Answer: The latest version of Fastify is 5.12.8.
Status: Confirmed
Entry: version/fastify
Revision: 1
Digest: sha256:c08ff49f9e7e5b17 (changes whenever the content changes)

Timeline:
  Created: 2026-11-12T11:23:42Z
  Last changed: 2026-11-12T11:23:42Z
  Last verified: 2026-11-12T11:33:53Z
  Next check: 2026-11-13T11:33:53Z
  Check interval: Daily
  Expected change: New releases are published at no fixed schedule.

Data:
  Field | Value | Source | As of
  Latest version | 5.12.8 | [1] | 2026-11-12

Sources:
  [1] npm registry (fastify). "Fastify: release information". https://registry.npmjs.org/fastify/latest
      Role: primary. Accessed: 2026-11-12T11:33:53Z
      Quote: ""version":"5.12.8"" (Supports: Latest version)
      Published: 2026-11-12T11:31:20Z
      Snapshot SHA-256: c7b2276930c0042b53379e63996f39a2f65611f6056f57dd235286274cf9394d (captured 2026-11-12T11:23:42Z)

Verification:
  Method: Read by code directly from the structured data published at [1]; no language model was involved. Every value appears verbatim in a quoted passage of [1]. On this check the text of [1] was unchanged since 2026-11-12T11:23:42Z, so the values verified then were kept.
  Cross-check: not-available at 2026-11-12T11:33:53Z. No independent second source is configured for this entry
  Last successful check: 2026-11-12T11:33:53Z
  Last attempt: 2026-11-12T11:33:53Z

Notes and limitations:
  "Latest version" is the newest stable version in the registry; pre-releases are excluded.

Change log:
  Time | Event | Change | Source
  2026-11-12T11:23:42Z | added | Entry created | —
  Changes for this entry as a feed: https://latestn.com/version/fastify/latest

Challenge this entry:
  Open challenges: None
  How: If a value here is wrong or out of date, send what is wrong and a link to evidence. Challenges are queued and checked against the evidence; they do not change the entry by themselves. If the entry changes as a result, the change log says so.
  Form: https://latestn.com/dispute/version/fastify
  POST: https://latestn.com/dispute/version/fastify with claim, evidence_url, and optionally field and contact (form-encoded or JSON)
  GET: https://latestn.com/dispute/version/fastify?claim={what is wrong}&evidence_url={link}

How to cite:
    latestN. (2026). What is the latest version of Fastify? Revision 1, last verified 2026-11-12T11:33:53Z. https://latestn.com/version/fastify (accessed 2026-11-12T12:50:57Z).

    @misc{latestN_version_fastify_r1,
      title        = {What is the latest version of Fastify?},
      author       = {{latestN}},
      year         = {2026},
      howpublished = {\url{https://latestn.com/version/fastify}},
      note         = {Revision 1; digest sha256:c08ff49f9e7e5b17; last verified 2026-11-12T11:33:53Z; accessed 2026-11-12T12:50:57Z}
    }

URL: https://latestn.com/version/fastify