- Added new reply utilities (reply.notFound(), buffer support in reply.send), request body size limit option, and automatic logging on server listen.
- Breaking changes: onSend hooks now fire for streams, preHandler hooks run for 404 handlers, and route prefix handling refactored to accept strings.
- Fixed CVE-2018-3711, corrected payload handling bugs, improved TypeScript typings, prevented uncaught exceptions on aborts, and updated documentation and community pages.
v0.38.0
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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.