- Added new linting rules: symbol description rule, class‑methods‑use‑this rule, and updated cache handling to keep non‑visited files.
- Extended language support and options with ecmaVersion 20xx, a never option for multiline ternary, and requireStringLiterals for typeof checks.
- Implemented numerous bug fixes and documentation updates, including a JSCS migration guide, consistent rule description casing, and a revised semantic‑versioning policy.