# VEX History Tracking

## Module
Web

## Status
VERIFIED

## Description
VEX decision history component showing the timeline of VEX decisions for each vulnerability.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/triage/components/vex-history/`
- **Components**:
  - `vex-history` (`src/Web/StellaOps.Web/src/app/features/triage/components/vex-history/vex-history.component.ts`)
- **Behavior coverage**:
  - `src/Web/StellaOps.Web/src/tests/triage/vex-history-tracking.behavior.spec.ts`
- **Source**: Feature matrix scan

## E2E Test Plan
- **Setup**:
  - [ ] Log in with a user that has appropriate permissions
  - [ ] Navigate to the relevant page/section where this feature appears
  - [ ] Ensure test data exists (scanned artifacts, SBOM data, or seed data as needed)
- **Core verification**:
  - [ ] Verify the component renders correctly with sample data
  - [ ] Verify interactive elements respond to user input
  - [ ] Verify data is fetched and displayed from the correct API endpoints
- **Edge cases**:
  - [ ] Verify graceful handling when backend API is unavailable (error state)
  - [ ] Verify responsive layout at different viewport sizes
  - [ ] Verify accessibility (keyboard navigation, screen reader labels, ARIA attributes)

## Verification
- Run ID: `docs/qa/feature-checks/runs/web/vex-history-tracking/run-001/`
- Date (UTC): 2026-02-11
- Tier 0: PASS (component/service/spec paths and symbols verified; dossier path note captured for inline-template implementation).
- Tier 1: PASS (`npm run test` focused + regression include suite: 36 files / 165 tests; `npm run build` passed with baseline warnings).
- Tier 2: PASS (history loading, deterministic timeline ordering, supersede-chain metadata, retry/error handling, and defensive scope behavior verified via Angular behavior harness).