---
title: "Get Trace"
method: GET
path: "/v2/projects/{project_id}/traces/{trace_id}"
tags: ["trace"]
---

# Get Trace

`GET /v2/projects/{project_id}/traces/{trace_id}`

## Path parameters

- `trace_id` string, uuid4, required
- `project_id` string, uuid4, required

## Query parameters

- `include_presigned_urls` boolean

## Response `200`

Successful Response

- union
  - ExtendedTraceRecordWithChildren
    - `spans` union[]
      - union
        - ExtendedAgentSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'agent' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` union — Output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `redacted_output` union — Redacted output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `agent_type` 'default' | 'planner' | 'react' | 'reflection' | 'router' | 'classifier' | 'supervisor' | 'judge'
          - `agent_name` string, nullable — Name of the agent.
        - ExtendedWorkflowSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'workflow' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` union — Output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `redacted_output` union — Redacted output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
        - ExtendedLlmSpanRecord
          - `type` 'llm' — Type of the trace, span or session.
          - `input` GalileoCoreSchemasLoggingLlmMessage[] — Input to the trace or span.
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `redacted_input` GalileoCoreSchemasLoggingLlmMessage[], nullable — Redacted input of the trace or span.
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `output` GalileoCoreSchemasLoggingLlmMessage
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `redacted_output` GalileoCoreSchemasLoggingLlmMessage
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` LlmMetrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
            - `num_input_tokens` integer, nullable — Number of input tokens.
            - `num_output_tokens` integer, nullable — Number of output tokens.
            - `num_total_tokens` integer, nullable — Total number of tokens.
            - `time_to_first_token_ns` integer, nullable — Time until the first token was generated in nanoseconds.
            - `num_image_input_tokens` integer, nullable — Number of image input tokens.
            - `num_audio_input_tokens` integer, nullable — Number of audio input tokens.
            - `num_audio_output_tokens` integer, nullable — Number of audio output tokens.
            - `num_image_output_tokens` integer, nullable — Number of image output tokens.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `tools` object[], nullable — List of available tools passed to the LLM on invocation.
          - `events` union[], nullable — List of reasoning, internal tool call, or MCP events that occurred during the LLM span.
            - union
              - …
          - `model` string, nullable — Model used for this span.
          - `temperature` number, nullable — Temperature used for generation.
          - `finish_reason` string, nullable — Reason for finishing.
        - ExtendedToolSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'tool' — Type of the trace, span or session.
          - `input` string — Input to the trace or span.
          - `redacted_input` string, nullable — Redacted input of the trace or span.
          - `output` string, nullable — Output of the trace or span.
          - `redacted_output` string, nullable — Redacted output of the trace or span.
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `tool_call_id` string, nullable — ID of the tool call.
        - ExtendedRetrieverSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'retriever' — Type of the trace, span or session.
          - `input` string — Input to the trace or span.
          - `redacted_input` string, nullable — Redacted input of the trace or span.
          - `output` DocumentOutput[] — Output of the trace or span.
            - `content` string, required — Content of the document.
            - `metadata` object
          - `redacted_output` DocumentOutput[], nullable — Redacted output of the trace or span.
            - `content` string, required — Content of the document.
            - `metadata` object
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
        - ExtendedControlSpanRecord
          - `type` 'control' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` ControlResult
            - `action` 'deny' | 'steer' | 'observe', required
            - `matched` boolean, required — Whether the control matched. False covers both non-match and error cases; use error_message to distinguish errors.
            - `confidence` number, nullable — Confidence score reported by the control evaluation result.
            - `error_message` string, nullable — Error text when control evaluation failed. This should be null for normal matches and non-matches.
          - `redacted_output` ControlResult
            - `action` 'deny' | 'steer' | 'observe', required
            - `matched` boolean, required — Whether the control matched. False covers both non-match and error cases; use error_message to distinguish errors.
            - `confidence` number, nullable — Confidence score reported by the control evaluation result.
            - `error_message` string, nullable — Error text when control evaluation failed. This should be null for normal matches and non-matches.
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `control_id` integer, nullable — Identifier of the control definition that produced this span.
