Ruby on Rails Dev

Stop: read $dev Shared prep before any delta.

Purpose and Routing

• Overlay loaded via $dev with $ruby-dev; keep Ruby-general workflow in $ruby-dev and shared classify / one-surface / design / API truth / compat / git safety in $dev.
• Apply to controllers, routes, models, services, policies, serializers, workers/mailers/jobs, migrations, framework config loaders, cache-key composition, and encryption cutovers.
• Follow AGENTS.md routing and precedence.
• Require $review.gil security when authn/authz, tenancy, PII/PHI, secrets, exports, webhooks, raw SQL, or privileged ops are in scope.
• Design or private-seam cases → $dev → $ruby-dev → architecture. Do not invent adapter or regex craft here.

Implementation Deltas