Allow A2A 0.3 clients

Signed-off-by: Ed Snible <snible@us.ibm.com>

Author: esnible

a2a/claude_agent/src/claude_agent/agent.py

@@ -130,7 +130,8 @@ def run() -> None:
     # assemble into a Starlette app ourselves. Serve the current well-known path
     # (/.well-known/agent-card.json) plus the legacy /.well-known/agent.json for
     # back-compat.
-    routes = create_jsonrpc_routes(request_handler, rpc_url="/")
+    # enable_v0_3_compat is needed because Kagenti uses A2A 0.3 client libraries
+    routes = create_jsonrpc_routes(request_handler, rpc_url="/", enable_v0_3_compat=True)
     routes += create_agent_card_routes(agent_card)
     routes += create_agent_card_routes(agent_card, card_url="/.well-known/agent.json")
     app = Starlette(routes=routes)

a2a/generic_agent/src/generic_agent/agent.py

@@ -217,7 +217,8 @@ def run():
 
     # a2a-sdk 1.x replaced A2AStarletteApplication with route factories that we
     # assemble into a Starlette app ourselves.
-    routes = create_jsonrpc_routes(request_handler, rpc_url="/")
+    # enable_v0_3_compat is needed because Kagenti uses A2A 0.3 client libraries
+    routes = create_jsonrpc_routes(request_handler, rpc_url="/", enable_v0_3_compat=True)
     # Serve the current well-known path (/.well-known/agent-card.json) plus the
     # legacy /.well-known/agent.json path for backward compatibility.
     routes += create_agent_card_routes(agent_card)

a2a/git_issue_agent/a2a_agent.py

@@ -218,7 +218,8 @@ def run():
 
     # a2a-sdk 1.x replaced A2AStarletteApplication with route factories that we
     # assemble into a Starlette app ourselves.
-    routes = create_jsonrpc_routes(request_handler, rpc_url="/")
+    # enable_v0_3_compat is needed because Kagenti uses A2A 0.3 client libraries
+    routes = create_jsonrpc_routes(request_handler, rpc_url="/", enable_v0_3_compat=True)
     # Serve the current well-known path (/.well-known/agent-card.json) plus the
     # legacy /.well-known/agent.json path for backward compatibility.
     routes += create_agent_card_routes(agent_card)

a2a/simple_generalist/src/simple_generalist/a2a_server/server.py

@@ -236,7 +236,8 @@ def create_app(settings: Settings) -> Any:
 
     # a2a-sdk 1.x replaced A2AStarletteApplication with route factories that we
     # assemble into a Starlette app ourselves.
-    routes = create_jsonrpc_routes(request_handler, rpc_url="/")
+    # enable_v0_3_compat is needed because Kagenti uses A2A 0.3 client libraries
+    routes = create_jsonrpc_routes(request_handler, rpc_url="/", enable_v0_3_compat=True)
     # Serve the current well-known path (/.well-known/agent-card.json) plus the
     # legacy /.well-known/agent.json path for backward compatibility.
     routes += create_agent_card_routes(agent_card)

a2a/weather_service/src/weather_service/agent.py

@@ -249,7 +249,8 @@ def run():
 
     # a2a-sdk 1.x replaced A2AStarletteApplication with route factories that we
     # assemble into a Starlette app ourselves.
-    routes = create_jsonrpc_routes(request_handler, rpc_url="/")
+    # enable_v0_3_compat is needed because Kagenti uses A2A 0.3 client libraries
+    routes = create_jsonrpc_routes(request_handler, rpc_url="/", enable_v0_3_compat=True)
     # Serve the current well-known path (/.well-known/agent-card.json) plus the
     # legacy /.well-known/agent.json path for backward compatibility.
     routes += create_agent_card_routes(agent_card)