Codeman/CLAUDE.md

CLAUDE.md

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

⚠️ CRITICAL: Screen Session Safety

You may be running inside a Claudeman-managed screen session. Before killing ANY screen or Claude process:

1. Check environment: echo $CLAUDEMAN_SCREEN - if it returns 1, you're in a managed session
2. NEVER run screen -X quit, pkill screen, or pkill claude without first confirming you're not killing yourself
3. Safe debugging: Use screen -ls to LIST sessions, but don't kill them blindly
4. If you need to kill screens: Use the web UI or ./scripts/screen-manager.sh instead of direct commands

Why this matters: Killing your own screen terminates your session mid-work, losing context and potentially corrupting state.

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 (ES2022/NodeNext, strict mode), Node.js, Fastify, Server-Sent Events, node-pty

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

First-Time Setup

npm install

Commands

CRITICAL: npm run dev runs CLI help, NOT the web server. Use npx tsx src/index.ts web for development.

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
npm run web                        # After npm run build (shorthand)
node dist/index.js web             # After npm run build
claudeman web                      # After npm link

# Start TUI (terminal user interface):
npx tsx src/index.ts tui           # Dev mode - full-screen TUI
claudeman tui                      # After npm link

# Testing (vitest)
# Note: globals: true configured - no imports needed for describe/it/expect
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

# Test port allocation (integration tests spawn servers):
# 3099: quick-start.test.ts
# 3102: session.test.ts
# 3105: scheduled-runs.test.ts
# 3107: sse-events.test.ts
# 3110: edge-cases.test.ts
# 3115: integration-flows.test.ts
# 3120: session-cleanup.test.ts
# Unit tests (no port needed): respawn-controller, inner-loop-tracker, pty-interactive, task-queue, task, ralph-loop
# Next available: 3122+

# Tests mock PTY - no real Claude CLI spawned
# Test timeout: 30s (configured in vitest.config.ts)

# TypeScript checking
npx tsc --noEmit                          # Type check without building
# Note: No ESLint/Prettier configured - rely on TypeScript strict mode

# Debugging
screen -ls                                # List GNU screen sessions
screen -r <name>                          # Attach to screen session (Ctrl+A D to detach)
curl localhost:3000/api/sessions          # Check active sessions
curl localhost:3000/api/status | jq .     # Full app state including respawn
cat ~/.claudeman/state.json | jq .        # View main state
cat ~/.claudeman/state-inner.json | jq .  # View inner loop state

# Kill stuck screen sessions
screen -X -S <name> quit                  # Graceful quit
pkill -f "SCREEN.*claudeman"              # Force kill all claudeman screens

Architecture

Key Files

File	Purpose
src/session.ts	Core PTY wrapper for Claude CLI. Modes: runPrompt(), startInteractive(), startShell()
src/respawn-controller.ts	State machine for autonomous session cycling
src/screen-manager.ts	GNU screen persistence, ghost discovery, 4-strategy kill
src/inner-loop-tracker.ts	Detects <promise>PHRASE</promise>, todos, loop status in output
src/task-tracker.ts	Parses background task output (agent IDs, status) from Claude CLI
src/session-manager.ts	Manages session lifecycle, task assignment, and cleanup
src/state-store.ts	JSON persistence to ~/.claudeman/ with debounced writes
src/web/server.ts	Fastify REST API + SSE at /api/events
src/web/public/app.js	Frontend: SSE handling, xterm.js, tab management
src/tui/App.tsx	TUI main component: tabs, terminal viewport, status bar (Ink/React)
src/tui/hooks/useSessionManager.ts	TUI session state, screen polling, input handling
src/types.ts	All TypeScript interfaces

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

Respawn State Machine

┌─────────────────────────────────────────────────────────────────────────────────────────────────┐
│                                                                                                 │
▼                                                                                                 │
WATCHING → SENDING_UPDATE → WAITING_UPDATE → SENDING_CLEAR → WAITING_CLEAR                       │
                                                    │                                             │
                                                    ▼                                             │
                              SENDING_INIT → WAITING_INIT → MONITORING_INIT ──┬──────────────────┘
                                                                              │
                                                                              ▼ (if no work triggered)
                                                            SENDING_KICKSTART → WAITING_KICKSTART

States: watching, sending_update, waiting_update, sending_clear, waiting_clear, sending_init, waiting_init, monitoring_init, sending_kickstart, waiting_kickstart, stopped

Steps can be skipped via config (sendClear: false, sendInit: false). Optional kickstartPrompt triggers if /init doesn't start work. Idle detection triggers state transitions.

