Files
Codeman/src/session.ts
T
arkonandClaude Opus 4.5 6c07541288 refactor: consolidate shared regex patterns and token validation
- Create src/utils/regex-patterns.ts with ANSI_ESCAPE_PATTERN_FULL,
  ANSI_ESCAPE_PATTERN_SIMPLE, TOKEN_PATTERN, and helper functions
- Create src/utils/token-validation.ts with MAX_SESSION_TOKENS and
  validation utilities
- Update session.ts, respawn-controller.ts, ai-checker-base.ts,
  ralph-tracker.ts, state-store.ts to use shared utilities
- Export all new utilities from src/utils/index.ts

Reduces code duplication while maintaining pre-compiled patterns
for performance.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-29 10:55:49 +01:00

1962 lines
69 KiB
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/**
* @fileoverview Core PTY session wrapper for Claude CLI interactions.
*
* This module provides the Session class which manages a PTY (pseudo-terminal)
* process running the Claude CLI. It supports three operation modes:
*
* 1. **One-shot mode** (`runPrompt`): Execute a single prompt and get JSON response
* 2. **Interactive mode** (`startInteractive`): Start an interactive Claude session
* 3. **Shell mode**: Run a plain bash shell for debugging/testing
*
* The session can optionally run inside a GNU Screen session for persistence
* across disconnects. It tracks tokens, costs, background tasks, and supports
* auto-clear/auto-compact functionality when token limits are approached.
*
* @module session
*/
import { EventEmitter } from 'node:events';
import { execSync } from 'node:child_process';
import { existsSync } from 'node:fs';
import { dirname } from 'node:path';
import { v4 as uuidv4 } from 'uuid';
import * as pty from 'node-pty';
import { SessionState, SessionStatus, SessionConfig, ScreenSession, RalphTrackerState, RalphTodoItem, ActiveBashTool, NiceConfig, DEFAULT_NICE_CONFIG } from './types.js';
import { TaskTracker, type BackgroundTask } from './task-tracker.js';
import { RalphTracker } from './ralph-tracker.js';
import { BashToolParser } from './bash-tool-parser.js';
import { ScreenManager } from './screen-manager.js';
import { BufferAccumulator } from './utils/buffer-accumulator.js';
import {
ANSI_ESCAPE_PATTERN_FULL,
TOKEN_PATTERN,
MAX_SESSION_TOKENS,
} 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';
export type { BackgroundTask } from './task-tracker.js';
export type { RalphTrackerState, RalphTodoItem, ActiveBashTool } from './types.js';
export { withTimeout };
/** Line buffer flush interval (100ms) - forces processing of partial lines */
const LINE_BUFFER_FLUSH_INTERVAL = 100;
// ============================================================================
// Timing Constants
// ============================================================================
/** Timeout for exec commands like 'which claude' (5 seconds) */
const EXEC_TIMEOUT_MS = 5000;
/** Delay after screen creation before sending commands (300ms) */
const SCREEN_STARTUP_DELAY_MS = 300;
/** Delay before declaring session idle after last output (2 seconds) */
const IDLE_DETECTION_DELAY_MS = 2000;
/** Delay for auto-compact/clear retry attempts (2 seconds) */
const AUTO_RETRY_DELAY_MS = 2000;
/** Delay for auto-compact/clear initial check (1 second) */
const AUTO_INITIAL_DELAY_MS = 1000;
/** 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
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;
// ============================================================================
// Claude CLI PATH Resolution
// ============================================================================
/** Common directories where the Claude CLI binary may be installed */
const CLAUDE_SEARCH_DIRS = [
`${process.env.HOME}/.local/bin`,
`${process.env.HOME}/.claude/local`,
'/usr/local/bin',
`${process.env.HOME}/.npm-global/bin`,
`${process.env.HOME}/bin`,
];
/** Cached PATH string with claude's directory prepended */
let _augmentedPath: string | null = null;
/**
* Returns a PATH string that includes the directory containing `claude`.
*
* Finds the claude binary (via `which` or common install locations), then
* prepends its directory to the current PATH if not already present.
* Result is cached for subsequent calls.
