worktree-agents

name	worktree-agents
description	Create worktrees and launch Claude Code agents. USE THIS SKILL when user says "create worktree", "spin up worktree", "new worktree", "worktree for X", or wants parallel development branches. Also handles worktree status, cleanup, and agent launching.

Worktree Agent Management

This skill helps manage parallel development using git worktrees with AI coding agents. Each worktree is an isolated copy of the repo on a different branch, allowing multiple Claude Code agents to work simultaneously without conflicts.

When This Skill Activates

Trigger phrases:

• "spin up worktrees for X, Y, Z"
• "create worktrees and launch agents"
• "parallelize work on these features"
• "what's the status of my worktrees?"
• "launch agent in worktree X"
• "clean up merged worktrees"
• "clean up the X worktree"

Intent

The user wants to:

1. Create: Set up isolated worktrees for parallel feature development
2. Launch: Start Claude Code agents in those worktrees
3. Monitor: See what's running and what state each worktree is in
4. Cleanup: Remove worktrees after PRs are merged

CRITICAL: Directory Structure

All worktrees MUST be created in the worktrees/ subdirectory relative to the repo root.

repo-root/
├── worktrees/                          # All worktrees go here
│   ├── feature/auth/                   # Branch: feature/auth
│   ├── feature/payments/               # Branch: feature/payments
│   └── fix/login-bug/                  # Branch: fix/login-bug
├── src/
├── .claude/
└── ...

NEVER create worktrees as sibling directories (e.g., ../repo-feature-auth). This breaks:

• Status tracking
• Cleanup scripts
• Registry path matching

Correct:

git worktree add worktrees/feature/auth -b feature/auth

Wrong:

git worktree add ../repo-feature-auth -b feature/auth  # NO!

Architecture

.claude/skills/worktree-agents/
├── SKILL.md           # This file - instructions for Claude
├── config.json        # User preferences (terminal, shell, ports)
└── scripts/
    ├── launch-agent.sh    # Opens terminal with Claude Code
    ├── status.sh          # Shows worktree overview
    ├── register.sh        # Adds worktree to registry
    ├── unregister.sh      # Removes from registry
    └── cleanup.sh         # Full cleanup workflow

.claude/worktree-registry.json    # Tracks active worktrees (in repo root)

What You (Claude) Do vs What Scripts Do

Task	Who Does It	How
Create git worktree	You	git worktree add worktrees/<branch> -b <branch>
Copy .agents/ directory	You	cp -r .agents worktrees/<branch>/ (for plans, RCAs, etc.)
Install dependencies	You	cd worktrees/<branch> && npm install
Run validation	You	npm run type-check && npm run lint && npm test
Pick next available port	You	Look at registry, find unused port in range
Register worktree	Script	scripts/register.sh <branch> <path> <port> [task]
Launch agent in terminal	Script	scripts/launch-agent.sh <path> [task]
Show status	Script	scripts/status.sh
Full cleanup	Script	scripts/cleanup.sh <branch> [--delete-branch]
Check PR status	You	gh pr list --head <branch> --json number,state
Decide what to clean	You	Check if PR merged, ask user if unsure

IMPORTANT: Copy .agents/ Directory

Why: Uncommitted files (plans, RCA reports, PRPs) only exist in the source worktree. New worktrees start clean from git, so these files won't be there.

Always copy the .agents/ directory to new worktrees so the agent has access to:

• .agents/plans/ - Implementation plans to execute
• .agents/rca-reports/ - Root cause analysis reports
• .agents/PRPs/ - Product requirement plans

# After creating worktree, copy .agents/
cp -r .agents worktrees/<branch>/.agents

Port Allocation

Ports are assigned from the configured range (default: 8124-8128).

