Nick2bad4u/eslint-plugin-typefest v1.2.8

on GitHub

[1.2.8] - 2026-05-16

• Commit Range: ➡️ 37c0624...7d4fde2

✨ Features

• 646b362 — ✨ [feat] Adds safe TypeFest gap-coverage rules

✨ [feat] Adds a new set of high-confidence autofix rules for common manual type patterns

• Covers boolean pair helpers, unknown and tuple guards, nullable checks, rest-element extraction, and key presence and key extraction helpers

• Favors dedicated utilities so type intent reads more clearly and repeated low-level helper compositions disappear from user code

• Limits reporting to exact import-aware shapes so fixes stay low-noise and avoid semantic drift

🚜 [refactor] Extracts shared pattern matchers and rule factories for the new rule family

• Reuses conditional-type, tuple, and key-analysis logic to keep behavior consistent across related rules

• Improves maintainability for future rule additions without widening match scope

📝 [docs] Updates rule coverage guidance and preset documentation

• Marks the gap-analysis pass as effectively closed after landing the safe default candidates

• Documents the narrow supported patterns and non-goals so future additions require stronger proof before joining default presets

🧪 [test] Expands contract, parse-safety, autofix, and snapshot coverage

• Verifies import handling, shadowing, namespace usage, fixer output, preset membership, and exported rule counts for the new rule set

• 1c90fb9 — ✨ [feat] (rules) Introduce new TypeFest rules for array and entry types

• Add prefer-type-fest-array-element rule to enforce usage of ArrayElement<T> over T[number] for array and tuple element extraction.

• Add prefer-type-fest-array-values rule to enforce usage of ArrayValues<T> over typeof values[number] for constant array value extraction.

• Add prefer-type-fest-entries rule to enforce usage of Entries<T> over manual arrays of [keyof T, T[keyof T]] for object entry tuples.

• Add prefer-type-fest-entry rule to enforce usage of Entry<T> over manual [keyof T, T[keyof T]] object entry tuple types.

• Update rule metadata snapshots to include new rules with appropriate documentation links and configurations.

• Add tests for new rules to ensure correct behavior and parse safety.

• Update existing tests to defer to new rules where applicable.

• 3cdbfd3 — ✨ [feat] Add new TypeFest rules for TypeScript type checks

• Introduced prefer-type-fest-is-any, prefer-type-fest-is-never, prefer-type-fest-is-null, and prefer-type-fest-is-undefined rules to enforce best practices in TypeScript type checks.

• Updated snapshots and metadata for the new rules to ensure proper documentation and functionality.
  🧪 [test] Add comprehensive tests for new TypeFest rules

• Created tests for prefer-type-fest-is-any, prefer-type-fest-is-never, prefer-type-fest-is-null, and prefer-type-fest-is-undefined to validate their behavior and ensure they catch incorrect type checks.

• Included parse-safety guards in tests to ensure generated code remains valid TypeScript.
  📝 [docs] Update documentation for new TypeFest rules

• Added documentation entries for the new rules in the README and snapshots to provide users with guidance on usage and configuration.

• f77a049 — ✨ [feat] Add Codex instructions for ESLint plugin source structure

• Introduce guidelines for authoring rules and source modules in the ESLint plugin template.

• Define source layout and canonical rule template expectations.

• Specify required rule metadata and implementation expectations.

• Outline new rule workflow and common pitfalls to avoid in the src/ directory.
  🧹 [chore] Remove unused bootstrap-labels script

• Delete the obsolete PowerShell script for managing GitHub labels.

• Clean up the repository by removing unnecessary files. [ci skip]

• 37c0624 — ✨ [feat] Add benchmark and script guidelines documentation

• 📝 Create AGENTS.md for benchmark folder guidelines

• 📝 Create AGENTS.md for scripts folder guidelines

• 🔧 Update .remarkignore to include AGENTS.md files

• 🚜 Refactor vitest configuration to improve exclusion patterns

🧹 Chores

• 7d4fde2 — Release v1.2.8