> ## Documentation Index
> Fetch the complete documentation index at: https://doc.featherhq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get the reconstructed engineering waterfall for a single v2 turn

> Per-turn engineering waterfall, reconstructed from Langfuse (ENG-689 T3).

Replaces the retired self-hosted ``…/turns/{turn_id}/telemetry`` read. Returns the
``TurnState.to_telemetry_dict()`` artifact the rich waterfall UI already renders (full detail,
PII-scrubbed per the org's config at emit time — ENG-686 T4).



## OpenAPI

````yaml /api-reference/openapi.json get /v1/v2/conversations/{conversation_id}/engineering/turns/{turn_id}
openapi: 3.1.0
info:
  title: Feather API
  description: >-
    Unified customer experience platform API. Manages identity, conversations,
    memory, agents, procedures, policies, model routing, knowledge bases,
    integrations, and runtime execution.
  version: 1.21.0
servers:
  - url: https://api-sandbox.featherhq.com
    description: Sandbox
  - url: http://localhost:8000
    description: Local dev
security: []
paths:
  /v1/v2/conversations/{conversation_id}/engineering/turns/{turn_id}:
    get:
      tags:
        - runtime v2
      summary: Get the reconstructed engineering waterfall for a single v2 turn
      description: >-
        Per-turn engineering waterfall, reconstructed from Langfuse (ENG-689
        T3).


        Replaces the retired self-hosted ``…/turns/{turn_id}/telemetry`` read.
        Returns the

        ``TurnState.to_telemetry_dict()`` artifact the rich waterfall UI already
        renders (full detail,

        PII-scrubbed per the org's config at emit time — ENG-686 T4).
      operationId: getV2ConversationEngineeringTurn
      parameters:
        - name: conversation_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            title: Conversation Id
        - name: turn_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            title: Turn Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TurnWaterfallResponse'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Authentication required
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Resource not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
        - APIKeyHeader: []
components:
  schemas:
    TurnWaterfallResponse:
      properties:
        turn_id:
          type: string
          format: uuid
          title: Turn Id
        conversation_id:
          type: string
          format: uuid
          title: Conversation Id
        trace:
          additionalProperties: true
          type: object
          title: Trace
      additionalProperties: false
      type: object
      required:
        - turn_id
        - conversation_id
        - trace
      title: TurnWaterfallResponse
      description: >-
        Full per-turn engineering waterfall, reconstructed from Langfuse
        (ENG-689 T3).


        ``trace`` is the ``TurnState.to_telemetry_dict()`` artifact the rich
        waterfall UI already

        renders (the live playground SSE stream emits the same shape). It is
        metadata-only at the

        production tier and carries the debug-tier fields when debug capture was
        on for the turn,

        mirroring the old self-hosted ``debug_log``.
    ErrorResponse:
      properties:
        error:
          type: string
          title: Error
        message:
          type: string
          title: Message
      type: object
      required:
        - error
        - message
      title: ErrorResponse
      description: Standard error response returned by all API error handlers.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: x-api-key

````