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Open Source

Breakout GitHub projects, open-source releases, and developer tools.

Cloudflare blog graphic announcing that VoidZero is joining Cloudflare
Open Source·

Cloudflare bought VoidZero, the team behind Vite. The tools stay MIT and vendor-neutral.

Cloudflare acquired VoidZero, Evan You's company behind Vite, Vitest, Rolldown and Oxc. The tools stay MIT-licensed, and there's a $1M ecosystem fund.

The microsoft/coreutils GitHub repository page
Open Source·

Microsoft is shipping Linux's core commands on Windows, built in Rust

Microsoft's Coreutils for Windows brings native ls, cp, and grep to Windows, built on the Rust uutils project. Here's what it is and why the Rust rewrite matters.

A source-code editor open to C++ code, evoking the debate over AI-written contributions to open source
Open Source·

SQLite won't accept AI-written code, but QEMU just opened the door to it

Two of the most cautious C projects split on AI contributions in the same week. The real fight is over copyright provenance and who cleans up the slop.

An open-source graphic, representing the long-lived MySQL codebase where bug #11472 sat for two decades.
Open Source·

MySQL just fixed a 20-year-old bug where cascade deletes silently skipped triggers

MySQL bug #11472 was filed in 2005: triggers never fired on foreign key cascade actions, silently breaking audit logs. MySQL 9.7 finally closes it via WL#17024.

A scan of the 86-DOS changelist from Tim Paterson's 1981 assembler printout, the kind of artifact Microsoft released under MIT on April 28.
Open Source·

Microsoft just open-sourced 86-DOS. Tim Paterson's 45-year-old listings are now on GitHub under MIT.

Yufeng Gao and Rich Cini scanned Tim Paterson's 1981 assembler printouts. Microsoft pushed them to DOS-History/Paterson-Listings on April 28, the 45th anniversary.

A Linux boot screen with kernel messages scrolling, used here as visual shorthand for the init-system layer where the Flatpak/systemd argument is happening.
Open Source·

Flatpak's next sandboxing milestone bolts it to systemd. Alpine and Void users get the bill.

Sebastian Wick and Adrian Vovk pitched systemd-appd at Linux App Summit on May 17. The cost of nested sandboxing is a hard systemd dependency in mainline Flatpak.

C# 15 union types announcement graphic from the Microsoft .NET Blog
Open Source·

C# is getting union types in version 15. The preview shipped in .NET 11 Preview 2.

Mads Torgersen's union proposal landed in .NET 11 Preview 2 on April 2. C# 15 targets November 2026 and replaces the OneOf library hack the .NET community has been living with.

Figure from a forensic document-examination study used here as visual shorthand for verifying authorship of code.
Open Source·

yt-dlp's maintainer says Bun is now 'fully vibe-coded'. Support is officially deprecated.

yt-dlp's maintainer bashonly says Bun's Rust rewrite 'has taken a turn towards being fully vibe-coded.' The supported window narrowed to four versions.

A diagram from Cloudflare's blog post illustrating how a Wasm instance recovers state after a Rust panic.
Open Source·

Cloudflare taught wasm-bindgen to catch a Rust panic. Workers no longer poison the sandbox.

Three Cloudflare engineers shipped panic and abort recovery into wasm-bindgen on April 22. A Rust Worker that panics now reinitialises on the next request.

GitHub Open Graph card for oven-sh/bun pull request #30412, the Rust rewrite merge.
Open Source·

Bun's million-line Rust rewrite is now mainline. 99.8% of tests pass and 13,000 unsafe blocks remain.

Jarred Sumner merged the Bun-in-Rust PR on May 14, ending Zig as Bun's runtime language. Binary shrinks 3-8 MB; one analysis counted 13,000 unsafe blocks.

Doom running on Bazzite Linux on a handheld gaming device
Open Source·

Elizabeth Figura's NTSYNC driver shipped in Linux 6.14. Wine 11 retired esync and fsync over it.

Linux 6.14 merged the NTSYNC driver Elizabeth Figura wrote at CodeWeavers. SteamOS 3.7.20 loads it by default; Wine 11 went mainline on it. Here's what changed.

Obsidian application banner showing the note-taking app branding
Open Source·

120 million plugin downloads later, Obsidian moved off GitHub. Paid plugins are now allowed.

Obsidian launched Obsidian Community on May 12. The new directory replaces the GitHub plugin queue with automated reviews, and paid plugins are in for the first time.

RPCS3 project logo on a solid black background, from the official rpcs3.net press graphic
Open Source·

RPCS3's maintainers will ban contributors who submit undisclosed AI pull requests

The PS3 emulator project posted on X on May 10, citing 'AI slop' that has been clogging review. The hard line: ban-on-sight if you don't disclose.

The Register's coverage of Bun's experimental Zig-to-Rust port
Open Source·

Jarred Sumner rewrote 960,000 lines of Bun from Zig to Rust in six days. He might throw it all away.

Bun's creator used Claude to port the JavaScript runtime from Zig to Rust, hitting 99.8% test compatibility. He says there's a 'very high chance' it gets scrapped.

A page of the original 86-DOS 1.00 assembler listing showing handwritten changelist annotations
Open Source·

Microsoft open-sourced the earliest known DOS code, transcribed from a stack of Tim Paterson's printouts.

MIT-licensed at GitHub on April 28, the 86-DOS 1.00 kernel and PC-DOS development snapshots were OCR'd from 45-year-old assembler listings.

Notepad++ for Mac project page hero showing the ported macOS code editor
Open Source·

An unofficial Notepad++ port finally landed on Mac. Don Ho didn't write it.

Andrey Letov shipped a native macOS Notepad++ port as a universal binary with the original Scintilla engine and a new Cocoa UI. It's GPL, free, and unaffiliated with Don Ho.

The Zed 1.0 launch graphic in dark mode with the Zed wordmark and a stylized cursor.
Open Source·

Zed 1.0 ships its agentic editor. The Atom team's Rust rewrite finally has a stable label.

Zed Industries shipped 1.0 on April 29 after five years of Rust and GPU work. Free forever for humans, with $10/month hosted AI and an open Agent Client Protocol.

Open-source illustration showing a stylized icon for collaborative software development.
Open Source·

Mitchell Hashimoto is pulling Ghostty off GitHub. The reason is daily outages.

Ghostty's creator has tracked GitHub outages every workday for months. After 18 years on the platform, he's moving the project. A read-only mirror stays.