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fix: dump safe json whenever string is required in lg-python fastapi #648

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Merged
merged 3 commits into from
Nov 7, 2025
Merged

fix: dump safe json whenever string is required in lg-python fastapi #648

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4868dae
fix: dump safe json whenever string is required in lg-python fastapi
ranst91 Nov 6, 2025
84d1d92
chore: release agui langgraph fastapi 0.0.19
ranst91 Nov 6, 2025
14f0ce9
Merge branch 'main' into fix/python-json-safe-values
ranst91 Nov 7, 2025
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12 changes: 8 additions & 4 deletions integrations/langgraph/python/ag_ui_langgraph/agent.py
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Original file line number Diff line number Diff line change
Expand Up @@ -235,7 +235,7 @@ async def _handle_stream_events(self, input: RunAgentInput) -> AsyncGenerator[st
CustomEvent(
type=EventType.CUSTOM,
name=LangGraphEventTypes.OnInterrupt.value,
value=json.dumps(interrupt.value, default=json_safe_stringify) if not isinstance(interrupt.value, str) else interrupt.value,
value=dump_json_safe(interrupt.value),
raw_event=interrupt,
)
)
Expand Down Expand Up @@ -311,7 +311,7 @@ async def prepare_stream(self, input: RunAgentInput, agent_state: State, config:
CustomEvent(
type=EventType.CUSTOM,
name=LangGraphEventTypes.OnInterrupt.value,
value=json.dumps(interrupt.value) if not isinstance(interrupt.value, str) else interrupt.value,
value=dump_json_safe(interrupt.value),
raw_event=interrupt,
)
)
Expand Down Expand Up @@ -741,7 +741,7 @@ async def _handle_single_event(self, event: Any, state: State) -> AsyncGenerator
ToolCallArgsEvent(
type=EventType.TOOL_CALL_ARGS,
tool_call_id=tool_call_output.tool_call_id,
delta=json.dumps(event["data"]["input"]),
delta=dump_json_safe(event["data"]["input"]),
raw_event=event
)
)
Expand All @@ -758,7 +758,7 @@ async def _handle_single_event(self, event: Any, state: State) -> AsyncGenerator
type=EventType.TOOL_CALL_RESULT,
tool_call_id=tool_call_output.tool_call_id,
message_id=str(uuid.uuid4()),
content=tool_call_output.content,
content=dump_json_safe(tool_call_output.content),
role="tool"
)
)
Expand Down Expand Up @@ -917,3 +917,7 @@ def get_stream_kwargs(
kwargs.update(fork)

return kwargs


def dump_json_safe(value):
return json.dumps(value, default=json_safe_stringify) if not isinstance(value, str) else value
2 changes: 1 addition & 1 deletion integrations/langgraph/python/pyproject.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
[tool.poetry]
name = "ag-ui-langgraph"
version = "0.0.18a0"
version = "0.0.19"
description = "Implementation of the AG-UI protocol for LangGraph."
authors = ["Ran Shem Tov <[email protected]>"]
readme = "README.md"
Expand Down
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