Summary

Release v4.12.9 (2026-03-23) — patch release containing several bug fixes and a TypeScript client type enhancement. This update prevents a runtime TypeError in request body caching, improves SSG and service-worker behaviors, and tightens CORS handling when credentials are enabled.

Key Points

• fix(request): remove parseBody from bodyCache to prevent a TypeError when reusing cached request bodies. Update to avoid runtime crashes when body caching is used.
• feat(client): add PickResponseByStatusCode type — new TypeScript utility to map response types by status code for safer client typings.
• fix(ssg): pass SSG_CONTEXT to forGetInfoURLRequest so SSG handlers receive the expected context during URL info requests.
• fix(service-worker): make fire() fallback behavior consistent with handle(), aligning service-worker event handling and reducing edge-case differences.
• fix(cors): when credentials is true and the configured origin is a wildcard, reflect the incoming request origin instead of returning '*', complying with CORS rules.

Upgrade Notes

• No breaking changes reported. Recommended to upgrade to pick up the runtime fixes and TypeScript improvements.
• New contributors in this release: @yuintei, @ctonneslan.