Maintainer of this skill?
Automated security scan — not a certification.
by drhelius
Sega Master System / Game Gear / SG-1000 emulator and debugger with embedded MCP server for macOS, Windows, Linux, BSD and RetroArch.
# Add to your Claude Code skills
git clone https://github.com/drhelius/GearsystemGuides for using mcp servers skills like Gearsystem.
Last scanned: 5/26/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-05-26T07:46:10.866Z",
"semgrepRan": false,
"npmAuditRan": true,
"pipAuditRan": true
}See how Gearsystem compares with popular alternatives.
Gearsystem is an open-source mcp servers skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by drhelius. Sega Master System / Game Gear / SG-1000 emulator and debugger with embedded MCP server for macOS, Windows, Linux, BSD and RetroArch. It has 395 GitHub stars.
Yes. Gearsystem passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
Clone the repository with "git clone https://github.com/drhelius/Gearsystem" and add it to your Claude Code skills directory (see the Installation section above).
Gearsystem is primarily written in C++. It is open-source under drhelius on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other MCP Servers skills you can browse and compare side by side. Open the MCP Servers category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh Gearsystem against similar tools.
No comments yet. Be the first to share your thoughts!
Top skills in this category by stars
30 days in the Featured rail · terms & refunds
⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
Automated security scan — not a certification.
Gearsystem is a very accurate, cross-platform Sega Master System / Game Gear / SG-1000 emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch, with an embedded MCP server for AI debugging and development.
This is an open source project with its ongoing development made possible thanks to the support by these awesome backers. If you find it useful, please consider sponsoring.
Don't hesitate to report bugs or ask for new features by opening an issue.
Notes:
brew trust --tap drhelius/geardomelibsdl3None in the Emulator menu. This emulates a machine without any media plugged in.Top+Bottom and Aspect Ratio Standard (4:3 DAR) in the Video menu. Game Gear will ignore any overscan settings.--portable, or create an empty file named portable.ini in the same directory as the application binary. On macOS, place the file next to the .app bundle.Link Cable in two desktop instances, select the same session, and connect both, or start each process with --link-session N. Select Auto, Gear-to-Gear, or Mark III under Protocol; the session is independent of this selection. Auto uses Gear-to-Gear for native Game Gear software and Mark III Joy-Joy for F-16 Fighting Falcon (Japan). For Mark III, Return, 1, 2, and Space are mapped to the SK-1100 keyboard. Reset the console if Mark III hardware is attached after startup. Independent instances should use separate application copies or --portable data directories so configuration, saves, and single-instance handling do not conflict.Emulator menu. When enabled, opening a ROM while another instance is running will send the ROM to the running instance instead of starting a new one.path_to_rom_file.sms it tries to load path_to_rom_file.sym. You can also load a symbol file using the GUI or the CLI. It supports sjasmplus/Pasmo (EQU), SDCC/NoICE (.noi), wla-dx and vasm/generic file formats.gearsystem [options] [rom_file] [symbol_file]
Arguments:
[rom_file] ROM file: accepts ROMs (.sms, .gg, .sg, .mv) or ZIP (.zip)
[symbol_file] Optional symbol file for debugging
Options:
-f, --fullscreen Start in fullscree