# What changed in oxc-parser

> 4 changes in oxc-parser 0.152 to 0.154 from its official release notes, upgrade guides and advisories: 2 breaking. Each one cited. Sources checked 2026-10-19. HTML: https://unstale.sh/npm/oxc-parser/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## oxc-parser 0.154

### Breaking changes

- Comment attachment storage was added and refactored in a breaking change, affecting developers who use the AST. (0.154.0) — [release notes](https://github.com/oxc-project/oxc/blob/d47efe5cb875e118e845ee6eda15d205ce3b566d/napi/parser/CHANGELOG.md#01540---2026-10-13)

## oxc-parser 0.153

### Breaking changes

- The parser rejects module syntax in script mode. (0.153.0) — [release notes](https://github.com/oxc-project/oxc/blob/d47efe5cb875e118e845ee6eda15d205ce3b566d/napi/parser/CHANGELOG.md#01530---2026-10-05)

## oxc-parser 0.152

### Tooling

- Threadless WASI builds are available for developers targeting WASI. (0.152.0) — [release notes](https://github.com/oxc-project/oxc/blob/d47efe5cb875e118e845ee6eda15d205ce3b566d/napi/parser/CHANGELOG.md#01520---2026-09-28)

### Fixes and other changes

- The parser now handles HTML comment values. (0.152.0) — [release notes](https://github.com/oxc-project/oxc/blob/d47efe5cb875e118e845ee6eda15d205ce3b566d/napi/parser/CHANGELOG.md#01520---2026-09-28)