# VEX Merge Explanations

## Module
Web

## Status
VERIFIED

## Description
Component that explains how VEX statements were merged and their impact on verdicts.

## Implementation Details
- **Feature directory**: `src/Web/StellaOps.Web/src/app/features/compare/components/vex-merge-explanation/`
- **Components**:
  - `vex-merge-explanation` (`src/Web/StellaOps.Web/src/app/features/compare/components/vex-merge-explanation/vex-merge-explanation.component.ts`)
- **Behavior coverage**:
  - `src/Web/StellaOps.Web/src/tests/compare/vex-merge-explanations.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-merge-explanations/run-001/`
- Date (UTC): 2026-02-11
- Tier 0: PASS (component/template/styles/spec paths and symbols verified).
- Tier 1: PASS (`npm run test` focused + regression include suite: 37 files / 169 tests; `npm run build` passed with baseline warnings).
- Tier 2: PASS (merge strategy/conflict rendering, deterministic source ordering and winner selection, and fallback semantics verified via Angular behavior harness).