add some additional notes

Author: dibarbet

.github/copilot-instructions.md

@@ -21,11 +21,27 @@
 - **Debugging**: See `docs/debugger/` for advanced .NET debugging, including runtime and external library debugging.
 - **Roslyn Copilot Language Server**: To update/test, see instructions in `CONTRIBUTING.md` (triggers pipeline, checks logs for install, etc.)
 
+## Infrastructure Tasks
+- **Tasks Directory**: Build automation is in `tasks/` using Gulp. Key modules:
+  - `testTasks.ts`: Test orchestration for unit/integration tests across components
+  - `offlinePackagingTasks.ts`: VSIX packaging for different platforms (`vsix:release:package:*`)
+  - `componentUpdateTasks.ts`: Automated updates for Roslyn Copilot components
+  - `snapTasks.ts`: Version bumping and changelog management for releases
+  - `gitTasks.ts`: Git operations for automated PR creation and branch management
+- **Adding New Tasks**: Create `.ts` file in `tasks/`, define `gulp.task()` functions, require in `gulpfile.ts`
+- **Task Patterns**: Use `projectPaths.ts` for consistent path references, follow existing naming conventions (`test:integration:*`, `vsix:*`, etc.)
+
 ## Project Conventions & Patterns
 - **TypeScript**: Follows strict linting (`.eslintrc.js`), including header/license blocks and camelCase filenames (except for interfaces and special files).
 - **Component Downloads**: Language servers and debuggers are downloaded at runtime; see `package.json` for URLs and install logic.
 - **Copilot Providers**: Use `registerCopilotContextProviders` and `registerCopilotRelatedFilesProvider` to extend Copilot context for C#.
-- **Testing**: Tests are in `test/` and use Jest. Some grammars and language configs are embedded for Razor and XAML.
+- **Testing**: Prefer integration tests over unit tests for features. Structure follows:
+  - `test/lsptoolshost/integrationTests/` for Roslyn/LSP features
+  - `test/omnisharp/omnisharpIntegrationTests/` for OmniSharp features  
+  - `test/razor/razorIntegrationTests/` for Razor features
+  - Use `test/*/integrationTests/integrationHelpers.ts` for test setup utilities
+  - Tests use Jest with VS Code test environment and require workspace test assets
+  - Run with `npm run test:integration:*` commands (e.g., `npm run test:integration:csharp`)
 
 ## Integration Points
 - **GitHub Copilot**: Extension registers C# context and related files providers if Copilot/Copilot Chat extensions are present.