To find next available port:

1. Read .claude/worktree-registry.json
2. Get list of used ports: jq '.worktrees[].port' .claude/worktree-registry.json
3. Pick first unused port in range

Port range (from config.json):

• Default: 8124, 8125, 8126, 8127, 8128
• Maximum 5 concurrent worktrees

---

Workflows

1. Create Worktrees with Agents

User says: "Spin up worktrees for feature/auth and feature/payments"

You do:

1. For each branch:
   a. Find next available port (check registry)
   b. Create worktree:
      git worktree add worktrees/<branch> -b <branch>
   c. Copy .agents/ directory (plans, RCAs, PRPs):
      cp -r .agents worktrees/<branch>/.agents
   d. Install dependencies:
      cd worktrees/<branch> && npm install
   e. Run validation (optional but recommended):
      npm run type-check && npm run lint && npm test
   f. Register:
      scripts/register.sh <branch> worktrees/<branch> <port> "[task]"
   g. Launch agent:
      scripts/launch-agent.sh worktrees/<branch> "[task]"

2. Report summary to user

Example commands:

# Create worktrees
git worktree add worktrees/feature/auth -b feature/auth
git worktree add worktrees/feature/payments -b feature/payments

# Copy .agents/ directory (uncommitted plans, RCAs, etc.)
cp -r .agents worktrees/feature/auth/.agents
cp -r .agents worktrees/feature/payments/.agents

# Install deps
cd worktrees/feature/auth && npm install
cd worktrees/feature/payments && npm install

# Register (finds script in .claude/skills/worktree-agents/scripts/)
.claude/skills/worktree-agents/scripts/register.sh feature/auth worktrees/feature/auth 8124 "Implement OAuth"
.claude/skills/worktree-agents/scripts/register.sh feature/payments worktrees/feature/payments 8125 "Add Stripe"

# Launch agents
.claude/skills/worktree-agents/scripts/launch-agent.sh worktrees/feature/auth "Implement OAuth"
.claude/skills/worktree-agents/scripts/launch-agent.sh worktrees/feature/payments "Add Stripe"

2. Check Status

User says: "What's the status?" or "Show my worktrees"

You do:

.claude/skills/worktree-agents/scripts/status.sh

This shows:

• All registered worktrees
• Port assignments
• PR status (fetched from GitHub)
• When agent was launched
• Whether worktree directory exists

3. Launch Agent in Existing Worktree

User says: "Launch an agent in the auth worktree"

You do:

# Find the worktree path
git worktree list | grep auth

# Launch
.claude/skills/worktree-agents/scripts/launch-agent.sh worktrees/feature/auth "Continue auth work"

4. Cleanup Worktrees

User says: "Clean up the auth worktree" or "Clean up merged worktrees"

For single worktree:

# Check if PR is merged first
gh pr list --head feature/auth --state merged

# If merged (or user confirms), clean up
.claude/skills/worktree-agents/scripts/cleanup.sh feature/auth

# To also delete the git branch:
.claude/skills/worktree-agents/scripts/cleanup.sh feature/auth --delete-branch

For "merged" worktrees:

# Get list of registered worktrees
cat .claude/worktree-registry.json

# For each, check if PR is merged
gh pr list --head <branch> --state merged --json number

# Clean up those with merged PRs
.claude/skills/worktree-agents/scripts/cleanup.sh <branch> --delete-branch

Cleanup script handles:

• Killing processes on the port
• Removing worktree directory
• Pruning git references
• Unregistering from registry
• Optionally deleting local+remote branches

---

Registry Schema

Location: .claude/worktree-registry.json

{
  "worktrees": [
    {
      "branch": "feature/auth",
      "path": "worktrees/feature/auth",
      "port": 8124,
      "createdAt": "2025-12-02T10:00:00Z",
      "agentLaunchedAt": "2025-12-02T10:05:00Z",
      "task": "Implement OAuth login",
      "prNumber": null
    }
  ]
}

You update agentLaunchedAt after launching by re-running register.sh (it updates existing entries).

