- 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>