Simplify CI setup and document gh usage

.github/workflows/ci.yml

@@ -18,7 +18,6 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: 'pnpm'
       - run: pnpm install --frozen-lockfile
       - run: pnpm --version
       - run: pnpm check

AGENTS.md

@@ -13,6 +13,7 @@
 - `pnpm dev`: Watches and incrementally rebuilds the library with TypeScript.
 - `pnpm clean`: Removes `dist/` so you can verify fresh builds.
 - `tmux new-session -- pnpm mcp:list`: Exercise the CLI in a resilient terminal; tmux makes it easy to spot stalls or hung servers.
+- `gh run watch`: Follow the latest GitHub Actions run logs (requires `gh auth login`); pair with `gh run view --log` when debugging CI.
 
 ## Coding Style & Naming Conventions
 - TypeScript files use 2-space indentation, modern ES module syntax, and `strict` compiler settings.