- Added new APIs: expose findRoute and param validator, setGenReqId method, semicolon-delimited config option, and Web Stream API support.
- Fixed multiple bugs: correct serializer when content type is missing, validator compiler with addSchema, onListen hook execution, findRoute exposure restrictions, and resource cleanup.
- Improved documentation: updated ecosystem plugin list, added ESM usage example, clarified setErrorHandler, and fixed links and punctuation.
v4.26.0
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Fix for two Fastify security advisories (GHSA‑w2qp‑rph6‑63g4 and GHSA‑3m5p‑2c4r‑xxw2).
Added per‑route logging for Google Cloud Functions and introduced `Reply.prototype.mediaType` for easier content‑type handling.
Fixed trailer state clearing when removing all trailers and corrected requestCompleted handling to use null instead of undefined.