Use when implementing any feature or bugfix, before writing implementation code - write the test first, watch it fail, write minimal code to pass; ensures tests actually verify behavior by requiring failure first
/plugin marketplace add samjhecht/wrangler/plugin install wrangler@samjhecht-pluginsThis skill inherits all available tools. When active, it can use any tool Claude has access to.
Build robust backtesting systems for trading strategies with proper handling of look-ahead bias, survivorship bias, and transaction costs. Use when developing trading algorithms, validating strategies, or building backtesting infrastructure.