> This page is for NeMo Relay, version v0.10.0.
> 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.

# 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-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

<pre />

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>`

Legacy event payload field retained for source compatibility.

The ATIF exporter does not translate point-in-time mark events into trajectory steps, so exporter-produced steps leave this field unset.

### `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`

<pre />

#### `clone`

<pre />

#### `clone_from`

<pre />

### `impl Debug for AtifStepExtra`

<pre />

#### `fmt`

<pre />

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

<pre />

#### `deserialize`

<pre />

### `impl Serialize for AtifStepExtra`

<pre />

#### `serialize`

<pre />