feat: Add --session_id option to adk run:

--session_id : The session ID to save the session to on exit when --save_session is set to true. User will be prompted to enter a session ID if not set.

PiperOrigin-RevId: 756335619

src/google/adk/cli/cli.py

@@ -105,6 +105,7 @@ async def run_cli(
     input_file: Optional[str] = None,
     saved_session_file: Optional[str] = None,
     save_session: bool,
+    session_id: Optional[str] = None,
 ) -> None:
   """Runs an interactive CLI for a certain agent.
 
@@ -118,6 +119,7 @@ async def run_cli(
     saved_session_file: Optional[str], the absolute path to the json file that
       contains a previously saved session, exclusive with input_file.
     save_session: bool, whether to save the session on exit.
+    session_id: Optional[str], the session ID to save the session to on exit.
   """
   if agent_parent_dir not in sys.path:
     sys.path.append(agent_parent_dir)
@@ -175,7 +177,7 @@ async def run_cli(
     )
 
   if save_session:
-    session_id = input('Session ID to save: ')
+    session_id = session_id or input('Session ID to save: ')
     session_path = f'{agent_module_path}/{session_id}.session.json'
 
     # Fetch the session again to get all the details.

src/google/adk/cli/cli_tools_click.py

@@ -122,6 +122,15 @@ def validate_exclusive(ctx, param, value):
     default=False,
     help="Optional. Whether to save the session to a json file on exit.",
 )
+@click.option(
+    "--session_id",
+    type=str,
+    help=(
+        "Optional. The session ID to save the session to on exit when"
+        " --save_session is set to true. User will be prompted to enter a"
+        " session ID if not set."
+    ),
+)
 @click.option(
     "--replay",
     type=click.Path(
@@ -156,6 +165,7 @@ def validate_exclusive(ctx, param, value):
 def cli_run(
     agent: str,
     save_session: bool,
+    session_id: Optional[str],
     replay: Optional[str],
     resume: Optional[str],
 ):
@@ -179,6 +189,7 @@ def cli_run(
           input_file=replay,
           saved_session_file=resume,
           save_session=save_session,
+          session_id=session_id,
       )
   )