*/
export function getAugmentedPath(): string {
if (_augmentedPath) return _augmentedPath;
const currentPath = process.env.PATH || '';
let claudeDir: string | null = null;
// Try `which` first (respects current PATH)
try {
const result = execSync('which claude', { encoding: 'utf-8', timeout: EXEC_TIMEOUT_MS }).trim();
if (result && existsSync(result)) {
claudeDir = dirname(result);
}
} catch {
// not in PATH, check common locations
}
// Fallback: check common installation directories
if (!claudeDir) {
for (const dir of CLAUDE_SEARCH_DIRS) {
if (existsSync(`${dir}/claude`)) {
claudeDir = dir;
break;
}
}
}
if (claudeDir && !currentPath.split(':').includes(claudeDir)) {
_augmentedPath = `${claudeDir}:${currentPath}`;
console.log('[Session] Augmented PATH with claude directory:', claudeDir);
} else {
_augmentedPath = currentPath;
}
return _augmentedPath;
}
/**
* Wraps a promise with a timeout to prevent indefinite hangs.
* If the promise doesn't resolve within the timeout, rejects with TimeoutError.
*
* @param promise - The promise to wrap
* @param timeoutMs - Timeout in milliseconds
* @param operation - Description of the operation for error messages
* @returns Promise that resolves/rejects with the original result or timeout error
*/
function withTimeout<T>(
promise: Promise<T>,
timeoutMs: number,
operation: string
): Promise<T> {
let timeoutId: NodeJS.Timeout;
const timeoutPromise = new Promise<never>((_, reject) => {
timeoutId = setTimeout(() => {
reject(new Error(`${operation} timed out after ${timeoutMs}ms`));
}, timeoutMs);
});
return Promise.race([promise, timeoutPromise]).finally(() => {
clearTimeout(timeoutId);
});
}
/**
* 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)`.
*/
export interface SessionEvents {
/** Processed text output (ANSI stripped) */
output: (data: string) => void;
/** Parsed JSON message from Claude CLI */
message: (msg: ClaudeMessage) => void;
/** Error output from the session */
error: (data: string) => void;
/** Session process exited */
exit: (code: number | null) => void;
/** One-shot prompt completed with result and cost */
completion: (result: string, cost: number) => void;
/** Raw terminal data (includes ANSI codes) */
terminal: (data: string) => void;
/** Signal to clear terminal display (after screen attach) */
clearTerminal: () => void;
/** New background task started */
taskCreated: (task: BackgroundTask) => void;
/** Background task status changed */
taskUpdated: (task: BackgroundTask) => void;
/** Background task finished successfully */
taskCompleted: (task: BackgroundTask) => void;
/** Background task failed with error */
taskFailed: (task: BackgroundTask, error: string) => void;
/** Auto-clear triggered due to token threshold */
autoClear: (data: { tokens: number; threshold: number }) => void;
/** Auto-compact triggered due to token threshold */
autoCompact: (data: { tokens: number; threshold: number; prompt?: string }) => void;
/** Ralph loop state changed */
ralphLoopUpdate: (state: RalphTrackerState) => void;
/** Ralph todo list updated */
ralphTodoUpdate: (todos: RalphTodoItem[]) => void;
/** Ralph completion phrase detected */
ralphCompletionDetected: (phrase: string) => void;
/** RALPH_STATUS block detected */
ralphStatusBlockDetected: (block: import('./types.js').RalphStatusBlock) => void;
/** Circuit breaker state changed */
ralphCircuitBreakerUpdate: (status: import('./types.js').CircuitBreakerStatus) => void;
/** Dual-condition exit gate met */
ralphExitGateMet: (data: { completionIndicators: number; exitSignal: boolean }) => void;
/** Bash tool with file paths started */
bashToolStart: (tool: ActiveBashTool) => void;
/** Bash tool completed */
bashToolEnd: (tool: ActiveBashTool) => void;
/** Active Bash tools list updated */
bashToolsUpdate: (tools: ActiveBashTool[]) => void;
}
/**
* Session operation mode.
