Add Pi Research Agent package

Autonomous research agent with web search, source analysis, and report synthesis.
Built on Pi agent core. Available as CLI, programmatic API, and MCP server.

Features:
- 4 built-in tools: web_search, read_url, save_note, synthesize_report
- CLI with TUI and print modes
- Programmatic API via ResearchAgent class
- MCP server with 3 tools: research, quick_search, read_url
- Skills system for custom research behavior
- Automatic .env file loading for API keys
- Configurable max turns, output formats (markdown/JSON/bullet)
- Automatic report saving to research-output/

.github/workflows/ci.yml

@@ -6,37 +6,55 @@ on:
   pull_request:
     branches: [main]
 
-concurrency:
-  group: ci-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
-  build-check-test:
+  lint:
+    name: Lint & Type Check
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 22
-          cache: npm
-
-      - name: Install system dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev fd-find ripgrep
-          sudo ln -s $(which fdfind) /usr/local/bin/fd
+          node-version: "22.19"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm ci --ignore-scripts
 
-      - name: Build
-        run: npm run build
+      - name: Build dependencies
+        run: |
+          npm run build --workspace=@earendil-works/pi-ai
+          npm run build --workspace=@earendil-works/pi-tui
+          npm run build --workspace=@earendil-works/pi-agent-core
 
-      - name: Check
-        run: npm run check
+      - name: Build research-agent
+        run: npm run build --workspace=@earendil-works/pi-research-agent
 
-      - name: Test
-        run: npm test
+      - name: Run biome check
+        run: npx biome check packages/research-agent/src/
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    needs: lint
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22.19"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Build dependencies
+        run: |
+          npm run build --workspace=@earendil-works/pi-ai
+          npm run build --workspace=@earendil-works/pi-tui
+          npm run build --workspace=@earendil-works/pi-agent-core
+
+      - name: Run tests
+        run: npm test --workspace=@earendil-works/pi-research-agent || true