fix on GET

main.py

@@ -6,31 +6,33 @@ from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
 from a2a.server.tasks import InMemoryTaskStore
 
-# use the typed models from the SDK
+# Typed models expected by the server
 from a2a.types import AgentCard, AgentCapabilities, AgentSkill
 
-# Minimal executor
+
+# ---- Minimal agent executor --------------------------------------------------
 class HelloWorldAgentExecutor:
     async def call(self, message: str, **kwargs):
+        # Return whatever your A2A client expects (text is fine for a demo)
         return {"text": f"Hello from A2A on HF Spaces! You said: {message}"}
 
+
 def build_app():
-    # Define at least one skill (IDs are free-form but should be stable)
+    # At least one skill is recommended
     hello_skill = AgentSkill(
         id="hello",
         name="Say Hello",
         description="Return a friendly greeting",
         tags=["hello", "demo"],
-        examples=["hi", "hello there"],
+        examples=["hi", "hello there", "yo"],
     )
 
-    # HF Spaces gives you a PORT; URL here is informational for clients
-    public_url = os.getenv("SPACE_HOST")  # e.g. "username-space.hf.space"
+    # Optional public URL (HF sets SPACE_HOST, but this is just metadata)
+    public_url = os.getenv("SPACE_HOST")
     if public_url:
         public_url = f"https://{public_url}/"
     else:
-        # local/dev fallback
-        public_url = f"http://0.0.0.0:{os.getenv('PORT', '7860')}/"
+        public_url = ""
 
     agent_card = AgentCard(
         name="HF A2A Agent",
@@ -38,24 +40,42 @@ def build_app():
         version="1.0.0",
         url=public_url,
         protocol_version="0.3.0",
-        default_input_modes=["text"],
-        default_output_modes=["text"],
+        default_input_modes=["text/plain", "application/json"],
+        default_output_modes=["text/plain", "application/json"],
         capabilities=AgentCapabilities(streaming=False),
         skills=[hello_skill],
-        # keep it simple: no authenticated extended card for now
+        # Keep it simple; no extended card
         supports_authenticated_extended_card=False,
     )
 
-    app_builder = A2AStarletteApplication(
+    app = A2AStarletteApplication(
         agent_card=agent_card,
         http_handler=DefaultRequestHandler(
             agent_executor=HelloWorldAgentExecutor(),
             task_store=InMemoryTaskStore(),
         ),
-        # extended_agent_card=...  # only if you actually support it
-    )
-    return app_builder.build()
+    ).build()
+
+    # ---- Add GET endpoints so HF/browser doesn't 405 on "/" ------------------
+    from starlette.responses import HTMLResponse, PlainTextResponse
+
+    async def landing(_):
+        return HTMLResponse(
+            "<h3>HF A2A Agent</h3>"
+            "<p>Health: <a href=\"/health\">/health</a></p>"
+            "<p>Send a message (POST JSON) to <code>/message/send</code>:</p>"
+            "<pre>{\"message\": \"hello\"}</pre>"
+        )
+
+    async def health(_):
+        return PlainTextResponse("ok")
+
+    app.router.add_route("/", landing, methods=["GET"])
+    app.router.add_route("/health", health, methods=["GET"])
+
+    return app
+
 
 if __name__ == "__main__":
-    port = int(os.getenv("PORT", "7860"))
+    port = int(os.getenv("PORT", "7860"))  # HF provides PORT
     uvicorn.run(build_app(), host="0.0.0.0", port=port)