SchemaGuard

SchemaGuard is a web app + CLI that prevents accidental breaking changes in APIs before they ship. It ingests OpenAPI/AsyncAPI/GraphQL schemas from your repo or gateway, compares them against the last released version, and produces a “client impact” report: what endpoints changed, which fields became required, which enums shrank, and what common SDKs will likely fail. It then posts a concise summary directly into pull requests and CI, with a strict “fail build” mode for high-risk changes. The AI layer helps by generating human-readable migration notes and suggesting non-breaking alternatives (e.g., add new field vs. repurpose). It also tracks versioning discipline over time (semver drift, undocumented changes) so teams can see whether they’re improving. Realistically, this wins only if it’s fast, accurate, and integrates cleanly into existing CI/CD without becoming noisy.