# FiddlerSpanProcessor

Span processor for Fiddler that denormalizes attributes from parent spans.

This processor copies specific attributes from parent spans to child spans, enabling better trace analysis and monitoring in Fiddler's observability platform.

## DENORMALIZED\_ATTRIBUTES

**Type:** `List[str]`

**Values:**

* `'gen_ai.agent.name'`
* `'gen_ai.agent.id'`
* `'gen_ai.conversation.id'`
* `'system_prompt'`
* `'gen_ai.tool.definitions'`

## on\_start()

Called when a span is started.

Copies denormalized attributes from the parent span to the current span.

## Parameters

| Parameter        | Type      | Required | Default | Description                    |
| ---------------- | --------- | -------- | ------- | ------------------------------ |
| `span`           | `Span`    | ✗        | `None`  | The span that is being started |
| `parent_context` | \`Context | None\`   | ✗       | `None`                         |

## force\_flush()

Force flush any pending spans. No-op for this processor.

This method is required by the SpanProcessor interface but is not needed for FiddlerSpanProcessor since it processes spans synchronously on\_start.

## Parameters

| Parameter        | Type  | Required | Default | Description                                                                                 |
| ---------------- | ----- | -------- | ------- | ------------------------------------------------------------------------------------------- |
| `timeout_millis` | `int` | ✗        | `30000` | Maximum time in milliseconds to wait for flush completion. Not used in this implementation. |

## Returns

Always returns True since this is a no-op implementation

**Return type:** bool