Build perf Phase 1: bound CARGO_BUILD_JOBS, move provenance off GitHub-hosted#17
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Build perf Phase 1: bound CARGO_BUILD_JOBS, move provenance off GitHub-hosted#17
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…fs paiml/infra#PMAT-156) Build-performance spec Phase 1 (YAML-only, safe changes): - Add CARGO_BUILD_JOBS=4 default to top-level env. Prevents cargo oversubscription when many runners share a host. Spec: build-performance.md §4.1 (runners × jobs ≤ 1.2 × ncores). - Migrate provenance job from ubuntu-latest to [self-hosted, clean-room]. Spec principle §3.8: no GitHub-hosted runners. Follow-ups (not in this PR): lint/test/build label splitting (§7.2), nextest migration (Phase 2).
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Summary
Build-performance spec Phase 1 (YAML-only, low-risk). Spec:
infra/docs/specifications/build-performance.md.CARGO_BUILD_JOBS: "4"default to top-levelenv:so cargo doesn't oversubscribe when many runners share a host. Derived from §4.1:runners × CARGO_BUILD_JOBS ≤ 1.2 × ncores.provenancejob fromubuntu-latestto[self-hosted, clean-room]. No GitHub-hosted runners in the sovereign stack.Out of scope (follow-up PRs)
Test plan
gatecheck passes on this PRclean-room-labeled runner