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 maystudios/claude-skills --skill unreal-best-practicesgit clone --depth 1 https://github.com/maystudios/claude-skillsWrote 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/maystudios/claude-skills/unreal-best-practices)<a href="https://agentmods.dev/skills/maystudios/claude-skills/unreal-best-practices"><img src="https://agentmods.dev/badge/skills/maystudios/claude-skills/unreal-best-practices/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/maystudios/claude-skills/unreal-best-practices"><img src="https://agentmods.dev/badge/skills/maystudios/claude-skills/unreal-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00207 | $0.02658 |
| Opus 5.5 | $0.00083 | $0.01063 |
| Sonnet 5.5 | $0.00041 | $0.00532 |
| Haiku 4.5 | $0.00021 | $0.00266 |
Grade A, and why
unreal-best-practices 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 — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Unreal Engine 5.x Best Practices Guide
The "Research First" Principle
Before implementing any gameplay system, always investigate whether Epic provides a newer, purpose-built system for it. Epic Games continuously introduces modern frameworks that replace ad-hoc solutions. Using the latest recommended system yields better performance, easier networking, designer-friendly workflows, and future compatibility.
Workflow:
- Identify the problem domain (input, abilities, audio, particles, AI, UI, movement, etc.)
- Check the Modern Systems Quick Reference below
- If uncertain, search Epic's documentation and the UE Public Roadmap for the latest system status
- Prefer production-ready modern systems over legacy approaches
- For experimental systems: evaluate maturity before committing -- use them in prototypes, not shipping builds
Why this matters: Epic signals their direction through actions, not just announcements. When they rebuild the First/Third Person templates to use GAS and Enhanced Input, or when Fortnite ships with Game Feature Plugins and CommonUI, that is the clearest indicator of where the ecosystem is heading.
Official Documentation (always consult for latest details)
| Source | URL |
|---|---|
| Epic Documentation Hub | https://dev.epicgames.com/documentation/en-us/unreal-engine |
| UE Public Roadmap | https://portal.productboard.com/epicgames/1-unreal-engine-public-roadmap |
| Lyra Sample Project | https://dev.epicgames.com/documentation/en-us/unreal-engine/lyra-sample-game-in-unreal-engine |
| UE Release Notes | https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-release-notes |
| Epic Community Tutorials | https://dev.epicgames.com/community/learning |
| Experimental Features List | https://dev.epicgames.com/documentation/en-us/unreal-engine/experimental-features |
| Allar's UE5 Style Guide | https://github.com/Allar/ue5-style-guide |
| Tom Looman's UE5 Guides | https://tomlooman.com |
| X157 Dev Notes (Lyra) | https://x157.github.io/UE5/ |
What ships with it
5 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.
- 2mo ago First seen · 179 lines · 207 tokens per session scan A 1fb4429bd3e8
unreal-best-practices is a skill published in the GitHub repository maystudios/claude-skills (26 stars, last pushed 2mo ago), licensed MIT. It adds 207 tokens to every session and 2,658 once invoked, about $0.0008 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 2026-08-30.
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