) {
if (block.type === 'text' && block.text) {
this._textOutput.append(block.text);
}
}
// Track tokens from usage (with validation)
if (msg.message.usage) {
const inputDelta = msg.message.usage.input_tokens || 0;
const outputDelta = msg.message.usage.output_tokens || 0;
// Sanity check: max 100k tokens per message (generous limit)
const MAX_TOKENS_PER_MESSAGE = 100_000;
if (inputDelta > 0 && inputDelta <= MAX_TOKENS_PER_MESSAGE) {
this._totalInputTokens += inputDelta;
}
if (outputDelta > 0 && outputDelta <= MAX_TOKENS_PER_MESSAGE) {
this._totalOutputTokens += outputDelta;
}
// Check if we should auto-compact or auto-clear
this._autoOps.checkAutoCompact();
this._autoOps.checkAutoClear();
}
}
if (msg.type === 'result' && msg.total_cost_usd) {
this._totalCost = msg.total_cost_usd;
}
} catch (parseErr) {
// Not JSON, just regular output - this is expected for non-JSON lines
console.debug(
'[Session] Line not JSON (expected for text output):',
parseErr instanceof Error ? parseErr.message : parseErr
);
this._textOutput.append(rawLine + '\n');
}
}
private processOutput(data: string): void {
// Early return if session is stopped to prevent any processing or timer creation
if (this._isStopped) return;
// Try to extract JSON from output (Claude may output JSON in stream mode)
this._lineBuffer += data;
// Prevent unbounded line buffer growth for very long lines
if (this._lineBuffer.length > MAX_LINE_BUFFER_SIZE) {
// Force flush the oversized buffer as text output
this._textOutput.append(this._lineBuffer + '\n');
this._lineBuffer = '';
}
// Start flush timer if not running (handles partial lines after 100ms)
if (!this._lineBufferFlushTimer && this._lineBuffer.length > 0 && !this._isStopped) {
this._lineBufferFlushTimer = setTimeout(() => {
this._lineBufferFlushTimer = null;
if (this._lineBuffer.length > 0 && !this._isStopped) {
// Flush partial line as text output
this._textOutput.append(this._lineBuffer);
this._lineBuffer = '';
}
}, LINE_BUFFER_FLUSH_INTERVAL);
}
const lines = this._lineBuffer.split('\n');
this._lineBuffer = lines.pop() || '';
// Clear flush timer if buffer is now empty
if (this._lineBuffer.length === 0 && this._lineBufferFlushTimer) {
clearTimeout(this._lineBufferFlushTimer);
this._lineBufferFlushTimer = null;
}
for (const line of lines) {
const trimmed = line.trim();
// Remove ANSI escape codes for JSON parsing (use pre-compiled pattern)
const cleanLine = trimmed.replace(ANSI_ESCAPE_PATTERN_FULL, '');
if (cleanLine.startsWith('{') && cleanLine.endsWith('}')) {
this._handleJsonMessage(cleanLine, line);
} else if (trimmed) {
this._textOutput.append(line + '\n');
}
// Parse task descriptions from terminal output (e.g., "Explore(Description)")
// This captures the short description from Claude Code's Task tool output
// Use direct method since cleanLine is already ANSI-stripped (line 1460)
this.parseTaskDescriptionsDirect(cleanLine);
}
// Note: BufferAccumulator auto-trims when max size exceeded
}
/**
* Parse task descriptions from terminal data (may contain multiple lines).
* Called from interactive mode's onData handler with ANSI-stripped data.
* @param cleanData - Terminal data with ANSI codes already stripped
*/
private parseTaskDescriptionsFromTerminalData(cleanData: string): void {
// Quick pre-check: skip if no parentheses present
if (!cleanData.includes('(') || !cleanData.includes(')')) return;
// Split by newlines and process each line (data already ANSI-stripped)
const lines = cleanData.split(NEWLINE_SPLIT_PATTERN);
for (const line of lines) {
this.parseTaskDescriptionsDirect(line);
}
}
/**
* Parse task descriptions from a pre-cleaned line (no ANSI codes).
* Used by both processOutput() and parseTaskDescriptionsFromTerminalData().
