Hacker News: rnestler

Safe Ways to Use AI Agents

rnestler — Mon, 29 Jun 2026 09:49:15 +0000

Article URL: https://blog.rnstlr.ch/safe-ways-to-use-ai-agents.html

Comments URL: https://news.ycombinator.com/item?id=48717052

Points: 1

# Comments: 0

Safe Ways to Use AI Agents

rnestler — Tue, 26 May 2026 16:14:11 +0000

Article URL: https://blog.rnstlr.ch/safe-ways-to-use-ai-agents.html

Comments URL: https://news.ycombinator.com/item?id=48281751

Points: 3

# Comments: 0

LibrePCB 2.1 with cross-probing, net highlighting, UI themes and more

rnestler — Tue, 19 May 2026 19:56:16 +0000

Article URL: https://librepcb.org/blog/2026-05-19_release_2.1.0/

Comments URL: https://news.ycombinator.com/item?id=48198608

Points: 4

# Comments: 1

New comment by rnestler in "We can’t send mail farther than 500 miles (2002)"

rnestler — Thu, 29 Jan 2026 11:42:33 +0000

It has it in the AUR: https://aur.archlinux.org/packages/units

LibrePCB 2.0 with new slint.rs based UI

rnestler — Wed, 28 Jan 2026 13:40:26 +0000

Article URL: https://librepcb.org/blog/2026-01-28_release_2.0.0/

Comments URL: https://news.ycombinator.com/item?id=46795234

Points: 4

# Comments: 1

New comment by rnestler in "Reflections on Haskell and Rust"

rnestler — Tue, 01 Jul 2025 08:24:04 +0000

The article shows neatly how Rust is inspired by functional programming languages, but polished the concepts by learning from their mistakes.

In the "Purity and Referential Transparency" section I'd have expected some comparison with `const fn` in Rust. Aren't `const fn` in Rust pure?

New comment by rnestler in "Show HN: A Mypy-Compatible Python Language Server Built in Rust"

rnestler — Mon, 16 Jun 2025 12:13:15 +0000

I tested it quickly on a 30kLOC project. zmypy seems to be faster than mypy indeed:

Without mypy cache:

  $ rm -rf .mypy_cache
  $ time mypy
  Success: no issues found in 157 source files
  mypy  20.40s user 2.33s system 108% cpu 20.886 total

With mypy cache without any changes:

  $ mypy --version
  mypy 1.16.0 (compiled: yes)
  $ time mypy
  Success: no issues found in 157 source files
  mypy  0.56s user 1.84s system 628% cpu 0.381 total

mypy with a small change in a shared module

  $ time mypy
  Success: no issues found in 157 source files
  mypy tests/  2.32s user 2.06s system 168% cpu 2.601 total

zmypy:

  $ time zmypy
  Found 68 errors in 16 files (checked 157 source files)
  zmypy  0.68s user 0.05s system 99% cpu 0.731 total

Without caching and parallelization (as the 99% CPU usage indicates) it comes in the range of mypy using the cache and multiple cores (628% CPU usage) without any changes in the code.

zmypy seems to find more errors but they mostly boil down to the following errors

* Call to untyped function "__setitem__" in typed context

* ... has incompatible type "MagicMock"; expected ...

Maybe __setitem__ and MagicMock are treated specially in mypy? Also there seem to be differences in handling Protocol and enum comparison.

New comment by rnestler in "The Linux 6.15 kernel arrives – and it's big a victory for Rust fans"

rnestler — Fri, 30 May 2025 07:22:09 +0000

This article is IMO inaccurate in a few points:

> for the first time, we have a Rust-based driver in the mainline kernel.

https://rust-for-linux.com/amcc-qt2025-phy-driver is in mainline since 6.12 and https://rust-for-linux.com/asix-phy-driver even since 6.8

> empowers Nvidia's next-generation open-source graphics hardware. The driver targets Nvidia's RTX 2000 "Turing" series and newer GPUs.

This sounds like it is already fully working, but as far as I know it's just a stub driver merged so far: https://rust-for-linux.com/nova-gpu-driver, https://www.phoronix.com/news/NOVA-Driver-For-Linux-6.15

This makes the article appear as just click-bait to me.

