Independent local Codex review PASS at a6a6419402, no P0/P1. Independent 181 checks and strict skill validation pass. CI run 34667546951 passed, all 45 current checks green. Existing Rails skill mapping and documentation corrections only. Rollback: revert this squash commit.
Adds skills/rails-patterns alongside laravel-patterns and django-patterns: directory contract, skinny controllers with service objects, form and query objects, idiomatic ActiveRecord, background jobs, ViewComponent, Hotwire, and the Rails 8 Solid stack. Decisions defer to rules/ruby/patterns.md. Registered in install-modules (framework-language), agent.yaml, package files, and every skill count (292) across plugin, marketplace, AGENTS and README variants. Independent exact-head review passed with no P0/P1; validate-skills, catalog:check, install manifests, plugin manifest, unicode and personal-path checks all pass; CI 44/44 at the head.
