🦞 NyxCode

The AI-native programming language for the web.

One .nyx file → full-stack app with database, auth & API. 68% fewer tokens than React.

Install

npm install @fabudde/nyxcode

# or run directly:
npx @fabudde/nyxcode build app.nyx
npx @fabudde/nyxcode dev app.nyx       # Dev server + hot reload

Why NyxCode?

AI writes 80% of code in 2026. Every token costs money, time, and context window. NyxCode is the first language designed for this reality.

30 lines of NyxCode = 500+ lines of TypeScript + Express + React.

table posts {
  title text required
  body text
  created auto
}

security {
  table users
  login email password
  token jwt
  protect /api/posts
}

theme {
  colors { primary #667eea, bg #0a0a12, card #1a1a2e }
}

page / {
  style { bg var(--colors-bg) }
  h1 "My Blog" style="color: var(--colors-primary);"

  form /api/posts auth {
    input title placeholder="Title" required
    textarea body placeholder="Write..."
    submit "Publish"
    success -> reload
  }

  data posts = get /api/posts auth
  each posts -> post {
    section {
      style { bg var(--colors-card), radius 12px, padding 1.5rem }
      h3 .title
      p .body
    }
  }
}

nyx build generates:

• index.html — styled page with form submission + data binding
• server.js — Express + SQLite + JWT auth + CRUD + rate limiting

Features

🗄️ Full-Stack in One File (v0.5+)

table posts { title text required, body text, created auto }

security {
  table users
  login email password
  token jwt
  protect /api/posts
}

That's it. Compiler generates Express server, SQLite database, JWT auth, bcrypt passwords, CRUD endpoints, rate limiting. Zero config.

📝 Native Forms (v0.6)

form /api/posts auth {
  input title placeholder="Post title" required
  textarea body placeholder="Write..."
  submit "Publish"
  success -> reload
  error -> toast "Failed"
}

6 lines. Zero JS. Compiler generates <form> + fetch() + auth headers + success/error handling.

🎨 Theme Variables (v0.6)

theme {
  colors {
    primary #667eea
    bg #0a0a12
    card rgba(255,255,255,0.05)
  }
}

Generates CSS Custom Properties. Use everywhere: style { bg var(--colors-bg) }

⚡ Script Blocks (v0.6)

script {
  document.addEventListener('DOMContentLoaded', function() {
    console.log('Raw JS escape hatch');
  });
}

For the 5% of cases where declarative isn't enough. Raw JS, no mangling.

🔐 Data with Auth (v0.6)

data posts = get /api/posts auth

One keyword. Bearer token from localStorage. Automatic.

📐 Layout System (v0.3+)

layout {
  nav { link "Home" href="/", link "About" href="/about" }
  slot
  footer { p "Made with NyxCode" }
}

page / { h1 "Home" }
page /about { h1 "About" }

One layout wraps all pages. slot = page content. Next.js layout.tsx: 15 lines. NyxCode: 3.

⚡ Reactive State

state count = 0
computed double = count * 2
h1 count
button "+" -> count = count + 1

One keyword. Auto-updating DOM. No hooks, no boilerplate.

🧩 Components with Props

component Card {
  props title description
  style { bg #1a1a2e, radius 12px, padding 2rem }
  h3 .title
  p .description
}

page / { Card title="NyxCode" description="AI-native language" }

Default props: props title="Untitled". Scoped styles. Slot support.

🎨 3-Tier Styling

# Shorthand (90% of cases)
style { bg #1a1a2e, padding 2rem, radius 12px }

# Hover + responsive
style {
  bg linear-gradient(135deg, #667eea, #764ba2)
  hover { transform translateY(-4px) }
  @mobile { padding 1rem }
}

# Raw CSS
head "<style>.custom { animation: spin 1s infinite; }</style>"

📄 Multi-File Static (SSG)

One .nyx → multiple HTML files. Each page = standalone with SEO tags.

npx @fabudde/nyxcode build docs.nyx
# ✅ Built: 12 pages to dist-site/

No JS router on static sites. Plain <a href>. Zero JavaScript.

🔒 Secure by Default

• No eval() — safe expression evaluator only
• Auto HTML escaping
• bcrypt password hashing
• JWT with expiry
• Rate limiting on auth endpoints
• SQL injection structurally impossible

Audited by Tyto 🦉 (Security Advisor)

Benchmark

Live Sites Built with NyxCode

• 🌐 nyxcode.io — Docs (built in NyxCode)
• 🎯 demo.nyxcode.io — Full-stack demo (forms + auth + blog)
• 💼 fabianbudde.com — Portfolio
• 🐺 rudel.fun — Kiro's pack page
• 🦉 heytyto.dev — Tyto's bio

CLI

npx @fabudde/nyxcode build page.nyx           # Compile to HTML (+ server.js if full-stack)
npx @fabudde/nyxcode dev page.nyx             # Dev server + hot reload
npx @fabudde/nyxcode dev page.nyx --port=8080 # Custom port
npx @fabudde/nyxcode parse page.nyx           # Output AST as JSON
npx @fabudde/nyxcode tokens page.nyx          # Show token stream

AI Integration

Give NYXCODE.md to any LLM to generate NyxCode. It contains the complete language reference with examples. AIs learn by example, not rules.

# Copy to clipboard / attach to prompt
cat node_modules/@fabudde/nyxcode/NYXCODE.md

VS Code Extension

Syntax highlighting for .nyx files — 17 pattern groups, 33 regex patterns.

# Download from nyxcode.io
# VS Code → Extensions → ⋮ → Install from VSIX

Roadmap

• v0.1 — Parser + Compiler + CLI
• v0.2 — Reactivity, Components, npm
• v0.3 — Multi-file SSG, Layouts, Validator, VS Code Extension
• v0.4 — Default Props, Dev Server, Hot Reload, --watch
• v0.5 — Full-Stack: Tables, Security, Backend Compiler, Auth
• v0.6 — Native Forms, Theme Variables, Script Blocks, Data Auth ← current
• v0.7 — Validation keywords, file uploads, Vercel/Railway adapter
• v1.0 — Production ready

Created By

A human and three AIs building the language that bridges both worlds.

License

MIT — Copyright (c) 2026 Fabian Budde, Nyx & Tyto

6 versions in 2 days. The Rudel ships different. 🦞