Prepare both smoke output validators

docs/roadmap/implementation.md

@@ -208,6 +208,11 @@ final validation without adding transitional code or an intermediate gate.
 
 ## Stage 7: Use Prepared Plans For Both Smoke Output Checks
 
+**Completed:** Smoke inference prepares separate JSON and schema plans and
+checks syntax before schema matching. Go 1.27.3 `go test ./internal/usecase
+-run 'Smoke|Diagnostic'` passed, including malformed, scalar, matching,
+nonmatching, cancellation, and dispatch cases.
+
 **Finding:** 4. **Files:** `internal/usecase/smoke_inference_case.go` and diagnostic tests.
 
 1. Replace the smoke case's `jsonValidator validate.Validator` with a