{
  "lexicon": 1,
  "id": "app.bsky.video.uploadPart",
  "defs": {
    "main": {
      "type": "procedure",
      "description": "Upload one part. Parts are idempotent and may be retried or re-sent while the session is created. Each expected length is derived from the upload size and part size, and Content-Length must match exactly. ETags are never exposed to clients.",
      "parameters": {
        "type": "params",
        "required": ["jobId", "partNumber"],
        "properties": {
          "jobId": { "type": "string", "minLength": 1, "maxLength": 256 },
          "partNumber": { "type": "integer", "minimum": 1 }
        }
      },
      "input": {
        "encoding": "application/octet-stream"
      },
      "output": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["partNumber", "sizeBytes"],
          "properties": {
            "partNumber": { "type": "integer", "minimum": 1 },
            "sizeBytes": { "type": "integer" }
          }
        }
      },
      "errors": [
        {
          "name": "UploadNotFound",
          "description": "The job ID is unknown or aged out of retention; known terminal sessions are never reported as not found."
        },
        {
          "name": "UploadExpired",
          "description": "The upload session expired before completion."
        },
        {
          "name": "InvalidPartNumber",
          "description": "The part number is outside the upload's valid part range."
        },
        {
          "name": "PartSizeMismatch",
          "description": "Content-Length does not exactly match the expected size for this part."
        },
        {
          "name": "UploadNotReady",
          "description": "A finish is in progress; check getUploadStatus and retry."
        },
        {
          "name": "UploadFailed",
          "description": "The session is known to have failed; the error carries its failure reason."
        },
        {
          "name": "UploadAborted",
          "description": "The session is known to have been aborted."
        },
        {
          "name": "UploadAlreadyCompleted",
          "description": "The session is known to have already completed."
        },
        {
          "name": "ServiceOverloaded",
          "description": "The service is draining or temporarily at capacity; retry on another worker."
        }
      ]
    }
  }
}