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50ec53d0e7
- Add comprehensive test suite covering all Claude Explain functionality: - Basic pane opening and consent flow - no-ai directive detection - API interactions and error handling - Options/customization features - Caching behavior and persistence - Compilation state handling - State persistence across page loads - Fix caching bug in explain-view.ts: - Cache was incorrectly implemented as instance variable, losing cached explanations when panes were closed/reopened - Made cache static to persist across all pane instances (matches consent persistence pattern) - Fixes failing "Caching and reload" Cypress test - Aligns implementation with documented behavior: "shared across all explain views in the session" - Add test utilities and helpers: - Monaco editor content manipulation using clipboard events - Claude Explain specific helpers moved to test file - General utilities remain in utils.ts - Performance optimizations: - Clear Cypress intercepts in afterEach to prevent O(n²) degradation - Use :visible selectors to avoid GoldenLayout template elements - Proper mock setup timing to prevent race conditions - Add comprehensive README with lessons learned and best practices All tests use fake test data (test_first, focus_a, etc.) to clearly distinguish from production values and prevent accidental API calls.