feat: derive service-projection metadata for the catalog#4
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Adds parser/enrich.py: a clang-free pass that derives, for every function and opaque type, the metadata a service generator (OpenAPI/MCP/gRPC) needs but that C headers do not contain: - category (constructor/predicate/io/accessor/transformation/...) - typeEncodings: per opaque type, its text/MF-JSON/WKB in/out functions - network.exposable: whether the function maps to a stateless endpoint, with a precise reason when it does not (array/out-param, no encoder/ decoder, lifecycle, index) - wire: per-parameter and return request/response representation Matches the canonical C spellings libclang emits (struct-qualified names, unsigned char, int-returning predicates) and treats enums as scalars. Runs before merge_meta so every derived field is overridable from meta/meos-meta.json. Wired into run.py as step 2/3, documented in docs/enrichment.md, and tested on real signatures in tests/test_enrich.py (stdlib unittest, no libclang/pytest needed). Validated against the live MobilityDB master catalog: 2672 functions, 1790 (67%) stateless-exposable.
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What
Adds
parser/enrich.py— a libclang-free pass that derives, for everyfunction and opaque type in the catalog, the metadata a service generator
(OpenAPI / MCP / gRPC) needs but that C headers do not contain:
category— constructor / predicate / io / accessor / transformation / conversion / setop / aggregate / lifecycle / index.typeEncodings— per opaque C type, its text / MF-JSON / WKB in/out functions (the wire round-trip).network.exposable— whether the function maps onto a stateless endpoint, with a precise machine-readablereasonwhen it does not (array-or-out-param:…,no-encoder:…,no-decoder:…,lifecycle,index).wire— per-parameter and return request/response representation.enrichmentsummary (categoryCounts,exposableFunctions) for coverage tracking.Why
This is the foundation for projecting MEOS onto a network API. It turns
"what can be exposed over HTTP/MCP" from a manual judgement into a
per-function, machine-checkable verdict, while keeping the door open for
hand curation.
Design
merge_meta, so every derived field is overridable perfunction/type from
meta/meos-meta.json.run.pyas step 2/3.functions/structs/enumsentries areunchanged (new keys only), so existing consumers keep working.
docs/enrichment.md.tests/test_enrich.py: 13 tests on real MEOS signatures, stdlibunittestonly (no libclang/pytest needed) —python3 tests/test_enrich.py.Follow-up
The override surface enables incremental hand-curation of categories and
exposability in
meta/meos-meta.json, and a downstream generator(OpenAPI/MCP) that consumes
network/wire/typeEncodings.