Session Modes

Sessions have a mode property (SessionMode type):

• 'claude': Runs Claude CLI for AI interactions (default)
• 'shell': Runs a plain bash shell for debugging/testing

Screen-Aware Sessions

All Claude sessions spawned by Claudeman receive environment variables indicating they're running in a managed screen:

Variable	Value	Purpose
CLAUDEMAN_SCREEN	1	Indicates session is managed by Claudeman
CLAUDEMAN_SESSION_ID	<uuid>	Unique session identifier
CLAUDEMAN_SCREEN_NAME	claudeman-<name>	GNU screen session name

This prevents Claude from accidentally killing its own screen session. The default CLAUDE.md template includes guidance about this.

Implementation: Set in screen-manager.ts:createScreen() for screen-based sessions and session.ts:startInteractive()/startShell() for PTY-only sessions.

Code Patterns

Pre-compiled Regex Patterns

For performance, regex patterns that are used frequently should be compiled once at module level:

// Good - compile once
const ANSI_ESCAPE_PATTERN = /\x1b\[[0-9;]*m/g;
const TOKEN_PATTERN = /(\d+(?:\.\d+)?)\s*([kKmM])?\s*tokens/;

// Bad - recompiles on each call
function parse(line: string) {
  return line.replace(/\x1b\[[0-9;]*m/g, '');
}

Claude Message Parsing

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

const cleanLine = line.replace(ANSI_ESCAPE_PATTERN, '');
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 (JSON output for token tracking)
pty.spawn('claude', ['-p', '--dangerously-skip-permissions', '--output-format', 'stream-json', prompt], { ... })

// Interactive mode (tokens parsed from status line)
pty.spawn('claude', ['--dangerously-skip-permissions'], { ... })

// Shell mode (debugging/testing - no Claude CLI)
pty.spawn('bash', [], { ... })

Sending Input to Sessions

There are two methods for sending input to Claude sessions:

1. session.write(data) - Direct PTY write

Used by the /api/sessions/:id/input API endpoint. Writes directly to PTY.

session.write('hello world');  // Text only, no Enter
session.write('\r');           // Enter key separately

2. session.writeViaScreen(data) - Via GNU screen (RECOMMENDED for programmatic input)

Used by RespawnController, auto-compact, auto-clear. More reliable for Ink/Claude CLI.

// Append \r to include Enter - the method handles splitting automatically
session.writeViaScreen('your command here\r');
session.writeViaScreen('/clear\r');
session.writeViaScreen('/init\r');

How writeViaScreen works internally (in screen-manager.ts:sendInput):

1. Splits input into text and \r (carriage return)
2. Sends text first: screen -S name -p 0 -X stuff "text"
3. Sends Enter separately: screen -S name -p 0 -X stuff "$(printf '\015')"

Why separate commands? Claude CLI uses Ink (React for terminals) which requires text and Enter as separate screen -X stuff commands. Combining them doesn't work. This is a critical implementation detail when debugging input issues.

API Usage

# Send text (won't submit until Enter is sent)
curl -X POST localhost:3000/api/sessions/:id/input \
  -H "Content-Type: application/json" \
  -d '{"input": "your prompt here"}'

# Send Enter separately to submit
curl -X POST localhost:3000/api/sessions/:id/input \
  -H "Content-Type: application/json" \
  -d '{"input": "\r"}'

Note: The API uses session.write() which goes to PTY directly. For reliability with Ink, consider using the respawn controller pattern or adding an API endpoint that uses writeViaScreen().

Idle Detection

RespawnController: Primary ↵ send indicator, fallback prompt chars (❯, ⏵) + 10s timeout. Working patterns: Thinking, Writing, Running. Session: emits idle/working events on prompt detection + 2s activity timeout.

Token Tracking

• One-shot mode: Uses --output-format stream-json for detailed token usage from JSON
• Interactive mode: Parses tokens from Claude's status line (e.g., "123.4k tokens"), estimates 60/40 input/output split

Auto-Compact & Auto-Clear

Feature	Default Threshold	Action
Auto-Compact	110k tokens	/compact with optional prompt
Auto-Clear	140k tokens	/clear to reset context

Both wait for idle. Configure via session.setAutoCompact() / session.setAutoClear().

Inner Loop Tracking

Detects Ralph loops and todos inside Claude sessions. Disabled by default but auto-enables when any of these patterns are detected in terminal output:

• /ralph-loop:ralph-loop command
• <promise>PHRASE</promise> completion phrases
• TodoWrite tool usage
• Iteration patterns (Iteration 5/50, [5/50])
• Todo checkboxes (- [ ]/- [x]) or indicator icons (☐/◐/✓)
• "All tasks complete" messages
• Individual task completion signals (Task 8 is done)

See inner-loop-tracker.ts:shouldAutoEnable() for detection logic.

