Reuse the exact selected advertised descriptor for SDK output validation instead of compiling the entire cached catalog for every fresh parity-test client. Retain actual catalog discovery, schema validation, and all result assertions under the existing worker heap limit.
Retain every focus declaration with its display header and identity, including explicit absence, unknown identities and duplicates. Derive singular summaries only for one unambiguous context; preserve scope and ambiguity through named CLI/MCP contracts.
Validation: original public CLI replay before/after, four failing baseline parser controls, 23 focused checks plus 11 overlapping provider/parser controls, converted MCP schemas, check:fast and docs:check. Bounded completed synthetic CLI warm reply tokens 282/513, elapsed 0.391/0.403s and CPU 0.622/0.622s; no efficiency claim. No live Android, vendor or large-output qualification. Refs #4660.