* - `'claude'`: Runs Claude CLI for AI interactions (default)
* - `'shell'`: Runs a plain bash shell for debugging/testing
*/
export type SessionMode = 'claude' | 'shell';
/**
* 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',
* screenManager: screenManager,
* useScreen: 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;
private _name: string;
private ptyProcess: pty.IPty | null = null;
private _pid: number | null = null;
private _status: SessionStatus = 'idle';
private _currentTaskId: string | null = null;
// Use BufferAccumulator for hot-path buffers to reduce GC pressure
private _terminalBuffer = new BufferAccumulator(MAX_TERMINAL_BUFFER_SIZE, TERMINAL_BUFFER_TRIM_SIZE);
private _outputBuffer: string = '';
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;
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 _taskTracker: TaskTracker;
// Token tracking for auto-clear
private _totalInputTokens: number = 0;
private _totalOutputTokens: number = 0;
private _autoClearThreshold: number = 140000; // Default 140k tokens
private _autoClearEnabled: boolean = false;
private _isClearing: boolean = false; // Prevent recursive clearing
// Auto-compact settings
private _autoCompactThreshold: number = 110000; // Default 110k tokens (lower than clear)
private _autoCompactEnabled: boolean = false;
private _autoCompactPrompt: string = ''; // Optional prompt for compact
private _isCompacting: boolean = false; // Prevent recursive compacting
// Image watcher setting (per-session toggle)
private _imageWatcherEnabled: boolean = true;
// Timer tracking for cleanup (prevents memory leaks)
private _autoCompactTimer: NodeJS.Timeout | null = null;
private _autoClearTimer: NodeJS.Timeout | null = null;
private _promptCheckInterval: NodeJS.Timeout | null = null;
private _promptCheckTimeout: NodeJS.Timeout | null = null;
private _shellIdleTimer: NodeJS.Timeout | null = null;
// Screen session support
private _screenManager: ScreenManager | null = null;
private _screenSession: ScreenSession | null = null;
private _useScreen: 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[] = [];
// Nice prioritying configuration
private _niceConfig: NiceConfig = { ...DEFAULT_NICE_CONFIG };
// 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 (e.g., "Explore(Description)")
// Used to correlate with SubagentWatcher discoveries for better window titles
private _recentTaskDescriptions: Map<number, string> = new Map(); // timestamp -> description
private static readonly TASK_DESCRIPTION_MAX_AGE_MS = 30000; // Keep descriptions for 30 seconds
constructor(config: Partial<SessionConfig> & {
workingDir: string;
mode?: SessionMode;
name?: string;
screenManager?: ScreenManager;
useScreen?: boolean;
screenSession?: ScreenSession; // For restored sessions - pass the existing screen
niceConfig?: NiceConfig; // Nice prioritying configuration
}) {
super();
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._lastActivityAt = this.createdAt;
this._screenManager = config.screenManager || null;
this._useScreen = config.useScreen ?? (this._screenManager !== null && ScreenManager.isScreenAvailable());
this._screenSession = config.screenSession || null; // Use existing screen if provided
// Apply Nice priority configuration if provided
if (config.niceConfig) {
this._niceConfig = { ...config.niceConfig };
}
// 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);
}
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 outputBuffer(): string {
return this._outputBuffer;
}
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;
}
get totalCost(): number {
return this._totalCost;
}
get messages(): ClaudeMessage[] {
return this._messages;
}
get isWorking(): boolean {
return this._isWorking;
}
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 };
}
/**
* 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));
}
}
// 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 values
if (inputTokens > MAX_SESSION_TOKENS || outputTokens > MAX_SESSION_TOKENS) {
console.warn(`[Session ${this.id}] Rejected absurd restored tokens: input=${inputTokens}, output=${outputTokens}`);
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._autoClearThreshold;
}
get autoClearEnabled(): boolean {
return this._autoClearEnabled;
}
get name(): string {
return this._name;
}
set name(value: string) {
this._name = value;
}
setAutoClear(enabled: boolean, threshold?: number): void {
this._autoClearEnabled = enabled;
if (threshold !== undefined) {
this._autoClearThreshold = threshold;
}
}
get autoCompactThreshold(): number {
return this._autoCompactThreshold;
}
get autoCompactEnabled(): boolean {
return this._autoCompactEnabled;
}
get autoCompactPrompt(): string {
return this._autoCompactPrompt;
}
setAutoCompact(enabled: boolean, threshold?: number, prompt?: string): void {
this._autoCompactEnabled = enabled;
