> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Subagent Stop Input • AI Agent SDK
> SubagentStopInput: Input for SUBAGENT_STOP hooks (a spawned subagent reached a terminal state).
# SubagentStopInput
> Defined in the [**events**](../modules/events) module.
AI Agent
Input for SUBAGENT\_STOP hooks (a spawned subagent reached a terminal state).
Emitted from the single completion chokepoint in
`tools/subagent_tool.py`, so it covers every path: synchronous spawns,
`background=True` jobs, resolver-routed named agents, generic factory
spawns, and failures. `success` is False (with `error` populated) when
the subagent raised.
`agent_name` on the base :class:`HookInput` carries the subagent name.
```mermaid theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
%%{init: {'theme': 'base', 'themeVariables': { 'primaryColor': '#8B0000', 'primaryTextColor': '#fff', 'primaryBorderColor': '#710101', 'lineColor': '#189AB4', 'secondaryColor': '#189AB4', 'tertiaryColor': '#fff' }}}%%
graph LR
input["Input Data"] --> agent["Agent: SubagentStopInput"]
agent --> output["Output Result"]
style agent fill:#8B0000,color:#fff
style input fill:#8B0000,color:#fff
style output fill:#8B0000,color:#fff
```
## Properties
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* **to\_dict**: Generic utility method.
## Source
`praisonaiagents/hooks/events.py` at line 578
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## Related Documentation