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 qfoldit/UEFN-TOOLBELT --skill game-designergit clone --depth 1 https://github.com/qfoldit/UEFN-TOOLBELTWrote 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/qfoldit/uefn-toolbelt/game-designer)<a href="https://agentmods.dev/skills/qfoldit/uefn-toolbelt/game-designer"><img src="https://agentmods.dev/badge/skills/qfoldit/uefn-toolbelt/game-designer/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/qfoldit/uefn-toolbelt/game-designer"><img src="https://agentmods.dev/badge/skills/qfoldit/uefn-toolbelt/game-designer.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 | $0.00161 | $0.00753 |
| Opus 5.5 | $0.00064 | $0.00301 |
| Sonnet 5.5 | $0.00032 | $0.00151 |
| Haiku 4.5 | $0.00016 | $0.00075 |
Grade A, and why
game-designer 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 1mo 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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 1mo ago First seen · 33 lines · 161 tokens per session scan A 641968c1cf96
game-designer is a skill published in the GitHub repository qfoldit/UEFN-TOOLBELT (6 stars, last pushed 16d ago), with no licence file. It adds 161 tokens to every session and 753 once invoked, about $0.0006 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.
Other skills, from other repositories
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add-permission
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atelier
Two-agent post-generation quality gate for vibe-coded applications. Deterministic, gradeable ruleset enforcing UI/UX design-system craft and backend architectural soundness.
session-handoff
Close out a work session on Arthur MCP by updating docs/HANDOFF.md and docs/ROADMAP.md and reporting which validation commands were run. Use at the end of a task, before telling the user work is complete.
externalize-operator
MUST READ before calling externalizeop or saveexternalization. Required workflow steps.
ue-mcp-workflow
Use when driving Unreal Engine editor via the ue-mcp MCP server. Covers the required order of operations (status check first), editor lifecycle, project scoping, and what to do when the bridge says "still initializing". Pulls in automatically any time the user asks to use an Unreal project or references ue-mcp tools.