Contains verified esbuild configurations, WSL/code-insiders workflow requirements, and package.json contributes patterns for VS Code extension development that produce more correct results than reasoning from general training alone. This environment requires code-insiders (not code) for all CLI operations — the skill enforces this constraint and provides tested scaffolding, build scripts, and publish workflows that work under WSL. Covers TreeDataProvider, WebviewPanel/WebviewViewProvider with state persistence, FileSystemWatcher, StatusBarItem, command registration, menu when-clauses, activation events, esbuild bundling with problem-matcher plugin, @vscode/test-cli test runner, and vsce publishing. Consult when building a VS Code extension, scaffolding an extension project, implementing extension APIs (TreeView, Webview, sidebar panels, context menus, status bar), configuring package.json contribution points, setting up extension tests, bundling with esbuild, or publishing to the marketplace. Do NOT use for c
2026-03-19