if (threshold !== undefined) {
this._autoCompactThreshold = threshold;
}
if (prompt !== undefined) {
this._autoCompactPrompt = prompt;
}
}
get imageWatcherEnabled(): boolean {
return this._imageWatcherEnabled;
}
set imageWatcherEnabled(enabled: boolean) {
this._imageWatcherEnabled = enabled;
}
isIdle(): boolean {
return this._status === 'idle';
}
isBusy(): boolean {
return this._status === 'busy';
}
isRunning(): boolean {
return this._status === 'idle' || this._status === 'busy';
}
toState(): SessionState {
return {
id: this.id,
pid: this.pid,
status: this._status,
workingDir: this.workingDir,
currentTaskId: this._currentTaskId,
createdAt: this.createdAt,
lastActivityAt: this._lastActivityAt,
name: this._name,
mode: this.mode,
autoClearEnabled: this._autoClearEnabled,
autoClearThreshold: this._autoClearThreshold,
autoCompactEnabled: this._autoCompactEnabled,
autoCompactThreshold: this._autoCompactThreshold,
autoCompactPrompt: this._autoCompactPrompt,
imageWatcherEnabled: this._imageWatcherEnabled,
totalCost: this._totalCost,
inputTokens: this._totalInputTokens,
outputTokens: this._totalOutputTokens,
ralphEnabled: this._ralphTracker.enabled,
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,
};
}
toDetailedState() {
return {
...this.toState(),
name: this._name,
mode: this.mode,
claudeSessionId: this._claudeSessionId,
totalCost: this._totalCost,
textOutput: this._textOutput.value,
terminalBuffer: this._terminalBuffer.value,
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
taskStats: this._taskTracker.getStats(),
taskTree: this._taskTracker.getTaskTree(),
// Token tracking
tokens: {
input: this._totalInputTokens,
output: this._totalOutputTokens,
total: this._totalInputTokens + this._totalOutputTokens,
},
autoClear: {
enabled: this._autoClearEnabled,
threshold: this._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 with `--dangerously-skip-permissions` flag in
* interactive mode. If screen wrapping is enabled, the session runs inside
* a GNU Screen session for persistence across disconnects.
*
* @throws {Error} If a process is already running in this session
*
* @example
* ```typescript
* const session = new Session({ workingDir: '/project', useScreen: true });
* await session.startInteractive();
* session.on('terminal', (data) => process.stdout.write(data));
* session.write('help me with this code\r');
* ```
*/
async startInteractive(): Promise<void> {
if (this.ptyProcess) {
throw new Error('Session already has a running process');
}
this._status = 'busy';
this._terminalBuffer.clear();
this._outputBuffer = '';
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._lineBuffer = '';
this._lastActivityAt = Date.now();
console.log('[Session] Starting interactive Claude session' + (this._useScreen ? ' (with screen)' : ''));
// If screen wrapping is enabled, create or attach to a screen session
if (this._useScreen && this._screenManager) {
try {
// Check if we already have a screen session (restored session)
const isRestoredSession = this._screenSession !== null;
if (isRestoredSession) {
console.log('[Session] Attaching to existing screen session:', this._screenSession!.screenName);
} else {
// Create a new screen session
this._screenSession = await this._screenManager.createScreen(this.id, this.workingDir, 'claude', this._name, this._niceConfig);
console.log('[Session] Created screen session:', this._screenSession.screenName);
// Wait a moment for screen to fully start
await new Promise(resolve => setTimeout(resolve, SCREEN_STARTUP_DELAY_MS));
}
// Attach to the screen session via PTY
try {
this.ptyProcess = pty.spawn('screen', [
'-x', this._screenSession!.screenName
], {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: { ...process.env, TERM: 'xterm-256color' },
});
} catch (spawnErr) {
console.error('[Session] Failed to spawn PTY for screen attachment:', spawnErr);
this.emit('error', `Failed to attach to screen: ${spawnErr}`);
throw spawnErr;
}
// For NEW screens: wait for prompt to appear then clean buffer
// For RESTORED screens: don't do anything - client will fetch buffer on tab switch
if (!isRestoredSession) {
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 screen 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(/^(\x1b\[\??[\d;]*[A-Za-z]|[\s\r\n])+/, '')
);
// 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 screen session, falling back to direct PTY:', err);
this._useScreen = false;
this._screenSession = null;
}
}
// Fallback to direct PTY if screen is not used
if (!this.ptyProcess) {
try {
this.ptyProcess = pty.spawn('claude', [
'--dangerously-skip-permissions'
], {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: {
...process.env,
PATH: getAugmentedPath(),
TERM: 'xterm-256color',
// Inform Claude it's running within Claudeman (helps prevent self-termination)
CLAUDEMAN_SCREEN: '1',
CLAUDEMAN_SESSION_ID: this.id,
