fix: backward compatibility for the default behavior of AgentSideConnection

Signed-off-by: Frost Ming <me@frostming.com>

Author: frostming

examples/client.py

@@ -9,12 +9,12 @@
 
 from acp import (
     Client,
-    ClientSideConnection,
     connect_to_agent,
     RequestError,
     text_block,
     PROTOCOL_VERSION,
 )
+from acp.core import ClientSideConnection
 from acp.schema import (
     AgentMessageChunk,
     AgentPlanUpdate,

src/acp/agent/connection.py

@@ -55,7 +55,7 @@ def __init__(
         to_agent: Callable[[Client], Agent] | Agent,
         input_stream: Any,
         output_stream: Any,
-        listening: bool = False,
+        listening: bool = True,
         **connection_kwargs: Any,
     ) -> None:
         agent = to_agent(cast(Client, self)) if callable(to_agent) else to_agent

src/acp/core.py

@@ -50,7 +50,7 @@ async def run_agent(
 
     if input_stream is None and output_stream is None:
         output_stream, input_stream = await stdio_streams()
-    conn = AgentSideConnection(agent, input_stream, output_stream, **connection_kwargs)
+    conn = AgentSideConnection(agent, input_stream, output_stream, listening=False, **connection_kwargs)
     await conn.listen()