          - `agent_name` string, nullable — Normalized agent name associated with this control execution.
          - `check_stage` 'pre' | 'post'
          - `applies_to` 'llm_call' | 'tool_call'
          - `evaluator_name` string, nullable — Representative evaluator name for this control span. For composite controls, this is the primary evaluator chosen for observability identity.
          - `selector_path` string, nullable — Representative selector path for this control span. For composite controls, this is the primary selector path chosen for observability identity.
    - `type` 'trace' — Type of the trace, span or session.
    - `input` union — Input to the trace or span.
      - string
      - union[]
        - union
          - TextContentPart — A text segment within a message.
            - `type` 'text'
            - `text` string, required
          - FileContentPart — Reference to a file associated with this message. The file_id can be resolved via the ``files`` dict returned on trace/span detail responses, which contains metadata such as modality, MIME type, and a presigned download URL.
            - `type` 'file'
            - `file_id` string, uuid4, required
    - `redacted_input` union — Redacted input of the trace or span.
      - string
      - union[]
        - union
          - TextContentPart — A text segment within a message.
            - `type` 'text'
            - `text` string, required
          - FileContentPart — Reference to a file associated with this message. The file_id can be resolved via the ``files`` dict returned on trace/span detail responses, which contains metadata such as modality, MIME type, and a presigned download URL.
            - `type` 'file'
            - `file_id` string, uuid4, required
    - `output` union — Output of the trace or span.
      - string
      - union[]
        - union
          - TextContentPart — A text segment within a message.
            - `type` 'text'
            - `text` string, required
          - FileContentPart — Reference to a file associated with this message. The file_id can be resolved via the ``files`` dict returned on trace/span detail responses, which contains metadata such as modality, MIME type, and a presigned download URL.
            - `type` 'file'
            - `file_id` string, uuid4, required
    - `redacted_output` union — Redacted output of the trace or span.
      - string
      - union[]
        - union
          - TextContentPart — A text segment within a message.
            - `type` 'text'
            - `text` string, required
          - FileContentPart — Reference to a file associated with this message. The file_id can be resolved via the ``files`` dict returned on trace/span detail responses, which contains metadata such as modality, MIME type, and a presigned download URL.
            - `type` 'file'
            - `file_id` string, uuid4, required
    - `name` string — Name of the trace, span or session.
    - `created_at` string, date-time — Timestamp of the trace or span's creation.
    - `user_metadata` object — Metadata associated with this trace or span.
    - `tags` string[] — Tags associated with this trace or span.
    - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
    - `metrics` Metrics
      - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
    - `external_id` string, nullable — A user-provided session, trace or span ID.
    - `dataset_input` string, nullable — Input to the dataset associated with this trace
    - `dataset_output` string, nullable — Output from the dataset associated with this trace
    - `dataset_metadata` object — Metadata from the dataset associated with this trace
    - `id` string, uuid4, required — Galileo ID of the trace
    - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
    - `trace_id` string, uuid4, required — Galileo ID of the trace containing the span (or the same value as id for a trace)
    - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
    - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
    - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
    - `has_children` boolean, nullable — Whether or not this trace or span has child spans
    - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
    - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
    - `feedback_rating_info` object — Feedback information related to the record
    - `annotations` object — Annotations keyed by template ID and annotator ID
    - `file_ids` string[] — IDs of files associated with this record
    - `file_modalities` ContentModality[] — Modalities of files associated with this record
    - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
    - `annotation_agreement` object — Annotation agreement scores keyed by template ID
    - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
    - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
    - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
    - `progress_message` string — Runner progress text written directly to CH span
    - `error_message` string — Runner error text written directly to CH span
    - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
    - `files` object, nullable — File metadata keyed by file ID for files associated with this record
    - `is_complete` boolean — Whether the trace is complete or not
    - `num_spans` integer, nullable
  - StubTraceRecord — Placeholder for a trace referenced by spans but not yet ingested. Synthesized when one or more spans declare trace_id=X but no TraceRecord with that id exists in storage. Holds the orphan spans together so the client can render them under a single root. Extends ExtendedRecordWithChildSpans so isinstance checks work uniformly for both real and stub traces.
