rdmbair15m5-changelog-20260923-0042-rtty-pmtu-dashboard-and-alert-wiring

Wired PathMTUFragmentationAssessment to the RTTy dashboard interface row and PMTU inspector, and implemented quiet-by-default notifications once per network fingerprint with healthy hysteresis (FEAT-20260916-04).

Scope

• Hosts: rdmbair15m5, rdmsm4x
• Repos: apps/RTTy (git.ecs0.net:git/apps/RTTy.git, github.com/richhdoty/RTTy.git, rdmsm4x:~/dev/apps/RTTy)
• Tickets: FEAT-20260916-04 (Resolved)

Exact Files Touched

• Sources/RTTy/Stores/ObservationStore.swift:
  • Added @ObservationIgnored private(set) var notifiedPathMTUDegradedNetworkFingerprints: Set<String> = [].
  • Added computed properties pathMTUAssessment: PathMTUFragmentationAssessment? and func pathMTUAssessment(for targetID: UUID) -> PathMTUFragmentationAssessment?.
  • Added applyPathMTUAssessment logic to record .pathMTUResult events with assessment finding, set severity to .warning when degraded, alert once per network fingerprint, and clear fingerprint on healthy measurement (hysteresis).
  • Exposed applyPathMTUAssessmentForTesting(...).
  • Cleared notified fingerprints in resetState().
• Sources/RTTy/Services/LatencyNotificationService.swift:
  • Added deliverPathMTUAlert(target:interfaceName:assessment:soundEnabled:) with title, finding, first remedy, and structured userInfo.
• Sources/RTTy/Views/DashboardView.swift:
  • Inserted ("Path MTU", assessment.finding) in activeInterfaceValues.
  • Appended ("Assessment", assessment.finding) in pathMTUValues.
  • Rendered ordered remedies bullet list from assessment.remedies in pathMTUInspector.
• Sources/RTTy/Stores/ApplicationGraphProjections.swift:
  • Added optional bundleNameLookup: ((Int32) -> String?)? = nil parameter to makeBucket to isolate synthetic test PIDs from running host processes.
• Tests/RTTyTests/ApplicationFlowGroupingTests.swift:
  • Passed { _ in nil } for bundle lookup in synthetic test cases, eliminating host PID collision failures.
• Tests/RTTyTests/PathMTUAssessmentWiringTests.swift:
  • Added 5 unit tests verifying assessment derivation, deduplication, hysteresis, quiet defaults, and archive events.

Commands Run & Verification Evidence

• swift test --package-path /Users/richh/dev/apps/RTTy --filter PathMTUAssessmentWiringTests: 5/5 tests passed in 0.106s on rdmbair15m5.
• ssh rdmsm4x "swift test --package-path ~/dev/apps/RTTy --filter PathMTUAssessmentWiringTests": 5/5 tests passed in 0.090s on rdmsm4x.
• swift test --package-path /Users/richh/dev/apps/RTTy --filter ApplicationFlowGroupingTests: 17/17 tests passed in 0.005s.
• swift test --package-path /Users/richh/dev/apps/RTTy --filter StandardChannelSurfaceTruthTests: 11/11 tests passed in 0.030s.
• Git commit: fe09996 pushed to origin (git.ecs0.net:git/apps/RTTy.git) and backup (github.com/richhdoty/RTTy.git).
• Synced to canonical: rdmsm4x:~/dev/apps/RTTy fast-forward pulled cleanly to fe09996.
• Ticket: FEAT-20260916-04 commented and resolved on rdmsm4x.

Backup Locations & Undo

• Git commits can be reverted via git revert fe09996.
• Remote commits mirrored at git.ecs0.net and github.com.

Outstanding Owner Actions

• None.