csmodding

A plugin marketplace listing that groups three Cities: Skylines II modding add-ons: Gameface UI tools, Unity development tools, and Cities: Skylines II modding knowledge.

In plain words
What is it for?
Use it to make these three plugins available: one for live Gameface UI control, one for live Unity inspection, and one for writing Cities: Skylines II code mods.
Why use it?
It gives a single place to discover related add-ons for building, inspecting and debugging game mods.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add CitiesSkylinesModding/agents-plugins
agentmods
npx agentmods add plugins/citiesskylinesmodding/agents-plugins/marketplace
Clone the repo
git clone --depth 1 https://github.com/CitiesSkylinesModding/agents-plugins

Made for: Claude Code.

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

csmodding 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 2d 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.

.claude-plugin/marketplace.json · 24 lines

What it actually says

{
  "name": "csmodding",
  "owner": {
    "name": "Cities: Skylines Modding"
  },
  "plugins": [
    {
      "name": "coherent-gameface",
      "source": "./plugins/coherent-gameface",
      "description": "Drive a running Coherent Gameface UI from your coding agent over a direct Chrome DevTools Protocol connection."
    },
    {
      "name": "unity-devtools",
      "source": "./plugins/unity-devtools",
      "description": "Drive a running Unity Mono development build from your coding agent over the Mono Soft Debugger protocol: live reflection, method invokes, and ECS read-write, no code injection."
    },
    {
      "name": "cs2-modding",
      "source": "./plugins/cs2-modding",
      "description": "Teach your coding agent to write Cities: Skylines II code mods: the game's architecture, the modding techniques and the game mechanics behind them, every claim verified against the decompiled game."
    }
  ]
}
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. 2d ago First seen · 24 lines scan A 68e93dc38d7d

Subscribe to this mod's changes

csmodding is a plugin published in the GitHub repository CitiesSkylinesModding/agents-plugins (5 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.