CLAUDEMAN_API_URL: process.env.CLAUDEMAN_API_URL || 'http://localhost:3000',
},
});
} 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}`);
}
}
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(/\x0c/g, ''); // Remove Ctrl+L
if (!data) return; // Skip if only filtered sequences
// BufferAccumulator handles auto-trimming when max size exceeded
this._terminalBuffer.append(data);
this._lastActivityAt = Date.now();
this.emit('terminal', data);
this.emit('output', data);
// Forward to Ralph tracker to detect Ralph loops and todos
this._ralphTracker.processTerminalData(data);
// Forward to Bash tool parser to detect file-viewing commands
this._bashToolParser.processTerminalData(data);
// Parse token count from status line (e.g., "123.4k tokens" or "5234 tokens")
this.parseTokensFromStatusLine(data);
// Parse task descriptions from terminal output (e.g., "Explore(Check files)")
// This enables correlating subagent windows with their short descriptions
this.parseTaskDescriptionsFromTerminalData(data);
// 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)
// Strip ANSI/OSC sequences to avoid false positives from window titles like "3 File Reading Task"
const cleanDataForWorkingCheck = data.replace(ANSI_ESCAPE_PATTERN_FULL, '');
if (cleanDataForWorkingCheck.includes('Thinking') || cleanDataForWorkingCheck.includes('Writing') ||
cleanDataForWorkingCheck.includes('Reading') || cleanDataForWorkingCheck.includes('Running') ||
cleanDataForWorkingCheck.includes('⠋') || cleanDataForWorkingCheck.includes('⠙') ||
cleanDataForWorkingCheck.includes('⠹') || cleanDataForWorkingCheck.includes('⠸') ||
cleanDataForWorkingCheck.includes('⠼') || cleanDataForWorkingCheck.includes('⠴') ||
cleanDataForWorkingCheck.includes('⠦') || cleanDataForWorkingCheck.includes('⠧')) {
if (!this._isWorking) {
this._isWorking = true;
this._status = 'busy';
this.emit('working');
}
// Reset timeout and idle confirmation flag since Claude is active
this._awaitingIdleConfirmation = false;
if (this.activityTimeout) clearTimeout(this.activityTimeout);
}
});
this.ptyProcess.onExit(({ exitCode }) => {
console.log('[Session] Interactive PTY exited with code:', exitCode);
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;
}
// If using screen, mark the screen as detached but don't kill it
if (this._screenSession && this._screenManager) {
this._screenManager.setAttached(this.id, false);
}
this.emit('exit', exitCode);
});
}
/**
* 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._status = 'busy';
this._terminalBuffer.clear();
this._outputBuffer = '';
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._lineBuffer = '';
this._lastActivityAt = Date.now();
// Use user's default shell or bash
const shell = process.env.SHELL || '/bin/bash';
console.log('[Session] Starting shell session with:', shell + (this._useScreen ? ' (with screen)' : ''));
// If screen wrapping is enabled, create or attach to a screen session
if (this._useScreen && this._screenManager) {
try {
// Check if we already have a screen session (restored session)
const isRestoredSession = this._screenSession !== null;
if (isRestoredSession) {
console.log('[Session] Attaching to existing screen session:', this._screenSession!.screenName);
} else {
// Create a new screen session
this._screenSession = await this._screenManager.createScreen(this.id, this.workingDir, 'shell', this._name, this._niceConfig);
console.log('[Session] Created screen session:', this._screenSession.screenName);
// Wait a moment for screen to fully start
await new Promise(resolve => setTimeout(resolve, SCREEN_STARTUP_DELAY_MS));
}
// Attach to the screen session via PTY
try {
this.ptyProcess = pty.spawn('screen', [
'-x', this._screenSession!.screenName
], {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: { ...process.env, TERM: 'xterm-256color' },
});
} catch (spawnErr) {
console.error('[Session] Failed to spawn PTY for shell screen attachment:', spawnErr);
this.emit('error', `Failed to attach to screen: ${spawnErr}`);
throw spawnErr;
}
// For NEW screens: clear by sending 'clear' command to the shell
// For RESTORED screens: don't clear - we want to see the existing output
if (!isRestoredSession) {
setTimeout(() => {
if (this.ptyProcess) {
this._terminalBuffer.clear();
this.ptyProcess.write('clear\n');
}
}, 100);
}
} catch (err) {
console.error('[Session] Failed to create screen session, falling back to direct PTY:', err);
this._useScreen = false;
this._screenSession = null;
}
}
// Fallback to direct PTY if screen is not used
if (!this.ptyProcess) {
try {
this.ptyProcess = pty.spawn(shell, [], {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: {
...process.env,
TERM: 'xterm-256color',
CLAUDEMAN_SCREEN: '1',
CLAUDEMAN_SESSION_ID: this.id,
CLAUDEMAN_API_URL: process.env.CLAUDEMAN_API_URL || 'http://localhost:3000',
},
});
