Authoritative protocol defining the "Pre-Execution Reflection Gate". Mandates architectural validation, negative ROI calculation, and duplicate sweeps before an agent is permitted to begin working on a GitHub Issue. Triggers: Use this skill immediately when assigned a ticket whose authoring you did NOT see, before checking out a branch or writing any codebase modifications. A ticket YOU authored this session is exempt; one you authored in an earlier session runs a cheap drift probe instead — never an exemption you judge for yourself.