agentmods.dev

summer-engine

summer-engine is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from SummerEngine/summer-engine-agent. Its token cost is not measured, scanned A, original, MIT.

A local game-building engine that coding agents can connect to through an MCP server, a standard way for software tools to exchange commands and data. It runs from an npm package and supports agents such as Claude Code, Cursor, Codex, and Gemini.

In plain words
What is it for?
Use it to install and run Summer Engine, connect coding agents, and build games with its bundled skills, hooks, and plugins.
Why use it?
It gives agents a local setup for building and running games without requiring the engine to be hosted elsewhere.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Part of the summer plugin — 80 skills, 2 commands, 2 hooks, 1 MCP server shipped together

not rated 57 today A scan tokens not measured original MIT
View the source file SummerEngine/summer-engine-agent
Install

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.

agentmods
npx agentmods add mcp/summerengine/summer-engine-agent/summer-engine
Clone the repo
git clone --depth 1 https://github.com/SummerEngine/summer-engine-agent

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Or install summer, the plugin that ships this one along with the rest of its 80 skills, 2 commands, 2 hooks, 1 MCP server.

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.

agentmods badge for summer-engine

README.md
[![agentmods](https://agentmods.dev/badge/mcp/summerengine/summer-engine-agent/summer-engine.svg)](https://agentmods.dev/mcp/summerengine/summer-engine-agent/summer-engine)
Your own site
<a href="https://agentmods.dev/mcp/summerengine/summer-engine-agent/summer-engine"><img src="https://agentmods.dev/badge/mcp/summerengine/summer-engine-agent/summer-engine.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

summer-engine 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 5d 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.

.mcp.json · 9 lines

What it actually says

{
  "summer-engine": {
    "command": "npx",
    "args": [
      "summer-engine",
      "mcp"
    ]
  }
}
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.

  1. 5d ago First seen · 9 lines scan A 1cea6154ce3a

Subscribe to this mod's changes

summer-engine is an MCP server published in the GitHub repository SummerEngine/summer-engine-agent (57 stars, last pushed today), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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.

Building agentsGame developmentaiai-game-developmentai-game-enginegame-developmentgame-engine
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