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Show HN: Bolt – A super-fast, statically-typed scripting language written in C

37 beariish 10 8/10/2025, 5:53:09 PM github.com ↗

I've built many interpreters over the years, and Bolt represents my attempt at building the scripting language I always wanted. This is the first public release, 0.1.0!

I've felt like most embedded languages have been moving towards safety and typing over years, with things like Python type hints, the explosive popularity of typescript, and even typing in Luau, which powers one of the largest scripted evironments in the world.

Bolt attempts to harness this directly in the lagnauge rather than as a preprocessing step, and reap benefits in terms of both safety and performance.

I intend to be publishing toys and examples of applications embedding Bolt over the coming few weeks, but be sure to check out the examples and the programming guide in the repo if you're interested!

Comments (10)

MobiusHorizons · 1h ago

FYI "the embedded scene" is likely to be interpreted as "embedded systems" rather than "embedded interpreters" even by people who know about embedded interpreters, especially since all the languages you give as an example have been attempted for use on those targets (micropython, lua, and even typescript)

beariish · 58m ago

That's a good point, thank you. I've made a small edit to clarify.

themonsu · 1h ago

Looks cool, but please can we stop naming things ”bolt”

grodriguez100 · 1h ago

Sounds very good, and I can see many use cases in embedded systems. But that probably requires 32-bit arm support. Is that planned ?

beariish · 1h ago

As of right now no - my primary target when developing this was realtime and games in particular since that's what I know best, but if there's a real target in embedded that's certainly something that could be explored.

acron0 · 1h ago

If I was still writing games I would be alllllll over this

thrance · 1h ago

Function return type inference is funny but I don't think it's that great of a feature. It makes it harder for a library's consumer to know how to properly use a function, and it also makes it harder for the maintainer to not break backwards compatibility inadvertently. Anyway, I'm all for experimenting.

beariish · 54m ago

There's nothing stopping a library author from explicitly annotating return types wherever a stable interface is important, the idea is more for smaller functions or callbacks to make use of this. Perhaps I'll make the examples clearer to reflect the intention.

eulgro · 44m ago

The question I ask myself when I see this kind of project is: how long are you willing to maintain it for?

My main concern about a new language is not performance, syntax, or features, but long term support and community.

01HNNWZ0MV43FF · 38m ago

In the end, weight is a kind of strength, and popularity is a kind of quality. It looks promising but you can't expect long-term support until there's more contributors and users

At this point it is too early to know. Even JavaScript took like 20 years to catch on