{
  "lexicon": 1,
  "id": "sh.tangled.repo.getDefaultBranch",
  "defs": {
    "main": {
      "type": "query",
      "parameters": {
        "type": "params",
        "required": ["repo"],
        "properties": {
          "repo": {
            "type": "string",
            "description": "Repository identifier in format 'did:plc:.../repoName'"
          }
        }
      },
      "output": {
        "encoding": "application/json",
        "schema": {
          "type": "object",
          "required": ["name", "hash", "when"],
          "properties": {
            "name": {
              "type": "string",
              "description": "Default branch name"
            },
            "hash": {
              "type": "string",
              "description": "Latest commit hash on default branch"
            },
            "shortHash": {
              "type": "string",
              "description": "Short commit hash"
            },
            "when": {
              "type": "string",
              "format": "datetime",
              "description": "Timestamp of latest commit"
            },
            "message": {
              "type": "string",
              "description": "Latest commit message"
            },
            "author": {
              "type": "ref",
              "ref": "#signature"
            }
          }
        }
      },
      "errors": [
        {
          "name": "RepoNotFound",
          "description": "Repository not found or access denied"
        },
        {
          "name": "InvalidRequest",
          "description": "Invalid request parameters"
        }
      ]
    },
    "signature": {
      "type": "object",
      "required": ["name", "email", "when"],
      "properties": {
        "name": {
          "type": "string",
          "description": "Author name"
        },
        "email": {
          "type": "string",
          "description": "Author email"
        },
        "when": {
          "type": "string",
          "format": "datetime",
          "description": "Author timestamp"
        }
      }
    }
  }
}