activation

VS Code loads the extension host entry at main.ts when an activation event in package.json matches.
The exported `activate(context)` function is the single activation entry point for vscode_extension.
Install-time and first-run sequencing across extension vs base layers: installation_sequencing.
Startup failure diagnosis, first-paint sequencing, bundle splitting, and development-host lessons: startup-performance.rq.

Interactive page: activation