} 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
// BufferAccumulator handles auto-trimming when max size exceeded
this._terminalBuffer.append(data);
this._lastActivityAt = Date.now();
this.emit('terminal', data);
this.emit('output', 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 screen, mark the screen as detached but don't kill it
if (this._screenSession && this._screenManager) {
this._screenManager.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._status = 'busy';
this._terminalBuffer.clear();
this._outputBuffer = '';
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._lineBuffer = '';
this._lastActivityAt = Date.now();
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 = [
'-p',
'--dangerously-skip-permissions',
'--output-format', 'stream-json',
];
if (model) {
args.push('--model', model);
}
args.push(prompt);
try {
this.ptyProcess = pty.spawn('claude', args, {
name: 'xterm-256color',
cols: 120,
rows: 40,
cwd: this.workingDir,
env: {
...process.env,
PATH: getAugmentedPath(),
TERM: 'xterm-256color',
// Inform Claude it's running within Claudeman
CLAUDEMAN_SCREEN: '1',
CLAUDEMAN_SESSION_ID: this.id,
CLAUDEMAN_API_URL: process.env.CLAUDEMAN_API_URL || 'http://localhost:3000',
},
});
} 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
// BufferAccumulator handles auto-trimming when max size exceeded
this._terminalBuffer.append(data);
this._lastActivityAt = Date.now();
this.emit('terminal', data);
this.emit('output', 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;
this.emit('completion', resultMsg.result || '', cost);
if (resolve) {
resolve({ result: resultMsg.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);
}
});
}
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('}')) {
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));
}
if (msg.type === 'system' && msg.session_id) {
this._claudeSessionId = msg.session_id;
}
// 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.checkAutoCompact();
this.checkAutoClear();
}
}
if (msg.type === 'result' && msg.total_cost_usd) {
this._totalCost = msg.total_cost_usd;
}
} catch {
// Not JSON, just regular output
this._textOutput.append(line + '\n');
}
} 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
this.parseTaskDescriptionsFromLine(cleanLine);
}
// Note: BufferAccumulator auto-trims when max size exceeded
}
/**
* Parse task descriptions from raw terminal data (may contain multiple lines).
* Called from interactive mode's onData handler.
*/
private parseTaskDescriptionsFromTerminalData(data: string): void {
// Quick pre-check: skip if no parentheses present
if (!data.includes('(') || !data.includes(')')) return;
// Split by newlines and process each line
const lines = data.split(/\r?\n/);
for (const line of lines) {
this.parseTaskDescriptionsFromLine(line);
}
}
/**
* Parse task descriptions from terminal output.
* Claude Code outputs Task tool calls as "ToolName(Description)" in the terminal.
* We capture these descriptions to use as window titles for subagents.
*/
private parseTaskDescriptionsFromLine(line: string): void {
// Quick pre-check: skip expensive regex if no common tool patterns present
if (!line.includes('(') || !line.includes(')')) return;
// Strip ANSI codes before matching - terminal output has embedded codes like [1mExplore[0m
const cleanLine = line.replace(ANSI_ESCAPE_PATTERN_FULL, '');
// Reset regex lastIndex for global pattern
TASK_TOOL_PATTERN.lastIndex = 0;
let match;
while ((match = TASK_TOOL_PATTERN.exec(cleanLine)) !== null) {
const description = match[2].trim();
if (description && description.length > 0) {
const now = Date.now();
this._recentTaskDescriptions.set(now, description);
// Cleanup old entries
this.cleanupOldTaskDescriptions();
}
}
}
/** Maximum number of task descriptions to keep */
private static readonly MAX_TASK_DESCRIPTIONS = 100;
/**
* Remove task descriptions older than TASK_DESCRIPTION_MAX_AGE_MS.
* Also enforces MAX_TASK_DESCRIPTIONS size limit.
*/
private cleanupOldTaskDescriptions(): void {
const cutoff = Date.now() - Session.TASK_DESCRIPTION_MAX_AGE_MS;
// Collect keys to delete first, then delete (avoids modifying Map during iteration)
const keysToDelete: number[] = [];
for (const [timestamp] of this._recentTaskDescriptions) {
if (timestamp < cutoff) {
keysToDelete.push(timestamp);
}
}
for (const key of keysToDelete) {
this._recentTaskDescriptions.delete(key);
}
// Enforce size limit by removing oldest entries
if (this._recentTaskDescriptions.size > Session.MAX_TASK_DESCRIPTIONS) {
const sortedKeys = Array.from(this._recentTaskDescriptions.keys()).sort((a, b) => a - b);
const keysToRemove = sortedKeys.slice(0, this._recentTaskDescriptions.size - Session.MAX_TASK_DESCRIPTIONS);
for (const key of keysToRemove) {
this._recentTaskDescriptions.delete(key);
}
}
}
/**
* Get recent task descriptions parsed from terminal output.
