Worktree Policy Skill

Purpose

Enforce the mandatory use of git worktrees for all file modifications in multi-agent environments. Worktrees provide complete isolation between agents working on different features.

When to Use

• Before any file modification
• When starting a new task
• When another agent is already working
• Before editing protected files

Trigger Phrases

• "edit this file"
• "modify the code"
• "update the document"
• "make changes to"

Core Rule

WORKTREE IS MANDATORY FOR ALL FILE MODIFICATIONS
Overhead: ~3 seconds | Benefit: Complete isolation

Valid Exceptions (Only 3)

1. READ-ONLY: Analysis without file modification
2. APPEND-ONLY: tasks.md, sessions.json (add lines only)
3. USER EXPLICIT REQUEST: Documented in tasks.md

Worktree Commands

Create Worktree

git worktree add .worktrees/{agent-hex}-{feature} -b {tipo}/{name}
cd .worktrees/{agent-hex}-{feature}

# Example:
git worktree add .worktrees/c614-policy -b docs/policy-c614

List Worktrees

git worktree list

Remove Worktree

rm -rf .worktrees/{agent}-{feature}
git worktree prune

Naming Standards

Directory

.worktrees/{agent-short}-{feature-kebab}/

Branch

{tipo}/{escopo}-{agent-hex}

Type	Use
feature/	New functionality
bugfix/	Bug correction
hotfix/	Urgent fix
docs/	Documentation
refactor/	Refactoring
chore/	Maintenance

Lifecycle

CREATE → WORK → VALIDATE QA → MERGE → CLEANUP

Retention Policy

Event	Action	Deadline
PR merged	Delete worktree	24h
Task completed	Delete worktree	72h
Worktree stale	Evaluate and clean	Immediate
Maximum absolute	Force cleanup	7 days

Enforcement

If you are editing a file without being in a worktree:

1. STOP immediately
2. Create worktree
3. Continue from there

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Skill based on Worktree Policy v1.1 | multi-agent-os