Update the agent/contact_lookup sample to use the a2ui-agent python SDK

Tested:
- [x] The contact_lookup client successfully connected to the contact_lookup
agent and rendered the response correctly.

Author: nan-yu

a2a_agents/python/a2ui_agent/src/a2ui/inference/schema/manager.py

@@ -36,7 +36,8 @@
     find_repo_root,
 )
 from .catalog import CustomCatalogConfig, A2uiCatalog
-from ...extension.a2ui_extension import INLINE_CATALOGS_KEY, SUPPORTED_CATALOG_IDS_KEY
+from ...extension.a2ui_extension import INLINE_CATALOGS_KEY, SUPPORTED_CATALOG_IDS_KEY, get_a2ui_agent_extension
+from a2a.types import AgentExtension
 
 
 def _load_basic_component(version: str, spec_name: str) -> Dict:
@@ -322,3 +323,7 @@ def generate_system_prompt(
         parts.append(f"### Examples:\n{examples_str}")
 
     return "\n\n".join(parts)
+
+  def get_agent_extension(self) -> AgentExtension:
+    catalog_ids = self._supported_catalogs.keys()
+    return get_a2ui_agent_extension(supported_catalog_ids=list(catalog_ids))

samples/agent/adk/contact_lookup/__main__.py

@@ -19,8 +19,6 @@
 from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
 from a2a.server.tasks import InMemoryTaskStore
-from a2a.types import AgentCapabilities, AgentCard, AgentSkill
-from a2ui.extension.a2ui_extension import get_a2ui_agent_extension
 from agent import ContactAgent
 from agent_executor import ContactAgentExecutor
 from dotenv import load_dotenv
@@ -50,44 +48,18 @@ def main(host, port):
             " is not TRUE."
         )
 
-    capabilities = AgentCapabilities(
-        streaming=True,
-        extensions=[get_a2ui_agent_extension()],
-    )
-    skill = AgentSkill(
-        id="find_contact",
-        name="Find Contact Tool",
-        description=(
-            "Helps find contact information for colleagues (e.g., email, location,"
-            " team)."
-        ),
-        tags=["contact", "directory", "people", "finder"],
-        examples=["Who is David Chen in marketing?", "Find Sarah Lee from engineering"],
-    )
-
     base_url = f"http://{host}:{port}"
+    ui_agent = ContactAgent(base_url=base_url, use_ui=True)
+    text_agent = ContactAgent(base_url=base_url, use_ui=False)
 
-    agent_card = AgentCard(
-        name="Contact Lookup Agent",
-        description=(
-            "This agent helps find contact info for people in your organization."
-        ),
-        url=base_url,  # <-- Use base_url here
-        version="1.0.0",
-        default_input_modes=ContactAgent.SUPPORTED_CONTENT_TYPES,
-        default_output_modes=ContactAgent.SUPPORTED_CONTENT_TYPES,
-        capabilities=capabilities,
-        skills=[skill],
-    )
-
-    agent_executor = ContactAgentExecutor(base_url=base_url)
+    agent_executor = ContactAgentExecutor(ui_agent=ui_agent, text_agent=text_agent)
 
     request_handler = DefaultRequestHandler(
         agent_executor=agent_executor,
         task_store=InMemoryTaskStore(),
     )
     server = A2AStarletteApplication(
-        agent_card=agent_card, http_handler=request_handler
+        agent_card=ui_agent.get_agent_card(), http_handler=request_handler
     )
     import uvicorn