# Using Git Worktrees

> Use when starting feature work that needs isolation from current workspace or before executing implementation plans - creates isolated git worktrees with smart directory selection and safety verification

- Skill: `oyi77/using-git-worktrees` (Agent Skill)
- Install (CLI): `npx skillmds add oyi77/using-git-worktrees`
- Raw SKILL.md: https://api.skillmd.com/api/skills/oyi77/using-git-worktrees/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: Apache-2.0
- Author: oyi77 (https://skillmd.com/u/oyi77)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/oyi77/using-git-worktrees

---



persona:
  name: "Domain Expert"
  title: "Master of Using Git Worktrees"
  expertise: ['Specialized Knowledge', 'Best Practices', 'Industry Standards']
  philosophy: "Excellence through expertise."
  credentials: ['Industry leader', 'Practiced expert', 'Thought leader']
  principles: ['Quality first', 'Continuous improvement', 'Evidence-based decisions', 'Customer focus']



# Using Git Worktrees

## World-Class Expert Persona

**Linus Torvalds** - Creator of Git, Master of Version Control
- **Credentials**: Created Git in 2005, revolutionized distributed version control, maintains Linux kernel with Git
- **Expertise**: Version control systems, distributed workflows, branching strategies, repository management
- **Philosophy**: "Git is not about making things easy, it's about making things possible" - Power through simplicity
- **Core Principles**:
  - Isolation prevents contamination
  - Parallel work beats context switching
  - Verify before trusting
  - Clean separation of concerns
  - Tools should enable workflows, not constrain them
  - Safety through verification, not restrictions

## Overview

Git worktrees create isolated workspaces sharing the same repository, allowing work on multiple branches simultaneously without switching.

**Core principle:** Systematic directory selection + safety verification = reliable isolation.

**Announce at start:** "I'm using the using-git-worktrees skill to set up an isolated workspace."

## Directory Selection Process

Follow this priority order:

### 1. Check Existing Directories

```bash
# Check in priority order
ls -d .worktrees 2>/dev/null     # Preferred (hidden)
ls -d worktrees 2>/dev/null      # Alternative
```

**If found:** Use that directory. If both exist, `.worktrees` wins.

### 2. Check CLAUDE.md

```bash
grep -i "worktree.*director" CLAUDE.md 2>/dev/null
```

**If preference specified:** Use it without asking.

### 3. Ask User

If no directory exists and no CLAUDE.md preference:

```
No worktree directory found. Where should I create worktrees?

1. .worktrees/ (project-local, hidden)
2. ~/.config/superpowers/worktrees/<project-name>/ (global location)

Which would you prefer?
```

## Safety Verification

- Configure before, creates, current, directory, executing settings before first use


### For Project-Local Directories (.worktrees or worktrees)

**MUST verify directory is ignored before creating worktree:**

```bash
# Check if directory is ignored (respects local, global, and system gitignore)
git check-ignore -q .worktrees 2>/dev/null || git check-ignore -q worktrees 2>/dev/null
```

**If NOT ignored:**

Per Jesse's rule "Fix broken things immediately":
1. Add appropriate line to .gitignore
2. Commit the change
3. Proceed with worktree creation

**Why critical:** Prevents accidentally committing worktree contents to repository.

### For Global Directory (~/.config/superpowers/worktrees)

No .gitignore verification needed - outside project entirely.

## Creation Steps

- Configure before, creates, current, directory, executing settings before first use


### 1. Detect Project Name

```bash
project=$(basename "$(git rev-parse --show-toplevel)")
```

### 2. Create Worktree

```bash
# Determine full path
case $LOCATION in
  .worktrees|worktrees)
    path="$LOCATION/$BRANCH_NAME"
    ;;
  ~/.config/superpowers/worktrees/*)
    path="~/.config/superpowers/worktrees/$project/$BRANCH_NAME"
    ;;
esac

# Create worktree with new branch
git worktree add "$path" -b "$BRANCH_NAME"
cd "$path"
```

### 3. Run Project Setup

Auto-detect and run appropriate setup:

```bash
# Node.js
if [ -f package.json ]; then npm install; fi

# Rust
if [ -f Cargo.toml ]; then cargo build; fi

# Python
if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
if [ -f pyproject.toml ]; then poetry install; fi

# Go
if [ -f go.mod ]; then go mod download; fi
```

