Sofie Van Landeghem

The Diff & The Merge: my new substack over at oxykodit.substack.com where I write about the day-to-day life of being an open-source maintainer in the Python/data/AI domain.

Long-context models are coming to our phones and laptops. Sevren (the new kid on the European block) ported FlashPrefill V2 to MLX, bringing block-sparse attention to Apple silicon giving a 1.78X speedup on 32K tokens. OS code: github.com/sevren-ai/Fl... Blog post: sevren.ai/blog/flashpr...

Come to @fastapi.tiangolo.com Conf, it will be awesome, in person 🙋‍♂️ And there are tickets now 🎟️

FastAPI, Typer, SQLModel, Asyncer All bundle their own Agent Library Skills ✨ Let your agents (Codex, Claude, Cursor, etc) help you write good code and avoid gotchas 🤓 New SQLModel and Asyncer just released with their own library skills 🔖 library-skills.io

FastAPI 0.137.0: a big internal refactor for routers 🏗️ You are probably not affected, unless you are iterating on the internal router.routes, then check the docs 📝 If you use any third-party package that modifies FastAPI's internals and it stops working, let them know 🤓

Several Typer bug fix releases in a row in the past few days 🐛 @oxykodit.bsky.social caught a few edge case bugs after the Click vendoring 🙌 @patrick.wtf caught another one happening since before that 🙌 typer.tiangolo.com

Another small quick bug-fix release, 0.26.2 🐛 @oxykodit.bsky.social is keeping the guard. Checking, triaging and fixing everything that comes, right on the door. 😎

Your FastAPI is safe 🔒 Today, FastAPI was incorrectly flagged as malicious by automated tooling from a large company, among several other packages. FastAPI was not compromised. It was a false positive. We were not contacted before publication. This should not happen to OSS.

After a thorough ranking of moustaches, it is decided: @tiangolo.com will give the opening keynote at FastAPI Conf 🤓 (the fact that he created FastAPI and is writting here in third person has nothing to do with it) Join the waiting list 🫰🏼 fastapiconf.com

most of these github actions driven breaches are because of pull_request_target. here's some tips of what to look for when reviewing your own workflows. worth noting - it is safe, and necessary, when used correctly 🧵

Typer 0.25.1 comes with its own Library Skills for AI coding agents bundled ✨ Very cool things coming to Typer, your agent should know how to use them 🍰 Thanks @oxykodit.bsky.social ! 🙌 github.com/fastapi/typer

Don't miss it!

GitHub appears to have opted anyone using the CLI into sending telemetry they will use to inform product decisions. This is sneaky and should have been an opt-in decision, not opt-out. Disable it with `gh config set telemetry disabled`. cli.github.com/telemetry

Here's Typer 0.24.2 with a small bug fix, thanks @oxykodit.bsky.social ! 🙌 typer.tiangolo.com

FastAPI 0.136.0 officially supports: ✨ free-threaded Python 🐍 ✨ (this announcement has no GIL puns) Thanks @oxykodit.bsky.social, @patrick.wtf, Nathan Goldbaum, @nucleonjohn.bsky.social 🙌 github.com/fastapi/fast...

Since I go through my github notifications on a FIFO basis, but I only keep the latest email per issue, whenever someone posts “any updates?” it moves that issue right to the bottom of the queue and I think that’s kinda poetic.

Hey if you need something to do over this long weekend, have a go at my PhD student Anna-Merete’s survey. It’s sentences to rate, you just need to have any English variety as your first language, and it’ll take you 10–15 minutes. #linguistics docs.google.com/forms/d/e/1F...

All my Python projects are now using ty for type checks 🎉 @fastapi.tiangolo.com, Typer, SQLModel, Asyncer, etc. Thank you @oxykodit.bsky.social 🙌 ty is great, try it docs.astral.sh/ty/

Here's a big one! 🎉 Official FastAPI extension for @vscode.dev 🎁 🗺️ Path operations explorer 🔎 ...and search ✅ From tests: go to definition 🎁 And more! marketplace.visualstudio.com/items?itemNa... GitHub: github.com/fastapi/fast... Thank you @savannah.dev 🙌

Somewhere along the line **someone** has to do the uncomfortable work of understanding what the hell is going on with the code and project (and keeping that understanding current in the face of ongoing changes to the project) Vibe coding is trading that understanding for short-term gains

Here's Typer 0.21.2 🎁 The highlight, @oxykodit.bsky.social added the official reference docs: typer.tiangolo.com/reference/ And updated the guide to build a Typer package to now use uv: typer.tiangolo.com/tutorial/pac...

Only 1 more day to fill the Typer developer survey! ⌨️ The results will guide future features and (breaking) changes. 🔥 forms.gle/XEH3NL2wqpFP...

If you're using Typer, please fill in this survey to help us drive future developments in line with what the community needs! 🙏

Here's SQLModel 0.0.32, fix support for Annotated fields with @pydantic.dev 2.12+ 🐛 Thanks @vimota.bsky.social ! 🙌 And thanks @patrick.wtf , @oxykodit.bsky.social , and YuriiMotov for the work and help. 🍰 sqlmodel.tiangolo.com

This "Automated Contributions Policy" from scikit-learn is really good and on point: scikit-learn.org/dev/develope... Please, whatever OS repo you intend to contribute to, read this first 🙏

I just migrated the docs for Asyncer from Material for MkDocs to @zensical.org ✨ I was expecting a challenge, I was disappointed, it was too easy. 😂 Install and run, that's it. All the configs unchanged, even the CLI preserves the exact same commands. ☕️ asyncer.tiangolo.com

You didn't hear it from me! 🤫

Awesome team! 🫶

Quick fix release, 0.119.1 🍫 This fixes compatibility (warnings) with @pydantic.dev 2.12.1 on Python 3.14 🐍 Nothing changed for the final users, but still a lot of work underneath to get it done. 😅 Thanks @oxykodit.bsky.social! 🙌 github.com/fastapi/fast...

Who's hungry? There's pi 🥧 FastAPI 0.118.3 has official support for Python 3.14 🎉 Big thanks to @oxykodit.bsky.social for a long debugging and preparation process! 🙌 And shoutout to @1st1.dev and Fantix from @geldata.com for the new httptools with support for 3.14 🙇

Here's SQLModel 0.0.27, with support for Python 3.14 🐍😎 @oxykodit.bsky.social 🙌 github.com/fastapi/sqlm...

SQLModel 0.0.26 just released 🔖 With support for the latest @pydantic.dev and some fixes for types that became a rabbit hole handled by @oxykodit.bsky.social 🙌🐇 github.com/fastapi/sqlm...

Here's FastAPI 0.118.1, with compatibility for the latest @pydantic.dev. 🚀 This one had the combined effort of the community, the @pydantic.dev team, and the @fastapi.tiangolo.com team, all together. 🙌 github.com/fastapi/fast...

The stable release of Python 3.14 is out now! Go, go, go update! 🙌 discuss.python.org/t/python-3-1...

🥳🥳🥳

New Asyncer release, 0.0.9 🔖 This is the tool you would use to easily mix async and blocking code 🔄 @oxykodit.bsky.social just fixed support for the latest AnyIO, used underneath 🚀 github.com/fastapi/asyn...

😎

Quick Typer release 0.18.0 (and 0.17.5) with compatibility for the latest Click just released 🐛 Thank you @oxykodit.bsky.social for the fast discovery, analysis, and fix! 🙌 github.com/fastapi/typer

Quick Typer bugfix release, 0.17.4 🐛 Thanks @oxykodit.bsky.social! 🙌 github.com/fastapi/typer