*/
private parseTaskDescriptionsDirect(cleanLine: string): void {
// Quick pre-check: skip expensive regex if no common tool patterns present
if (!cleanLine.includes('(') || !cleanLine.includes(')')) return;
execPattern(TASK_TOOL_PATTERN, cleanLine, (match) => {
const description = match[2].trim();
if (description && description.length > 0) {
this._taskCache.add(Date.now(), description);
}
});
}
/**
* Get recent task descriptions parsed from terminal output.
* Returns descriptions sorted by timestamp (most recent first).
*/
getRecentTaskDescriptions(): Array<{ timestamp: number; description: string }> {
return this._taskCache.getAll();
}
/**
* Find a task description that was parsed close to a given timestamp.
* Used to correlate with SubagentWatcher discoveries.
*
* @param subagentStartTime - The timestamp when the subagent was discovered
* @param maxAgeMs - Maximum age difference to consider (default 10 seconds)
* @returns The matching description or undefined
*/
findTaskDescriptionNear(subagentStartTime: number, maxAgeMs: number = 10000): string | undefined {
return this._taskCache.findNear(subagentStartTime, maxAgeMs);
}
// Parse token count from Claude's status line in interactive mode
// Matches patterns like "123.4k tokens", "5234 tokens", "1.2M tokens"
//
// SAFETY LIMITS:
// - Max tokens per session: 500k (Claude's context is ~200k)
// - Max delta per update: 100k (prevents sudden jumps from parsing errors)
// - Rejects "M" suffix values > 0.5 (500k) to prevent false matches
private parseTokensFromStatusLine(cleanData: string): void {
// Quick pre-check: skip expensive regex if "token" not present (performance optimization)
if (!cleanData.includes('token')) return;
// Match patterns: "123.4k tokens", "5234 tokens", "1.2M tokens"
// The status line typically shows total tokens like "1.2k tokens" near the prompt
// Note: ANSI codes are already stripped by caller for performance
const tokenMatch = cleanData.match(TOKEN_PATTERN);
if (tokenMatch) {
let tokenCount = parseFloat(tokenMatch[1]);
const suffix = tokenMatch[2]?.toLowerCase();
// Convert k/M suffix to actual number
if (suffix === 'k') {
tokenCount *= 1000;
} else if (suffix === 'm') {
// Safety: Reject M values that would result in > 500k tokens
// Claude's context window is ~200k, so anything claiming millions is likely a false match
if (tokenCount > 0.5) {
console.warn(
`[Session ${this.id}] Rejected suspicious M token value: ${tokenMatch[0]} (would be ${tokenCount * 1000000} tokens)`
);
return;
}
tokenCount *= 1000000;
}
// Safety: Absolute maximum tokens per session
if (tokenCount > MAX_SESSION_TOKENS) {
console.warn(`[Session ${this.id}] Rejected token count exceeding max: ${tokenCount} > ${MAX_SESSION_TOKENS}`);
return;
}
// Only update if the new count is higher (tokens only increase within a session)
// We use total tokens as an estimate - Claude shows combined input+output
const currentTotal = this._totalInputTokens + this._totalOutputTokens;
if (tokenCount > currentTotal) {
const delta = tokenCount - currentTotal;
// Safety: Reject suspiciously large jumps (max 100k per update)
const MAX_DELTA_PER_UPDATE = 100_000;
if (delta > MAX_DELTA_PER_UPDATE) {
console.warn(
`[Session ${this.id}] Rejected suspicious token jump: ${currentTotal} -> ${tokenCount} (delta: ${delta})`
);
return;
}
// Estimate: split roughly 60% input, 40% output (common ratio)
// This is an approximation since interactive mode doesn't give us the breakdown
this._totalInputTokens += Math.round(delta * 0.6);
this._totalOutputTokens += Math.round(delta * 0.4);
// Check if we should auto-compact or auto-clear
this._autoOps.checkAutoCompact();
this._autoOps.checkAutoClear();
}
}
}
// Parse Claude Code CLI info from terminal startup output
// Extracts version, model, and account type for display in Codeman UI
// Note: Expects cleanData with ANSI codes already stripped by caller
private parseClaudeCodeInfo(cleanData: string): void {
// Only parse once per session (during startup)
