# Get operation assignment history

Returns the assignment version history for a specific operation.

        Shows all historical assignment states with timestamps, who made
        the assignment, and field-level diffs between versions.

        If X-Workspace-Id header is provided, includes workspace draft
        assignments merged with mainline history. Workspace drafts appear
        alongside mainline assignments (not replacing them).

Endpoint: GET /v1/operations/{operation_id}/assignments/history/
Version: 1.0.0
Security: tokenAuth

## Header parameters:

  - `X-Workspace-Id` (string)
    Optional workspace UUID to include draft assignments

## Query parameters:

  - `include_diffs` (boolean)
    Include field-level diffs (default true)

  - `limit` (integer)
    Maximum number of versions to return (default 50, max 200)

  - `offset` (integer)
    Pagination offset

## Path parameters:

  - `operation_id` (string, required)
    UUID of the operation

## Response 200 fields (application/json):

  - `operationId` (string, required)

  - `workspace` (string,null, required)

  - `total` (integer, required)

  - `versions` (array, required)

  - `versions.assignmentId` (string, required)

  - `versions.validFrom` (string, required)

  - `versions.validTo` (string,null, required)

  - `versions.changeId` (string,null, required)

  - `versions.closedByChangeId` (string,null)

  - `versions.changeType` (string, required)
    * created - created
* updated - updated
* deleted - deleted
    Enum: "created", "updated", "deleted"

  - `versions.source` (string, required)
    * mainline - mainline
* workspace - workspace
    Enum: "mainline", "workspace"

  - `versions.assignedBy` (any, required)

  - `versions.tombstone` (boolean, required)

  - `versions.before` (any, required)

  - `versions.after` (any, required)

  - `versions.changes` (array, required)

  - `versions.changes.field` (string, required)

## Response 400 fields (application/json):

  - `detail` (string, required)

## Response 404 fields (application/json):

  - `detail` (string, required)

## Response 500 fields (application/json):

  - `detail` (string, required)


## Response 401 fields

## Response 403 fields