Repo Quality Rails Setup

This skill sets up deterministic, ungameable quality infrastructure that prevents broken code from advancing through any stage of the development pipeline. The philosophy: every quality check is a hard gate that blocks forward progress when violated. Warnings are for things humans should notice; errors are for things the system must enforce.

How This Skill Works

Entry Check: Existing Setup (Sentinel)

Before doing anything, check for an existing repo-quality-rails marker. This prevents re-running setup and burning context on a repo that is already configured.

Sentinel markers (check in order, stop at first match):