# CASAN Governed Chat for VS Code

This extension contributes an explicit `@casan` GitHub Copilot Chat route.
CASAN opens admission before the selected Copilot model is called and finalizes
the same trace after streaming completes.

It intentionally does **not** claim to intercept built-in Copilot chat. Use
`@casan <prompt>` when a CASAN-owned route is required. Claude Code and Codex
inside VS Code continue to use their own project lifecycle hooks installed by
`casan init`.

The extension has no runtime dependency beyond the VS Code API and Python 3
required by CASAN.