Langgraph update

.github/test.py

@@ -0,0 +1,56 @@
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+from dotenv import dotenv_values
+
+REFERENCE_SCRIPTS = [
+    ("binance_mcp_reference_implementation/binance_mcp.py", []),
+    ("binance_mcp_reference_implementation/binance_mcp_w_prompt.py", []),
+    ("binance_mcp_reference_implementation/binance_mcp_w_resource.py", []),
+    ("binance_mcp/binance_mcp.py", []),
+    ("langgraph/price_graph.py", []),
+    ("ref_openai_mcp/function_calling.py", ["openai"]),
+    ("ref_openai_mcp/mcp_with_openai_agent.py", ["openai"]),
+    ("ref_openai_mcp/mcp_with_responses_api.py", ["openai"]),
+]
+
+# Load .env only for missing env vars
+if Path(".env").exists():
+    env_config = dotenv_values(".env")
+    for k, v in env_config.items():
+        if k not in os.environ:
+            os.environ[k] = v
+
+
+def run_script(script_path):
+    result = subprocess.run(
+        [sys.executable, script_path], capture_output=True, text=True
+    )
+    print(f"\n--- Output of {script_path} ---\n{result.stdout}")
+    if result.returncode != 0:
+        print(f"--- Error output of {script_path} ---\n{result.stderr}")
+    return result.returncode
+
+
+def install_dependency_groups(groups):
+    if not groups:
+        return
+    for g in groups:
+        cmd = f"uv sync --group {g}"
+        # Use bash to support process substitution
+        result = subprocess.run(cmd, shell=True, executable="/bin/bash")
+        if result.returncode != 0:
+            raise RuntimeError(f"Failed to install dependency groups: {groups}")
+
+
+@pytest.mark.parametrize("script_path,groups", REFERENCE_SCRIPTS)
+def test_reference_script(script_path, groups):
+    install_dependency_groups(groups)
+    assert run_script(script_path) == 0
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main([__file__]))

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install dependencies with uv
+        run: |
+          uv venv
+          source .venv/bin/activate
+          uv pip install -e .
+          uv pip install -r <(uv pip compile --extra ci pyproject.toml)
+
+      - name: Run tests
+        run: |
+          source .venv/bin/activate
+          pytest test.py 

.gitignore

@@ -11,3 +11,4 @@ typescript_mcp/node_modules/
 # Courseware dev
 /dev
 /.archive
+!.github/

langgraph/price_graph.py

@@ -35,8 +35,9 @@
 
 
 async def get_crypto_prices():
-    async with MultiServerMCPClient(mcp_config) as client:
-        tools = client.get_tools()
+    client = MultiServerMCPClient(mcp_config)
+    async with client.session("binance") as session:
+        tools = await client.get_tools()
 
         agent = create_react_agent(model, tools)
 

pyproject.toml

@@ -5,19 +5,19 @@ description = "MCP Course projects"
 requires-python = ">=3.10"
 dependencies = [
     # From binance-mcp
-    "mcp[cli]==1.6.0",
+    "mcp[cli]==1.9.2",
     "requests==2.32.3", # Also for llm-tool-use
     # From llm-tool-use
     "python-dotenv==1.1.0",
     "google-generativeai==0.8.5",
     # Jupyter support
     "ipykernel>=6.29.5",
     "ipywidgets>=8.1.6",
-    "langchain==0.3.25",
-    "langchain-openai==0.3.16",
-    "langchain-core==0.3.59",
-    "langchain-mcp-adapters==0.0.9",
-    "langgraph==0.4.3",
+    "langchain==0.3.26",
+    "langchain-openai==0.3.27",
+    "langchain-core==0.3.68",
+    "langchain-mcp-adapters==0.1.9",
+    "langgraph==0.5.2",
     "langchain-google-genai==2.0.10",
     "black>=25.1.0",
 ]
@@ -43,3 +43,8 @@ openai = [
     "openai",
     "openai-agents",
 ]
+
+ci = [
+    "pytest",
+    "pytest-dotenv",
+]