Top Tweets for #fsharp
📦 Fable 5.27.0 is live!
Featuring cross-backend support for hex conversions, improved file tracking during rebuilds, and a massive set of BCL alignment fixes across JS, TS, Python, and Rust.
Details & release notes: https://t.co/X4cIDhlVwH
#fsharp
F# Interactive, next to your code.
▶ Run a snippet and see the result inline.
▶ Run to here runs everything above it.
New in Guide Coding 1.0.18 🎬 #fsharp
F# Interactive, but next to your code.
The Guide Coding lab is a scratch .fsx connected to your project.
▶ Run a snippet and its result shows up inline, right after the line.
Use languages with:
1. Strong static typing
2. ADT (= struct and enums)
3. Null safety + Result type
4. Preferably affine (linear is even better) typing
5. Strong linter to enforce best practices
And delete every tests except algorithmic logic, boundary IO, and integration flows
#fsharp 💙
autoresearch loop w/ opus 5.5 in my custom harness beat Rust solution with F# solution for $12 server challenge
https://t.co/CkraNKCguS
Serde.FS 1.0 is out 🎉 After 5 months of beta, dogfooded on real projects.
Write one [<RpcApi>] interface and get ASP․NET endpoints plus .NET and Fable clients, generated at compile time. No reflection, so it runs under Native AOT.
https://t.co/8SPUmmGWQ4 #fsharp
![jordan_n_marr's tweet photo. Serde.FS 1.0 is out 🎉 After 5 months of beta, dogfooded on real projects.
Write one [<RpcApi>] interface and get ASP․NET endpoints plus .NET and Fable clients, generated at compile time. No reflection, so it runs under Native AOT.
https://t.co/8SPUmmGWQ4 #fsharp https://t.co/yND6ZyLFlM](https://pbs.twimg.com/media/HWJajBkW8AAWukr.png)
F# Weekly #44, 2026 – https://t.co/L4DUZePbQI 6.0, and a new F# Advent Calendar #fsharp https://t.co/T0vM9kwiuN
For those of you who work with #fsharp and #dotnet and want to have a good @CloudflareDev experience, FSharp.CloudEdge was just bumped to 0.1.1 with Pi Agents support.
For all the points mentioned in this, F# is an excellent fit.
If the language of choice doesn't really matter if you're using an LLM to generate code, isn't it better to start new projects in #fsharp?
so many gems and great tips in this talk from @yminsky about how to improve your codebase for agents
• agents thrive on feedback, and types are one of the best kinds
• make illegal states unrepresentable with types, and it enforces global rules across your codebase
• property based tests, fuzzing, and even full-system deterministic simulation testing
• expect tests: just print stuff out and capture it in the test. makes behavior legible. it's very similar to how compilers have fixture tests, it reduces the review surface area
• formal methods used to be very expensive: seL4 is about 8,700 lines of C and took around 25 person-years, with 23 lines of proof for every line of C code, but agents change the roi
https://t.co/0zDb5euxhr
🚀 Free speedups for JS/TS in the next Fable release:
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp
Ouch 😊 #fsharp
ok new week new topic. what’s everyone’s favorite joke ever made in a PL publication? I think mine is this one (from “The Myths of Object-Orientation” by James Noble)
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