OpenAPI Consumer Impact & Breaking Change Gate

A local OpenAPI change gate that maps supported breaking changes to a buyer-supplied consumer registry instead of reporting an undifferentiated diff.

This downloadable local package turns authorized buyer-supplied files into a fixed, reproducible review packet. It includes an installable Python CLI, a local stdio MCP adapter and a companion Agent Skill.

Outputs

result.json, changes.jsonl, impact-matrix.csv, issues.jsonl, OPENAPI_IMPACT.md and evidence-receipt.json

The core is deterministic, rejects unsafe paths and malformed inputs, never overwrites an existing packet, escapes formula-active CSV cells and binds each input and output with SHA-256. Processing stays local. No API key, login, upload, telemetry or live external action is included.

Best for

API teams and integration agencies reviewing OpenAPI changes against known consumers

Requirements

Windows 11 and Python 3.11–3.14; authorized local evidence files in the documented schemas; optional mcp==2.2.0 for the local MCP adapter.

Limitations

No remote references, YAML, exhaustive OpenAPI conformance claim, code generation, CI modification, deployment or runtime traffic analysis. Demand and sales are not guaranteed; this is a one-time local V1.