Full rebuild October 2026 bump ros2-distro-mutex to 0.21.0 and build number to 27 and switch to new pinning mechanism

.github/workflows/testpr.yml

@@ -173,12 +173,9 @@ jobs:
     - name: Generate GitHub Actions workflows to catch post-PR problems
       shell: bash -l {0}
       run: |
-        extra_args=""
-        if [[ "${{ matrix.platform }}" == "win-64" || "${{ matrix.platform }}" == "linux-aarch64" ]]; then
-          # --batch_size 25 is a workaround for https://github.com/RoboStack/robostack.github.io/issues/105
-          extra_args="--batch_size 25"
-        fi
-        pixi run vinca-gha --platform ${{ matrix.platform }} --trigger-branch dummy_build_branch_as_it_is_unused -d ./recipes $extra_args
+        # --batch_size 25 is a workaround for https://github.com/RoboStack/robostack.github.io/issues/105
+        # and keeps the generated workflows below GitHub's 500 KiB limit on all platforms
+        pixi run vinca-gha --platform ${{ matrix.platform }} --trigger-branch dummy_build_branch_as_it_is_unused -d ./recipes --batch_size 25
 
     - name: Upload build cache as artifact
       # Keep artifacts consistent with the cache: retain partial output from failed or cancelled builds, but not skipped builds.

AGENTS.md

@@ -208,7 +208,7 @@ pixi run build
 ## Full rebuilds
 For full rebuilds also remember:
 - refresh snapshot: `pixi run create_snapshot`
-- update `conda_build_config.yaml` for active migrations. You can use https://github.com/conda-forge/conda-forge-pinning-feedstock/blob/main/recipe/conda_build_config.yaml as a base, and then also apply migrations that are mostly done; you can check the status at https://conda-forge.org/status/.
+- update pinning: `conda_build_config.yaml` is generated, do not edit it directly. Run `pixi run vinca-pinning-update --render` to move `vinca_pinning.yaml` to the latest conda-forge pinning and select migrations that are done for our dependencies, then put distro-specific pins under `pinning_overrides` and re-render with `pixi run vinca-pinning-render`.
 - bump `build_number`
 - bump mutex minor and update hardcoded mutex refs where needed
 - clear stale `pkg_additional_info.yaml` build-number overrides unless intentional