What problem does it solve? Engineers working on the Zeus React Native Bitcoin/Lightning wallet often jump from a hunch to a fix without proving the root cause, leading to regressions across 7 node backends and 2 mobile platforms. This Skill enforces a disciplined evidence bar, experiment design, and retirement process so changes are accepted or abandoned with a documented trail. ## Core Features & Use Cases - Evidence Bar Enforcement: Requires one mechanism explaining all observations (including negatives), pre-registered predictions with numeric thresholds, and adversarial refutation by an assigned reviewer before any fix is accepted. - Feature Lifecycle Guidance: Documents the observed idea → default-off flag → default-on → MOD_KEY migration → deprecated-but-retired lifecycle, with worked examples like bimodalPathfinding and lsps1ShowPurchaseButton. - Templates & Checklists: Provides a copy-paste hypothesis/experiment/refutation template, a promotion checklist, and a dead-end archaeology format for documenting abandoned investigations. - Use Case: You suspect the in-flight request dedup cache causes a bug. The Skill walks you through writing predictions before testing, refuting across backends and upgrade paths, and recording the refutation attempts in your PR. ## Quick Start Ask the assistant to apply the Zeus research methodology to structure a hypothesis and experiment plan for the bug you are investigating before writing any fix.
