{
  "id": "interactive-labs",
  "name": "Interactive JEV Labs",
  "description": "A lesson in typed judgments and code-owned branching.",
  "input_schema": {
    "scenario": {
      "type": "string",
      "required": true,
      "minLength": 5,
      "maxLength": 1800
    },
    "learner_goal": {
      "type": "string",
      "maxLength": 500
    }
  },
  "limits": {
    "maxSteps": 8,
    "maxJevCalls": 1,
    "maxInputTokens": 3000
  },
  "start": "judge",
  "nodes": {
    "judge": {
      "type": "jev.ask",
      "state": {
        "scenario": "{{input.scenario}}",
        "learner_goal": "{{input.learner_goal}}"
      },
      "questions": {
        "activity": {
          "type": "choice",
          "instructions": "Which exercise is described? Choose unclear if not identified.",
          "criteria": {
            "classification": "Choose among categories.",
            "ranking": "Order candidates by a criterion.",
            "unclear": "Activity is not sufficiently described."
          }
        },
        "criterion_present": {
          "type": "noul",
          "instructions": "Does input explicitly state the criterion guiding the exercise?"
        }
      },
      "next": "gate"
    },
    "gate": {
      "type": "flow.if",
      "when": "{{judge.valores.criterion_present}} >= 0.75",
      "onInvalid": "else",
      "then": "route",
      "else": "clarify"
    },
    "route": {
      "type": "flow.switch",
      "on": "{{judge.valores.activity}}",
      "onInvalid": "default",
      "cases": {
        "classification": "classification_log",
        "ranking": "ranking_log",
        "_default": "clarify"
      }
    },
    "classification_log": {
      "type": "action.log",
      "texto": "Draft lab: classification exercise; no external effect."
    },
    "ranking_log": {
      "type": "action.log",
      "texto": "Draft lab: ranking exercise; no external effect."
    },
    "clarify": {
      "type": "action.log",
      "texto": "Draft lab: ask for a clearer criterion."
    }
  },
  "fixtures": [
    {
      "id": "synthetic-lab",
      "input": {
        "scenario": "Example: classify support tickets by team.",
        "learner_goal": "Use message text only."
      },
      "answers": {
        "activity": "classification",
        "criterion_present": 0.9
      }
    }
  ]
}