ci: one desktop job per platform

[richiemcilroy]

Follow-up to #2553 and #2561. Each platform's desktop checks now run in one job, so a PR takes 1 macOS runner instead of up to 3.

Why

Hosted macOS concurrency is 5 runners. Each PR that touched recording code was holding 3 of them (Clippy, Build GPUI Desktop, A/V Sync Tests). Each of those jobs repeated checkout, native-deps setup and cache restore. This morning about 45 macOS jobs were queued behind 5 runners.

Changes

• Desktop (macOS, Windows, Linux) replaces Clippy, Rust tests (Linux), Build GPUI Desktop and the PR side of A/V Sync Tests. Steps run cheapest first:
  1. packaging script tests
  2. Clippy (macOS/Windows)
  3. root crate tests
  4. GPUI tests
  5. the A/V sync steps
• Steps are gated by the existing path filters. The rust filter gates Clippy and the root tests, and a new sync filter (the old sync-tests path list) gates the A/V sync steps. On main every step runs, so the one v1-rust-desktop cache per platform covers every step a PR can run.
• On Linux, cap-recording --lib and cap-enc-ffmpeg run once, not twice, when both filters match.
• The A/V sync steps are copied unchanged from sync-tests.yml, apart from the 6-case random matrix. sync-tests.yml keeps its nightly schedule (40 random cases) and manual dispatch, and drops its PR trigger.

Trade-offs

• Within a platform the steps now run in sequence instead of in parallel jobs. Each job pays checkout, setup and cache restore once instead of up to 3 times, and needs one runner slot instead of up to 3.

Verification

• actionlint clean on both workflows.
• Repo and org Actions cache limits raised from 10 GB to 50 GB, so the combined caches and the release caches both fit.

Confidence Score: 5/5

The PR appears safe to merge; the earlier skipped-check issue is fixed.

Summary

The PR combines desktop checks into one job per platform and keeps the larger nightly A/V test run separate.

• Desktop checks share one job on each platform.
• A/V sync checks run with desktop CI on pull requests.

_{Reviews (2) · Last reviewed commit: "ci: run the desktop job for recording ha..." · Reviewed by Greptile}

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Project	Deployment	Actions	Updated
cap-status	Ready	Preview	Oct 14, 2026 9:03am UTC

[capy-ai]

Capy found 1 potential issue (1 medium).

View 3 other findings in Capy.

[richiemcilroy]

hey @greptileai, please re-review the PR

[capy-ai]

Capy found no issues.