Spark — prototype, measure, decide

Use when Gera wants to TEST whether an idea or technique actually works — build a throwaway prototype, measure it, and get a decision-grade GO/NO-GO/PIVOT verdict, not a kept feature. Triggers — "spark this", "spike X", "prototype X to test it", "is X feasible", "does X actually work", "run an experiment on X", "POC X", "test if X beats Y", "/spark". The development half of the R&D loop (the build-and-prove sibling of /storm-research). Frames research into ranked testable experiments, builds the smallest disposable spike, routes it to the right measurer (/verify-loop, /eval, /prompt-eval), then converges the evidence into a verified HTML feasibility verdict (Codex-judged,…