* Returns descriptions sorted by timestamp (most recent first).
*/
getRecentTaskDescriptions(): Array<{ timestamp: number; description: string }> {
this.cleanupOldTaskDescriptions();
const results: Array<{ timestamp: number; description: string }> = [];
for (const [timestamp, description] of this._recentTaskDescriptions) {
results.push({ timestamp, description });
}
return results.sort((a, b) => b.timestamp - a.timestamp);
}
/**
* 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 {
this.cleanupOldTaskDescriptions();
// Find the most recent description that was parsed before or around the subagent start time
let bestMatch: { timestamp: number; description: string } | undefined;
let bestDiff = Infinity;
for (const [timestamp, description] of this._recentTaskDescriptions) {
const diff = Math.abs(subagentStartTime - timestamp);
if (diff < maxAgeMs && diff < bestDiff) {
bestMatch = { timestamp, description };
bestDiff = diff;
}
}
return bestMatch?.description;
}
// 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(data: string): void {
// Quick pre-check: skip expensive regex if "token" not present (performance optimization)
if (!data.includes('token')) return;
// Remove ANSI escape codes for cleaner parsing (use pre-compiled pattern)
const cleanData = data.replace(ANSI_ESCAPE_PATTERN_FULL, '');
// Match patterns: "123.4k tokens", "5234 tokens", "1.2M tokens"
// The status line typically shows total tokens like "1.2k tokens" near the prompt
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.checkAutoCompact();
this.checkAutoClear();
}
}
}
// Check if we should auto-compact based on token threshold
private checkAutoCompact(): void {
if (!this._autoCompactEnabled || this._isCompacting || this._isClearing || this._isStopped) return;
const totalTokens = this._totalInputTokens + this._totalOutputTokens;
if (totalTokens >= this._autoCompactThreshold) {
this._isCompacting = true;
console.log(`[Session] Auto-compact triggered: ${totalTokens} tokens >= ${this._autoCompactThreshold} threshold`);
// Wait for Claude to be idle before compacting
const checkAndCompact = () => {
// Check if session is still valid (not stopped)
if (!this._isCompacting || this._isStopped) return;
if (!this._isWorking) {
// Send /compact command with optional prompt
const compactCmd = this._autoCompactPrompt
? `/compact ${this._autoCompactPrompt}\r`
: '/compact\r';
this.writeViaScreen(compactCmd);
this.emit('autoCompact', {
tokens: totalTokens,
threshold: this._autoCompactThreshold,
prompt: this._autoCompactPrompt || undefined
});
// Wait a moment then re-enable (longer than clear since compact takes time)
if (!this._isStopped) {
this._autoCompactTimer = setTimeout(() => {
this._autoCompactTimer = null;
this._isCompacting = false;
}, 10000);
}
} else {
// Check again after delay
if (!this._isStopped) {
this._autoCompactTimer = setTimeout(checkAndCompact, AUTO_RETRY_DELAY_MS);
}
}
};
// Start checking after a short delay
if (!this._isStopped) {
this._autoCompactTimer = setTimeout(checkAndCompact, AUTO_INITIAL_DELAY_MS);
}
}
}
// Check if we should auto-clear based on token threshold
private checkAutoClear(): void {
if (!this._autoClearEnabled || this._isClearing || this._isCompacting || this._isStopped) return;
const totalTokens = this._totalInputTokens + this._totalOutputTokens;
if (totalTokens >= this._autoClearThreshold) {
this._isClearing = true;
console.log(`[Session] Auto-clear triggered: ${totalTokens} tokens >= ${this._autoClearThreshold} threshold`);
// Wait for Claude to be idle before clearing
const checkAndClear = () => {
// Check if session is still valid (not stopped)
if (!this._isClearing || this._isStopped) return;
if (!this._isWorking) {
// Send /clear command
this.writeViaScreen('/clear\r');
// Reset token counts
this._totalInputTokens = 0;
this._totalOutputTokens = 0;
this.emit('autoClear', { tokens: totalTokens, threshold: this._autoClearThreshold });
// Wait a moment then re-enable
if (!this._isStopped) {
this._autoClearTimer = setTimeout(() => {
this._autoClearTimer = null;
this._isClearing = false;
}, 5000);
}
} else {
// Check again after delay
if (!this._isStopped) {
this._autoClearTimer = setTimeout(checkAndClear, AUTO_RETRY_DELAY_MS);
}
}
};
// Start checking after a short delay
if (!this._isStopped) {
this._autoClearTimer = setTimeout(checkAndClear, AUTO_INITIAL_DELAY_MS);
}
}
}
/**
* 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 {
if (this.ptyProcess) {
this.ptyProcess.write(data);
}
}
/**
* Sends input via GNU Screen's `screen -X stuff` command.
