rdmsm4x - changelog - RTTy 524 HS-3 immediate-apply Settings - claude - TASK-20260926-06 - RTTy - 2026-09-26 05:10 EDT

RTTy's Settings window now applies every ordinary setting as it changes, with Undo (⌘Z) and per-tab "Restore Defaults"; Done/Apply/Revert are gone. On a lane branch only, not merged.

• Scope: rdmsm4x only. Worktree ~/dev/_scratch/rtty-524-hs3-immediate-apply-20260926, branch grok/524-hs3-immediate-apply, pushed to the backup remote only.
• Window: 2026-09-26 04:55:55 → 05:10 EDT.
• Commits: e305151 (feature), 9fc6475 (FEATURES.md 65→67), 2409291 (FEATURE_MATRIX).
• Files: Sources/RTTy/Support/RTTySettingsTransaction.swift, Sources/RTTy/Views/SettingsView.swift, Sources/RTTy/Views/UsageProfileSettingsSection.swift, Tests/RTTyTests/SettingsImmediateApplyTests.swift (new), SettingsWindowPresentationTests, RTTySettingsTransactionTests, SettingsControlParityTests, FeatureInventoryTests, FEATURES.md, FEATURE_MATRIX.md, docs/FEATURE_MATRIX.md.
• Verification (full native swift test --disable-swift-testing, rc 0):
  • RTTyTests 1343 (8 skipped, 0 failures), LatencyCore 426, PrivilegedCapture 71.
  • The negative control failed as intended.
  • The RTTyStandard unsigned build succeeded (rc 0).
• Undo: delete the branch from backup, or don't merge it. Nothing was installed or deployed.
• Open: installed-build visual acceptance, including ⌘Z in the running app; the Intel suite and full gate; the merge (lead).
• Handback: ~/dev/_handoff/rtty-524-friendly-default/hs3-immediate-apply-run-20260926/HANDBACK.md