What is windows-steam-on-apple-silicon AGENTS.md?

A procedure for running the Windows Steam client and Windows-only games on an Apple Silicon Mac through Sikarugir, a compatibility layer for running Windows software on macOS.

It helps install Sikarugir, fetch its engine and template, configure DirectX 11/12 support, launch Steam, and complete the setup.

It lays out the required setup order, version details, cache locations, and the steps where the user must interact with the installer or launcher.

How mirpo/windows-steam-on-apple-silicon configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to mirpo/windows-steam-on-apple-silicon. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/mirpo/windows-steam-on-apple-silicon/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/mirpo/windows-steam-on-apple-silicon

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/mirpo/windows-steam-on-apple-silicon/agents-md/github.svg)](https://agentmods.dev/instructions/mirpo/windows-steam-on-apple-silicon/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/mirpo/windows-steam-on-apple-silicon/agents-md"><img src="https://agentmods.dev/badge/instructions/mirpo/windows-steam-on-apple-silicon/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/mirpo/windows-steam-on-apple-silicon/agents-md"><img src="https://agentmods.dev/badge/instructions/mirpo/windows-steam-on-apple-silicon/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,432 This file is loaded in full into every session.

When invoked 3,432 The same file — it is already loaded in full.

Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.03432	$0.03432
Opus 5.5	$0.01373	$0.01373
Sonnet 5.5	$0.00686	$0.00686
Haiku 4.5	$0.00343	$0.00343

Measured 2mo ago against content hash a577b645e80e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

windows-steam-on-apple-silicon AGENTS.md scanned grade C with 2 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf "$tmp"

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fL -o "$CACHE/Engines/WS12WineSikarugir10.0_6.tar.xz" \

AGENTS.md · 226 lines

How it starts

The opening of the file, as written. The whole thing — 226 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Windows Steam on Apple Silicon via Sikarugir

Machine-readable facts for LLM agents helping a user with this task. Self-contained: you do not need the other files. Dense on purpose. Human walkthrough: README.md. Automated path: sikarugir-steam-setup.sh (offer it, but many users prefer running commands themselves — the commands below are the same ones, in order).

Task: run the Windows Steam client, and Windows-only games, on an Apple Silicon Mac using Sikarugir (Wineskin's successor, formerly Kegworks), with D3DMetal for DirectX 11/12.

The whole procedure

Seven steps, in order. Steps 5 and 7 need the user at the mouse; the rest is non-interactive. sikarugir-steam-setup.sh runs exactly this, plus preflight checks and idempotency guards.

WRAPPER="$HOME/Applications/Sikarugir/Steam.app"
CACHE="$HOME/Library/Application Support/Sikarugir"
LAUNCH="$WRAPPER/Contents/MacOS/Sikarugir"

# 1. Install Sikarugir Creator (Homebrew 6.x requires explicit tap trust)
brew trust Sikarugir-App/sikarugir
brew install --cask Sikarugir-App/sikarugir/sikarugir

# 2. Fetch engine + template into Sikarugir's own cache dir.
#    The engine version below is mandatory — see "Decisive fact" right after this block.
mkdir -p "$CACHE/Engines" "$CACHE/Template" "$HOME/Applications/Sikarugir"
curl -fL -o "$CACHE/Engines/WS12WineSikarugir10.0_6.tar.xz" \
  https://github.com/Sikarugir-App/Engines/releases/download/v1.0/WS12WineSikarugir10.0_6.tar.xz
curl -fL -o "$CACHE/Template/Template-1.0.11.tar.xz" \
  https://github.com/Sikarugir-App/Wrapper/releases/download/v1.0/Template-1.0.11.tar.xz

# 3. Assemble wrapper = template .app + engine at Contents/SharedSupport/wine
tmp="$(mktemp -d)"
tar -xf "$CACHE/Template/Template-1.0.11.tar.xz" -C "$tmp"
cp -R "$tmp/Template-1.0.11.app" "$WRAPPER"
tar -xf "$CACHE/Engines/WS12WineSikarugir10.0_6.tar.xz" -C "$WRAPPER/Contents/SharedSupport"
mv "$WRAPPER/Contents/SharedSupport/wswine.bundle" "$WRAPPER/Contents/SharedSupport/wine"
rm -rf "$tmp"

# 4. Create the prefix  → expect "Primary run"; verify BOTH Program Files trees exist
"$LAUNCH" WSS-wineprefixcreate
ls "$WRAPPER/Contents/drive_c"     # need "Program Files" AND "Program Files (x86)"

# 5. Install the Windows Steam client (GUI wizard; keep the default path)
curl -fL -o "$HOME/Applications/Sikarugir/SteamSetup.exe" \
  https://cdn.akamai.steamstatic.com/client/installer/SteamSetup.exe
"$LAUNCH" WSS-installer "$HOME/Applications/Sikarugir/SteamSetup.exe"

# 6. Configure via plutil — no GUI needed. Paths are relative to drive_c.
PLIST="$WRAPPER/Contents/Info.plist"
plutil -replace "D3DMETAL" -integer 1 "$PLIST"
plutil -replace "Program Name and Path" -string "/Program Files (x86)/Steam/Steam.exe" "$PLIST"
plutil -replace "Skip Gecko" -integer 1 "$PLIST"
plutil -replace "Skip Mono"  -integer 1 "$PLIST"

# 7. Launch, then the user logs in
open "$WRAPPER"

Read the full file on GitHub · 226 lines

Changes

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 · 226 lines · 3,432 tokens per session scan C a577b645e80e

Subscribe to this mod's changes

windows-steam-on-apple-silicon AGENTS.md is an instructions file published in the GitHub repository mirpo/windows-steam-on-apple-silicon (6 stars, last pushed 3mo ago), licensed CC0-1.0. It adds 3,432 tokens to every session, about $0.0137 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Apple Silicon d3dmetal gaming-on-mac kegworks macos sikarugir

windows-steam-on-apple-silicon AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
windows-steam-on-apple-silicon AGENTS.mdmirpo/windows-steam-on-apple-silicon	Instructions file	6	3mo ago	CC0-1.0	C	3,432	Codex, OpenCode
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windows-steam-on-apple-silicon: Instructions file for Codex