diff --git a/.github/skills/test-e2e-playwright-coverage-scripts/run.sh b/.github/skills/test-e2e-playwright-coverage-scripts/run.sh
index 8d52eaea..39d7b8e0 100755
--- a/.github/skills/test-e2e-playwright-coverage-scripts/run.sh
+++ b/.github/skills/test-e2e-playwright-coverage-scripts/run.sh
@@ -247,7 +247,7 @@ main() {
     log_info "Coverage output: ${PROJECT_ROOT}/coverage/e2e/"
     log_info ""
     log_info "Coverage architecture:"
-    log_info "  Tests → Vite (localhost:3000) → serves source files"
+    log_info "  Tests → Vite (localhost:${VITE_PORT}) → serves source files"
     log_info "  Vite → Docker (localhost:8080) → API proxy"
 
     # Execute Playwright tests with coverage
diff --git a/docs/plans/playwright-coverage-fix.md b/docs/plans/playwright-coverage-fix.md
new file mode 100644
index 00000000..5f071a45
--- /dev/null
+++ b/docs/plans/playwright-coverage-fix.md
@@ -0,0 +1,156 @@
+# Playwright Coverage Fix Plan
+
+**Date:** January 21, 2026
+**Status:** Ready for Implementation
+**Priority:** Critical
+**Issue:** Playwright E2E coverage is calculating as "unknown %" with empty coverage files
+
+---
+
+## Root Cause Analysis
+
+### Problem Statement
+The Playwright coverage reports are empty:
+- `coverage/e2e/coverage.json` contains only `{}`
+- `coverage/e2e/lcov.info` is empty (0 bytes)
+
+### Root Cause
+The `@bgotink/playwright-coverage` package uses **V8 coverage** to track code execution. V8 coverage works by:
+1. Instrumenting JavaScript at the V8 engine level
+2. Tracking which source lines are executed
+3. Mapping executed code back to original source files
+
+**The issue:** When tests run against the Docker container (`localhost:8080`), they're hitting **pre-bundled/minified code** from the production build. V8 coverage cannot map this back to source files because:
+- Source maps may not be available in the Docker container
+- The bundled code structure differs from the source structure
+- File paths don't match the `sourceRoot` in the coverage config
+
+**The fix:** Tests must run against the **Vite dev server** (`localhost:3000`) which:
+- Serves source files directly (ESM modules)
+- Provides inline source maps
+- Allows V8 to map execution back to original TypeScript/TSX files
+
+### Secondary Issue: Port Mismatch
+- Vite config specifies `port: 3000`
+- Coverage script uses `VITE_PORT=5173` (default)
+- This causes the script to wait for a server on the wrong port
+
+---
+
+## Implementation Plan
+
+### Phase 1: Fix Port Configuration
+
+**File:** `frontend/vite.config.ts`
+**Change:** Update port to 5173 (Vite default, matches coverage script)
+
+```typescript
+server: {
+  port: 5173,  // Changed from 3000 to match coverage script
+  proxy: {
+    '/api': {
+      target: 'http://localhost:8080',
+      changeOrigin: true
+    }
+  }
+}
+```
+
+### Phase 2: Update Coverage Script Output
+
+**File:** `.github/skills/test-e2e-playwright-coverage-scripts/run.sh`
+**Changes:**
+1. Fix the hardcoded port 3000 reference in logging
+2. Add coverage summary extraction and display
+3. Add threshold enforcement (85% minimum)
+
+### Phase 3: Add Coverage Threshold Validation
+
+**File:** `playwright.config.js`
+**Add:** Coverage thresholds in the reporter config
+
+```javascript
+const coverageReporterConfig = defineCoverageReporterConfig({
+  // ... existing config ...
+
+  // Add threshold enforcement
+  check: {
+    global: {
+      statements: 85,
+      branches: 85,
+      functions: 85,
+      lines: 85,
+    },
+  },
+});
+```
+
+### Phase 4: CI Workflow Update
+
+**File:** `.github/workflows/e2e-tests.yml` (if exists)
+**Add:** Coverage upload to Codecov with e2e flag
+
+---
+
+## Files to Modify
+
+| File | Change Type | Description |
+|------|-------------|-------------|
+| `frontend/vite.config.ts` | UPDATE | Change port from 3000 to 5173 |
+| `.github/skills/test-e2e-playwright-coverage-scripts/run.sh` | UPDATE | Fix port logging, add coverage summary |
+| `playwright.config.js` | UPDATE | Add coverage thresholds (85%) |
+| `docs/plans/chores.md` | UPDATE | Mark task as complete |
+
+---
+
+## Testing the Fix
+
+### Manual Verification Steps
+1. Start Docker backend: `docker compose -f .docker/compose/docker-compose.local.yml up -d`
+2. Run coverage skill: `.github/skills/scripts/skill-runner.sh test-e2e-playwright-coverage`
+3. Verify output shows:
+   - Vite starting on port 5173
+   - Tests passing
+   - Coverage percentage displayed (not "unknown")
+   - `coverage/e2e/lcov.info` contains data
+   - `coverage/e2e/coverage.json` contains coverage metrics
+
+### Expected Output
+```
+✅ Coverage Summary:
+  Statements: XX%
+  Branches: XX%
+  Functions: XX%
+  Lines: XX%
+```
+
+---
+
+## Definition of Done
+
+- [ ] Vite dev server starts on port 5173
+- [ ] Coverage script successfully collects V8 coverage data
+- [ ] `coverage/e2e/lcov.info` contains valid LCOV data
+- [ ] `coverage/e2e/coverage.json` contains coverage metrics with percentages
+- [ ] Coverage summary displays actual percentages (not "unknown")
+- [ ] 85% coverage threshold enforced for local and CI
+- [ ] All existing E2E tests pass
+
+---
+
+## Risk Assessment
+
+| Risk | Likelihood | Impact | Mitigation |
+|------|------------|--------|------------|
+| Vite port change breaks other tooling | Low | Medium | Port 5173 is Vite default, less conflict |
+| Coverage collection slows tests | Low | Low | V8 coverage has minimal overhead |
+| Source map resolution issues | Medium | High | Test with multiple file types |
+
+---
+
+## Notes
+
+The `@bgotink/playwright-coverage` package documentation explicitly states:
+> **"Coverage is empty"**: Did you perhaps use `@playwright/test`'s own `test` function? If you don't use a `test` function created using `mixinCoverage`, coverage won't be tracked.
+
+Our tests correctly import from `@bgotink/playwright-coverage`, so the issue is definitely the source file resolution, not the test setup.
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 90a219be..50012d82 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -5,7 +5,7 @@ import react from '@vitejs/plugin-react'
 export default defineConfig({
   plugins: [react()],
   server: {
-    port: 3000,
+    port: 5173,
     proxy: {
       '/api': {
         target: 'http://localhost:8080',
diff --git a/playwright.config.js b/playwright.config.js
index 40c8403e..68e2a7f4 100644
--- a/playwright.config.js
+++ b/playwright.config.js
@@ -62,6 +62,16 @@ const coverageReporterConfig = defineCoverageReporterConfig({
     lines: [50, 80],
   },
 
+  // Coverage threshold enforcement
+  check: {
+    global: {
+      statements: 85,
+      branches: 85,
+      functions: 85,
+      lines: 85,
+    },
+  },
+
   // Path rewriting for source file resolution
   rewritePath: ({ absolutePath, relativePath }) => {
     // Handle paths from Docker container