{
  "contract": "kaldenframe.target-blind-feature-freeze.v1",
  "freeze_id": "retention_features_pre_target_v1",
  "schema": {
    "path": "column-schema.json",
    "format": "kaldenframe.column-schema.v1"
  },
  "boundaries": {
    "target_names": ["retained_90d"],
    "identity_names": ["account_id"],
    "time_names": ["snapshot_time"]
  },
  "selection_policy": {
    "allowed_types": ["boolean", "integer", "number", "category"],
    "include_patterns": ["^(support_|active_|plan_)"],
    "exclude_patterns": ["(_after_|future|outcome|target|label)"],
    "forbidden_exact_names": ["retained_90d"],
    "min_selected": 2,
    "max_selected": 25
  },
  "limits": {
    "max_schema_bytes": 262144,
    "max_columns": 1000,
    "max_patterns": 100,
    "max_name_chars": 128
  }
}