io.atcr.hold.initiateUpload

{
  "id": "io.atcr.hold.initiateUpload",
  "defs": {
    "main": {
      "type": "procedure",
      "input": {
        "schema": {
          "type": "object",
          "required": [
            "digest"
          ],
          "properties": {
            "digest": {
              "type": "string",
              "maxLength": 128,
              "description": "The blob digest (e.g., sha256:abc123...)"
            }
          }
        },
        "encoding": "application/json"
      },
      "errors": [
        {
          "name": "InvalidDigest"
        }
      ],
      "output": {
        "schema": {
          "type": "object",
          "required": [
            "uploadId"
          ],
          "properties": {
            "uploadId": {
              "type": "string",
              "maxLength": 256,
              "description": "Unique identifier for this upload session"
            }
          }
        },
        "encoding": "application/json"
      },
      "description": "Start a new multipart upload session for an OCI blob. Returns an uploadId to be used with subsequent part upload and completion endpoints."
    }
  },
  "$type": "com.atproto.lexicon.schema",
  "lexicon": 1
}