🦀 coder at @openai. Sometimes do freelance journalism: @Guardian, @Telegraph, @openDemocracy. Python core dev in my spare time 🐍. Studied 🎶 a while back.
Joined July 2013
- Tweets 730
- Following 969
- Followers 641
- Likes 6,281
59 Photos and videos
Pinned Tweet
5 Nov 2024
I'm now on 🦋. alexwaygood [dot] bsky [dot] social.
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Alex Waygood retweeted
Jun 11
ty-pre-commit is out now!
Pre-commit hooks for type checkers typically require you to either enumerate your dependencies in the hook config, or install them out-of-band.
This one Just Works (TM) by leveraging uv to install any necessary dependencies prior to type-checking.
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Alex Waygood retweeted
Jun 3
I was recently diagnosed with a rare autoimmune disorder called anti-NMDA receptor encephalitis. It's a "disease of chaos" that completely upturned my life for a couple months.
I wrote a blog about it that goes into more detail and discusses prognosis.
burntsushi.net/encephalitis/
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Alex Waygood retweeted
Apr 28
Ghostty is leaving GitHub. I'm GitHub user 1299, joined Feb 2008. I've visited GitHub almost every single day for over 18 years. It's never been a question for me where I'd put my projects: always GitHub. I'm super sad to say this, but its time to go. mitchellh.com/writing/ghostt…
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Alex Waygood retweeted
Mar 19
After the deal closes, OpenAI will continue supporting our open source tools, and we'll keep building in the open -- for the Python ecosystem -- just as we have from the start.
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Alex Waygood retweeted
Mar 19
We've entered into an agreement to join OpenAI as part of the Codex team.
I'm incredibly proud of the work we've done so far, incredibly grateful to everyone that's supported us, and incredibly excited to keep building tools that make programming feel different.
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Alex Waygood retweeted
17 Dec 2025
ran on all files in my codebase.
pyright: 5 seconds
ty: instant
i'm convinced
16 Dec 2025
Announcing the Beta release of ty: an extremely fast type checker and language server for Python, written in Rust.
We now use ty exclusively in our own projects and are ready to recommend it to motivated users.
10x, 50x, even 100x faster than existing type checkers and LSPs.
ALT Comparing ty to Pyrefly, Pyright, and mypy on home-assistant.
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Alex Waygood retweeted
17 Dec 2025
We are so incredibly excited to see ty in beta!
@astral_sh ships quality tools.
16 Dec 2025
Announcing the Beta release of ty: an extremely fast type checker and language server for Python, written in Rust.
We now use ty exclusively in our own projects and are ready to recommend it to motivated users.
10x, 50x, even 100x faster than existing type checkers and LSPs.
ALT Comparing ty to Pyrefly, Pyright, and mypy on home-assistant.
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Alex Waygood retweeted
17 Dec 2025
I am SO excited about ty 🤩
Can't wait to start playing with it
16 Dec 2025
Announcing the Beta release of ty: an extremely fast type checker and language server for Python, written in Rust.
We now use ty exclusively in our own projects and are ready to recommend it to motivated users.
10x, 50x, even 100x faster than existing type checkers and LSPs.
ALT Comparing ty to Pyrefly, Pyright, and mypy on home-assistant.
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Alex Waygood retweeted
16 Dec 2025
ty was our most technically-challenging project yet.
There are so many people to thank: our contributors, members of the Python typing community, the Salsa team, the Elixir team (whose work strongly influenced our approach to gradual types and intersections), and more.
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Alex Waygood retweeted
16 Dec 2025
On a longer time horizon, though, ty will power semantic capabilities across the Astral toolchain: dead code elimination, unused dependency detection, SemVer-compatible upgrade enforcement, CVE reachability analysis, type-aware linting, and more.
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Alex Waygood retweeted
16 Dec 2025
We want to make Python the most productive programming ecosystem on Earth.
Just as with Ruff and uv, our commitment from here is that ty will get significantly better every week by working closely with our users.
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16 Dec 2025
So, so hyped that this release is finally out!
It was a huge amount of effort to get this over the line. There's still so much more to do but we're so excited for more folks to try it out and tell us what you think 😃
16 Dec 2025
Announcing the Beta release of ty: an extremely fast type checker and language server for Python, written in Rust.
We now use ty exclusively in our own projects and are ready to recommend it to motivated users.
10x, 50x, even 100x faster than existing type checkers and LSPs.
ALT Comparing ty to Pyrefly, Pyright, and mypy on home-assistant.
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16 Dec 2025
And as always, such a privilege to be part of this incredible team x.com/charliermarsh/status/2…
16 Dec 2025
But above all I want to thank our core team: @AlexWaygood, @sharkdp86, @carljm, @DhruvManilawala, @dcreager, @Gankra_, @burntsushi5, @ibraheemdev, @oconnor663, and Micha Reiser.
You created ty from nothing and pushed it to be great from Day 1.
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Alex Waygood retweeted
16 Dec 2025
ty also includes a best-in-class diagnostic system, inspired by the Rust compiler's own world-class error messages.
A single ty diagnostic can pull in context from multiple files at once to explain not only what's wrong, but why (and, often, how to fix it).
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Alex Waygood retweeted
16 Dec 2025
Announcing the Beta release of ty: an extremely fast type checker and language server for Python, written in Rust.
We now use ty exclusively in our own projects and are ready to recommend it to motivated users.
10x, 50x, even 100x faster than existing type checkers and LSPs.
ALT Comparing ty to Pyrefly, Pyright, and mypy on home-assistant.
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Alex Waygood retweeted
8 Oct 2025
This year, we managed to ship Python 3.14 support for uv and Ruff on the day of the stable release. A big lift from the whole team.
We wrote up a guide on some of our favorite features from 3.14, and how they affect our tools.
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Alex Waygood retweeted
8 Oct 2025
As of Python 3.14, the free-threaded (or no-GIL) version of the Python interpreter is no longer considered experimental.
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Alex Waygood retweeted
7 Oct 2025
🐍 Python 3.14 is here! 🎉
✨ Template strings (t-strings)
🚀 Free-threaded Python officially supported
🎨 Syntax highlighting in the REPL
📦 Zstandard compression in stdlib
🔍 Remote PDB debugging
Full release notes: docs.python.org/3.14/whatsne…
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Alex Waygood retweeted
5 Sep 2025
We're continuing our commitment to the Open Source Pledge this year, projecting another $44,000 in open source sponsorship from the Astral OSS Fund to maintainers / projects we respect, depend on, and learn from.
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