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TinyFailureEvent / First Signal Event Pattern

Module

Web

Status

VERIFIED

Description

First signal event UI is implemented with a dedicated store, typed models, and card components that surface first-run signal status in run detail and console status views.

Implementation Details

  • Feature directory: src/Web/StellaOps.Web/src/app/features/runs/
  • Components:
    • first-signal-card (src/Web/StellaOps.Web/src/app/features/runs/components/first-signal-card/first-signal-card.component.ts)
    • Run detail integration (src/Web/StellaOps.Web/src/app/features/release-jobengine/runs/pipeline-run-detail.component.ts)
    • Console status integration (src/Web/StellaOps.Web/src/app/features/console/console-status.component.html)
  • Services:
    • first-signal-prefetch (src/Web/StellaOps.Web/src/app/features/runs/services/first-signal-prefetch.service.ts)
    • first-signal.store (src/Web/StellaOps.Web/src/app/core/api/first-signal.store.ts)
  • Behavior coverage:
    • src/Web/StellaOps.Web/src/tests/runs/firstsignalcard-component.component.spec.ts
  • Source: Feature matrix scan (naming normalized during QA verification)

E2E Test Plan

  • Setup:
    • Log in with a user that has appropriate permissions
    • Navigate to pipeline run detail or console status views
    • Ensure run data exists with first-signal snapshots/events
  • Core verification:
    • Verify first-signal card renders deterministic state and metadata for a signal event
    • Verify telemetry hooks emit TTFS start/render events with stable payload fields
    • Verify retry interaction reissues first-signal load request
  • Edge cases:
    • Verify graceful handling when backend API is unavailable (error/offline states)
    • Verify fallback when first signal is unavailable yet response metadata exists
    • Verify accessibility semantics (role, aria-live, busy/error states)

Verification

  • Run ID: docs/qa/feature-checks/runs/web/tinyfailureevent-first-signal-event-pattern/run-001/
  • Date (UTC): 2026-02-11
  • Tier 0: PASS (source/symbol verification for first-signal card/store/prefetch plus run-detail and console integrations).
  • Tier 1: PASS (npm run test focused suite: 19 files / 94 tests; npm run build passed with known baseline warnings).
  • Tier 2: PASS (behavioral verification of TTFS telemetry emission, retry path behavior, user-surface integrations, and removal of deprecated allowSignalWrites usage).