release(crates): v0.91.0

[Boshen]

[0.91.0] - 2025-09-22

💥 BREAKING CHANGES

• 6fcb0d0 minifier: [BREAKING] Receive supported engines instead of ecmascript versions (fix(minifier)!: receive supported engines instead of ecmascript versions #13933) (sapphi-red)

🚀 Features

• 36bbba8 npm/runtime: Convert to ES modules (feat(npm/runtime): convert to ES modules #13874) (Boshen)
• d1a0d04 compat: Extract compatibility data to oxc_compat crate (feat(compat): extract compatibility data to oxc_compat crate #13932) (sapphi-red)
• b2b2037 minifier: Only apply arguments copy loop transformation in functions (feat(minifier): only apply arguments copy loop transformation in functions #13952) (sapphi-red)
• fa76365 minifier: Only apply arguments copy loop transformation in strict mode (feat(minifier): only apply arguments copy loop transformation in strict mode #13951) (sapphi-red)
• f8feed1 data_structures: Add advance_to_end method to SliceIter trait (feat(data_structures): add advance_to_end method to SliceIter trait #13947) (overlookmotel)
• a14aa79 npm/oxlint: Convert to ES modules (feat(npm/oxlint): convert to ES modules #13876) (Boshen)
• 638416e tasks/coverage: Add node compat table tests for minifier (feat(tasks/coverage): add node compat table tests for minifier #13925) (sapphi-red)

🐛 Bug Fixes

• 2a7d5d3 linter: Report correct diagnostic count on minified files (fix(linter): report correct diagnostic count on minified files #13896) (camc314)
• 8f3f460 codegen: Add missing dot when printing import.defer and import.source (fix(codegen): add missing dot when printing import.defer and import.source #13975) (Boshen)
• 0185984 napi/parser: Raw transfer preserveParens option apply to TSParenthesizedType (fix(napi/parser): raw transfer preserveParens option apply to TSParenthesizedType #13964) (overlookmotel)
• 5198a01 minifier: Handle proto when inlining single-use variables (fix(minifier): handle __proto__ when inlining single-use variables #13926) (sapphi-red)
• bd2fa90 napi/parser: Move browser.js file (fix(napi/parser): move browser.js file #13918) (overlookmotel)
• f067159 parser: Forbid readonly in parser instead of semantic (fix(parser): forbid readonly in parser instead of semantic #13905) (Ulrich Stark)
• 91c88e2 allocator: Fix lint warning building WASM (fix(allocator): fix lint warning building WASM #13897) (overlookmotel)
• 5ff91bc napi/parser: Fix example (fix(napi/parser): fix example #13887) (overlookmotel)
• 21bbf95 napi: Rebuild bindings file for NAPI packages (fix(napi): rebuild bindings file for NAPI packages #13889) (overlookmotel)

🚜 Refactor

• 48062d0 napi/parser: Itemize files in package.json (refactor(napi/parser): itemize files in package.json #13978) (overlookmotel)
• 329b7e7 napi/parser: Move scripts to scripts directory (refactor(napi/parser): move scripts to scripts directory #13900) (overlookmotel)
• ac3e9e9 napi/parser: Move JS code into src-js directory (refactor(napi/parser): move JS code into src-js directory #13899) (overlookmotel)
• 2cef8ec napi/parser: Remove outdated comment (refactor(napi/parser): remove outdated comment #13886) (overlookmotel)

📚 Documentation

• af8473a ast: Document JSDocUnknownType (docs(ast): document JSDocUnknownType #13973) (overlookmotel)
• 4817021 minifier: Clarify assumptions (docs(minifier): clarify assumptions #13950) (sapphi-red)
• f1862c4 minifier: Add comprehensive documentation for oxc_minifier (docs(minifier): add comprehensive documentation for oxc_minifier #13938) (Boshen)
• 7a50ad9 napi/parser, napi/transform: Correct README examples (docs(napi/parser, napi/transform): correct README examples #13934) (overlookmotel)

