--- title: "using-git-worktrees by obra | skilld" canonical_url: "https://skilld.dev/gh/obra/superpowers/using-git-worktrees" last_updated: "2026-05-08T19:40:23.461Z" meta: description: "Detects whether you are already in an isolated workspace, then creates one using native platform tools or git worktrees as a fallback. Sets up dependencies and verifies a… From obra/superpowers." "og:description": "Detects whether you are already in an isolated workspace, then creates one using native platform tools or git worktrees as a fallback. Sets up dependencies and verifies a… From obra/superpowers." "og:title": "using-git-worktrees by obra" "twitter:description": "Detects whether you are already in an isolated workspace, then creates one using native platform tools or git worktrees as a fallback. Sets up dependencies and verifies a… From obra/superpowers." "twitter:title": "using-git-worktrees by obra" --- [All skills](https://skilld.dev/skills) [![obra avatar](https://github.com/obra.png?size=96)obra/superpowers repository](https://skilld.dev/gh/obra/superpowers) # **/using-git-worktrees** [obra](https://skilld.dev/gh/obra)/ [superpowers](https://skilld.dev/gh/obra/superpowers) 259,815 23,167 Use when starting feature work that needs isolation from current workspace or before executing implementation plans - ensures an isolated workspace exists via native tools or git worktree fallback 15,581/wk Updated 15 hours ago Trust [Git/VCS](https://skilld.dev/skills/tag/git "Git operations, branching, history surgery") [ worktrees](https://skilld.dev/skills/tag/worktrees) [ isolation](https://skilld.dev/skills/tag/isolation) [ workspace](https://skilld.dev/skills/tag/workspace) [ git-worktree](https://skilld.dev/skills/tag/git-worktree) [ branch-management](https://skilld.dev/skills/tag/branch-management) [ development-workflow](https://skilld.dev/skills/tag/development-workflow) ## Skill content ## Using Git Worktrees ### Overview Ensure work happens in an isolated workspace. Prefer your platform's native worktree tools. Fall back to manual git worktrees only when no native tool is available. **Core principle:** Detect existing isolation first. Then use native tools. Then fall back to git. Never fight the harness. **Announce at start:** "I'm using the using-git-worktrees skill to set up an isolated workspace." ### Step 0: Detect Existing Isolation **Before creating anything, check if you are already in an isolated workspace.** ``` GIT_DIR=$(cd "$(git rev-parse --git-dir)" 2>/dev/null && pwd -P) GIT_COMMON=$(cd "$(git rev-parse --git-common-dir)" 2>/dev/null && pwd -P) BRANCH=$(git branch --show-current) ``` **Submodule guard:** `GIT_DIR != GIT_COMMON` is also true inside git submodules. Before concluding "already in a worktree," verify you are not in a submodule: ``` # If this returns a path, you're in a submodule, not a worktree — treat as normal repo git rev-parse --show-superproject-working-tree 2>/dev/null ``` **If `GIT_DIR != GIT_COMMON` (and not a submodule):** You are already in a linked worktree. Skip to Step 2 (Project Setup). Do NOT create another worktree. Report with branch state: - On a branch: "Already in isolated workspace at `` on branch ``." - Detached HEAD: "Already in isolated workspace at `` (detached HEAD, externally managed). Branch creation needed at finish time." **If `GIT_DIR == GIT_COMMON` (or in a submodule):** You are in a normal repo checkout. Has the user already indicated their worktree preference in your instructions? If not, ask for consent before creating a worktree: > "Would you like me to set up an isolated worktree? It protects your current branch from changes." Honor any existing declared preference without asking. If the user declines consent, work in place and skip to Step 2. ### Step 1: Create Isolated Workspace **You have two mechanisms. Try them in this order.** #### 1a. Native Worktree Tools (preferred) The user has asked for an isolated workspace (Step 0 consent). Do you already have a way to create a worktree? It might be a tool with a name like `EnterWorktree`, `WorktreeCreate`, a `/worktree` command, or a `--worktree` flag. If you do, use it and skip to Step 2. Native tools handle directory placement, branch creation, and cleanup automatically. Using `git worktree add` when you have a native tool creates phantom state your harness can't see or manage. Only proceed to Step 1b if you have no native worktree tool available. #### 1b. Git Worktree Fallback **Only use this if Step 1a does not apply** — you have no native worktree tool available. Create a worktree manually using git. ##### Directory Selection Follow this priority order. Explicit user preference always beats observed filesystem state. 1. **Check your instructions for a declared worktree directory preference.** If the user has already specified one, use it without asking. 2. **Check for an existing project-local worktree directory:** ``` ls -d .worktrees 2>/dev/null # Preferred (hidden) ls -d worktrees 2>/dev/null # Alternative ``` If found, use it. If both exist, `.worktrees` wins. 3. **If there is no other guidance available**, default to `.worktrees/` at the project root. ##### Safety Verification (project-local directories only) **MUST verify directory is ignored before creating worktree:** ``` git check-ignore -q .worktrees 2>/dev/null || git check-ignore -q worktrees 2>/dev/null ``` **If NOT ignored:** Add to .gitignore, commit the change, then proceed. **Why critical:** Prevents accidentally committing worktree contents to repository. ##### Create the Worktree ``` # Determine path based on chosen location path="$LOCATION/$BRANCH_NAME" git worktree add "$path" -b "$BRANCH_NAME" cd "$path" ``` **Sandbox fallback:** If `git worktree add` fails with a permission