- Improved typings for RouteShorthandOptions (constraints) and added async/callback style warnings for plugins, plus Uint8Array payload support in reply.send.
- Fixed several type and runtime bugs: async hooks compatibility, secondary binding cleanup, route method typings, reply.context deprecation warning, and added a handler property to route options.
- Migrated internal warnings to official deprecation warnings and expanded documentation (security badge, ecosystem plugins, stream/buffer handling, etc.).
v4.25.0
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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.