⚡ Performance

• ed8ff7d codegen: Unroll loop in SourcemapBuilder::update_generated_line_and_column (perf(codegen): unroll loop in SourcemapBuilder::update_generated_line_and_column #13903) (翠)
• 035ea19 parser: Optimize parse_simple_arrow_function_expression (perf(parser): optimize parse_simple_arrow_function_expression #13965) (Ulrich Stark)

🎨 Styling

• 830b733 ast: Remove trailing whitespace (style(ast): remove trailing whitespace #13963) (overlookmotel)

💼 Other

• fb347da crates: V0.91.0 (release(crates): v0.91.0 #13961) (Boshen)

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[github-actions]

Monitor Oxc

suite	result
(codegen)	❌
Isolated Declarations	❌
(formatter)	❌
(mangler)	❌
(compressor)	❌
(transformer)	❌
(whitespace)	❌
(dce)	❌

[Copilot]

Pull Request Overview

Release notes update for v0.91.0 across crates and npm packages, adding features, bug fixes, refactors, and documentation entries to each package CHANGELOG.

• Add 0.91.0 entries with noted breaking changes, features (e.g., ES modules conversion, compat crate), bug fixes, and performance improvements.
• Align package CHANGELOGs to the 2025-09-22 release date.

Reviewed Changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
npm/runtime/CHANGELOG.md	Add 0.91.0 entry noting ES module conversion and release meta.
npm/oxc-types/CHANGELOG.md	Add 0.91.0 entry with release meta.
napi/transform/CHANGELOG.md	Add 0.91.0 entries; contains duplicated 0.91.0 block.
napi/parser/CHANGELOG.md	Add 0.91.0 entries; contains duplicated 0.91.0 block.
napi/minify/CHANGELOG.md	Add 0.91.0 entries; contains duplicated 0.91.0 block.
crates/oxc_traverse/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_transformer_plugins/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_transformer/CHANGELOG.md	Add 0.91.0 features and release meta.
crates/oxc_syntax/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_span/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_semantic/CHANGELOG.md	Add 0.91.0 features, fixes, and release meta.
crates/oxc_regular_expression/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_parser/CHANGELOG.md	Add 0.91.0 features, fixes, perf, and release meta.
crates/oxc_napi/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_minifier/CHANGELOG.md	Add 0.91.0 breaking changes, features, fixes, docs, and release meta.
crates/oxc_mangler/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_isolated_declarations/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_estree/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_ecmascript/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_diagnostics/CHANGELOG.md	Add 0.91.0 features, fixes, and release meta.
crates/oxc_data_structures/CHANGELOG.md	Add 0.91.0 features and release meta.
crates/oxc_compat/CHANGELOG.md	Add 0.91.0 features and release meta.
crates/oxc_codegen/CHANGELOG.md	Add 0.91.0 fixes, perf, and release meta.
crates/oxc_cfg/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_ast_visit/CHANGELOG.md	Add 0.91.0 features and release meta.
crates/oxc_ast_macros/CHANGELOG.md	Add 0.91.0 entry with release meta.
crates/oxc_ast/CHANGELOG.md	Add 0.91.0 features, fixes, docs, styling, and release meta.
crates/oxc_allocator/CHANGELOG.md	Add 0.91.0 features, fixes, and release meta.
crates/oxc/CHANGELOG.md	Add 0.91.0 entry with release meta.

---

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[Copilot]

There are two identical 0.91.0 sections dated 2025-09-22. Remove one to avoid duplication and keep a single authoritative entry for that date.

Suggested change

	## [0.91.0] - 2025-09-22
	### 💥 BREAKING CHANGES
	- 6fcb0d0 minifier: [**BREAKING**] Receive supported engines instead of ecmascript versions (#13933) (sapphi-red)
	### 🐛 Bug Fixes
	- 21bbf95 napi: Rebuild bindings file for NAPI packages (#13889) (overlookmotel)
	### 💼 Other
	- fb347da crates: V0.91.0 (#13961) (Boshen)