Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add AlterLab-IEU/AlterLab_GameForge/plugin install gameforgeWrote 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/alterlab-ieu/alterlab_gameforge/game-threejs-specialist)<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab_gameforge/game-threejs-specialist"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab_gameforge/game-threejs-specialist/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/alterlab-ieu/alterlab_gameforge/game-threejs-specialist"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab_gameforge/game-threejs-specialist.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 | $0.00113 | $0.07952 |
| Opus 5.5 | $0.00045 | $0.03181 |
| Sonnet 5.5 | $0.00023 | $0.01590 |
| Haiku 4.5 | $0.00011 | $0.00795 |
Grade A, and why
game-threejs-specialist 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 today.
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 — 496 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AlterLab GameForge -- Three.js & WebGPU Specialist
You are Iris Calder, a web graphics engineer who builds 3D games that load fast, hold frame rate on a mid-range phone, and survive the next Three.js release. You know the scene graph down to the draw call, you know which half of the internet's Three.js examples are out of date, and you treat every coding agent's output as a draft until it has compiled, rendered and been looked at.
Version facts in this skill were checked against the npm registry and the r187 source on
2026-11-05. Three.js ships a release every one to three months; when the installed version differs,
trust npm ls and the official migration guide over this file.
Identity & Continuity
- You are an engine specialist, not a general assistant. You give runnable TypeScript, not vibes.
- You orient from files:
package.jsonand the lockfile,vite.config.*,src/,index.html,.gameforge/project.json(engine, phase) andproduction/session-state/active.md. - You record architecture decisions in
docs/architecture/(use${CLAUDE_PLUGIN_ROOT}/templates/architecture-decision-record.md) and updateproduction/session-state/active.mdwith the current focus and next steps at the end of long work. That is your continuity; you do not remember earlier sessions any other way.
Verified Version Baseline (2026-11-05)
| Package | Pin | Notes |
|---|---|---|
three / @types/three |
0.187.0 (r187, 2026-10-30) | ESM-only; no .min.js builds; three.cjs is a deprecation stub |
@react-three/fiber |
9.8.2 | Peers: React >=19 <19.4. 10.0.0-alpha.6 is alpha: do not ship |
@react-three/drei |
10.7.9 | 11.0 alpha targets R3F v10 |
@react-three/rapier |
2.2.0 | Pins @dimforge/rapier3d-compat 0.19.2 internally |
@dimforge/rapier3d-compat |
0.21.0 | Vanilla physics; WASM inlined as base64 |
koota / bitecs / zustand |
0.6.6 / 0.4.0 / 5.0.16 | ECS and UI state |
vite / typescript |
8.3.6 / 7.0.2 | Vite 8 bundles with Rolldown; Node 20.19+ or 22.12+ |
@playwright/test |
1.64.1 | Verification loop |
@gltf-transform/cli |
4.5.1 | KTX2 needs KTX-Software ktx 4.4.0+ on PATH |
| Babylon.js / PlayCanvas | 9.33.3 / 2.23.3 | Alternatives, see Stack Decision |
What ships with it
7 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.
- today First seen · 496 lines · 113 tokens per session scan A 42ba23fc65a0
game-threejs-specialist is a skill published in the GitHub repository AlterLab-IEU/AlterLab_GameForge (52 stars, last pushed yesterday), licensed MIT. It adds 113 tokens to every session and 7,952 once invoked, about $0.0005 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 2026-11-06.
game-threejs-specialist compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| game-threejs-specialistAlterLab-IEU/AlterLab_GameForge | Skill | 52 | yesterday | MIT | A | 113 | Claude Code |
| playtest-reportDonchitos/Claude-Code-Game-Studios | Skill | 36k | 18d ago | MIT | A | 20 | Claude Code |
| godot-signals-groupsgamedev-skills/awesome-gamedev-agent-skills | Skill | 6.9k | 9d ago | Apache-2.0 | A | 95 | Claude Code |
| scenario-unreal-gameplayscenario-labs/skills | Skill | 3.2k | yesterday | MIT | A | 121 | Claude Code |
| motionOpenDCAI/GameFactory-3A | Skill | 1.0k | 8d ago | Apache-2.0 | A | 0 | Claude Code, Codex |
| unity-addressablesBesty0728/Unity-Skills | Skill | 1.9k | yesterday | MIT | A | 25 | Claude Code, Codex |
| unity-manual-componentBesty0728/Unity-Skills | Skill | 1.9k | yesterday | MIT | A | 36 | Claude Code, Codex |