- Added new linting capabilities: ENV‑based ESLint flags, external MCP server, `allowRegexCharacters`, `no-unassigned-vars`, autofix for array constructor, and TypeScript syntax support in `max-params`.
- Fixed various type definition and rule handling bugs, including mismatched rule removals, parser option typings, and source‑code class definitions.
- Updated documentation (README, editor integrations, frozen‑rule notes) and performed routine dependency upgrades and other chores.
v9.27.0
Official ESLint changelog summary with source attribution, release tags, and community reactions.
Track this ESLint release note alongside related changelog updates, risky changes, and weekly digest signals from the developer community.
Verify the original release note
Every summary should remain traceable to the original changelog or release source.
Follow this in context
Turn this ESLint release note into a weekly digest for the tools you actually use.
Create digestMore ESLint changelog updates
Added handling for underflow without loss of precision and introduced checkConditionalExpressions to avoid unmodified loop conditions.
Fixed ASI hazard handling and false positives in various linting rules (e.g., no unused labels, getters, and unused vars).
Export ConfigObject from eslint/config to enable external usage.