assay_reproduce

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Use this when someone hands you a claimed track record and you want to recompute it yourself from the fills and candles -- an arithmetic audit of the numbers, not buy/sell advice. Independently recompute a claimed track record -- audit the arithmetic, not the story. New audit object: not the signal, the CALLER'S CALCULATION. Send the trades (entry/exit time, price, side), the candles they were filled on, and the claimed headline metrics (total_return_pct, win_rate, max_drawdown_pct, n_trades, sharpe_annualized); the engine rebuilds the equity book independently and grades the claim against disclosed per-metric tolerances (published cross-engine divergence reaches 3.71%, so the band is explicit output, never a hidden judgment). Checks every fill against its bar's [low, high] (a fill outside the range was never physically available: FILL_OUTSIDE_BAR_RANGE), prices formally undecidable stop/limit exits worst-case -- both bracket levels inside one OHLC bar cannot be ordered (Maier-Paape/Platen) -- and reports that fill-ambiguity haircut (FILL_AMBIGUITY_MATERIAL when worst-case pricing flips the book's sign). Also returns an implementation-uncertainty interval: every fill pushed to the best and worst end of its bar, the spread a legitimate re-implementation could produce; a claim outside EVERY convention earns RESULT_NOT_REPRODUCED. Demote-only: 'reproduced' means the numbers follow from the fills -- it is NOT evidence of an edge and never endorses a strategy. Code-computed; no ledger write (auditing arithmetic is not a new trial). Timestamps must carry explicit timezones; structurally invalid input is refunded. NOT financial advice. Price: per check; see https://api.alphaassay.com/v1/meta/pricing (api_key required -- account setup at https://api.alphaassay.com/account).