State-of-the-art Ruby engineering rules (2026 baseline, Ruby 3.4+ / 4.0) that Claude applies when writing or auditing Ruby. Covers modern idioms (frozen string literals, pattern matching, Data/Struct, RBS/Sorbet/Steep typing), security (SQL injection via ActiveRecord/Sequel, ERB/XSS escaping, mass a
State-of-the-art Ruby engineering rules (2026 baseline, Ruby 3.4+ / 4.0) that Claude applies when writing or auditing Ruby. Covers modern idioms (frozen string literals, pattern matching, Data/Struct, RBS/Sorbet/Steep typing), security (SQL injection via ActiveRecord/Sequel, ERB/XSS escaping, mass assignment, CSRF, Marshal/YAML deserialization, command injection, ReDoS), framework-neutral web hard