Getting it into your agent
There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.
Wrote 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/lichamnesia/unreal-engine-agent-skills/ue5-macos-apple-silicon)<a href="https://agentmods.dev/skills/lichamnesia/unreal-engine-agent-skills/ue5-macos-apple-silicon"><img src="https://agentmods.dev/badge/skills/lichamnesia/unreal-engine-agent-skills/ue5-macos-apple-silicon/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/lichamnesia/unreal-engine-agent-skills/ue5-macos-apple-silicon"><img src="https://agentmods.dev/badge/skills/lichamnesia/unreal-engine-agent-skills/ue5-macos-apple-silicon.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 | $0.00158 | $0.01665 |
| Opus 5 | $0.00079 | $0.00833 |
| Sonnet 5 | $0.00032 | $0.00333 |
| Haiku 4.5 | $0.00016 | $0.00167 |
Grade A, and why
ue5-macos-apple-silicon 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 11d 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 — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UE5 on macOS and Apple Silicon
UE5 material defaults to Windows. Validation scripts are PowerShell, build commands are
Build.bat, and performance advice assumes tooling that does not exist here. On a Mac,
following it produces confident, wrong instructions.
The engine's macOS support is real and has improved substantially — but "supported" and "identical to Windows" are different claims, and the gap is where a week disappears.
Discover before you build
- Never assume the engine path or version. Launcher installs, source builds, and
multiple side-by-side versions all coexist on Macs. Run the discovery sequence in
references/environment-audit.mdand write the results into the project context file (ue5-project-context). - Establish the Xcode situation. Xcode version, whether command line tools are selected, and whether the license has been accepted. A failed build here reports as a compiler error with no mention of licensing, which is why it costs so much time.
- Decide the architecture target early: arm64 only, or a universal binary. This changes
build time, package size, and the flags in every command afterward. See
references/build-and-package.md. - Establish what Metal will actually give you on this chip and this macOS version,
before designing around a rendering feature. See
references/metal-feature-reality.md. Feature availability depends on both the chip generation and the OS version, and the failure mode is silent fallback, not an error. - Fix the profiling toolchain now, not at optimization time. Several Windows-standard
tools have no macOS equivalent; know which ones you have before you need them. See
references/profiling-on-mac.md. - Translate Windows instructions rather than following them. Keep the translation table
in
references/windows-to-mac.mdat hand when reading any other skill pack. - Record every command that succeeded, with its absolute path and date. On macOS the paths contain spaces and version numbers; a remembered command is a broken command.
What ships with it
6 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.
- 11d ago First seen · 115 lines · 158 tokens per session scan A 5e470ccc9271
ue5-macos-apple-silicon is a skill published in the GitHub repository LichAmnesia/unreal-engine-agent-skills (5 stars, last pushed 27d ago), licensed MIT. It adds 158 tokens to every session and 1,665 once invoked, about $0.0008 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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