Plan Eng Review

Locks in your architecture and implementation plan before you start coding. It walks through data flow, edge cases, test coverage, and performance concerns interactively, with opinionated recommendations from an engineering manager perspective. Triggered by phrases like "review the architecture" or "check the implementation plan," and it's designed to catch design problems before they become code problems. The skill runs a preamble that checks your git branch, loads project learnings if you have them, and sets up session tracking. It's part of the gstack toolkit and works best when you have a design doc ready but haven't written the first line of implementation yet. Think of it as a structured preflight checklist that asks the hard questions while changes are still cheap.