A Claude Code subagent that pulls the latest gallia platform changes and re-runs the installer. Runs in the background so the user can keep working while their container updates.

## What it does

1. Pulls the latest commits from `origin/main` in `~/gallia`
2. Handles stashing/unstashing local changes if needed
3. Re-runs `node ~/gallia/install.mjs --project ~/project`
4. Reports a 2-3 sentence summary of what changed (new skills, CLI version bumps, removed items)

## When to use

Deployed automatically by the `check-updates.sh` hook, which detects when gallia is behind `origin/main` (checked every 30 minutes). Also triggered when `install.mjs` changes on disk. Runs as a background agent — the user never needs to invoke it directly.

## Requirements

- `~/gallia` repo with GitHub remote access
- `node` on `$PATH`