switch to npm for ci

Author: Kylejeong2

.github/workflows/ci.yml

@@ -19,24 +19,19 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '18'
-          cache: 'pnpm'
-          
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: 8
+          cache: 'npm'
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: npm ci
 
       - name: Run linting
-        run: pnpm lint
+        run: npm run lint
 
       - name: Check formatting
-        run: pnpm prettier:check
+        run: npm run prettier:check
 
       - name: Build project
-        run: pnpm build
+        run: npm run build
 
       - name: Run evaluation tests
         env:
@@ -45,4 +40,4 @@ jobs:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
         run: |
-          pnpm test
+          npm test