Invocation Doctor

1. Create positive, near-miss negative, and ambiguous trigger cases.
2. Split cases before optimizing; do not tune on every example.
3. Use Waza when available to run the actual trigger suite.
4. Rewrite only the skill description first; avoid bloating the body to solve discovery.
5. Compare held-out precision/recall before vs after.
6. Publish both regressions and improvements.