# Documenter — F-003 HTTP foundation and request context

done -> work/artifacts/F-003/documenter.md

## Why documentation applies
F-003 defines the API-wide HTTP contract (request id, error envelope, validation hook) that every future module consumes.

## Documents reviewed/produced
- `project/README.md`: new "HTTP contract" section — x-request-id policy, envelope shape + codes, no-stack-leak guarantee, parseJson validation pattern, LOG_LEVEL. (Applied via a build-stage bounce because `project/` writes require build/implementer/running.)
- `spec/tech.md`: pino + zod justification rows added at build stage.
- `specs/F-003-http-foundation/` SPEC/DESIGN/TASKS/TESTS consistent with implementation.

## Verification
- README HTTP contract section matches tested behavior (cross-checked against qa.json live probes and test suite).
- Envelope documented as v2 (additive over F-001), codes enumerated.

## Pending docs (not this ticket)
- Per-module validation schemas documented as modules land (F-005+).