The failover runbook, the node-compatibility note, the native-Windows note,
and the serial-reference note record the third variable value's scope and
exclusions (bilingual, pairing re-recorded); a new implemented process note
owns the value's participating set, the dormant-by-default canary posture,
and the walker-fix rationale. .github/AGENTS.md points at both notes.
The per-platform failover repository variables (DSH_CI_FAILOVER_LINUX and
DSH_CI_FAILOVER_WINDOWS) accept a third value alongside the existing
selfhosted routing. Set by a repository writer, the value retargets the
always-on pull-request and master lanes onto the matching hosted-runner
labels (16-core pools map to the 16-vCPU tier, standard legs to 4-vCPU);
unset or any other value keeps today's runners, so the leg is dormant until
a writer opts in - a canary path for capacity fallback, never the default.
Participating jobs: the three enterprise Linux workers, the node-compat
legs, the four Windows lanes, and the all-checks-passed verdict in ci.yml;
expected-filenames; the sandbox bwrap leg; and the two manual benchmark
matrices (4-32 vCPU tiers map to equivalents; 64/96-core rows keep the
fleet labels). Everything pinned to its own runner by spec, credential, or
host capability keeps it under every value, and the release-shaped chains
stay entirely hosted. request-review.yml was retired on master while this
work was in flight and the branch takes the deletion.
Specs pin the new branches: ci-workflow.spec.ts asserts the labels appear
in the extended selectors, and ci-compatible-selfhosted.spec.ts evaluates
the routing mode.
Master's windows-python-console-spawn-wait fix removed the plugin-add flake
this branch previously retried, so that retry is dropped entirely; the
branch keeps the changes that remain useful.
- Retry the immutable install step up to three attempts total with a
ten-second pause (bash on every platform): node-gyp's Node-header
download from nodejs.org intermittently times out, as observed on the
hosted node24-macos-x64 cell.
- Keep checkout credentials out of the build tree (persist-credentials:
false) so dependency-install scripts cannot read the embedded token.
- Failover runbook: drop the stray leading '#' before the Dependabot
paragraph on both sides.
- Hosted-runtime note: name the PR/commit ownership and UTC timestamps of
the cited runs and record the constraints a future self-hosted attempt
must satisfy; new note records the install retry decision.
Windows x64 runtime builds resolve their hosted matrix.runner unconditionally
again (windows-2025 for pull-request CI). Remove the DSH_CI_FAILOVER_WINDOWS
selector, job-private Python toolchain, self-hosted dependency install and
post-step cleanup, the private setup script, and the routing spec introduced
in #3629. The Windows failover switch again covers only the native Windows
jobs in ci.yml.
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