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 medy-gribkov/arcana --skill particle-systemsgit clone --depth 1 https://github.com/medy-gribkov/arcanaWrote 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/medy-gribkov/arcana/particle-systems)<a href="https://agentmods.dev/skills/medy-gribkov/arcana/particle-systems"><img src="https://agentmods.dev/badge/skills/medy-gribkov/arcana/particle-systems/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/medy-gribkov/arcana/particle-systems"><img src="https://agentmods.dev/badge/skills/medy-gribkov/arcana/particle-systems.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 | $0.00024 | $0.03568 |
| Opus 5 | $0.00012 | $0.01784 |
| Sonnet 5 | $0.00005 | $0.00714 |
| Haiku 4.5 | $0.00002 | $0.00357 |
Grade A, and why
particle-systems 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 12d 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 — 480 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Particle Systems
Particle System Architecture
┌─────────────────────────────────────────────────────────────┐
│ PARTICLE LIFECYCLE │
├─────────────────────────────────────────────────────────────┤
│ EMISSION │
│ ├─ Spawn Rate (particles/second) │
│ ├─ Burst (instant spawn count) │
│ └─ Shape (point, sphere, cone, mesh) │
│ ↓ │
│ SIMULATION │
│ ├─ Velocity (initial + over lifetime) │
│ ├─ Forces (gravity, wind, turbulence) │
│ ├─ Collision (world, depth buffer) │
│ └─ Noise (procedural movement) │
│ ↓ │
│ RENDERING │
│ ├─ Billboard (camera-facing quads) │
│ ├─ Mesh (3D geometry per particle) │
│ ├─ Trail (ribbon following path) │
│ └─ GPU Instancing (batched draw) │
│ ↓ │
│ DEATH │
│ └─ Lifetime expired → recycle or destroy │
└─────────────────────────────────────────────────────────────┘
Common Effect Recipes
EXPLOSION EFFECT:
┌─────────────────────────────────────────────────────────────┐
│ LAYERS: │
│ 1. Flash (instant, bright, 0.1s) │
│ 2. Core fireball (expanding sphere, 0.3s) │
│ 3. Debris (physics-enabled chunks, 1-2s) │
│ 4. Smoke (slow rising, fade out, 2-3s) │
│ 5. Sparks (fast, gravity-affected, 0.5-1s) │
│ 6. Shockwave (expanding ring, 0.2s) │
│ │
│ SETTINGS: │
│ • Emission: Burst only (no rate) │
│ • Start speed: 5-20 (varies by layer) │
│ • Gravity: -9.8 for debris, 0 for smoke │
│ • Color: Orange→Red→Black over lifetime │
│ • Size: Start large, shrink (fireball) or grow (smoke) │
└─────────────────────────────────────────────────────────────┘
FIRE EFFECT:
┌─────────────────────────────────────────────────────────────┐
│ LAYERS: │
│ 1. Core flame (upward, orange-yellow, looping) │
│ 2. Ember particles (small, floating up) │
│ 3. Smoke (dark, rises above flame) │
│ 4. Light source (flickering point light) │
│ │
│ SETTINGS: │
│ • Emission: Continuous (50-100/sec) │
│ • Velocity: Upward (2-5 units/sec) │
│ • Noise: Turbulence for natural movement │
│ • Color: White→Yellow→Orange→Red over lifetime │
│ • Size: Start small, grow, then shrink │
│ • Blend: Additive for glow effect │
└─────────────────────────────────────────────────────────────┘
MAGIC SPELL EFFECT:
┌─────────────────────────────────────────────────────────────┐
│ LAYERS: │
│ 1. Core glow (pulsing, bright center) │
│ 2. Orbiting particles (circle around core) │
│ 3. Trail particles (follow movement path) │
│ 4. Impact burst (on hit/destination) │
│ 5. Residual sparkles (lingering after effect) │
│ │
│ SETTINGS: │
│ • Emission: Rate + burst on cast/impact │
│ • Velocity: Custom curves for orbiting │
│ • Trails: Enable for mystical streaks │
│ • Color: Themed to element (blue=ice, red=fire) │
│ • Blend: Additive for ethereal glow │
└─────────────────────────────────────────────────────────────┘
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 480 lines · 24 tokens per session scan A afdf3d6ae2c9
particle-systems is a skill published in the GitHub repository medy-gribkov/arcana (1 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 24 tokens to every session and 3,568 once invoked, about $0.0001 per session on Opus 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.
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