Codeman/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Claudeman is a Claude Code session manager with a web interface and autonomous Ralph Loop. It spawns Claude CLI processes via PTY, streams output in real-time via SSE, and supports scheduled/timed runs.

Tech Stack: TypeScript, Node.js, Fastify, Server-Sent Events, node-pty

Requirements: Node.js 18+, Claude CLI (claude) installed and available in PATH

Commands

npm run build          # Compile TypeScript + copy static files to dist/web/
npm run clean          # Remove dist/

# Start web server (pick one):
npx tsx src/index.ts web           # Dev mode - no build needed (RECOMMENDED)
npx tsx src/index.ts web -p 8080   # Dev mode with custom port
node dist/index.js web             # After npm run build
claudeman web                      # After npm link

# NOTE: `npm run dev` runs the CLI (shows help), NOT the web server
# You must specify the `web` subcommand to start the server

Architecture

src/
├── index.ts              # CLI entry point (commander)
├── cli.ts                # CLI command implementations
├── session.ts            # Core: PTY wrapper for Claude CLI + token tracking
├── session-manager.ts    # Manages multiple sessions
├── screen-manager.ts     # GNU screen session persistence + process stats
├── respawn-controller.ts # Auto-respawn state machine
├── task-tracker.ts       # Background task detection and tree display
├── ralph-loop.ts         # Autonomous task assignment
├── task.ts / task-queue.ts # Priority queue with dependencies
├── state-store.ts        # Persistence to ~/.claudeman/state.json
├── types.ts              # All TypeScript interfaces
├── web/
│   ├── server.ts         # Fastify REST API + SSE + session restoration
│   └── public/           # Static frontend files
└── templates/
    └── claude-md.ts      # CLAUDE.md generator for new cases

Data Flow

1. Session spawns claude -p --dangerously-skip-permissions via node-pty
2. PTY output is buffered, ANSI stripped, and parsed for JSON messages
3. WebServer broadcasts events to SSE clients at /api/events
4. State persists to ~/.claudeman/state.json via StateStore

Key Components

• Session (src/session.ts): Wraps Claude CLI as PTY subprocess. Two modes: runPrompt(prompt) for one-shot execution, startInteractive() for persistent terminal. Emits output, terminal, message, completion, exit, idle, working, autoClear events. Maintains terminal buffer for reconnections. Includes buffer management for long-running sessions (12-24+ hours) with automatic trimming. Tracks input/output tokens and supports auto-clear at configurable threshold.

• TaskTracker (src/task-tracker.ts): Detects Claude's background Task tool usage from JSON output. Builds a tree of parent-child task relationships. Emits taskCreated, taskUpdated, taskCompleted, taskFailed events. Used by Session to track background work.

• RespawnController (src/respawn-controller.ts): State machine that keeps interactive sessions productive. Detects idle → sends update prompt → optionally /clear → optionally /init → repeats. Configurable timeouts, prompts, and step toggles.

• RalphLoop (src/ralph-loop.ts): Autonomous task assignment controller. Monitors sessions for idle state, assigns tasks from queue, detects completion via <promise>PHRASE</promise> markers. Supports time-aware loops with minimum duration.

• WebServer (src/web/server.ts): Fastify server with REST API + SSE. Manages sessions, scheduled runs, respawn controllers, and case directories. Broadcasts all events to connected clients. Restores screen sessions on startup.

• ScreenManager (src/screen-manager.ts): Manages GNU screen sessions for persistent terminals. Tracks screens in ~/.claudeman/screens.json. Provides process stats (memory, CPU, children) and reconciliation for dead screens. Screens survive server restarts.

Type Definitions

All TypeScript interfaces are centralized in src/types.ts:

• SessionState, TaskState, RalphLoopState - Core state types
• RespawnConfig, AppConfig - Configuration types
• ApiErrorCode, createErrorResponse() - Consistent API error handling
• Request/Response types for API endpoints (CreateSessionRequest, QuickStartResponse, etc.)

Session Modes

One-Shot Mode (runPrompt(prompt)):

• Execute a single prompt and receive completion event
• Used for scheduled runs and quick API calls
• Session exits after prompt completes

Interactive Mode (startInteractive()):

• Persistent PTY terminal with full Claude CLI access
• Supports terminal resize for proper formatting
• Terminal buffer persisted for client reconnections
• Works with RespawnController for autonomous cycling

Shell Mode (startShell()):

• Plain bash/zsh terminal without Claude
• Useful for running commands alongside Claude sessions
• Same PTY features (resize, buffer persistence)

Code Patterns

Claude Message Parsing

Claude CLI outputs newline-delimited JSON. Strip ANSI codes before parsing:

const cleanLine = line.replace(/\x1b\[[0-9;]*m/g, '');
const msg = JSON.parse(cleanLine) as ClaudeMessage;
// msg.type: 'system' | 'assistant' | 'user' | 'result'
// msg.message?.content: Array<{ type: 'text', text: string }>
// msg.total_cost_usd: number (on result messages)

PTY Spawn Modes

One-shot mode (prompt execution with JSON output for token tracking):

pty.spawn('claude', ['-p', '--dangerously-skip-permissions', '--output-format', 'stream-json', prompt], { ... })

Interactive mode (persistent terminal, tokens parsed from status line):

pty.spawn('claude', ['--dangerously-skip-permissions'], { ... })

Idle Detection

Session detects idle by watching for prompt character (❯ or \u276f) and waiting 2 seconds without activity. RespawnController uses the same patterns plus spinner characters to detect working state.