if (this._cliInfoParsed) return;
// Quick pre-checks
if (
!cleanData.includes('Claude') &&
!cleanData.includes('current:') &&
!cleanData.includes('Opus') &&
!cleanData.includes('Sonnet')
) {
return;
}
let changed = false;
// Match "Claude Code v2.1.27" or "Claude Code vX.Y.Z"
if (!this._cliVersion) {
const versionMatch = cleanData.match(/Claude Code v(\d+\.\d+\.\d+)/);
if (versionMatch) {
this._cliVersion = versionMatch[1];
changed = true;
}
}
// Match model and account: "Opus 4.5 · Claude Max" or "Sonnet 4 · API"
// The · character separates model from account type
if (!this._cliModel || !this._cliAccountType) {
// Try various model patterns
const modelPatterns = [
/(Opus \d+(?:\.\d+)?)\s*[·•]\s*(.+?)(?:\s*$|\s+[~/])/,
/(Sonnet \d+(?:\.\d+)?)\s*[·•]\s*(.+?)(?:\s*$|\s+[~/])/,
/(Haiku \d+(?:\.\d+)?)\s*[·•]\s*(.+?)(?:\s*$|\s+[~/])/,
];
for (const pattern of modelPatterns) {
const match = cleanData.match(pattern);
if (match) {
if (!this._cliModel) {
this._cliModel = match[1].trim();
changed = true;
}
if (!this._cliAccountType) {
this._cliAccountType = match[2].trim();
changed = true;
}
break;
}
}
}
// Match version check: "current: 2.1.27" and "latest: 2.1.27"
if (!this._cliLatestVersion) {
const latestMatch = cleanData.match(/latest:\s*(\d+\.\d+\.\d+)/);
if (latestMatch) {
this._cliLatestVersion = latestMatch[1];
changed = true;
}
}
// Mark as parsed once we have the essential info
if (this._cliVersion && this._cliModel) {
this._cliInfoParsed = true;
}
// Emit update if anything changed
if (changed) {
this.emit('cliInfoUpdated', {
version: this._cliVersion,
model: this._cliModel,
accountType: this._cliAccountType,
latestVersion: this._cliLatestVersion,
});
}
}
// Note: checkAutoCompact/checkAutoClear moved to SessionAutoOps (this._autoOps)
/**
* Sends input directly to the PTY process.
*
* For interactive sessions, this is how you send user input to Claude.
* Remember to include `\r` (carriage return) to simulate pressing Enter.
*
* @param data - The input data to send (text, escape sequences, etc.)
*
* @example
* ```typescript
* session.write('hello world'); // Text only, no Enter
* session.write('\r'); // Enter key
* session.write('ls -la\r'); // Command with Enter
* ```
*/
write(data: string): void {
this._trackCodexSubmit(data);
if (this.ptyProcess) {
this.ptyProcess.write(data);
}
}
// ── Codex thread tracking ─────────────────────────────────────────────
// When a codex pane last submitted a message (Enter). The response-viewer
// correlates this against ~/.codex/history.jsonl entry timestamps to find
// the thread the pane is ACTUALLY on — the only signal that survives
// /resume, /new and /fork typed inside the codex TUI itself.
private _codexLastSubmitAt = 0;
get codexLastSubmitAt(): number {
return this._codexLastSubmitAt;
}
private _trackCodexSubmit(data: string): void {
if (this.mode === 'codex' && (data.includes('\r') || data.includes('\n'))) {
this._codexLastSubmitAt = Date.now();
}
}
/**
* Per-client highest-applied input sequence, for exactly-once input delivery.
* Keyed by the web client's stable `clientId`. Bounded so many devices over a
* long-lived session can't grow it without limit (insertion order = MRU, so
* eviction drops the least-recently-active client).
*/
private _appliedInputSeq = new Map<string, number>();
private static readonly MAX_INPUT_DEDUP_CLIENTS = 256;
/**
* Decide whether an input frame should be applied to the PTY or skipped as a
* duplicate redelivery. Returns true exactly once per (clientId, seq): the
* first time a seq strictly greater than the client's last-applied is seen.
* A redelivery of an already-applied seq (the client never got our ACK and
* resent) returns false. Callers should ACK regardless — a duplicate is, from
* the client's view, "delivered" — and only `write()` the PTY when this is
* true. Relies on the client delivering one client's frames in seq order over
* a single ordered stream, so `seq <= last` ⇒ already applied.