You update prNumber when you discover a PR exists:

# Check for PR
PR_NUM=$(gh pr list --head feature/auth --json number --jq '.[0].number')

# Update registry with jq
jq ".worktrees |= map(if .branch == \"feature/auth\" then .prNumber = $PR_NUM else . end)" \
  .claude/worktree-registry.json > tmp.json && mv tmp.json .claude/worktree-registry.json

---

Configuration

Location: .claude/skills/worktree-agents/config.json

{
  "terminal": "ghostty",      // ghostty, iterm2, or tmux
  "shell": "fish",            // fish, bash, or zsh
  "claudeCommand": "cc",      // command to launch Claude Code
  "portRange": {
    "start": 8124,
    "end": 8128
  }
}

Terminal options:

• ghostty - Opens new Ghostty window (macOS)
• iterm2 - Opens new iTerm2 window (macOS)
• tmux - Creates new tmux session (cross-platform)

---

Script Reference

launch-agent.sh

./scripts/launch-agent.sh <worktree-path> [task-description]

# Examples:
./scripts/launch-agent.sh worktrees/feature/auth
./scripts/launch-agent.sh worktrees/feature/auth "Implement OAuth login"

register.sh

./scripts/register.sh <branch> <path> <port> [task]

# Examples:
./scripts/register.sh feature/auth worktrees/feature/auth 8124
./scripts/register.sh feature/auth worktrees/feature/auth 8124 "Implement OAuth"

unregister.sh

./scripts/unregister.sh <branch>

# Example:
./scripts/unregister.sh feature/auth

cleanup.sh

./scripts/cleanup.sh <branch> [--delete-branch]

# Examples:
./scripts/cleanup.sh feature/auth                    # Keep git branch
./scripts/cleanup.sh feature/auth --delete-branch   # Delete branch too

status.sh

./scripts/status.sh

---

Safety Guidelines

1. Before cleaning up, check PR status:

   • If PR is merged: safe to clean up everything
   • If PR is open: warn user, confirm before proceeding
   • If no PR: warn user there may be unsubmitted work

2. Before deleting branches, confirm with user if:

   • PR is not merged
   • No PR exists
   • Worktree has uncommitted changes

3. Port conflicts: If a port is in use by a non-worktree process, pick a different port

4. Max 5 worktrees: The default port range only supports 5 concurrent worktrees

---

Common Issues

"Port already in use"

# Find what's using it
lsof -i :8124

# Kill if it's a stale process
kill -9 <PID>

"Worktree already exists"

# Check existing worktrees
git worktree list

# Remove if stale
git worktree remove worktrees/<branch> --force
git worktree prune

"Branch already exists"

The git worktree command handles this:

# This tries -b (new branch) first, falls back to existing
git worktree add worktrees/<branch> -b <branch> 2>/dev/null || git worktree add worktrees/<branch> <branch>

Registry out of sync

# Compare registry to actual worktrees
cat .claude/worktree-registry.json
git worktree list

# Manually clean up stale entries
.claude/skills/worktree-agents/scripts/unregister.sh <stale-branch>

---

Example Session

User: "Spin up 2 worktrees for feature/dark-mode and fix/login-bug, then launch agents"

You:

1. Check registry for used ports → none used, start with 8124
2. Create worktrees:

   git worktree add worktrees/feature/dark-mode -b feature/dark-mode
   git worktree add worktrees/fix/login-bug -b fix/login-bug
   

3. Copy .agents/ directory (so agents have access to plans, RCAs):

   cp -r .agents worktrees/feature/dark-mode/.agents
   cp -r .agents worktrees/fix/login-bug/.agents
   

4. Install deps:

   cd worktrees/feature/dark-mode && npm install
   cd worktrees/fix/login-bug && npm install
   

5. Register:

   .claude/skills/worktree-agents/scripts/register.sh feature/dark-mode worktrees/feature/dark-mode 8124 "Implement dark mode toggle"
   .claude/skills/worktree-agents/scripts/register.sh fix/login-bug worktrees/fix/login-bug 8125 "Fix login redirect bug"
   

6. Launch agents:

   .claude/skills/worktree-agents/scripts/launch-agent.sh worktrees/feature/dark-mode "Implement dark mode toggle"
   .claude/skills/worktree-agents/scripts/launch-agent.sh worktrees/fix/login-bug "Fix login redirect bug"
   

7. Report:

   Created 2 worktrees with agents:
   
   | Branch | Port | Task |
   |--------|------|------|
   | feature/dark-mode | 8124 | Implement dark mode toggle |
   | fix/login-bug | 8125 | Fix login redirect bug |
   
   Both agents are now running in separate Ghostty windows.
   .agents/ directory copied to each worktree.