Blacklight Foundation public alpha

Ultraviolet

A systems programming language for LLM-generated code humans can still review.

Ultraviolet is an alpha systems programming language designed around explicit semantics, local reasoning, and predictable source generated by LLMs and other tools. The project is stewarded by Blacklight Foundation.

Read the docs Sponsor the public alpha View on GitHub

public-alpha.focus reviewable-source

compiler: migration + release infrastructure
docs: quickstart + language tour
demo: planned LLM source review path
funding: founding sponsors + milestones

Current status

Alpha language
Bootstrap-built uv compiler artifact exists
Clean public build/check path is being stabilized
Public specification exists
Stewarded by Blacklight Foundation
Seeking founding sponsors and public milestone funders

LLM-generated code is still human-facing code.

LLM-generated code is reviewed, debugged, diffed, audited, and trusted in production. Ultraviolet gives machine authors a narrower, explicit target and gives human reviewers source that exposes authority, mutability, effects, and ownership locally.

Design principles

One Correct Way

Semantic operations should have one accepted source form where possible.

Local Reasoning

A reader should understand authority, ownership, mutability, and effects from local syntax and signatures.

Explicit over Implicit

Effects, allocation, synchronization, unsafe behavior, and authority should not hide behind convenience.

Static by Default

Prefer static mechanisms. Runtime behavior should require explicit opt-in where possible.

Fund the public alpha.

Blacklight Foundation funds the public compiler, specification, documentation, examples, diagnostics, CI, and community infrastructure for Ultraviolet.

See funding goals Become a sponsor

Public Alpha Launch Fund

$25,000

Fund the first usable public alpha of Ultraviolet.

First LLM-Generated Code Demo Fund

$35,000

Fund the first public demonstration of reviewable LLM-generated systems code.

Open LLM Training Corpus Fund

$50,000

Fund an open-source training corpus for LLMs that generate Ultraviolet source.

Maintainer-in-Residence Fund

$120,000/year

Fund sustained public compiler, documentation, release, and contributor work.

Help build a language for reviewable LLM-generated systems code.

Sponsor the public alpha