Completion Detection: Uses multi-strategy detection:

• 1st occurrence of <promise>PHRASE</promise>: Stores as expected phrase (likely in prompt)
• 2nd occurrence: Emits completionDetected event (actual completion)
• Bare phrase detection: Also detects phrase without tags once expected phrase is known
• All complete detection: When "All X files/tasks created/completed" detected, marks all todos complete and emits completion
• If loop is already active (via /ralph-loop:ralph-loop): Emits immediately on first occurrence

Session Lifecycle: Each session has its own independent tracker:

• New session → Fresh tracker (no carryover)
• Close tab → Tracker state cleared, UI panel hides
• Switch tabs → Panel shows tracker for active session
• tracker.reset() → Clears todos/state, keeps enabled status
• tracker.fullReset() → Complete reset to initial state

API:

• GET /api/sessions/:id/inner-state - Get loop state and todos
• POST /api/sessions/:id/inner-config - Configure tracker:
  • { enabled: boolean } - Enable/disable
  • { reset: true } - Soft reset (keep enabled)
  • { reset: "full" } - Full reset

UI: Collapsible panel below tabs, shows progress ring and todo list.

Terminal Display Fix

Tab switch/new session fix: clear xterm → write buffer → resize PTY → Ctrl+L redraw. Uses pendingCtrlL Set, triggered on session:idle/session:working events.

SSE Events

All events broadcast to /api/events with format: { type: string, sessionId?: string, data: any }.

Event prefixes: session:, task:, respawn:, scheduled:, case:, screen:, init.

Key events for frontend handling (see app.js:handleSSEEvent()):

• session:idle, session:working - Status indicator updates
• session:terminal, session:clearTerminal - Terminal content
• session:completion, session:autoClear, session:autoCompact - Lifecycle events
• session:innerLoopUpdate, session:innerTodoUpdate, session:innerCompletionDetected - Ralph tracking

Frontend (app.js)

Vanilla JS + xterm.js. Key functions:

• handleSSEEvent() - Dispatches events to appropriate handlers
• switchToSession() - Tab management and terminal focus
• createSessionTab() - Tab creation and xterm setup

60fps Rendering Pipeline:

• Server batches terminal data every 16ms before broadcasting via SSE
• Client uses requestAnimationFrame to batch xterm.js writes
• Prevents UI jank during high-throughput Claude output

State Store

Writes debounced to ~/.claudeman/state.json. Batches rapid changes.

Timing Constants

Constant	Value	Location
State save debounce	500ms	state-store.ts
State update debounce	500ms	server.ts
Line buffer flush	100ms	session.ts
Terminal batch interval	16ms	server.ts (60fps)
Output batch interval	50ms	server.ts
Task update batch interval	100ms	server.ts
Inner loop event debounce	50ms	inner-loop-tracker.ts
Session tabs render debounce	100ms	app.js
Inner panel render debounce	50ms	app.js
Task panel render debounce	100ms	app.js
Input batch interval	16ms	app.js (60fps)
Idle activity timeout	2s	session.ts
Respawn idle timeout	5s default	RespawnConfig.idleTimeoutMs

TypeScript Config

Module resolution: NodeNext. Target: ES2022. Strict mode enabled. See tsconfig.json for full settings.

Adding New Features

• API endpoint: Add types in types.ts, route in server.ts:buildServer(), use createErrorResponse() for errors
• SSE event: Emit via broadcast() in server.ts, handle in app.js:handleSSEEvent() switch
• Session event: Add to SessionEvents interface in session.ts, emit via this.emit(), subscribe in server.ts, handle in frontend
• New test file: Create test/<name>.test.ts, pick unique port (next available: 3122+), add to port allocation comment above

API Error Codes

Use createErrorResponse(code, details?) from types.ts:

Code	Use Case
NOT_FOUND	Session/resource doesn't exist
INVALID_INPUT	Bad request parameters
SESSION_BUSY	Session is currently processing
OPERATION_FAILED	Action couldn't complete
ALREADY_EXISTS	Duplicate resource
INTERNAL_ERROR	Unexpected server error

Session Lifecycle & Cleanup

• Limit: Web server: MAX_CONCURRENT_SESSIONS = 50 (server.ts:56), UI tab limit: 20, CLI default: 5 (types.ts:DEFAULT_CONFIG)
• Kill (killScreen()): child PIDs → process group → screen quit → SIGKILL
• Ghost discovery: reconcileScreens() finds orphaned screens on startup
• Cleanup (cleanupSession()): stops respawn, clears buffers/timers, kills screen

Buffer Limits

Long-running sessions are supported with automatic trimming:

Buffer	Max Size	Trim To
Terminal	5MB	4MB
Text output	2MB	1.5MB
Messages	1000	800
Line buffer	64KB	(flushed every 100ms)
Respawn buffer	1MB	512KB

E2E Testing

Uses agent-browser for web UI automation. Full test plan: .claude/skills/e2e-test.md

npx agent-browser open http://localhost:3000
npx agent-browser wait --load networkidle
npx agent-browser snapshot
npx agent-browser find text "Run Claude" click
npx agent-browser close

