dex-doctor

Whole-system checkup: verifies every Dex feature honestly (working/off/broken/couldn't-check), self-heals what's provably safe, guides the rest. Use when the user says 'is Dex healthy', 'something's broken', 'check my setup', 'run diagnostics'. Not for discovering unused *features*; use dex-level-up. Not for applying an update; use dex-update.