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fastify: changelog & breaking changes
Auto-tracked from github.com/fastify/fastify. Updated Jun 28, 2026.
v5.9.0
2026-06-28
⚠ Potential breaking changes
- docs: remove deprecated leveldb plugin and update ecosystem by @Tony133 in https://github.com/fastify/fastify/pull/6661
- docs(Warnings): remove retired FSTWRN002 warning code by @leestana01 in https://github.com/fastify/fastify/pull/6754
- chore: migrate type tests to TSTyche assertions (part one) by @mrazauskas in https://github.com/fastify/fastify/pull/6726
- chore: migrate type tests to TSTyche assertions (part two) by @mrazauskas in https://github.com/fastify/fastify/pull/6727
- docs: remove HackerOne reporting link by @jhcpeixoto in https://github.com/fastify/fastify/pull/6735
- docs: migrate Zod type provider to official @fastify package by @Tony133 in https://github.com/fastify/fastify/pull/6686
v5.8.5
2026-04-14
No breaking-change keywords detected in release notes.
v5.8.4
2026-03-23
No breaking-change keywords detected in release notes.
v5.8.3
2026-03-23
No breaking-change keywords detected in release notes.
v5.8.2
2026-03-07
No breaking-change keywords detected in release notes.
v5.8.1
2026-03-05
No breaking-change keywords detected in release notes.
v5.8.0
2026-03-05
⚠ Potential breaking changes
- refactor(test-types): migrate dummy-plugin to FastifyPluginAsync by @Tony133 in https://github.com/fastify/fastify/pull/6472
- ci: remove tests-checker workflow by @Tony133 in https://github.com/fastify/fastify/pull/6481
- ci: remove stale.yml file by @Tony133 in https://github.com/fastify/fastify/pull/6504
- docs(security): remove hackerone references; change note style by @Fdawgs in https://github.com/fastify/fastify/pull/6501
- chore: remove unused `tsconfig.eslint.json` by @mrazauskas in https://github.com/fastify/fastify/pull/6524
- fix: remove format placeholder from FST_ERR_CTP_INVALID_MEDIA_TYPE message by @super-mcgin in https://github.com/fastify/fastify/pull/6528
- ci: remove broken links and add ecosystem link validator by @mcollina in https://github.com/fastify/fastify/pull/6421
- style: remove trailing whitespace by @Fdawgs in https://github.com/fastify/fastify/pull/6543
v5.7.4
2026-02-02
No breaking-change keywords detected in release notes.