Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add CK42BB/procedural-stars-threejs --skill procedural-stars-threejsgit clone --depth 1 https://github.com/CK42BB/procedural-stars-threejsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ck42bb/procedural-stars-threejs/procedural-stars-threejs)<a href="https://agentmods.dev/skills/ck42bb/procedural-stars-threejs/procedural-stars-threejs"><img src="https://agentmods.dev/badge/skills/ck42bb/procedural-stars-threejs/procedural-stars-threejs/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ck42bb/procedural-stars-threejs/procedural-stars-threejs"><img src="https://agentmods.dev/badge/skills/ck42bb/procedural-stars-threejs/procedural-stars-threejs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00226 | $0.08031 |
| Opus 5.5 | $0.00090 | $0.03212 |
| Sonnet 5.5 | $0.00045 | $0.01606 |
| Haiku 4.5 | $0.00023 | $0.00803 |
Grade A, and why
procedural-starfield scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 798 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Procedural Starfield & Celestial Phenomena
Generate breathtaking night skies in Three.js — from photorealistic starfields to dreamy nebulae to dramatic celestial events.
Architecture Overview
┌──────────────────────────────────────────────────────┐
│ Night Sky Pipeline │
│ │
│ SkyController (master orchestrator) │
│ ├── time progression (sunset → night → dawn) │
│ ├── moon phase + position │
│ └── drives all layers: │
│ │
│ ┌─ Layer 1: Sky Dome ──────────────────────────┐ │
│ │ Gradient background, horizon glow, zodiacal │ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 2: Stars ─────────────────────────────┐ │
│ │ Points with spectral color + magnitude │ │
│ │ Twinkle, proper motion (optional) │ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 3: Milky Way ─────────────────────────┐ │
│ │ Textured band or procedural FBM glow │ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 4: Nebulae ───────────────────────────┐ │
│ │ Volumetric raymarched or billboard sprites │ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 5: Celestial Bodies ──────────────────┐ │
│ │ Moon (phase lit), planets, sun glow │ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 6: Transients ────────────────────────┐ │
│ │ Shooting stars, comets, eclipses, satellites│ │
│ └──────────────────────────────────────────────┘ │
│ ┌─ Layer 7: Deep Space (optional) ─────────────┐ │
│ │ Distant galaxies, star clusters, dust lanes │ │
│ └──────────────────────────────────────────────┘ │
└──────────────────────────────────────────────────────┘
Renderer Setup
import * as THREE from 'three';
async function createRenderer(canvas) {
let renderer, gpuAvailable = false;
try {
const WebGPU = (await import('three/addons/capabilities/WebGPU.js')).default;
if (WebGPU.isAvailable()) {
const { default: WebGPURenderer } = await import(
'three/addons/renderers/webgpu/WebGPURenderer.js'
);
renderer = new WebGPURenderer({ canvas, antialias: true });
await renderer.init();
gpuAvailable = true;
}
} catch (e) {}
if (!renderer) {
renderer = new THREE.WebGLRenderer({ canvas, antialias: true });
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 1.0;
}
renderer.setSize(innerWidth, innerHeight);
renderer.setPixelRatio(Math.min(devicePixelRatio, 2));
return { renderer, gpuAvailable };
}
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 798 lines · 226 tokens per session scan A 34421bfa3075
procedural-starfield is a skill published in the GitHub repository CK42BB/procedural-stars-threejs (8 stars, last pushed 9mo ago), licensed MIT. It adds 226 tokens to every session and 8,031 once invoked, about $0.0009 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
procedural-starfield compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| procedural-starfieldCK42BB/procedural-stars-threejs | Skill | 8 | 9mo ago | MIT | A | 226 | Claude Code, Codex |
| exploratory-data-analysisK-Dense-AI/scientific-agent-skills | Skill | 56k | 4d ago | MIT | A | 83 | Claude Code |
| webhook-managementhoangsonww/Claude-Code-Agent-Monitor | Skill | 1.1k | yesterday | MIT | A | 56 | Claude Code, Codex |
| gesellschaftsrechtliche-satzungen-agbKlotzkette/claude-fuer-deutsches-recht | Skill | 1.8k | yesterday | Apache-2.0 | A | 69 | Claude Code |
| accessibility-patternsvibeeval/vibecosystem | Skill | 539 | 2d ago | MIT | A | 24 | Claude Code, Codex |
| design-reviewjezweb/claude-skills | Skill | 1.1k | 28d ago | MIT | A | 108 | Claude Code |
| react-patternsjezweb/claude-skills | Skill | 1.1k | 28d ago | MIT | A | 110 | Claude Code |