{
  "schema_version": "1.0",
  "topic_id": "D06-F03-A11",
  "title": "Matching Low",
  "purpose": "machine-readable publication-contract verification",
  "data_class": "synthetic teaching input",
  "selected_formula": "close_1 < open_1; close_2 <= open_2; abs(close_2-close_1) <= tick_tolerance",
  "canonical_question": "Do two bearish candles finish at effectively the same low close?",
  "input_contract": "two consecutive closed OHLC candles, tick size, declared gap rules, and causal prior context",
  "scenario_assertions": [
    {
      "name": "canonical",
      "expected_state": "calculated",
      "assertion": "valid and sufficiently warm synthetic input reaches calculation"
    },
    {
      "name": "boundary",
      "expected_state": "waiting",
      "assertion": "one missing observation or unresolved equality is not coerced to zero"
    },
    {
      "name": "failure",
      "expected_state": "invalid",
      "assertion": "non-finite, misordered, future-dated, or basis-mixed input is withheld"
    }
  ],
  "timing_rule": "The label becomes available only after the final candle in the selected pattern has closed; prior-trend context must use observations available before that close.",
  "expected_non_claims": [
    "not historical market data",
    "not a forecast",
    "not a trading instruction",
    "not evidence of profitability"
  ],
  "implementation_status": "Python canonical runtime and audited Node/TypeScript adapter released with topic-owned fixtures and tests"
}