    - `spans` union[]
      - union
        - ExtendedAgentSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'agent' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` union — Output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `redacted_output` union — Redacted output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `agent_type` 'default' | 'planner' | 'react' | 'reflection' | 'router' | 'classifier' | 'supervisor' | 'judge'
          - `agent_name` string, nullable — Name of the agent.
        - ExtendedWorkflowSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'workflow' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` union — Output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `redacted_output` union — Redacted output of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage
              - …
            - DocumentOutput[]
              - …
            - union[]
              - …
            - ControlResult
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
        - ExtendedLlmSpanRecord
          - `type` 'llm' — Type of the trace, span or session.
          - `input` GalileoCoreSchemasLoggingLlmMessage[] — Input to the trace or span.
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `redacted_input` GalileoCoreSchemasLoggingLlmMessage[], nullable — Redacted input of the trace or span.
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `output` GalileoCoreSchemasLoggingLlmMessage
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `redacted_output` GalileoCoreSchemasLoggingLlmMessage
            - `content` union, required
              - …
            - `role` 'agent' | 'assistant' | 'developer' | 'function' | 'system' | 'tool' | 'user', required
            - `tool_call_id` string, nullable
            - `tool_calls` ToolCall[], nullable
              - …
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` LlmMetrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
            - `num_input_tokens` integer, nullable — Number of input tokens.
            - `num_output_tokens` integer, nullable — Number of output tokens.
            - `num_total_tokens` integer, nullable — Total number of tokens.
            - `time_to_first_token_ns` integer, nullable — Time until the first token was generated in nanoseconds.
            - `num_image_input_tokens` integer, nullable — Number of image input tokens.
            - `num_audio_input_tokens` integer, nullable — Number of audio input tokens.
            - `num_audio_output_tokens` integer, nullable — Number of audio output tokens.
            - `num_image_output_tokens` integer, nullable — Number of image output tokens.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `tools` object[], nullable — List of available tools passed to the LLM on invocation.
          - `events` union[], nullable — List of reasoning, internal tool call, or MCP events that occurred during the LLM span.
            - union
              - …
          - `model` string, nullable — Model used for this span.
          - `temperature` number, nullable — Temperature used for generation.
          - `finish_reason` string, nullable — Reason for finishing.
        - ExtendedToolSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'tool' — Type of the trace, span or session.
          - `input` string — Input to the trace or span.
          - `redacted_input` string, nullable — Redacted input of the trace or span.
          - `output` string, nullable — Output of the trace or span.
          - `redacted_output` string, nullable — Redacted output of the trace or span.
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `tool_call_id` string, nullable — ID of the tool call.
        - ExtendedRetrieverSpanRecordWithChildren
          - `spans` union[]
            - union
              - …
          - `type` 'retriever' — Type of the trace, span or session.
          - `input` string — Input to the trace or span.
          - `redacted_input` string, nullable — Redacted input of the trace or span.
          - `output` DocumentOutput[] — Output of the trace or span.
            - `content` string, required — Content of the document.
            - `metadata` object
          - `redacted_output` DocumentOutput[], nullable — Redacted output of the trace or span.
            - `content` string, required — Content of the document.
            - `metadata` object
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
        - ExtendedControlSpanRecord
          - `type` 'control' — Type of the trace, span or session.
          - `input` union — Input to the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `redacted_input` union — Redacted input of the trace or span.
            - string
            - GalileoCoreSchemasLoggingLlmMessage[]
              - …
            - union[]
              - …
          - `output` ControlResult
            - `action` 'deny' | 'steer' | 'observe', required
            - `matched` boolean, required — Whether the control matched. False covers both non-match and error cases; use error_message to distinguish errors.
            - `confidence` number, nullable — Confidence score reported by the control evaluation result.
            - `error_message` string, nullable — Error text when control evaluation failed. This should be null for normal matches and non-matches.
          - `redacted_output` ControlResult
