manifoldbt Backtester Skill Purpose Execute what teaches. That skill grades a backtest on five dimensions, and its prerequisites say "metrics are user-provided": it scores numbers it never produces. This skill produces them. It runs a strategy over real bars and returns the eight inputs its evaluator asks for. The two chain in one direction: spec, run, evaluate. When to Use This Skill - A user describes a rule and wants it measured - is about to run and the numbers do not exist yet - A win rate, average winner, average loser or drawdown must come from bars - A strategy's parameter count must…