Long-Running Session Support

Sessions are optimized for 12-24+ hour runs with automatic buffer management:

Buffer Limits:

• Terminal buffer: 5MB max, trims to 4MB when exceeded
• Text output: 2MB max, trims to 1.5MB when exceeded
• Messages: 1000 max, keeps most recent 800 when exceeded

Performance Optimizations:

• Server-side terminal batching at 60fps (16ms intervals)
• Client-side requestAnimationFrame batching for smooth rendering
• Buffer statistics available via session details for monitoring

Buffer Stats Response:

{
  bufferStats: {
    terminalBufferSize: number;  // Current terminal buffer size in bytes
    textOutputSize: number;      // Current text output size in bytes
    messageCount: number;        // Number of parsed messages
    maxTerminalBuffer: number;   // Max allowed terminal buffer
    maxTextOutput: number;       // Max allowed text output
    maxMessages: number;         // Max allowed messages
  }
}

Respawn Controller State Machine

WATCHING → SENDING_UPDATE → WAITING_UPDATE → SENDING_CLEAR → WAITING_CLEAR → SENDING_INIT → WAITING_INIT → WATCHING

Default config (RespawnConfig in src/types.ts):

• idleTimeoutMs: 5000 (5s after prompt)
• updatePrompt: "update all the docs and CLAUDE.md"
• interStepDelayMs: 1000 (1s between steps)
• sendClear: true (send /clear after update)
• sendInit: true (send /init after /clear)

Token Tracking & Auto-Clear

Session tracks input/output tokens differently depending on mode:

One-shot mode (runPrompt): Uses --output-format stream-json to get JSON output with detailed token usage from msg.message.usage.input_tokens and output_tokens.

Interactive mode (startInteractive): Parses tokens from Claude's status line display (e.g., "123.4k tokens"). Since only total is shown, estimates 60/40 input/output split.

{
  tokens: {
    input: number;   // Total input tokens used
    output: number;  // Total output tokens used
    total: number;   // Combined total
  },
  autoClear: {
    enabled: boolean;    // Whether auto-clear is active
    threshold: number;   // Token threshold (default 100000)
  }
}

When enabled, auto-clear waits for idle state, sends /clear, and resets token counts.

SSE Event Catalog

All events are broadcast to clients connected to /api/events. Event format: { type: string, sessionId?: string, data: any }.

Session Events:

Event	Data	Description
session:created	{ session }	New session created
session:deleted	{ id }	Session removed
session:output	{ id, data }	Parsed output line (ANSI stripped)
session:terminal	{ id, data }	Raw terminal data with ANSI codes
session:message	{ id, message }	Parsed Claude JSON message
session:running	{ id, prompt }	Prompt execution started
session:interactive	{ id }	Interactive mode started
session:completion	{ id, result, cost }	Prompt completed, includes cost
session:exit	{ id, code }	Session process exited
session:idle	{ id }	Session is idle (prompt detected)
session:working	{ id }	Session is working (activity detected)
session:updated	{ session }	Session state updated
session:error	{ id, error }	Session error occurred
session:autoClear	{ sessionId, tokens, threshold }	Auto-clear triggered

Task Events:

Event	Data	Description
task:created	{ sessionId, task }	Background task started
task:updated	{ sessionId, task }	Task status updated
task:completed	{ sessionId, task }	Task finished successfully
task:failed	{ sessionId, task, error }	Task failed

Respawn Controller Events:

Event	Data	Description
respawn:started	{ sessionId, status }	Respawn controller started
respawn:stopped	{ sessionId }	Respawn controller stopped
respawn:stateChanged	{ sessionId, state, prevState }	State machine transition
respawn:cycleStarted	{ sessionId, cycleNumber }	New update cycle starting
respawn:cycleCompleted	{ sessionId, cycleNumber }	Update cycle finished
respawn:stepSent	{ sessionId, step, input }	Command sent (update/clear/init)
respawn:stepCompleted	{ sessionId, step }	Command completed
respawn:configUpdated	{ sessionId, config }	Configuration changed
respawn:timerStarted	{ sessionId, durationMinutes, endAt, startedAt }	Timed respawn started
respawn:log	{ sessionId, message }	Debug/info log message
respawn:error	{ sessionId, error }	Error occurred

