Slate AR Gate

Handle $ARGUMENTS by loading slate-ar and running a measured gate loop.

Use this when the question is: "Can this existing proof surface pass repeatably, and what does the failure evidence say?"

It is valid for full editor behavior testing: navigation, typing, selection, clipboard, IME, focus, undo/redo, browser routes, package tests, bun check, and focused Playwright suites. The catch: the gate command must already exist or be obvious.

Boundary