New comment by rnestler in "Rust 1.0 (2015)"

rnestler — Thu, 15 May 2025 18:42:20 +0000

10 years already, amazing. I still remember playing around with pre 1.0 Rust and having my code break on every other compiler update :)

New comment by rnestler in "The Linux Kernel Matures to Having a Minimum Rust Toolchain Version"

rnestler — Tue, 02 Jul 2024 16:58:37 +0000

I maintain an AUR package which builds a Rust enabled kernel: https://aur.archlinux.org/packages/linux-rust

So far I just pinned the rustc version used by requiring rustup as a build dependency. Let's see if this lets me drop it or if it is still easier in the end to build with pinned version.

New comment by rnestler in "Spotify demonetizes all tracks under 1k streams"

rnestler — Mon, 08 Apr 2024 08:34:34 +0000

> In addition, if you add "donate" button you'd see a lot of artists being showered with cash.

There are donation buttons for some artist on Spotify. I guess the artist need to enable it? ("Signum Regis" is an artist that has a Donate button for example)

New comment by rnestler in "LibrePCB 1.1.0 Released"

rnestler — Wed, 03 Apr 2024 17:40:03 +0000

New features include: Live Parts Information via Partstack and EAGLE Project Import.

LibrePCB 1.1.0 Released

rnestler — Wed, 03 Apr 2024 17:40:03 +0000

Article URL: https://librepcb.org/blog/2024-04-03_release_1.1.0/

Comments URL: https://news.ycombinator.com/item?id=39920522

Points: 3

# Comments: 2

New comment by rnestler in "Broot: A new way to look at file management written in Rust"

rnestler — Wed, 06 Sep 2023 13:48:09 +0000

This looks really nice and useful! I wonder if I could configure it to open things in vim directly? Because currently it seems to use xdg-open which then opens it in whatever application is configured.

New comment by rnestler in "Linux 6.5 Upgrading the Rust Toolchain, New Modules Added"

rnestler — Mon, 19 Jun 2023 17:18:52 +0000

> Can I compile rust-written linux modules with a rust-written rust compiler?

The offficial Rust compiler is written in Rust.

> And where can I download bootstrap static ELF64 binaries of this compiler?

You can get a Rust compiler on https://rustup.rs

Probalby you can get one which is statically compiled for the musl target.

If you want to follow the boostrap procedure see https://rustc-dev-guide.rust-lang.org/building/bootstrapping...

New comment by rnestler in "Building an Out-of-Tree Rust Kernel Module Part Three"

rnestler — Thu, 15 Jun 2023 12:54:58 +0000

I finally managed to build an ArchLinux kernel that supports out-of-tree modules written in Rust. If you're interested in the whole journey there are also the following posts:

* https://blog.rnstlr.ch/building-an-out-of-tree-rust-kernel-m...

Building an Out-of-Tree Rust Kernel Module Part Three

rnestler — Thu, 15 Jun 2023 12:54:58 +0000

Article URL: https://blog.rnstlr.ch/building-an-out-of-tree-rust-kernel-module-part-three.html

Comments URL: https://news.ycombinator.com/item?id=36339762

Points: 4

# Comments: 1

New comment by rnestler in "Rust module system encourages bad practices"

rnestler — Thu, 08 Jun 2023 11:11:59 +0000

> The real problem is that you can't use crates to improve incrementalism when you have a type in one logical part of the module hierarchy implement a trait from another logical part. Due to orphan rules and coherence, it is not possible to implement a foreign trait for a foreign type.

Well you can implement a trait for a type from another logical part either in the crate of the trait or the crate of the type.

What is the use-case for implementing a foreign trait for a foreign type if you have both under control?

New comment by rnestler in "Rust module system encourages bad practices"

rnestler — Thu, 08 Jun 2023 11:01:43 +0000

> I wanted to separate the type, the trait and the implementation of the trait in different crates.

I usually put the traits in a separate crate, but keep concrete types and implementations for them in the same crate.

What is the use-case for splitting a type and it's implementation into separate crates? (except for cases where the trait or the type are out of your control, then one indeed needs to use the new-type escape hatch)

New comment by rnestler in "20M digits of pi in 1 minute using Julia"

rnestler — Sat, 04 Mar 2023 12:32:42 +0000

> (Plain Windows took ~26 seconds for some reason?)

Maybe the allocations were the reason?