# Oxc apps_v1.74.0 — oxlint v1.74.0 & oxfmt v0.59.0

- Product: Oxc (https://whatsnew.fyi/product/oxc)
- Vendor: Oxc
- Date: 2026-07-14
- Version: apps_v1.74.0
- Original notes: https://github.com/oxc-project/oxc/releases/tag/apps_v1.74.0
- Permalink: https://whatsnew.fyi/product/oxc/releases/apps-v1.74.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Add `namespaces` option to linter/eslint/no-inner-declarations
- **added** — Auto-discover `.mts` config files
- **added** — Add autofix logic to linter/import/no-duplicates
- **added** — Support `quoteProps` for TS enum and methods
- **added** — Expose `SourceText::as_str()`
- **changed** — Update oxc-css-parser to 0.0.7
- **changed** — Format Less :extend and merge props
- **fixed** — Avoid duplicate commas when merging imports in linter/import/no-duplicates
- **fixed** — Preserve type modifiers when merging imports
- **fixed** — Skip fix for `TSPropertySignature` keys in linter/unicorn/prefer-string-raw
- **fixed** — Skip suppression validation with `--type-check-only`
- **fixed** — Fix false positive in linter/jest/prefer-lowercase-title when `lowercaseFirstCharacterOnly` is false
- **fixed** — Allow `vite-plus/test` and `@effect` as Vitest source
- **fixed** — Error on `ignorePatterns` that cannot match files outside the config directory
- **fixed** — Resolve `ignorePatterns` relative to the config dir
- **fixed** — Do not error on catch variables in linter/eslint/no-loop-func
- **fixed** — Count default parameter updates as usage in linter/eslint/no-unused-vars
- **fixed** — Detect Junie agent env vars
- **fixed** — Handle `break` in switch statements correctly in linter/eslint/no-unreachable

##### Table of Contents

- [Oxlint v1.74.0](#oxlint-v1.74.0)
- [Oxfmt v0.59.0](#oxfmt-v0.59.0)

##### Oxlint v1.74.0
###### 🚀 Features

- 0433a83 linter/eslint/no-inner-declarations: Add `namespaces` option (#24044) (Boshen)
- 92f154a oxlint,oxfmt: Auto-discover `.mts` config files (#24357) (camc314)
- 8c1d74b linter/import/no-duplicates: Add autofix logic (#24273) (Cole Ellison)

###### 🐛 Bug Fixes

- ac7176d linter/import/no-duplicates: Avoid duplicate commas when merging imports (#24467) (camc314)
- 261aa39 linter/import/no-duplicates: Preserve type modifiers when merging imports (#24466) (camc314)
- dbd08b6 linter/unicorn/prefer-string-raw: Skip fix for `TSPropertySignature` keys (#24465) (camc314)
- df67932 linter: Skip suppression validation with `--type-check-only` (#24462) (Stephen Zhou)
- 0b086de linter/jest/prefer-lowercase-title: False positive when `lowercaseFirstCharacterOnly` is false (#24414) (Connor Shea)
- 097cb95 linter: Allow `vite-plus/test` and `@effect as Vitest source (#24196) (Liang)
- 8337835 linter: Error on `ignorePatterns` that cannot match files aoutside the config directory (#24341) (leaysgur)
- 9ba30e5 linter/oxc/bad-replace-all-arg: Add note to enhance diagnostic (#24346) (camc314)
- 2ce5a33 linter: Resolve `ignorePatterns` relative to the config dir (#24339) (leaysgur)
- ab90eed linter/eslint/no-loop-func: Do not error on catch variables (#24316) (Chris Opperwall)
- b67f0a6 linter/eslint/no-unused-vars: Count default parameter updates as usage (#24323) (camc314)
- d193f8e linter: Detect Junie agent env vars (#24277) (Jeevan Mohan Pawar)
- 2aecf60 linter/eslint/no-unreachable: Handle `break` in switch stmts correctly (#24260) (camc314)

###### ⚡ Performance

- 2efa2f9 linter/react/jsx-handler-names: Simplify JSX handler name normalization (#24458) (camc314)
- 9c4e24a linter/eslint/object-shorthand: Remove constructor regex (#24457) (camc314)
- 7f80cac linter/vue/prop-name-casing: Precompile `ignoreProps` regex pattern (#24413) (connorshea)
- 6272051 linter/typescript/no-require-imports: Compile allow patterns once (#24417) (connorshea)
- fb1edf1 linter: Compute comment fix span only for directive comments (#24419) (connorshea)
- 33805b9 linter/jsdoc/require-param: Compile checkTypesPattern regex once (#24420) (connorshea)
- 8de6fca linter/jest/valid-title: Compile disallowedWords regex once (#24412) (Connor Shea)
- 4a0d8dc linter/eslint/no-underscore-dangle: Avoid String clone per identifier (#24371) (Ian Macalinao)
- f3ab04c linter/typescript/consistent-type-imports: Remove redundant Vec per violation (#24370) (Ian Macalinao)
- 4d2d78d linter/typescript/prefer-ts-expect-error: Avoid String clone per comment (#24369) (Ian Macalinao)

##### Oxfmt v0.59.0
###### 🚀 Features

- 3a7fe74 formatter_css: Update oxc-css-parser to 0.0.7 (#24434) (leaysgur)
- 0173cd3 formatter_css: Format Less :extend and merge props (#24358) (leaysgur)
- 92f154a oxlint,oxfmt: Auto-discover `.mts` config files (#24357) (camc314)
- df250df formatter: Support `quoteProps` for TS enum and methods (#24309) (leaysgur)
- a9a5cd6 formatter_core: Expose `SourceText::as_str()` (#24281) (leaysgur)

###### 🐛 Bug Fixes

- 95262b9 formatter_css: Keep more value comments before comma (#24487) (leaysgur)
- cd53d98 formatter_css: Keep value comments before comma (#24484) (leaysgur)
- 27f57d8 formatter: Type alias comment idempotency (#24483) (leaysgur)
- b7b82e0 formatter: Suppressed trailing semi (#24482) (leaysgur)
- 162bddf formatter: Add required parens for conditional type in type parameter constraint (#24450) (leaysgur)
- 2d22a91 formatter: Determine type cast target from span instead of lexical scan (#24447) (leaysgur)
- 25306e9 formatter: Do not add extra parens with type cast comment (#24444) (leaysgur)
- bd6edfe formatter: Break arrow signature that exactly fills the line when cond body may hug (#24440) (leaysgur)
- a99ef41 formatter: Keep quotes on method signature named new (#24432) (leaysgur)
- fcc28df formatter_css: Keep

_[Truncated at 4000 characters — full notes: https://github.com/oxc-project/oxc/releases/tag/apps_v1.74.0]_