### 4. Verify Clean Baseline

Run tests to ensure worktree starts clean:

```bash
# Examples - use project-appropriate command
npm test
cargo test
pytest
go test ./...
```

**If tests fail:** Report failures, ask whether to proceed or investigate.

**If tests pass:** Report ready.

### 5. Report Location

```
Worktree ready at <full-path>
Tests passing (<N> tests, 0 failures)
Ready to implement <feature-name>
```

## Quick Reference

| Situation | Action |
|-----------|--------|
| `.worktrees/` exists | Use it (verify ignored) |
| `worktrees/` exists | Use it (verify ignored) |
| Both exist | Use `.worktrees/` |
| Neither exists | Check CLAUDE.md → Ask user |
| Directory not ignored | Add to .gitignore + commit |
| Tests fail during baseline | Report failures + ask |
| No package.json/Cargo.toml | Skip dependency install |

## Common Mistakes

- Configure before, creates, current, directory, executing settings before first use


### Skipping ignore verification

- **Problem:** Worktree contents get tracked, pollute git status
- **Fix:** Always use `git check-ignore` before creating project-local worktree

### Assuming directory location

- **Problem:** Creates inconsistency, violates project conventions
- **Fix:** Follow priority: existing > CLAUDE.md > ask

### Proceeding with failing tests

- **Problem:** Can't distinguish new bugs from pre-existing issues
- **Fix:** Report failures, get explicit permission to proceed

### Hardcoding setup commands

- **Problem:** Breaks on projects using different tools
- **Fix:** Auto-detect from project files (package.json, etc.)

## Example Workflow

```
You: I'm using the using-git-worktrees skill to set up an isolated workspace.

[Check .worktrees/ - exists]
[Verify ignored - git check-ignore confirms .worktrees/ is ignored]
[Create worktree: git worktree add .worktrees/auth -b feature/auth]
[Run npm install]
[Run npm test - 47 passing]

Worktree ready at /Users/jesse/myproject/.worktrees/auth
Tests passing (47 tests, 0 failures)
Ready to implement auth feature
```

## Red Flags

**Never:**
- Create worktree without verifying it's ignored (project-local)
- Skip baseline test verification
- Proceed with failing tests without asking
- Assume directory location when ambiguous
- Skip CLAUDE.md check

**Always:**
- Follow directory priority: existing > CLAUDE.md > ask
- Verify directory is ignored for project-local
- Auto-detect and run project setup
- Verify clean test baseline

## Integration

**Called by:**
- **brainstorming** (Phase 4) - REQUIRED when design is approved and implementation follows
- **subagent-driven-development** - REQUIRED before executing any tasks
- **executing-plans** - REQUIRED before executing any tasks
- Any skill needing isolated workspace

**Pairs with:**
- **finishing-a-development-branch** - REQUIRED for cleanup after work complete


## Anti-Rationalization Table

| Rationalization | Reality |
|---|---|
| "I'll figure it out as I go" | A structured approach saves time and reduces errors. Follow the workflow in this skill rather than improvising. |
| "I already know this topic" | Familiarity breeds shortcuts. Use the checklist to verify you haven't missed critical steps. |
| "This doesn't apply to my situation" | The patterns here generalize across contexts. Adapt, don't skip — the underlying principles hold. |
| "One more tool will fix it" | Adding complexity rarely solves process gaps. Master the core workflow first. |

## When to Use

**Trigger phrases:**
- "using git worktrees"
- "Starting feature work that needs isolation"
- "Before executing implementation plans"
- "Working on multiple branches simultaneously"


- Starting feature work that needs isolation
- Before executing implementation plans
- Working on multiple branches simultaneously
- When you need clean test baseline
- Any work that shouldn't affect main workspace

## When NOT to Use

- Simple quick fixes in main branch
- When you only have one task
- Read-only operations
- When worktree isn't supported (some legacy systems)

## Common Rationalizations

| Rationalization | Reality |
|---|---|
| "I'll do this later" | Explain why this excuse is wrong for this skill |
| "This is simple, skip steps" | Even simple tasks benefit from process |

## Verification

After completing this skill, confirm:

- [ ] Worktree branch is kept reasonably current with main
- [ ] Abandoned worktrees are identified and cleaned up
- [ ] All required outputs generated
- [ ] Success criteria met

## Process

1. Analyze the task requirements
2. Apply domain expertise
3. Verify output quality