Simplify or remove argument-hint frontmatter from core workflow skills.
The bracket syntax was confusing users into thinking input was required
when most skills work fine invoked bare.
- ce:review: rewrite to clarify blank usage is the default
- ce:work, ce:work-beta: clarify blank auto-uses latest plan doc
- ce:plan: add "optional:" prefix for clarity
- ce:ideate: drop redundant "optional:" since brackets imply it
- ce:compound, ce:compound-refresh: remove hint entirely
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>