{
  "name": "eval",
  "description": "Executes a lambda block; use it to run a node tree dynamically or to scope a group of statements",
  "signature": {
    "input": {
      "kind": "lambda-object,lambda-tree",
      "description": "Expression selecting the Hyperlambda nodes to evaluate; alternatively supply literal executable children",
      "required": false,
      "mode": "Expression"
    },
    "children": {
      "*": {
        "type": "lambda",
        "description": "Executable child slot evaluated in order",
        "required": false,
        "mode": "ExecutableLambda",
        "cardinality": "ZeroOrMore",
        "role": "ExecutableBody",
        "evaluation": "EvalSelf",
        "projection": "Self"
      }
    }
  }
}