cmux-runner-hook: a locked console skips the frame-pacing bench instead of failing it

[teamleaderleo]

Summary

When the console session is locked, the cmux-next frame-pacing bench job (cmux#16511) is now admitted and skips its console steps, where it used to be refused and fail.

• The bench runs on the side-lane mini or nowhere and has no rescue workflow. So since cmux-runner-hook: classify cmux-next frame-pacing's build and bench #1383 made it gui-step, admission's console refusal turned a locked mini into a red nightly.
• The new CONSOLE_SKIPPERS set (("cmux-next-frame-pacing.yml", "bench")) lists console jobs that skip their own console steps when take-gui gives way. On a locked console, job-started admits such a job as light, with no gui token, and logs why.
• Its take-gui --wait 900 step then gives way (exit 3, console: ... screen-locked). The workflow already maps that to taken=false and skips every console step with a notice, so the job ends green.
• Every other console job (app-host-unit-tests, tests-build-and-lag, test-e2e test, anything on --gui-runner) is still refused, so cmux's rescue re-runs it elsewhere.
• docs/CMUX_MINI_RUNNER.md and the hook docstring describe the exception.

The cmux workflow needs no change: its gui step already treats any take-gui exit other than 0 or 2 as a skip.

Red / green

python3 scripts/test-glaeda-cmux-runner.py HookTest.test_a_locked_console_leaves_the_frame_pacing_bench_to_skip_itself

• Red at e8f30e6:

  AssertionError: 1 != 0 : glaeda-cmux-runner-hook: refused: console: the console session (cmux) is screen-locked, ...
  

• Green at b3a17fc: Ran 1 test ... OK.

Locally, HookTest.test_a_locked_console_refuses_gui_jobs_before_taking_capacity, NoEmDashTest and ConsoleTest also pass. CI runs the full suite.

🤖 Generated with Claude Code

https://claude.ai/code/session_01RYQHfug1ZVQDp4eWgwVUtD

[teamleaderleo]

Subagent review at b3a17fc: APPROVE.

• Only (cmux-next-frame-pacing.yml, bench) is exempt. Every other console job is still refused.
• A light admission takes no gui token and no root, and take-gui re-checks the console and gives way (exit 3).
• The workflow maps any status other than 0 or 2 to a skip.

Nits, none blocking:

• take-gui can return 2 (no runner env) before its console check, so a broken runner on a locked console would count as taken.
• job_meta still records the bench as gui-step.
• No test covers a job named bench from another workflow.