            - `action` 'deny' | 'steer' | 'observe', required
            - `matched` boolean, required — Whether the control matched. False covers both non-match and error cases; use error_message to distinguish errors.
            - `confidence` number, nullable — Confidence score reported by the control evaluation result.
            - `error_message` string, nullable — Error text when control evaluation failed. This should be null for normal matches and non-matches.
          - `name` string — Name of the trace, span or session.
          - `created_at` string, date-time — Timestamp of the trace or span's creation.
          - `user_metadata` object — Metadata associated with this trace or span.
          - `tags` string[] — Tags associated with this trace or span.
          - `status_code` integer, nullable — Status code of the trace or span. Used for logging failure or error states.
          - `metrics` Metrics
            - `duration_ns` integer, nullable — Duration of the trace or span in nanoseconds. Displayed as 'Latency' in Galileo.
          - `external_id` string, nullable — A user-provided session, trace or span ID.
          - `dataset_input` string, nullable — Input to the dataset associated with this trace
          - `dataset_output` string, nullable — Output from the dataset associated with this trace
          - `dataset_metadata` object — Metadata from the dataset associated with this trace
          - `id` string, uuid4, required — Galileo ID of the session, trace or span
          - `session_id` string, uuid4, required — Galileo ID of the session containing the trace (or the same value as id for a trace)
          - `trace_id` string, uuid4, nullable — Galileo ID of the trace containing the span (or the same value as id for a trace)
          - `project_id` string, uuid4, required — Galileo ID of the project associated with this trace or span
          - `run_id` string, uuid4, required — Galileo ID of the run (log stream or experiment) associated with this trace or span
          - `updated_at` string, date-time, nullable — Timestamp of the session or trace or span's last update
          - `has_children` boolean, nullable — Whether or not this trace or span has child spans
          - `metrics_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `session_batch_id` string, uuid4, nullable — Galileo ID of the metrics batch associated with this trace or span
          - `feedback_rating_info` object — Feedback information related to the record
          - `annotations` object — Annotations keyed by template ID and annotator ID
          - `file_ids` string[] — IDs of files associated with this record
          - `file_modalities` ContentModality[] — Modalities of files associated with this record
          - `annotation_aggregates` object — Annotation aggregate information keyed by template ID
          - `annotation_agreement` object — Annotation agreement scores keyed by template ID
          - `overall_annotation_agreement` number, nullable — Average annotation agreement across all templates in the queue
          - `annotation_queue_ids` string[] — IDs of annotation queues this record is in
          - `fully_annotated` boolean, nullable — Whether every field is annotated by every annotator in the queue
          - `progress_message` string — Runner progress text written directly to CH span
          - `error_message` string — Runner error text written directly to CH span
          - `metric_info` object, nullable — Detailed information about the metrics associated with this trace or span
          - `files` object, nullable — File metadata keyed by file ID for files associated with this record
          - `parent_id` string, uuid4, required — Galileo ID of the parent of this span
          - `is_complete` boolean — Whether the parent trace is complete or not
          - `step_number` integer, nullable — Topological step number of the span.
          - `control_id` integer, nullable — Identifier of the control definition that produced this span.
          - `agent_name` string, nullable — Normalized agent name associated with this control execution.
          - `check_stage` 'pre' | 'post'
          - `applies_to` 'llm_call' | 'tool_call'
          - `evaluator_name` string, nullable — Representative evaluator name for this control span. For composite controls, this is the primary evaluator chosen for observability identity.
          - `selector_path` string, nullable — Representative selector path for this control span. For composite controls, this is the primary selector path chosen for observability identity.
    - `type` 'stub_trace' — Discriminator; identifies this as a synthesized placeholder, not a real trace.
    - `id` string, uuid4, required — ID of the missing trace, taken from span trace_id references.
    - `project_id` string, uuid4, nullable — Project ID inferred from child spans, if all agree; otherwise None.
    - `run_id` string, uuid4, nullable — Run ID inferred from child spans, if all agree; otherwise None.
    - `session_id` string, uuid4, nullable — Session ID inferred from child spans, if all agree; otherwise None.
    - `created_at` string, date-time, required — Earliest created_at among child spans; used to order under a session.

## Other responses

- `422` — Validation Error

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[API](https://skmtc.net/galileo/apis/galileo-api-server.md) · [All operations](https://skmtc.net/galileo/apis/galileo-api-server/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/galileo/galileo-api-server/versions/933e8c8e6366/schema)
