SOTA Ruby (2026)

Expert-level rules for producing and auditing production Ruby. Baseline language line: Ruby 3.4+, with Ruby 4.0 (released 2025-12-25) as the latest major line. Per the official branches page: 4.0 and 3.4 are in normal maintenance; 3.3 is security-maintenance only (expected EOL 2027-03); 3.2 and older are EOL (3.2 since 2026-04-01) — running them is itself a finding. Feature notes: Data.define and Regexp.timeout from 3.2, it block parameter and chilled-string warnings from 3.4, Ractor::Port and experimental ZJIT from 4.0 — noted where relevant. Every rules file ends with an audit checklist of grep/lint patterns.

Purpose

Two consumers, one source of truth: