Impact Score: 5/10
Bun v0.6.6
Source available — automated, not human-reviewed
Component: bun · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
Bun bun-v0.6.6. Source highlight: **Read Bun v0.6.6's release notes on Bun's blog**
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
✨ New Features & Capabilities (1)
- Add macro docs
⚡ Performance & Enhancements (1)
- Small improvements to `bun test`
🔧 Bug Fixes & Patches (4)
- fix(path) fix parse behavior
- fix base/filename internally
- fix wrapping optional chains
- Fix typo in macro docs
📄 View Raw Release Notes (Original Developer Log)
**[Read Bun v0.6.6's release notes on Bun's blog](https://bun.sh/blog/bun-v0.6.6)**
To install:
```bash
curl https://bun.sh/install | bash
# or you can use npm
# npm install -g bun
```
To upgrade:
```bash
bun upgrade
```
<a href="https://bun.sh/blog/bun-v0.6.6">
</a>
## What's Changed
* Support FormData & file uploads in `fetch` body by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/3123
* fix(path) fix parse behavior by @cirospaciari in https://github.com/oven-sh/bun/pull/3134
* Add macro docs by @colinhacks in https://github.com/oven-sh/bun/pull/3139
* fix base/filename internally by @cirospaciari in https://github.com/oven-sh/bun/pull/3141
* fix wrapping optional chains by @dylan-conway in https://github.com/oven-sh/bun/pull/3142
* Make uploading files with `fetch()`fast by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/3125
* Fix typo in macro docs by @mikeroelens in https://github.com/oven-sh/bun/pull/3144
* isolated version of `path.parse` compatible with nodejs by @cirospaciari in https://github.com/oven-sh/bun/pull/3143
* Remove bun-macro-relay and update docs by @colinhacks in https://github.com/oven-sh/bun/pull/3145
* Small improvements to `bun test` by @Electroid in https://github.com/oven-sh/bun/pull/3071
* don't rewrite `module.exports` if assign target is `update` or `replace` by @dylan-conway in https://github.com/oven-sh/bun/pull/3147
**Full Changelog**: https://github.com/oven-sh/bun/compare/bun-v0.6.5...bun-v0.6.6