API Routes Quick Reference

Method	Endpoint	Description
GET	/api/events	SSE stream for real-time updates
GET	/api/status	Full application state
GET/POST/DELETE	/api/sessions	List/create/kill-all sessions
GET/DELETE	/api/sessions/:id	Get/delete specific session
POST	/api/sessions/:id/input	Send input to session PTY
POST	/api/sessions/:id/resize	Resize terminal (cols, rows)
POST	/api/sessions/:id/interactive	Start interactive mode
POST	/api/sessions/:id/respawn/start	Start respawn controller
POST	/api/sessions/:id/respawn/stop	Stop respawn controller
POST	/api/sessions/:id/respawn/enable	Enable respawn with config + optional timer
PUT	/api/sessions/:id/respawn/config	Update config on running respawn
POST	/api/sessions/:id/inner-config	Configure Ralph Wiggum loop settings
GET	/api/sessions/:id/inner-state	Get Ralph loop state + todos
POST	/api/sessions/:id/auto-compact	Configure auto-compact threshold
POST	/api/sessions/:id/auto-clear	Configure auto-clear threshold
POST	/api/quick-start	Create case + start interactive session
GET	/api/cases	List available cases
POST	/api/cases	Create new case
GET	/api/screens	List screen sessions with stats

Keyboard Shortcuts

Shortcut	Action
Ctrl+Enter	Run Claude (create case + interactive session)
Ctrl+W	Close current session
Ctrl+Tab	Switch to next session
Ctrl+K	Kill all sessions
Ctrl+L	Clear terminal
Ctrl++/-	Increase/decrease font size
Ctrl+?	Show keyboard shortcuts help
Escape	Close panels and modals

State Files

File	Purpose
~/.claudeman/state.json	Sessions, tasks, config
~/.claudeman/state-inner.json	Inner loop/todo state (separate to reduce writes)
~/.claudeman/screens.json	Screen session metadata

Cases created in ~/claudeman-cases/ by default.

Screen Session Manager (CLI Tool)

Interactive bash tool for managing claudeman screen sessions directly from the terminal.

./scripts/screen-manager.sh          # Interactive mode
./scripts/screen-manager.sh list     # List all sessions
./scripts/screen-manager.sh attach 1 # Attach to session #1
./scripts/screen-manager.sh kill 2,3 # Kill sessions 2 and 3
./scripts/screen-manager.sh kill-all # Kill all sessions
./scripts/screen-manager.sh info 1   # Show session #1 details

Interactive Controls:

Key	Action
↑/↓ or j/k	Navigate sessions
Enter	Attach to selected session
d	Delete selected session
D	Delete ALL sessions
i	Show session info
q/Esc	Quit

Features:

• Reads from ~/.claudeman/screens.json (claudeman's authoritative source)
• Shows session name, running time, alive/dead status, mode
• Flicker-free navigation (only updates changed rows)
• Requires jq and screen to be installed

Documentation

Extended documentation is available in the docs/ directory:

Document	Description
docs/ralph-wiggum-guide.md	Complete Ralph Wiggum loop guide: official plugin reference, best practices, prompt templates, troubleshooting
docs/claude-code-hooks-reference.md	Official Claude Code hooks documentation: all events, configuration, examples

Quick Reference: Ralph Wiggum Loops

Core Pattern: <promise>PHRASE</promise> - The completion signal that tells the loop to stop.

Skill Commands:

/ralph-loop:ralph-loop    # Start Ralph Loop in current session
/ralph-loop:cancel-ralph  # Cancel active Ralph Loop
/ralph-loop:help          # Show help and usage

Claudeman Implementation: The InnerLoopTracker class (src/inner-loop-tracker.ts) detects Ralph patterns in Claude output and tracks loop state, todos, and completion phrases. It auto-enables when Ralph-related patterns are detected.

See docs/ralph-wiggum-guide.md for full documentation on best practices, prompt templates, and troubleshooting.

Optimization Status

Most critical optimizations have been implemented. See .claude/optimization-todos.md for details.

Completed:

Area	Implementation
Buffer management	BufferAccumulator with auto-trimming
Pre-compiled regex	Module-level patterns with lastIndex resets
Event listener cleanup	cleanupTrackerListeners() in session.ts
Event debouncing	50ms debounce in inner-loop-tracker.ts
State update debouncing	500ms batching in server.ts
Regex pre-checks	String.includes() before pattern.test()
Frontend render debouncing	50-100ms for panels, tabs
CSS containment	contain property on terminal, panels, modals
Input batching	60fps keystroke coalescing
Incremental DOM updates	Session tabs and Ralph todos

Remaining:

Priority	Area	Files
Low	Task lookup optimization	task-tracker.ts
Low	Buffer pagination API	server.ts

Run cat .claude/optimization-todos.md for the full list with file:line references.