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feat: Implement checkpoint and resume logic for LoopAgent

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PiperOrigin-RevId: 813096880
This commit is contained in:
Shangjie Chen
2025-09-29 22:45:57 -07:00
committed by Copybara-Service
parent d5c46e4960
commit ce9c39f5a8
4 changed files with 215 additions and 41 deletions
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tests/unittests/flows/llm_flows/test_agent_transfer.py
+26 -1
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@@ -14,6 +14,7 @@
from google.adk.agents.llm_agent import Agent
from google.adk.agents.loop_agent import LoopAgent
from google.adk.agents.loop_agent import LoopAgentState
from google.adk.agents.sequential_agent import SequentialAgent
from google.adk.agents.sequential_agent import SequentialAgentState
from google.adk.apps.app import App
@@ -469,12 +470,36 @@ def test_auto_to_loop(is_resumable: bool):
('root_agent', transfer_call_part('sub_agent_1')),
('root_agent', TRANSFER_RESPONSE_PART),
# Loops.
(
'sub_agent_1',
LoopAgentState(current_sub_agent='sub_agent_1_1').model_dump(
mode='json'
),
),
('sub_agent_1_1', 'response1'),
('sub_agent_1_1', END_OF_AGENT),
(
'sub_agent_1',
LoopAgentState(current_sub_agent='sub_agent_1_2').model_dump(
mode='json'
),
),
('sub_agent_1_2', 'response2'),
('sub_agent_1_2', END_OF_AGENT),
(
'sub_agent_1',
LoopAgentState(
current_sub_agent='sub_agent_1_1', times_looped=1
).model_dump(mode='json'),
),
('sub_agent_1_1', 'response3'),
('sub_agent_1_1', END_OF_AGENT),
(
'sub_agent_1',
LoopAgentState(
current_sub_agent='sub_agent_1_2', times_looped=1
).model_dump(mode='json'),
),
# Exits.
('sub_agent_1_2', Part.from_function_call(name='exit_loop', args={})),
(
@@ -484,7 +509,7 @@ def test_auto_to_loop(is_resumable: bool):
),
),
('sub_agent_1_2', END_OF_AGENT),
# Later expect the loop agent to also yield agent state events.
('sub_agent_1', END_OF_AGENT),
('root_agent', END_OF_AGENT),
]
# Same session, different invocation.