generated: '2026-07-21'
method: searched
source: https://github.com/urbit/vere/releases + https://github.com/urbit/urbit/releases
description: >-
  Urbit publishes dated releases on GitHub across two tracks. The runtime
  (Vere) uses conventional semver-style tags (vere-vX.Y) on urbit/vere; the
  kernel (Arvo/Hoon) uses Kelvin versioning on urbit/urbit — versions count
  DOWN toward absolute zero (currently 408k, decremented from 409k), with
  release-candidate and patch suffixes (408k-rc1, 408k-1). Recent window
  captured from the GitHub releases API at generation time.
scheme:
  runtime: semver-ish vere-vX.Y tags on urbit/vere
  kernel: Kelvin versioning (counts down; e.g. [%zuse 410] -> 409k -> 408k) on urbit/urbit
current:
  runtime: vere-v4.6
  kernel: 408k-1
entries:
  - version: 408k-1
    date: '2026-07-15'
    track: kernel
    url: https://github.com/urbit/urbit/releases/tag/408k-1
  - version: 408k
    date: '2026-07-13'
    track: kernel
    notes: Kelvin decrement from 409k; migration workflow published in urbit.org's urbit-development agent skill (kelvin-migrations references).
    url: https://github.com/urbit/urbit/releases/tag/408k
  - version: vere-v4.6
    date: '2026-07-03'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.6
  - version: vere-v4.5
    date: '2026-06-19'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.5
  - version: vere-v4.4
    date: '2026-06-16'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.4
  - version: 408k-rc2
    date: '2026-06-12'
    track: kernel
    url: https://github.com/urbit/urbit/releases/tag/408k-rc2
  - version: 408k-rc1
    date: '2026-04-28'
    track: kernel
    url: https://github.com/urbit/urbit/releases/tag/408k-rc1
  - version: 409k-2
    date: '2026-03-02'
    track: kernel
    url: https://github.com/urbit/urbit/releases/tag/409k-2
  - version: vere-v4.3
    date: '2026-02-18'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.3
  - version: vere-v4.2
    date: '2026-01-22'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.2
  - version: vere-v4.1
    date: '2026-01-20'
    track: runtime
    url: https://github.com/urbit/vere/releases/tag/vere-v4.1