vscode-extensions

name	vscode-extensions
description	Guide for developing VS Code extensions. Use this when creating or modifying extension code, webviews, tree views, or commands.

VS Code Extension Development

Extension structure

• extension.ts — activation point, register commands and views
• package.json — contributes commands, views, configuration
• Webviews use message passing (postMessage / onDidReceiveMessage)

Webview security

• Use webview.asWebviewUri() for local resources
• Set a restrictive Content-Security-Policy
• Bundle dependencies locally, never load from CDN

Testing

• Use @vscode/test-electron for integration tests
• Unit test pure logic separately with vitest