error (sandbox denial), tell the user the sandbox blocked worktree creation and you're working in the current directory instead. Then run setup and baseline tests in place. ### Step 2: Project Setup Auto-detect and run appropriate setup: ``` # 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 ``` ### Step 3: Verify Clean Baseline Run tests to ensure workspace starts clean: ``` # 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. #### Report ``` Worktree ready at Tests passing ( tests, 0 failures) Ready to implement ``` ### Quick Reference | Situation | Action | | --- | --- | | Already in linked worktree | Skip creation (Step 0) | | In a submodule | Treat as normal repo (Step 0 guard) | | Native worktree tool available | Use it (Step 1a) | | No native tool | Git worktree fallback (Step 1b) | | `.worktrees/` exists | Use it (verify ignored) | | `worktrees/` exists | Use it (verify ignored) | | Both exist | Use `.worktrees/` | | Neither exists | Check instruction file, then default `.worktrees/` | | Directory not ignored | Add to .gitignore + commit | | Permission error on create | Sandbox fallback, work in place | | Tests fail during baseline | Report failures + ask | | No package.json/Cargo.toml | Skip dependency install | ### Common Mistakes #### Fighting the harness - **Problem:** Using `git worktree add` when the platform already provides isolation - **Fix:** Step 0 detects existing isolation. Step 1a defers to native tools. #### Skipping detection - **Problem:** Creating a nested worktree inside an existing one - **Fix:** Always run Step 0 before creating anything #### 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: explicit instructions > existing project-local directory > default #### Proceeding with failing tests - **Problem:** Can't distinguish new bugs from pre-existing issues - **Fix:** Report failures, get explicit permission to proceed ### Red Flags **Never:** - Create a worktree when Step 0 detects existing isolation - Use `git worktree add` when you have a native worktree tool (e.g., `EnterWorktree`). This is the #1 mistake — if you have it, use it. - Skip Step 1a by jumping straight to Step 1b's git commands - Create worktree without verifying it's ignored (project-local) - Skip baseline test verification - Proceed with failing tests without asking **Always:** - Run Step 0 detection first - Prefer native tools over git fallback - Follow directory priority: explicit instructions > existing project-local directory > default - Verify directory is ignored for project-local - Auto-detect and run project setup - Verify clean test baseline Source: [SKILL.md on GitHub](https://github.com/obra/superpowers/blob/d00f4ad4428e99db18619e077b99340fb7158f2f/skills/using-git-worktrees/SKILL.md) ## What it does Detects whether you are already in an isolated workspace, then creates one using native platform tools or git worktrees as a fallback. Sets up dependencies and verifies a clean test baseline before proceeding with feature work. Generated from this skill's SKILL.md. ## Frequently asked
What if I'm already in a git worktree? Step 0 detects existing isolation and skips worktree creation. You'll be reported as already in an isolated workspace and can proceed directly to project setup.
Does this skill use native worktree tools or git worktree? It prefers native worktree tools first (like EnterWorktree or platform-specific commands), then falls back to manual git worktree only when no native tool is available.
Where will the worktree be created? Priority order: declared user preference, existing `.worktrees/` or `worktrees/` directory in the project, legacy global path at ~/.config/superpowers/worktrees/, or default to `.worktrees/` at project root.
What happens if the worktree directory isn't in .gitignore? For project-local directories, the skill verifies with git check-ignore and adds the directory to .gitignore before creating the worktree to prevent accidentally tracking worktree contents.
What if baseline tests fail after setup? The skill reports the failures and asks for explicit permission before proceeding, to distinguish pre-existing issues from new bugs introduced during work.
Generated from the skill's SKILL.md. Refreshed when the source changes. ## Related skills [![obra avatar](https://github.com/obra.png?size=48) /using-superpowers obra/superpowers Use when starting any conversation - establishes how to find and use skills, requiring skill invocation before ANY response including clarifying questions](https://skilld.dev/gh/obra/superpowers/using-superpowers) [![obra avatar](https://github.com/obra.png?size=48) /writing-plans obra/superpowers Use when you have a spec or requirements for a multi-step task, before touching code](https://skilld.dev/gh/obra/superpowers/writing-plans) [![obra avatar](https://github.com/obra.png?size=48) /systematic-debugging obra/superpowers Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes](https://skilld.dev/gh/obra/superpowers/systematic-debugging) [![obra avatar](https://github.com/obra.png?size=48) /test-driven-development obra/superpowers Use when implementing any feature or bugfix, before writing implementation code](https://skilld.dev/gh/obra/superpowers/test-driven-development) [![obra avatar](https://github.com/obra.png?size=48) /executing-plans obra/superpowers Use when you have a written implementation plan to execute in a separate session with review checkpoints](https://skilld.dev/gh/obra/superpowers/executing-plans) [![obra avatar](https://github.com/obra.png?size=48) /requesting-code-review obra/superpowers Use when completing tasks, implementing major features, or before merging to verify work meets requirements](https://skilld.dev/gh/obra/superpowers/requesting-code-review)