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---
name: project-api-validation
description: Apply this repository's request-validation and structured error-catalog contract when public API acceptance or rejection changes.
metadata:
job: api-error-catalog-maintenance
---
# Project API validation
For public request-validation changes:
1. Preserve absent, empty, and already accepted inputs.
2. Reject invalid input with `errors.problem(field, code)` before queue, registry,
outbox, or other durable mutation.
3. Name a new enum error `INVALID_<UPPERCASE_FIELD>` and add it to
`contracts/error-codes.json`, keeping that catalog sorted and unique.
4. Never mutate the caller-owned request.
5. Run the unit suite and `python3 tools/verify_error_catalog.py`.
Do not use this capability for internal algorithms or release documentation.
