feat: add /health endpoint to all starter integration examples (CopilotKit#3738)

## Summary

Adds a `/health` GET endpoint returning `{"status": "ok"}` to all 11
starter integration examples. This is a best practice for any deployed
service — health checks enable platform health monitoring, load balancer
probes, and container lifecycle management.

**11 starters updated:**
- adk, agent-spec, agno, crewai-crews, crewai-flows, langgraph-fastapi,
llamaindex, ms-agent-framework-dotnet, ms-agent-framework-python,
pydantic-ai, strands-python

**1 skipped:**
- langgraph-python — uses `langgraph dev` which provides its own `/ok`
endpoint

All `/health` endpoints are registered before any catch-all mount to
ensure they take priority (lesson learned from the pydantic-ai showcase
bug).

## Test plan

- [ ] Each starter builds successfully
- [ ] `curl localhost:8000/health` returns `{"status": "ok"}` on each

Author: jpr5

examples/integrations/adk/agent/main.py

@@ -186,6 +186,11 @@ def simple_after_model_modifier(
 # Add the ADK endpoint
 add_adk_fastapi_endpoint(app, adk_proverbs_agent, path="/")
 
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
 if __name__ == "__main__":
     import os
 

examples/integrations/agent-spec/agent/src/main.py

@@ -19,6 +19,11 @@ def build_server() -> FastAPI:
 app = build_server()
 
 
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 if __name__ == "__main__":
     uvicorn.run(
         "main:app",

examples/integrations/agno/agent/main.py

@@ -14,5 +14,11 @@
 agent_os = AgentOS(agents=[agent], interfaces=[AGUI(agent=agent)])
 app = agent_os.get_app()
 
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 if __name__ == "__main__":
     agent_os.serve(app="main:app", port=8000, reload=True)

examples/integrations/crewai-crews/agent/server.py

@@ -8,6 +8,13 @@
 load_dotenv()
 
 app = FastAPI()
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 add_crewai_crew_fastapi_endpoint(app, LatestAiDevelopment(), "/")
 
 def main():

examples/integrations/crewai-flows/agent/main.py

@@ -9,6 +9,13 @@
 load_dotenv()
 
 app = FastAPI()
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 add_crewai_flow_fastapi_endpoint(app, SampleAgentFlow(), "/")
 
 

examples/integrations/langgraph-fastapi/agent/main.py

@@ -10,6 +10,12 @@
 _ = load_dotenv()
 app = FastAPI()
 
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 add_langgraph_fastapi_endpoint(
     app=app,
     agent=LangGraphAGUIAgent(

examples/integrations/llamaindex/agent/main.py

@@ -5,6 +5,13 @@
 from src.agent import agentic_chat_router
 
 app = FastAPI()
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 app.include_router(agentic_chat_router)
 
 

examples/integrations/ms-agent-framework-dotnet/agent/Program.cs

@@ -18,6 +18,8 @@
 var loggerFactory = app.Services.GetRequiredService<ILoggerFactory>();
 var jsonOptions = app.Services.GetRequiredService<IOptions<JsonOptions>>();
 var agentFactory = new ProverbsAgentFactory(builder.Configuration, loggerFactory, jsonOptions.Value.SerializerOptions);
+
+app.MapGet("/health", () => Results.Ok(new { status = "ok" }));
 app.MapAGUI("/", agentFactory.CreateProverbsAgent());
 
 await app.RunAsync();

examples/integrations/ms-agent-framework-python/agent/src/main.py

@@ -55,13 +55,19 @@ def _build_chat_client() -> ChatClientProtocol:
     allow_headers=["*"],
 )
 
+
 add_agent_framework_fastapi_endpoint(
     app=app,
     agent=my_agent,
     path="/",
 )
 
 
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
 if __name__ == "__main__":
     host = os.getenv("AGENT_HOST", "0.0.0.0")
     port = int(os.getenv("AGENT_PORT", "8000"))

examples/integrations/pydantic-ai/agent/src/main.py

@@ -1,9 +1,23 @@
 from agent import ProverbsState, StateDeps, agent
+from starlette.applications import Starlette
+from starlette.responses import JSONResponse
+from starlette.routing import Mount, Route
 
-app = agent.to_ag_ui(deps=StateDeps(ProverbsState()))
+agui_app = agent.to_ag_ui(deps=StateDeps(ProverbsState()))
+
+
+async def health(request):
+    return JSONResponse({"status": "ok"})
+
+
+app = Starlette(
+    routes=[
+        Route("/health", health),
+        Mount("/", app=agui_app),
+    ]
+)
 
 if __name__ == "__main__":
-    # run the app
     import uvicorn
 
     uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)