*
* More reliable than direct PTY write for programmatic input, especially
* with Claude CLI which uses Ink (React for terminals). Text and Enter
* are sent as separate commands internally.
*
* @param data - Input data with optional `\r` for Enter
* @returns true if input was sent, false if no screen session or PTY
*
* @example
* ```typescript
* session.writeViaScreen('/clear\r'); // Send /clear command
* session.writeViaScreen('/init\r'); // Send /init command
* ```
*/
writeViaScreen(data: string): boolean {
if (this._screenManager && this._screenSession) {
return this._screenManager.sendInput(this.id, data);
}
// Fallback to PTY write
if (this.ptyProcess) {
this.ptyProcess.write(data);
return true;
}
return false;
}
/**
* Resizes the PTY terminal dimensions.
*
* Call this when the frontend terminal is resized to keep PTY in sync.
*
* @param cols - Number of columns (width in characters)
* @param rows - Number of rows (height in lines)
*/
resize(cols: number, rows: number): void {
if (this.ptyProcess) {
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 => {
this.emit('error', err.message);
});
}
/**
* 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;
}
this._bashToolParser.destroy();
}
/**
* Stops the session and cleans up resources.
*
* This kills the PTY process and optionally the associated GNU Screen
* session. All buffers are cleared and the session is marked as stopped.
*
* @param killScreen - Whether to also kill the screen session (default: true)
*
* @example
* ```typescript
* // Stop and kill everything
* await session.stop();
*
* // Stop but keep screen running for later reattachment
* await session.stop(false);
* ```
*/
async stop(killScreen: boolean = true): Promise<void> {
// Set stopped flag first to prevent new timers from being created
this._isStopped = true;
// 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;
}
// Clear auto-compact/auto-clear timers to prevent memory leaks
if (this._autoCompactTimer) {
clearTimeout(this._autoCompactTimer);
this._autoCompactTimer = null;
}
this._isCompacting = false;
if (this._autoClearTimer) {
clearTimeout(this._autoClearTimer);
this._autoClearTimer = null;
}
this._isClearing = false;
// 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;
}
// Immediately cleanup Promise callbacks to prevent orphaned references
// during the rest of stop() processing (e.g., if screen kill times out)
if (this.rejectPromise) {
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) {
const pid = this.ptyProcess.pid;
// First try graceful SIGTERM
try {
this.ptyProcess.kill();
} catch {
// Process may already be dead
}
// 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 {
// Process already terminated
}
// Also try to kill any child processes in the process group
try {
if (pid) {
process.kill(-pid, 'SIGKILL');
}
} catch {
// Process group may not exist or already terminated
}
this.ptyProcess = null;
}
this._pid = null;
this._status = 'stopped';
this._currentTaskId = null;
// Kill the associated screen session if requested
if (killScreen && this._screenManager) {
// Try to kill screen even if _screenSession is not set (e.g., restored sessions)
try {
const killed = await this._screenManager.killScreen(this.id);
if (killed) {
console.log('[Session] Killed screen session for:', this.id);
}
} catch (err) {
console.error('[Session] Failed to kill screen session:', err);
}
this._screenSession = null;
} else if (this._screenSession && !killScreen) {
console.log('[Session] Keeping screen session alive:', this._screenSession.screenName);
this._screenSession = null; // Detach but don't kill
}
}
assignTask(taskId: string): void {
this._currentTaskId = taskId;
this._status = 'busy';
this._terminalBuffer.clear();
this._outputBuffer = '';
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._outputBuffer = '';
this._textOutput.clear();
this._errorBuffer = '';
this._messages = [];
this._taskTracker.clear();
this._ralphTracker.clear();
}
}