Claude Skills by CitiesSkylinesModding

Coherent Labs published their own Gameface MCP server in August 2026 under MIT. It ships a documentation corpus of roughly 6,400 lines across twenty topic files, distilled from the Gameface docs by the people who build the engine, and exposed as MCP resources with a search tool over it.

Operating manual for driving a live Gameface UI with the game_* MCP tools: procedures and traps. Load before first use of the input tools (game_click, game_fill, game_type, game_key, game_hover) or of any game_debug_* tool. Also use when verifying UI changes against a running game, when waiting for a mod rebuild to go live in-game, or when a game_* call fails or returns puzzling results. Engine support questions (does this CSS/JS/layout feature exist) belong to the gameface skill.

Coherent Gameface (Cohtml) domain knowledge for the game-UI middleware that renders HTML/CSS/JS inside games (Cities: Skylines II and many others). Use when writing or debugging UI that runs in a Gameface view, when HTML/CSS/JS behaves differently in the game than in a browser, when checking whether a web feature exists in a game's Cohtml version, or when working with data-bind-* attributes or the engine JS API. Also the domain reference for skills that drive a Gameface UI via the game_* tools.

The official Cities: Skylines II modding toolchain. Use when the user wants to start a CS2 mod project, when a mod build or its post-processing fails, when a mod they just built does not appear in the game, or when they are publishing or updating one.

Provisions and maintains the local ground truth for Cities: Skylines II mod development. Use when the user asks to be set up for CS2 modding, when the decompile or the readable copy of the game UI bundle needs creating or updating, when they ask which mods are worth reading for a problem, when the in-game debug menu or the UI debugging port turns out to be unavailable, or when another skill finds no local source recorded.

How Cities: Skylines II is built and how a mod changes it. Use when writing or debugging CS2 mod code, when deciding how to change something the game simulates, when locating the systems, components or prefab data behind a game mechanic, or when a mod runs at the wrong moment, breaks another mod, or does not survive a save.

Driving a live Unity Mono development build with the unity MCP tools. Load before first use of any unity tool, when planning multi-step live state edits, or when a unity tool call fails or returns puzzling results.

The Cities: Skylines II mod UI discipline: the C#-to-JavaScript binding layer and the game''s React frontend. Use when a mod needs a panel, button or overlay in the game''s UI, when exposing C# state to the frontend or invoking C# from it, when injecting into the game''s own component tree, when a UI mod''s bundle does not load or its styles do not apply, or when checking what the game''s frontend already provides.