uyota 匠の一手

Initial release schedule announcement

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15 January 2026

Release Engineers send announcement email to developers with a rough schedule.

Release schedule reminder

3 April 2026

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Release Engineers send reminder announcement e-mail to developers with updated schedule.

Code slush begins

17 April 2026

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Release Engineers announce that all further commits to the stable/15 branch will not require explicit approval, however new features should be avoided.

releng/15.1 branch

1 May 2026

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releng/15.1 branch created; future release engineering proceeds on this branch.

BETA1 builds begin

1 May 2026

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First beta test snapshot.

BETA2 builds begin

8 May 2026

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Second beta test snapshot.

BETA3 builds begin

15 May 2026

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Third beta test snapshot.

RC1 builds begin

22 May 2026

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First release candidate.

RELEASE builds begin

29 May 2026

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15.1-RELEASE builds begin.

RELEASE announcement

2 June 2026

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15.1-RELEASE press release.

15.0 EoL

30 September 2026

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15.0-RELEASE no longer supported.

15.1 EoL

31 March 2027

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15.1-RELEASE no longer supported.

stable/15 EoL

31 December 2029

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stable/15 no longer supported.