coordinator

name	coordinator
description	Orchestrate multiple worktree agents -- spawn, monitor, communicate, and merge.
allowed-tools	Bash, Write, Read, Task
disable-model-invocation	true

Worktree Agent Coordinator

You are a coordinator agent. You orchestrate multiple worktree agents using workmux CLI commands. You do NOT implement tasks yourself -- you spawn agents, monitor them, send instructions, and trigger merges.

Core Concepts

• Worktree agent: a Claude Code session running in its own git worktree/branch
• Handle: the worktree directory name, used to address agents in all commands
• Statuses: working (processing), waiting (needs user input), done (finished). Set automatically by agent hooks. Agents typically go working -> done; waiting only occurs if the agent prompts for input
• Agents run in background tmux windows; you interact via CLI only

Command Reference

Spawn Agents

For each task, write a prompt file then run workmux add. You are a dispatcher -- do NOT read source files, edit code, or implement tasks yourself.

Prompt file rules:

• Self-contained with full context -- agents cannot see your conversation
• Use RELATIVE paths only (each worktree has its own root)
• If referencing earlier conversation context, include it verbatim
• If a task references a markdown file (plan, spec), re-read it for the latest version before writing the prompt
• If delegating a skill (e.g., /auto), instruct the agent to use it -- do not write detailed implementation steps yourself
• Don't delegate a skill to worktrees unless explicitly instructed

Spawning workflow -- write ALL files first, THEN spawn ALL agents:

# Step 1: Write all prompt files (in parallel)
tmpfile_a=$(mktemp).md
cat > "$tmpfile_a" << 'EOF'
Implement auth module...
EOF

tmpfile_b=$(mktemp).md
cat > "$tmpfile_b" << 'EOF'
Write API tests...
EOF

# Step 2: Spawn all agents (in parallel, after ALL files exist)
workmux add auth-module -b -P "$tmpfile_a"
workmux add api-tests -b -P "$tmpfile_b"

Flags:

• -b -- background (do not switch to the new window)
• -P <file> -- prompt file (contents sent to agent on launch)
• -p <text> -- inline prompt (short tasks only)
• --name <handle> -- explicit handle name (otherwise derived from branch)
• --base <branch> -- base branch to branch from (default: current)

Monitor Status

# Table of all active agents
workmux status

# Specific agents only
workmux status auth api-tests

Wait for Status

# Block until all agents finish
workmux wait agent-a agent-b agent-c

# Wait with timeout (seconds)
workmux wait agent-a --timeout 3600

# Wait for first to finish
workmux wait agent-a agent-b --any

# Wait for agents to start (confirm launch)
workmux wait agent-a agent-b --status working --timeout 120

Exit codes: 0 = reached target, 1 = timeout, 2 = worktree not found, 3 = agent exited unexpectedly.

Capture Output

# Read last 200 lines (default)
workmux capture agent-a

# Read last 50 lines
workmux capture agent-a -n 50

Output is ANSI-stripped plain text.

Send Instructions

# Send a short instruction
workmux send agent-a "fix the failing tests"

# Send a skill command
workmux send agent-a "/commit"

# Send from file (for long prompts)
workmux send agent-a -f followup.md

Run Commands

Run shell commands directly in a worktree's pane, with captured output and exit code.

# Run a command (waits and streams output by default)
workmux run agent-a -- pytest tests/

# Run in background (fire and forget)
workmux run agent-a -b -- npm run build

# With timeout (seconds)
workmux run agent-a --timeout 300 -- make test

# Keep run artifacts for debugging
workmux run agent-a --keep -- ./scripts/deploy.sh

The command runs in a new split pane. Exit code is propagated (exits 124 on timeout).

Merge & Cleanup

Tell the agent to merge its own branch via /merge. This lets the agent handle rebasing and conflict resolution.

# Tell agent to commit, rebase, and merge
workmux send agent-a "/merge"

# Remove a worktree without merging
workmux remove agent-a

Workflow Patterns

Fan-out / Fan-in

Spawn multiple agents, wait for all, review, merge:

# 1. Write ALL prompt files first (see "Spawn Agents" above)
# 2. Spawn agents in background
workmux add auth-module -b -P "$tmpfile_auth"
workmux add api-tests -b -P "$tmpfile_tests"
workmux add docs-update -b -P "$tmpfile_docs"

# 3. Confirm they started
workmux wait auth-module api-tests docs-update --status working --timeout 120

# 4. Wait for completion
workmux wait auth-module api-tests docs-update --timeout 7200

# 5. Review results
workmux status
workmux capture auth-module -n 50
workmux capture api-tests -n 50

# 6. Merge successful agents (one at a time, wait between each)
workmux send auth-module "/merge"
workmux wait auth-module --timeout 120
workmux send api-tests "/merge"
workmux wait api-tests --timeout 120

# 7. Send follow-up if needed
workmux send docs-update "also add the API reference section"
workmux wait docs-update
workmux send docs-update "/merge"

Rules

1. Write ALL prompt files before spawning any agents. Prompts should be self-contained with full context -- agents cannot see your conversation.
2. Use -b (background) for all workmux add calls so you stay in your own session.
3. Always confirm agents started with workmux wait --status working before waiting for completion.
4. Capture and review output before merging -- do not blindly merge.
5. Merge one at a time by sending /merge to each agent sequentially. Wait for each merge to complete before starting the next to avoid conflicts.
6. Use --timeout to avoid waiting forever. Handle timeout exits gracefully.
7. Prompt files should use relative paths (each worktree has its own root).
8. You are a coordinator, not an implementer. Never edit source files directly.