*
* Without this, the client's at-least-once redelivery (needed because a
* half-open socket silently drops frames with no error) would type a prompt
* twice whenever an ACK is lost after the write landed.
*/
shouldApplyInput(clientId: string, seq: number): boolean {
const last = this._appliedInputSeq.get(clientId);
if (last !== undefined && seq <= last) return false;
// Re-insert to move this client to the MRU end for fair eviction.
if (last !== undefined) this._appliedInputSeq.delete(clientId);
this._appliedInputSeq.set(clientId, seq);
if (this._appliedInputSeq.size > Session.MAX_INPUT_DEDUP_CLIENTS) {
const oldest = this._appliedInputSeq.keys().next().value;
if (oldest !== undefined) this._appliedInputSeq.delete(oldest);
}
return true;
}
/**
* Sends input via the terminal multiplexer's direct input mechanism.
*
* More reliable than direct PTY write for programmatic input, especially
* with Claude CLI which uses Ink (React for terminals).
* Uses tmux `send-keys -l` to inject text + Enter.
*
* @param data - Input data with optional `\r` for Enter
* @returns true if input was sent, false if no mux session or PTY
*
* @example
* ```typescript
* session.writeViaMux('/clear\r'); // Send /clear command
* session.writeViaMux('/init\r'); // Send /init command
* ```
*/
async writeViaMux(data: string): Promise<boolean> {
this._trackCodexSubmit(data);
if (this._mux && this._muxSession) {
return this._mux.sendInput(this.id, data);
}
// Fallback to PTY write
if (this.ptyProcess) {
this.ptyProcess.write(data);
return true;
}
return false;
}
/** Current PTY dimensions — used to skip no-op resizes that trigger Ink redraws */
private _ptyCols = 120;
private _ptyRows = 40;
/**
* Live WebSocket connections that have announced a desktop viewport for this
* session. While at least one is registered, small-viewport (mobile/tablet)
* resizes are ignored so a phone glancing at the session can't reflow the
* PTY under an active desktop view. Claims are connection-scoped: ws-routes
* registers them on a desktop-typed resize and releases them on socket
* close, so a mobile-only session (no desktop connected) keeps full control
* of its own size — including narrowing below the spawn default.
*
* Deliberate tradeoff: claims are WS-only because only a socket has a
* liveness signal. A desktop degraded to the stateless HTTP resize fallback
* still applies its typed resizes but holds no claim, so a concurrent phone
* can reflow it. This is cooperative UX arbitration, not a security
* boundary — untyped (legacy/API) resizes bypass claims by design.
*/
private _desktopSizeClaims = new Set<symbol>();
/**
* A desktop sizing claim only blocks small-viewport resizes while the
* desktop is RECENTLY ACTIVE (claim registration or typed input within this
* window). An abandoned-but-connected desktop tab (left open at home, screen
* locked) must not hold a phone's view hostage: without this, the phone
* renders a desktop-width stream in a narrow xterm — mid-word wraps, tmux
* dot-fill, and Ink overdraw soup (the 0.9.8–0.9.12 mobile regression).
*/
private static readonly DESKTOP_CLAIM_IDLE_MS = 90_000;
/** Last evidence of a live desktop user (claim registered / typed input). */
private _lastDesktopActivityAt = 0;
/** Last desktop-typed dimensions, for re-asserting after a mobile override. */
private _lastDesktopDims: { cols: number; rows: number } | null = null;
/** True while a small viewport reflowed the pane past an idle desktop claim. */
private _mobileSizeOverride = false;
/** Register a live desktop sizing claim (see _desktopSizeClaims). */
claimDesktopSizing(token: symbol): void {
this._desktopSizeClaims.add(token);
this._lastDesktopActivityAt = Date.now();
}
/** Release a desktop sizing claim when its connection goes away. */
releaseDesktopSizing(token: symbol): void {
this._desktopSizeClaims.delete(token);
}
/**
* Record desktop user activity (typed input over a claim-holding socket).
* If a phone reflowed the pane while the desktop was idle, the desktop
* layout is restored — "whoever is actively using the session wins".
