Kosh – Bash shell runtime with 100x faster Shellcheck and LSP built-in
Kosh is a Bash-compatible runtime focused on VERY detailed diagnostics and performance. The project started from frustration with how difficult shell errors can be to debug. And how slow some tools are. The project is feature-complete and the core is usable enough to experiment with. There is a Language Server that works on shell scrips, but I'm planning to expand it to support every conf/YAML/etc file that may have Bash embedded in, e.g. GitHub workflows. Report: bash incompatibility, broken diagnostics, cases where existing tools may solve the problem better Thanks!
What it does
the fastest and most portable cross-platform bash-compatible command interpreter, interactive shell, formatter and language server - toiletbril/kosh
The project was renamed in 0.2.0. The shit is now kosh , shitbox is koshkit , and every prefix is changed to kosh or KOSH_ . I got over the funny name. Thanks. Koshka is an interpreter, interactive shell, formatter and a language server, with first tier support for Windows, Linux and macOS, fully compatible with Bash 5.3 and Dash. Koshka contains ~300 built-in shellcheck diagnostics. It is usually 5x faster than bash, or ~100x+ faster than shellcheck, which makes it exceptionally friendly to coding agents or strict environments where Bash is still used. Koshka aims to be a complete, faster and portable Shellcheck and Bash replacement. The shell guarantees first tier support for Linux, macOS…from github.com
Does the same job
all alternatives →
- BSBach.sh is a real unit testing framework for Bash2020 · github.com · ▲52
- IWI wrote a Bash library2018 · ▲10
Shelon: https://github.com/housni/sheldon It's not a framework, it's a library. It attempts to mimic function names in Python. Most functions work in Bash 4.3+ but there are those that work on older versions. The 'help' target in Makefile is on crack! Check the issues in that repo for upcoming features. Useful for DevOps Engineers or anyone who has to write Bash scripts.
- FAForsh – A Unix shell embedded in Forth2017 · bitbucket.org · ▲76
- ACA complete Bash parser in JavaScript transpiled from Go2018 · npmjs.com · ▲89
- SBShellTalk brings deterministic text-to-bashApr 2026 · barrasso.me · ▲9
Hi HN! I built a CLI tool called ShellTalk for macOS, Linux, and web (WebAssembly) that maps English text to the corresponding Bash commands. ShellTalk is written in Swift and available under the Apache 2.0 license on GitHub. I was inspired a few weeks ago after reading the Meta-Harness paper and seeing a tool called Hunch that did something similar using the Apple Foundation model. I often forget flag names and orders, but I wanted something that worked consistently. The 3B AFM worked surprisingly well with Hunch, but it felt slow and sometimes slight changes in what I wrote would result in…
More dev tools this month
the category →



Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com

OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com

Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com