Skill: clean

On load: Read ../../.claude-plugin/plugin.json from this skill's base directory. Display clean v{version} before proceeding.

Diagnose-first environment reset for React Native projects. Checks what is actually stale before cleaning, then executes only the necessary steps.

---

Workflow

1. Diagnose

Run the diagnosis script to check environment state:

bash ${CLAUDE_SKILL_DIR}/scripts/diagnose.sh

This outputs a JSON report covering all cache/state checks. Review the report and summarize findings for the user.

2. Recommend

Based on the diagnosis, recommend targeted clean steps. Present only what is needed — do not suggest cleaning things that are healthy.

3. Clean

Run the clean script with flags for the necessary targets:

bash ${CLAUDE_SKILL_DIR}/scripts/clean.sh [flags]

WARNING: Always confirm with the user before running destructive clean operations.
Do not run --all or --node-modules without explicit user approval.

4. Verify (optional)

After cleaning, optionally verify the environment works:

• Start Metro: npx react-native start
• Launch app via ios-sim skill if available

---

Clean Targets

Flag	What it removes	When to use
--metro	/tmp/metro-*, /tmp/haste-*, React Native temp caches	Metro bundling errors, stale module resolution
--watchman	Watchman watches and internal state	File change detection broken, phantom "file not found" errors
--node-modules	node_modules/ + reinstall	Dependency corruption, version mismatch after branch switch
--pods	ios/Pods/, ios/Podfile.lock re-install	iOS build errors after native dependency changes
--derived-data	~/Library/Developer/Xcode/DerivedData	Xcode build failures, stale Swift/ObjC caches
--gradle	android/.gradle/, android/app/build/	Android build failures, stale Gradle caches
--all	All of the above	True nuclear option — last resort

Diagnosis Checks

Check	How	Indicates
Port 8081	lsof -i :8081	Metro already running / port conflict
Watchman	watchman watch-list	Stale or broken file watches
node_modules integrity	Compare .package-lock.json mtime vs package-lock.json	Modules out of sync with lockfile
Pods staleness	Compare ios/Pods mtime vs ios/Podfile mtime	Pods need reinstall
DerivedData size	du -sh ~/Library/Developer/Xcode/DerivedData	Large DerivedData may cause issues
Android build state	Check android/.gradle, android/app/build existence	Stale Android build artifacts
Metro cache	Check /tmp/metro-* existence	Stale Metro bundler cache

Tips

• Start with diagnosis — most issues only need 1-2 targeted cleans, not a full nuke
• --pods will run pod install after removing Pods
• --node-modules will run npm install (or yarn) after removing node_modules
• If Metro won't start, check port 8081 first — often a zombie process is the cause
• Cross-reference build errors with the docs skill for API/config guidance