# Task Brief: Implement Playwright E2E Tests for LinkdingSync

## Context
LinkdingSync is a Firefox browser extension that synchronizes bookmarks with a self-hosted Linkding instance. Current state: Basic functionality exists but lacks comprehensive E2E test coverage for bookmark sync operations.

## Goal
Implement comprehensive Playwright E2E tests to increase test coverage and ensure bookmark sync reliability.

## Acceptance Criteria
- [ ] Tests pass for happy path (bookmark creation, sync to Linkding)
- [ ] Tests fail appropriately for invalid API responses
- [ ] Tests run under 5 minutes (Firefox primary)
- [ ] Coverage increases by at least 50%
- [ ] Tests include proper setup/teardown (browser launch, API authentication)
- [ ] Tests cover: bookmark creation, API sync, conflict resolution, folder structure, auto-tag generation

## Constraints
- Don't modify core extension logic (manifest.json, main sync logic)
- Use existing API patterns (token authentication)
- Keep tests focused on UI automation, not unit logic
- Tests must work in headless mode for CI

## Related Files
- `@LinkdingSync\popup.html` - UI for bookmark entry
- `@LinkdingSync\background.js` - Service worker
- `@LinkdingSync\utils\sync.js` - Sync logic
- `@LinkdingSync\manifest.json` - Extension config
- `@LinkdingSync\playwright.config.ts` - Test configuration

## Time Estimate
45-60 minutes for initial test implementation

## Checkpoints
- 50%: Initial test structure created, first tests passing
- 90%: Most tests implemented, iterating on fixes

## Chatlog Reference
- Session log: `@LinkdingSync\chatlog.md`