{
  "contract_id": "f8-c07-experiment-contract",
  "versión": "2026-06-07",
  "owner": "equipo-datos-ia",
  "unit": "unit_id",
  "expected_allocation": {
    "control": 0.5,
    "treatment": 0.5
  },
  "required_columns": [
    "unit_id",
    "variant",
    "segment",
    "pre_week_tasks",
    "historical_resolution_rate",
    "resolved",
    "minutes_to_resolution",
    "cost_eur",
    "latency_ms",
    "negative_feedback"
  ],
  "allowed_variants": ["control", "treatment"],
  "allowed_segments": ["matricula", "becas", "practicas"],
  "primary_metric": {
    "name": "resolved",
    "direction": "higher_is_better",
    "minimum_effect": 0.05,
    "minimum_n_per_variant": 10,
    "baseline_rate": 0.58
  },
  "statistical_plan": {
    "alpha": 0.05,
    "power": 0.8,
    "minimum_detectable_effect": 0.05,
    "planned_looks": 1,
    "sequential_testing_enabled": false,
    "peeking_policy": "No mirar para decidir antes de cerrar la ventana planificada."
  },
  "assignment_contract": {
    "flag_key": "support_template_guided_reply",
    "targeting_key": "unit_id",
    "assignment_unit": "ticket",
    "requires_persistent_assignment": true,
    "requires_exposure_event": true,
    "exposure_event_name": "experiment_exposure",
    "aa_test_required_before_ab": true
  },
  "rollout_policy": {
    "initial_ramp_percent": 5,
    "ramp_steps_percent": [5, 25, 50, 100],
    "rollback_if_guardrail_blocks": true,
    "publish_requires_status": "pass"
  },
  "guardrails": {
    "max_negative_feedback_rate_delta": 0.05,
    "max_latency_mean_delta_ms": 110,
    "max_cost_mean_delta_eur": 0.35
  },
  "quality_gates": {
    "max_abs_standardized_mean_difference": 0.25,
    "srm_p_value_block_threshold": 0.001
  },
  "slices": ["segment"]
}