*/
noteDesktopActivity(): void {
this._lastDesktopActivityAt = Date.now();
if (this._mobileSizeOverride && this._lastDesktopDims) {
this._mobileSizeOverride = false;
this.resize(this._lastDesktopDims.cols, this._lastDesktopDims.rows, { viewportType: 'desktop' });
}
}
/**
* Resizes the PTY terminal dimensions.
* Skips the resize if dimensions haven't changed to avoid triggering
* unnecessary Ink full-screen redraws (visible flicker on tab switch).
*
* Arbitration: while a desktop connection holds a sizing claim AND has been
* active within DESKTOP_CLAIM_IDLE_MS, resizes from small viewports
* (mobile/tablet) are ignored — shrink AND grow would both reflow the
* desktop view. Once the desktop goes idle, a phone may take the pane (the
* desktop re-asserts its size on its next typed input via
* noteDesktopActivity). Without a desktop connected, small viewports
* control the PTY size freely.
*
* @param cols - Number of columns (width in characters)
* @param rows - Number of rows (height in lines)
*/
resize(cols: number, rows: number, options: { viewportType?: ResizeViewportType; force?: boolean } = {}): void {
const isSmallViewport = options.viewportType === 'mobile' || options.viewportType === 'tablet';
if (options.viewportType === 'desktop') {
this._lastDesktopDims = { cols, rows };
this._lastDesktopActivityAt = Date.now();
this._mobileSizeOverride = false;
}
if (isSmallViewport && this._desktopSizeClaims.size > 0) {
if (Date.now() - this._lastDesktopActivityAt < Session.DESKTOP_CLAIM_IDLE_MS) {
return;
}
this._mobileSizeOverride = true;
}
const dimsChanged = cols !== this._ptyCols || rows !== this._ptyRows;
if (this.ptyProcess && (dimsChanged || options.force)) {
this._ptyCols = cols;
this._ptyRows = rows;
if (this._mux && this._muxSession) {
this._mux.resizeWindow?.(this._muxSession.muxName, cols, rows);
}
this.ptyProcess.resize(cols, rows);
}
}
// Legacy method for compatibility with session-manager
async start(): Promise<void> {
this._status = 'idle';
}
// Legacy method for sending input - wraps runPrompt
async sendInput(input: string): Promise<void> {
this._status = 'busy';
this._lastActivityAt = Date.now();
this.runPrompt(input).catch((err) => {
const errorMsg = getErrorMessage(err);
// Clean up task state so the task queue doesn't get stuck
if (this._currentTaskId) {
const taskId = this._currentTaskId;
this._currentTaskId = null;
this._status = 'idle';
this._lastActivityAt = Date.now();
this.emit('taskError', taskId, errorMsg);
} else {
this._status = 'idle';
}
this.emit('error', errorMsg);
});
}
/**
* Remove event listeners from TaskTracker and RalphTracker.
* Prevents memory leaks by ensuring handlers don't persist after session stop.
*/
private cleanupTrackerListeners(): void {
// Remove TaskTracker handlers
if (this._taskTrackerHandlers) {
this._taskTracker.off('taskCreated', this._taskTrackerHandlers.taskCreated);
this._taskTracker.off('taskUpdated', this._taskTrackerHandlers.taskUpdated);
this._taskTracker.off('taskCompleted', this._taskTrackerHandlers.taskCompleted);
this._taskTracker.off('taskFailed', this._taskTrackerHandlers.taskFailed);
this._taskTrackerHandlers = null;
}
// Remove RalphTracker handlers
if (this._ralphHandlers) {
this._ralphTracker.off('loopUpdate', this._ralphHandlers.loopUpdate);
this._ralphTracker.off('todoUpdate', this._ralphHandlers.todoUpdate);
this._ralphTracker.off('completionDetected', this._ralphHandlers.completionDetected);
this._ralphTracker.off('statusBlockDetected', this._ralphHandlers.statusBlockDetected);
this._ralphTracker.off('circuitBreakerUpdate', this._ralphHandlers.circuitBreakerUpdate);
this._ralphTracker.off('exitGateMet', this._ralphHandlers.exitGateMet);
this._ralphHandlers = null;
}
// Remove BashToolParser handlers
if (this._bashToolHandlers) {
this._bashToolParser.off('toolStart', this._bashToolHandlers.toolStart);
this._bashToolParser.off('toolEnd', this._bashToolHandlers.toolEnd);
this._bashToolParser.off('toolsUpdate', this._bashToolHandlers.toolsUpdate);
this._bashToolHandlers = null;
}
// Destroy all trackers to release memory and stop timers
this._bashToolParser.destroy();
this._taskTracker.destroy();
this._ralphTracker.destroy();
}
/**
* Stops the session and cleans up resources.
