September 2026 Release Checklist

This issue is to track tasks related to the September 2026 spec release:

* [ ] Merge any last-minute spec changes
* [x] https://github.com/KhronosGroup/OpenCL-Docs/pull/1539
* [x] https://github.com/KhronosGroup/OpenCL-Docs/pull/1611
* [x] https://github.com/KhronosGroup/OpenCL-Docs/pull/1613
* [x] ~~https://github.com/KhronosGroup/OpenCL-Docs/pull/1616~~ not this release
* [x] https://github.com/KhronosGroup/OpenCL-Docs/pull/1617
* [x] https://github.com/KhronosGroup/OpenCL-Docs/pull/1620
* [x] Update OpenCL-Headers
* [x] ~~https://github.com/KhronosGroup/OpenCL-Headers/issues/194~~ not this release
* [x] Update OpenCL ICD Loader - no further changes
* [x] Update OpenCL C++ bindings - no further changes
* [x] Merge any last-minute OpenCL-SDK fixes - no further changes
* [ ] Update OpenCL-SDK submodules and project version
* [x] Tag the spec sources - https://github.com/KhronosGroup/OpenCL-Docs/releases/tag/v3.1.2
* [x] Build the specs and create an OpenCL-Registry PR to publish them - https://github.com/KhronosGroup/OpenCL-Registry/pull/186
* [x] ~~Check that all new extensions have been added to the registry HTML~~ no new extensions this release
* [x] Check that all links work as expected
* [x] Build the reference pages and create an OpenCL-Registry PR to publish them - https://github.com/KhronosGroup/OpenCL-Registry/pull/186
* [x] Check that all links work as expected
* [ ] [Tag and release](https://docs.github.com/en/github/administering-a-repository/releasing-projects-on-github/managing-releases-in-a-repository#creating-a-release) ecosystem repos:
* [ ] OpenCL-Headers
* [ ] OpenCL-ICD-Loader
* [ ] OpenCL-CLHPP
* [ ] OpenCL-SDK
* [x] CTS Issues/PRs for new features
* [x] https://github.com/KhronosGroup/OpenCL-CTS/pull/2803
* [x] Coordinate announcements

Review the remaining unchecked checklist items: update OpenCL-SDK submodules and its project version, then tag and release OpenCL-Headers, OpenCL-ICD-Loader, OpenCL-CLHPP, and OpenCL-SDK. Start with the linked GitHub release documentation and the existing release checklist; done means all remaining tasks are completed and recorded here.

Written by the indexing model from the issue text.