[tmashara]

• renderdiff probe takes an allow-list of the flags it uses (--config, --left, --width, --loads, --concurrency, --mask, --hide, --mask-media, --no-freeze-video, --storage-state, --help, --version). Any other flag exits 2 with probe does not take <flag>.
• It uses the storage state of the config side whose origin the URL is on. If the URL is on neither side, it uses the right side's state if one is set, then the left side's. Before this, probe always used the left side's state, even though SKILL.md says to probe <right><route>.
• It prints the storage state it chose (Storage state: <path> (<side>)). Without --width, it prints the width it uses: Width: 1440 (first of …; --width <n> for another).

Behaviour change: flags probe used to ignore now exit 2. Examples are --dry-run (which used to start a browser anyway), --out, --threshold, --computed and --left-/--right-storage-state.

Testing

• New unit tests in tests/unit/cli-args.test.ts:
  • --dry-run, --out=x and --left-storage-state are refused.
  • The fallback width line is printed, and is absent when --width is given.
  • The storage-state side is picked for a left URL, a right URL, a URL on neither side, and a URL on neither side when only the left side has a state.
• npm run typecheck, npm run lint, npm run format:check and npm test pass (391/391). The visual suite was not run.

🤖 Generated with Claude Code