*
* This kills the PTY process and optionally the associated tmux session.
* All buffers are cleared and the session is marked as stopped.
*
* @param killMux - Whether to also kill the mux session (default: true)
*
* @example
* ```typescript
* // Stop and kill everything
* await session.stop();
*
* // Stop but keep mux session running for later reattachment
* await session.stop(false);
* ```
*/
async stop(killMux: boolean = true): Promise<void> {
// Set stopped flag first to prevent new timers from being created
this._isStopped = true;
this._clearAllTimers();
// Drop desktop sizing claims defensively. Sockets normally release their
// own claim on close, but a hung client's close event can lag the session
// teardown by up to a ping cycle — don't let a stale claim suppress
// mobile resizes if this Session object sees any further use.
this._desktopSizeClaims.clear();
// Immediately cleanup Promise callbacks to prevent orphaned references
// during the rest of stop() processing (e.g., if mux kill times out)
if (this.rejectPromise && !this._promptResolved) {
this._promptResolved = true;
this.rejectPromise(new Error('Session stopped'));
}
this.resolvePromise = null;
this.rejectPromise = null;
// Remove event listeners from trackers to prevent memory leaks
this.cleanupTrackerListeners();
if (this.ptyProcess) {
if (killMux) {
// Full kill: SIGTERM → wait → SIGKILL the PTY and its children
const pid = this.ptyProcess.pid;
// First try graceful SIGTERM
try {
this.ptyProcess.kill();
} catch (err) {
console.warn('[Session] Failed to send SIGTERM to PTY process (may already be dead):', err);
}
// Give it a moment to terminate gracefully
await new Promise((resolve) => setTimeout(resolve, GRACEFUL_SHUTDOWN_DELAY_MS));
// Force kill with SIGKILL if still alive
try {
if (pid) {
process.kill(pid, 'SIGKILL');
}
} catch (err) {
console.warn('[Session] Failed to send SIGKILL to process (already terminated):', err);
}
// Also try to kill any child processes in the process group
try {
if (pid) {
process.kill(-pid, 'SIGKILL');
}
} catch (err) {
console.warn('[Session] Failed to send SIGKILL to process group (may not exist):', err);
}
} else {
// Server shutdown: just detach — the process lives on inside tmux
console.log('[Session] Detaching from PTY (server shutdown) — mux session preserved');
}
this.ptyProcess = null;
}
this._pid = null;
this._status = killMux ? 'stopped' : 'idle';
this._currentTaskId = null;
// Clear task description cache and agent tree to prevent memory leak
this._taskCache.clear();
this._childAgentIds = [];
// Kill the associated mux session if requested
if (killMux && this._mux) {
// Try to kill mux session even if _muxSession is not set (e.g., restored sessions)
try {
const killed = await this._mux.killSession(this.id);
if (killed) {
console.log('[Session] Killed mux session for:', this.id);
}
} catch (err) {
console.error('[Session] Failed to kill mux session:', err);
}
this._muxSession = null;
} else if (this._muxSession && !killMux) {
console.log('[Session] Keeping mux session alive:', this._muxSession.muxName);
this._muxSession = null; // Detach but don't kill
}
}
assignTask(taskId: string): void {
this._currentTaskId = taskId;
this._status = 'busy';
this._terminalBuffer.clear();
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._lastActivityAt = Date.now();
}
clearTask(): void {
this._currentTaskId = null;
this._status = 'idle';
this._lastActivityAt = Date.now();
}
getOutput(): string {
return this._textOutput.value;
}
getError(): string {
return this._errorBuffer;
}
getTerminalBuffer(): string {
return this._terminalBuffer.value;
}
clearBuffers(): void {
this._terminalBuffer.clear();
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._taskTracker.clear();
this._ralphTracker.clear();
this._taskCache.clear();
}
}