- Empty selections are 422 and duplicates run once in primary-key order
- A completed retry and an all-absent selection delete nothing and skip hooks
- Mixed, hook, cancel, and concurrent requests keep the batch atomic
- Mount show, create, update, and delete behind the backend permission check
- Run controller and model hooks once per operation and roll back on failure
- Treat missing and out-of-scope records the same, including idempotent delete
- Record routes must enforce permission before ids or bodies and return D-10 envelopes
- Create, update, and delete run Before and After hooks once inside the transaction
- Out-of-scope and missing records are indistinguishable, and hook failure rolls back
- Bind schema fields to model columns at activation and drop protected keys
- Create and update Fill, run BeforeValidate, then Validate before persistence
- Missing Fill or Validate capability and provider errors fail closed
- Create and update must Fill then Validate and return D-10 422 field errors
- Schema bindings exclude protected, cased, nested, and unknown keys
- Missing Fill or Validate capability fails closed with controller context
