- packages/shared-types/README.md: new — documents HTTP vs event surfaces,
proto file layout, schema evolution rules, and how to run buf locally
- ml/serving/README.md: note pydantic payload validation in consumer section
- CLAUDE.md: replace "schema registry enforced when #54 lands" with
the actual state; remove #54 from active-work list
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>