rdmpw3275m-changelog-20260922-2338-cascade-lake-tuned-bottle-builder

One-line summary: Implemented Cascade Lake tuned Homebrew bottle builder in updateRoo (FEAT-20260901-46) with hardware eligibility validation, language discrimination, auto-postinstall, pinning, and bottle provenance extraction; closed parent EPIC-20260901-04 with 100% child milestone completion.

Scope

• Hosts affected: rdmpw3275m (Intel Xeon W-3275M 28c/56t builder), rdmpw3265m (Intel Xeon W-3265M 24c/48t peer consumer), rdmsm4x (Apple Silicon M4 Max hub).
• Projects affected: apps/updateRoo (UpdateRooCore, UpdateRooTests).
• Tickets affected: FEAT-20260901-46 (RESOLVED), EPIC-20260901-04 (RESOLVED), ISSUE-20260902-16 (RESOLVED), TASK-20260903-36 (CHECKPOINTED).

Exact Files Touched

1. apps/updateRoo/Sources/UpdateRooCore/Recompile/CascadeLakeBottleBuilder.swift:
   • Actor CascadeLakeBottleBuilder orchestrating host-targeted Cascade Lake bottle builds.
   • Hardware validation via ECSSystem.CPUInfo ensuring AVX-512 VNNI vector capabilities; politely refuses Apple Silicon.
   • Language discrimination refusing Rust/Go formulae where -march does not reach codegen.
   • Delegation to fleet/homebrew-intel/brew-intel-bottle.zsh with direct Homebrew CLI fallback sequence (brew install --build-bottle --bottle-arch=cascadelake -> brew postinstall -> brew pin -> brew bottle --json).
   • Provenance extraction parsing bottle tarball paths, SHA256 checksums, and -march=cascadelake compiler counts.
2. apps/updateRoo/Tests/UpdateRooTests/CascadeLakeBottleBuilderTests.swift:
   • 7 unit tests covering Apple Silicon refusal, non-VNNI Intel refusal, Rust formula refusal, Go formula refusal, Cascade Lake C formula eligibility, dry-run simulation via MockProcessRunner, and live sequence fallback.
3. Ticket store:
   • FEAT-20260901-46 moved to issues/resolved/ with test and commit evidence.
   • EPIC-20260901-04 moved to issues/resolved/ with all 5 child milestones verified.
4. Fleet mail:
   • Broadcast 20260922-233732-970FEA3D announced to all.

Verification Evidence

• Homebrew 6 Bottle Emission Verification: Verified on rdmpw3275m with brew bottle --json blake3, generating blake3--1.8.7.tahoe.bottle.1.tar.gz (rebuild 1, sha256 359222e5e961abee23af507d32ac89ee68d3ae4b557263eda128b052319d16c7).
• CascadeLakeBottleBuilderTests: 7/7 tests passed on rdmsm4x.
• Full updateRoo Regression Suite: 346/346 tests passed (0 failures) in 119.5 seconds on rdmsm4x.
• Git Commits & Remotes: Commit 14c4d60 pushed cleanly to both fleet (git.ecs0.net:git/apps/updateRoo.git) and backup (https://github.com/richhdoty/rdmsm4x-dev-apps-updateroo.git).

How to Undo

• Revert commit 14c4d60 in apps/updateRoo: git revert 14c4d60 and push to remotes.
• Reopen FEAT-20260901-46 and EPIC-20260901-04 if necessary: ticket reopen FEAT-20260901-46.