Revert "feat(ecc): prune plugin 43→12 items, promote 7 rules to .claude/rules/ (#245)"

This reverts commit 1bd68ff534.

.opencode/commands/e2e.md

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+---
+description: Generate and run E2E tests with Playwright
+agent: e2e-runner
+subtask: true
+---
+
+# E2E Command
+
+Generate and run end-to-end tests using Playwright: $ARGUMENTS
+
+## Your Task
+
+1. **Analyze user flow** to test
+2. **Create test journey** with Playwright
+3. **Run tests** and capture artifacts
+4. **Report results** with screenshots/videos
+
+## Test Structure
+
+```typescript
+import { test, expect } from '@playwright/test'
+
+test.describe('Feature: [Name]', () => {
+  test.beforeEach(async ({ page }) => {
+    // Setup: Navigate, authenticate, prepare state
+  })
+
+  test('should [expected behavior]', async ({ page }) => {
+    // Arrange: Set up test data
+
+    // Act: Perform user actions
+    await page.click('[data-testid="button"]')
+    await page.fill('[data-testid="input"]', 'value')
+
+    // Assert: Verify results
+    await expect(page.locator('[data-testid="result"]')).toBeVisible()
+  })
+
+  test.afterEach(async ({ page }, testInfo) => {
+    // Capture screenshot on failure
+    if (testInfo.status !== 'passed') {
+      await page.screenshot({ path: `test-results/${testInfo.title}.png` })
+    }
+  })
+})
+```
+
+## Best Practices
+
+### Selectors
+- Prefer `data-testid` attributes
+- Avoid CSS classes (they change)
+- Use semantic selectors (roles, labels)
+
+### Waits
+- Use Playwright's auto-waiting
+- Avoid `page.waitForTimeout()`
+- Use `expect().toBeVisible()` for assertions
+
+### Test Isolation
+- Each test should be independent
+- Clean up test data after
+- Don't rely on test order
+
+## Artifacts to Capture
+
+- Screenshots on failure
+- Videos for debugging
+- Trace files for detailed analysis
+- Network logs if relevant
+
+## Test Categories
+
+1. **Critical User Flows**
+   - Authentication (login, logout, signup)
+   - Core feature happy paths
+   - Payment/checkout flows
+
+2. **Edge Cases**
+   - Network failures
+   - Invalid inputs
+   - Session expiry
+
+3. **Cross-Browser**
+   - Chrome, Firefox, Safari
+   - Mobile viewports
+
+## Report Format
+
+```
+E2E Test Results
+================
+✅ Passed: X
+❌ Failed: Y
+⏭️ Skipped: Z
+
+Failed Tests:
+- test-name: Error message
+  Screenshot: path/to/screenshot.png
+  Video: path/to/video.webm
+```
+
+---
+
+**TIP**: Run with `--headed` flag for debugging: `npx playwright test --headed`