{"input": {"before": {"openapi": "3.0.3", "paths": {"/items": {"get": {"responses": {"200": {"description": "OK"}}}}}}, "after": {"openapi": "3.0.3", "paths": {}}}, "output": {"check_version": "1.0", "operations_checked": 1, "finding_count": 1, "findings": [{"code": "operation_removed", "path": "/items", "method": "GET", "detail": "Previously declared operation is absent; references are not resolved."}], "limitations": ["Surface checks only; not a complete compatibility or security audit.", "Does not compare schemas, authentication, servers, media types, callbacks, or parameter constraints.", "References are not resolved. Only inline parameters and request bodies are checked.", "Accepts OpenAPI 3.0/3.1 JSON only; no YAML or remote URL fetching.", "Removed response codes are review candidates, not necessarily breaking changes."]}}