[teamleaderleo]

Blacksmith's 16-vCPU Linux label is queueing nightly-next's light controls 5-14 min tonight:

• run 41374257749: pick-nightly-sign-runner queued from 01:59:15Z;
• runs 41373656988 and 41372372224: route-visual-gate-nightly and the jobs after it.

pick-nightly-sign-runner is on the path to the feed: signing waits for it.

Change: on attempt 1 of a nightly-next run with vars.CI_NIGHTLY_ONLY_RUNNER == 'glaeda-nightly-only-m4pro', both jobs take the all-nightly reservation first. That is the same guarded first route decide, resolve-nightly-cmux-tui-client and find-nightly-next-recovery already use. Otherwise their old route runs.

• Both jobs only check out tooling, run Python and bash pickers, and mint the routing App token (GLAEDA_ROUTE_APP_KEY), which pick-nightly-build-runner already mints on these runners (same ci-routing-agent environment). No new secret goes to a new runner class.
• Both get portable-checks entries in .github/runners.json macos_jobs and leave BLACKSMITH_LINUX_ONLY_DEBT.
• The sign picker's last route is now the literal 'blacksmith-4vcpu-ubuntu-2404', which is what its fromJSON('[...]')[0] evaluated to. The routing-table guard requires a literal Blacksmith Linux fallback.

Performance

metric	before	after	delta	harness
pick-nightly-sign-runner queue	5-14 min on blacksmith-16vcpu-ubuntu-2404 (run 41374257749)	seconds on an idle reservation runner; measured on the first run after merge	up to -14 min	job timings

Tests: test_nightly_trusted_routing, test_ci_nightly_off_blacksmith, test_runner_routing_table, test_runner_label_policy and test_ci_linux_single_size pass.

Agent session: agent session

🤖 Generated with Claude Code

[github-actions]

cmux status _{(one comment, edited in place; each line is updated by the job that owns it)}

Review 5e75d95: HQ feed card · gallery before/after runs · checks

App of this head (app.zip, kept 1 day)

gh workflow run reload-build.yml -R manaflow-ai/cmux --ref feat-cmux-next -f tag=pr31642 -f ref=lane/nightly-pickers-reservation -f platform=macos -f backend_mode=local

Shipped in:

• cmux NEXT nightly 1.0.0-nightly.4138330546501 (b732874bf5)
• cmux NEXT nightly 1.0.0-nightly.4138511422301 (521667e619)
• cmux NEXT nightly 1.0.0-nightly.4138631602601 (86faa171ca)
• cmux NEXT nightly 1.0.0-nightly.4138723445501 (2429d60a67)

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/41376579738 at 765d3c4 failed: cmux-next fast tier (cargo), cmux-next fleet Release compile.
Those jobs last passed at 11cb039. This pull request is one of 2 merged since: #31642, #31462.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.

[blacksmith-sh]

Found 4 test failures on Blacksmith runners:

Failures

Test	View Logs
main.DeveloperIdAppTests.test_download_prints_the_active_profile_only/ test_download_prints_the_active_profile_only	View Logs
stubs: /System/Library/Frameworks/Security.framework/Versions/A/Security has no stub/ Security has no stub	View Logs
stubs: CoreFoundation.tbd: install-name /System/Library/Frameworks/ CoreFoundation.framework/Versions/A/CoreFoundation, missing 1: ['_CFRetain']/ CoreFoundation, missing 1: ['_CFRetain']	View Logs
stubs: CoreFoundation.tbd: install-name /System/Library/Frameworks/ CoreFoundation.framework/Versions/A/CoreFoundation, missing 1: ['_log2']/ CoreFoundation, missing 1: ['_log2']	View Logs

^{Need help on this PR? Tag @codesmith-bot with what you need.}

[teamleaderleo]

Review (subagent claude-opus-5-5 medium): SHIP at 5e75d95

The runs-on guard matches decide and falls through unchanged when it is false. Both jobs' steps are POSIX shell and standard-library Python, so they work on macOS. GLAEDA_ROUTE_APP_KEY already reaches this reservation through pick-nightly-build-runner, in the same environment. The routing tests and the tests around them pass.

Follow-ups (tracked in #31420):

• Three comments in pick-nightly-sign-runner and route-visual-gate-nightly still say Blacksmith-only. They should say the nightly-only reservation is tried first.
• When the sign picker runs on the reservation, it holds one of the idle runners the verify pick counts. That only makes the verify pick more conservative.