Use native install script for Claude Code CLI in CI (#29)

Author: jbragg

.github/workflows/ci.yml

@@ -40,12 +40,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "20"
-
       - name: Install Claude Code CLI
-        run: npm install -g @anthropic-ai/claude-code
+        run: curl -fsSL https://claude.ai/install.sh | bash
 
       - name: Install uv
         uses: astral-sh/setup-uv@v4