Decision: advertise == enforce. The key allowlist (OAI-02) stays as the
first gate with its established unknown-key message; a compiled leaf
validator now runs second, so required/type/enum/pattern/bounds
violations surface as INVALID_INPUT 422 naming the keyword — not as
upstream round-trips.
- new src/adapters/input_validation.rs: CompiledInputSchema compiles an
op's input_schema once at import with the jsonschema crate (same
2020-12 dialect publish_schema uses) and validates peer input at call
time; the compile-time copy is hardened closed-by-default
(additionalProperties: false injected when absent) so the validator
reproduces the allowlist's unknown-key semantics; explicit
additionalProperties:true catch-all and schema values are preserved;
the original spec value is never mutated
- from_openapi/from_jsonschema import(): compile per registration,
capture the validator in the handler closure (re-import recompiles —
the closure capture is the invalidation story); a non-compilable
input schema fails import loudly (AdapterError::SchemaParse naming
the operation), matching the publish_schema fail-closed precedent
- from_openapi generated input schemas now carry
additionalProperties:false explicitly, so the /schema advert states
the enforced rule and external schema-driven validators reach the
same verdicts
- forward/forward_stream/build_request gain an
Option<&CompiledInputSchema> parameter; enforcement runs after the
allowlist
- round-trip test (review 002 Test-gap 10): the /schema-exported
input_schema is compiled with the same validator and driven against
build_request over a 10-input violation matrix — accept-sets exactly
equal in both directions; the chain-test that lets advertise/enforce
drift surface as a CI failure
- ADR-066: new decision section (advertise==enforce) with the trust-
boundary reasoning and the rejected option (b) rationale
- module + enforce_input_schema docs updated to the two-gate shape
cargo test --all-features 596 pass; clippy --all-features/-D warnings,
fmt, doc gates clean.
docs(tasks): mark review-002-fu-oai18-decision done
glm-5.3-flash
2ec02fd578