> 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 full documentation content, see https://docs.nvidia.com/nemo/relay/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Struct Atif Step Extra

> Lineage payload serialized into ATIF `Step.extra`.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-ffi`.

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Lineage payload serialized into ATIF `Step.extra`.

`tool_ancestry[i]` and `tool_invocations[i]` align by index with `Step.tool_calls[i]`.

## Fields

### `ancestry: AtifAncestry`

Step-level callable lineage.

### `invocation: Option<AtifInvocationInfo>`

Step-level invocation timing.

### `llm_request: Option<Json>`

Full unwrapped LLM request payload for request-level fidelity.

### `llm_response: Option<Json>`

Full raw LLM response payload for response-level fidelity.

### `event_payload: Option<Json>`

Full raw point-in-time event payload for mark/system steps.

### `tool_ancestry: Vec<AtifAncestry>`

Per-tool callable lineage, aligned with `tool_calls`.

### `tool_invocations: Option<Vec<AtifInvocationInfo>>`

Per-tool invocation timing, aligned with `tool_calls`.

## Trait Implementations

### `impl Clone for AtifStepExtra`

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#### `clone`

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#### `clone_from`

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### `impl Debug for AtifStepExtra`

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#### `fmt`

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### `impl<'de> Deserialize<'de> for AtifStepExtra`

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#### `deserialize`

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### `impl Serialize for AtifStepExtra`

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#### `serialize`

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