Scheduled Run Events:

Event	Data	Description
scheduled:created	{ run }	New scheduled run created
scheduled:updated	{ run }	Status/timer update
scheduled:log	{ id, log }	Scheduled run log entry
scheduled:completed	{ run }	Scheduled run finished
scheduled:stopped	{ run }	Scheduled run stopped by user

Case Events:

Event	Data	Description
case:created	{ name, path }	New case directory created

Init Event:

Event	Data	Description
init	{ sessions, scheduledRuns, respawnStatus, timestamp }	Full state sent on SSE connection

API Endpoints

Session Management

GET  /api/sessions                    # List all sessions (includes buffer stats)
POST /api/sessions                    # Create session { workingDir, mode?, name? }
GET  /api/sessions/:id                # Get single session details
PUT  /api/sessions/:id/name           # Rename session { name }
DELETE /api/sessions/:id              # Stop and remove a session (kills process + children)
DELETE /api/sessions                  # Kill all sessions at once
GET  /api/sessions/:id/output         # Get session output buffer
GET  /api/sessions/:id/terminal       # Get terminal buffer (raw ANSI)

Session Operations

POST /api/sessions/:id/run            # Run prompt { prompt } (one-shot mode)
POST /api/sessions/:id/interactive    # Start interactive Claude terminal mode
POST /api/sessions/:id/shell          # Start plain shell (bash/zsh, no Claude)
POST /api/sessions/:id/input          # Send input to interactive session { input }
POST /api/sessions/:id/resize         # Resize terminal { cols, rows }
POST /api/sessions/:id/interactive-respawn  # Start interactive + respawn controller

Respawn Controller

GET  /api/sessions/:id/respawn        # Get respawn controller state
POST /api/sessions/:id/respawn/start  # Start respawn controller { config? }
POST /api/sessions/:id/respawn/stop   # Stop respawn controller
POST /api/sessions/:id/respawn/enable # Enable respawn on existing session { config?, durationMinutes? }
PUT  /api/sessions/:id/respawn/config # Update config { idleTimeoutMs, updatePrompt, interStepDelayMs, sendClear, sendInit }
POST /api/sessions/:id/auto-clear     # Set auto-clear { enabled, threshold? }

Scheduled Runs

GET  /api/scheduled                   # List all scheduled runs
POST /api/scheduled                   # Create { prompt, workingDir, durationMinutes }
GET  /api/scheduled/:id               # Get scheduled run details
DELETE /api/scheduled/:id             # Cancel scheduled run

Cases & Quick Start

GET  /api/cases                       # List case directories
POST /api/cases                       # Create case { name, description }
GET  /api/cases/:name                 # Get case details
POST /api/quick-start                 # Quick start { caseName? } - creates case + interactive session
POST /api/run                         # Quick run { prompt, workingDir } (no session management)

Quick Start Response:

{
  success: boolean;
  sessionId?: string;    // ID of the created session
  casePath?: string;     // Full path to the case directory
  caseName?: string;     // Name of the case
  error?: string;        // Error message if success is false
}

Events

GET  /api/events                      # SSE stream (real-time events)
GET  /api/status                      # Full state snapshot (sessions + scheduled + respawn)

Testing

Unit Tests

Tests use Vitest and auto-discover *.test.ts files in the test/ directory:

npm run test                              # Run all tests once
npm run test:watch                        # Watch mode
npm run test:coverage                     # With coverage report
npx vitest run test/session.test.ts       # Single file
npx vitest run -t "should create session" # By pattern

E2E Testing with agent-browser

For UI testing, use agent-browser. A full E2E test plan is documented in .claude/skills/e2e-test.md.

# Setup
npx agent-browser install              # Download Chromium (one-time)
npx tsx src/index.ts web &             # Start server

# Basic test flow
npx agent-browser open http://localhost:3000
npx agent-browser snapshot             # Get accessibility tree with element refs
npx agent-browser click @e5            # Click by element ref
npx agent-browser find text "Run Claude" click  # Or use semantic locators
npx agent-browser eval "app.sessions.get(app.activeSessionId)"  # Run JS
npx agent-browser screenshot /tmp/test.png
npx agent-browser close

Key test areas: Initial load, font controls (A-/A+), tab count stepper, session creation with screen wrapping, session options modal, monitor panel.

Frontend

The web UI (src/web/public/) uses vanilla JavaScript with:

• xterm.js: Terminal emulator with WebGL renderer for 60fps performance
• xterm-addon-fit: Auto-resize terminal to container
• Server-Sent Events: Real-time updates from /api/events
• No build step: Static files served directly by Fastify

Notes

• State persists to ~/.claudeman/state.json and ~/.claudeman/screens.json
• Cases are created in ~/claudeman-cases/ by default
• Sessions are wrapped in GNU screen for persistence across server restarts