runtime-regression-debugger

Use when Veteran Engineering Studio needs its primary full-stack owner for substantial software work with end-to-end product and engineering responsibility: repository takeover; feature delivery; mixed frontend/backend/data/auth/jobs/runtime/infrastructure changes; debugging/regressions; refactors or migrations; architecture; code review; performance; incidents; release/operations; cross-repo/monorepo work; and user-facing implementation that must integrate with real product/runtime behavior. Keep this Skill primary for whole-product or cross-layer outcomes and delegate a bounded UI/frontend phase to the sibling frontend-design-builder when visual design is material. Do not use for general software explanations, isolated syntax questions, tiny edits, or pure visual brainstorming/moodboards/screenshot critique with no repository/runtime engineering.