> This page is for NeMo Relay, version v0.9.4.
> For other versions, use one of these documentation indexes:
> - Latest (v0.10.0) (default): https://docs.nvidia.com/nemo/relay/latest/llms.txt
> - dev: https://docs.nvidia.com/nemo/relay/dev/llms.txt
> - v0.10.0: https://docs.nvidia.com/nemo/relay/v0.10.0/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
> - v0.7.3: https://docs.nvidia.com/nemo/relay/v0.7.3/llms.txt
> - v0.6.0: https://docs.nvidia.com/nemo/relay/v0.6.0/llms.txt
> - v0.5.0: https://docs.nvidia.com/nemo/relay/v0.5.0/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# nemo_relay.integrations.deepagents.callbacks

> Deep Agents callback handler for NeMo Relay observability.

Generated from `python/nemo_relay/integrations/deepagents/callbacks.py`.

Module `nemo_relay.integrations.deepagents.callbacks`.

Deep Agents callback handler for NeMo Relay observability.

## Classes

### `NemoRelayDeepAgentsCallbackHandler(LangGraphNemoRelayCallbackHandler)`

Bridge semantic Deep Agents runs and LangGraph lifecycle events to NeMo Relay.

#### Methods

##### `NemoRelayDeepAgentsCallbackHandler`

```python
def NemoRelayDeepAgentsCallbackHandler(*args: Any, **kwargs: Any) -> None
```

Create an instance.

##### `on_chain_start`

```python
def on_chain_start(serialized: dict[str, Any], inputs: dict[str, Any], *, run_id: UUID, parent_run_id: UUID | None = None, tags: list[str] | None = None, metadata: dict[str, Any] | None = None, **kwargs: Any) -> Any
```

Push scopes for Deep Agents orchestrators and subagents, not graph nodes.