Impact Score: 5/10
Bun v0.5.9
Source available โ automated, not human-reviewed
Component: bun ยท Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
โก Executive Summary (TL;DR)
Bun bun-v0.5.9. Source highlight: **Read Bun v0.5.9's release notes on Bun's blog**
Who Does This Impact? (Role-Based Analysis)
๐ป Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
๐ Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
โ๏ธ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
โจ New Features & Capabilities (2)
- Add doc on watch mode
- Add stubs for missing node builtins
๐ง Bug Fixes & Patches (6)
- Fix example for "bun pm ls"
- Fix typo in `CONTRIBUTING.md`
- Fix: SQLite benchmark source pointing to wrong URL
- Fix types
- A couple bug fixes
- Fixes #2462
๐ View Raw Release Notes (Original Developer Log)
**[Read Bun v0.5.9's release notes on Bun's blog](https://bun.sh/blog/bun-v0.5.9)**
To install:
```bash
curl https://bun.sh/install | bash
# or you can use npm
# npm install -g bun
```
To upgrade:
```bash
bun upgrade
```
## What's Changed
* Fix example for "bun pm ls" by @jq170727 in https://github.com/oven-sh/bun/pull/2440
* Support directories in ZSH run completions by @JacksonKearl in https://github.com/oven-sh/bun/pull/2425
* "bun-create" example "postinstall"โ"preinstall" by @jq170727 in https://github.com/oven-sh/bun/pull/2441
* docs: update moduleResolution to bundler by @johnnyreilly in https://github.com/oven-sh/bun/pull/2429
* Make event emitter type-safe by @gaurishhs in https://github.com/oven-sh/bun/pull/2414
* docs: Buchta Docs Page by @Fire-The-Fox in https://github.com/oven-sh/bun/pull/2378
* Fix typo in `CONTRIBUTING.md` by @bnzone in https://github.com/oven-sh/bun/pull/2446
* Fix: SQLite benchmark source pointing to wrong URL by @JokerQyou in https://github.com/oven-sh/bun/pull/2452
* Fix types by @colinhacks in https://github.com/oven-sh/bun/pull/2453
* A couple bug fixes by @dylan-conway in https://github.com/oven-sh/bun/pull/2458
* Use PATH instead of sudo to install bun for testing by @jsoref in https://github.com/oven-sh/bun/pull/2460
* test(undici): rm external http reqs from tests by @ThatOneBro in https://github.com/oven-sh/bun/pull/2459
* Fixes #2462 by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2463
* [install] fix tests by @alexlamsl in https://github.com/oven-sh/bun/pull/2488
* fix https default port on http.request by @cirospaciari in https://github.com/oven-sh/bun/pull/2490
* Fix for latest zig by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2495
* Remove extra 's' on keep by @andres039 in https://github.com/oven-sh/bun/pull/2498
* [install] support tarball URLs by @alexlamsl in https://github.com/oven-sh/bun/pull/2497
* More bug fixes by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2486
* `bun --watch` and `bun test --watch` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2500
* Add doc on watch mode by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2502
* Fixes #2499 by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2501
* Fix some yarn.lock printing issues by @Validark in https://github.com/oven-sh/bun/pull/2506
* Fix date format (#2422) by @adrien-zinger in https://github.com/oven-sh/bun/pull/2474
* [install] fix re-run of tarball URL from lockfile by @alexlamsl in https://github.com/oven-sh/bun/pull/2507
* Generate dependency files in `make bindings` by @dylan-conway in https://github.com/oven-sh/bun/pull/2510
* [install] fix re-install of git dependency by @alexlamsl in https://github.com/oven-sh/bun/pull/2519
* [install] fix stale pointer with tarball URLs by @alexlamsl in https://github.com/oven-sh/bun/pull/2520
* report timed-out test as failure by @alexlamsl in https://github.com/oven-sh/bun/pull/2523
* Remove debug symbols from release webcrypto bindings by @dylan-conway in https://github.com/oven-sh/bun/pull/2527
* Update NodeJS LTS version in run_command.zig by @jakeboone02 in https://github.com/oven-sh/bun/pull/2533
* Add stubs for missing node builtins by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2534
* [install] reduce parallel HTTP requests under heavy load by @alexlamsl in https://github.com/oven-sh/bun/pull/2536
## New Contributors
* @jq170727 made their first contribution in https://github.com/oven-sh/bun/pull/2440
* @JacksonKearl made their first contribution in https://github.com/oven-sh/bun/pull/2425
* @Fire-The-Fox made their first contribution in https://github.com/oven-sh/bun/pull/2378
* @bnzone made their first contribution in https://github.com/oven-sh/bun/pull/2446
* @JokerQyou made their first contribution in https://github.com/oven-sh/bun/pull/2452
* @andres039 made their first contribution in https://github.com/oven-sh/bun/pull/2498
* @adrien-zinger made their first contribution in https://github.com/oven-sh/bun/pull/2474
**Full Changelog**: https://github.com/oven-sh/bun/compare/bun-v0.5.8...bun-v0.5.9