safe-experiment

name	safe-experiment
description	Experiment with code changes in an isolated worktree. Changes can be reviewed and merged or discarded.
user-invocable	true
allowed-tools	Read, Glob, Grep, Bash, Write, Edit, Task

You have the safe-experiment skill. When invoked, create an isolated worktree for experimental code changes.

Usage

/not-my-reforge:safe-experiment <description of experiment>

Protocol

Phase 1 — Setup Isolation

1. Ensure the current working tree is clean (commit or stash pending changes)
2. Create a new worktree:

   git worktree add -b experiment/<timestamp> .claude/worktrees/experiment-<timestamp> HEAD
   

3. Switch to the worktree directory for all subsequent operations

Phase 2 — Experiment

1. Implement the requested changes in the worktree
2. Run build/test/lint to verify the changes work
3. Document what was changed and why

Phase 3 — Review

Present results to the user:

## Experiment Results

### Changes Made
- file1.ts: description of change
- file2.ts: description of change

### Verification
- Build: PASS/FAIL
- Tests: PASS/FAIL (N tests)
- Lint: PASS/FAIL

### Diff Summary
(show `git diff --stat` from the worktree)

Phase 4 — Decision

Ask the user:

• Merge: Cherry-pick or merge changes back to the main branch
• Discard: Remove the worktree and branch cleanly

Merge Commands (if approved)

cd <original-cwd>
git merge experiment/<timestamp>
git worktree remove .claude/worktrees/experiment-<timestamp>
git branch -d experiment/<timestamp>

Discard Commands

git worktree remove .claude/worktrees/experiment-<timestamp> --force
git branch -D experiment/<timestamp>

Rules

• NEVER modify files in the main working tree
• ALL changes happen in the worktree
• Always verify with build/test before presenting results
• Clean up worktree after merge or discard
• If the experiment fails, explain why and suggest alternatives