gameface SKILL.md skillA

gameface from citiesskylinesmodding/agents-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add citiesskylinesmodding/agents-plugins/gameface@git:20260929.d402c7e

Pins git:20260929.d402c7e in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
citiesskylinesmodding/agents-plugins
Path
plugins/coherent-gameface/skills/gameface/SKILL.md
Versions recorded
8
Latest version
git:20260929.d402c7e, committed Sep 29, 2026
First version recorded
Jul 14, 2026
Size
11,073 bytes
Repository stars
8
License
MIT

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.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Gameface

Gameface renders game UI from HTML/CSS/JS.
It is powered by Cohtml (the HTML engine) and Renoir (the rendering engine), proprietary technology that is not WebKit, Chromium, or Gecko, and not a WebView.
JavaScript runs on V8.
Gameface implements a deliberate subset of HTML5/CSS3 chosen for game-UI performance: an unsupported HTML element is not an error, it lays out as a generic unstyled flex box with no semantics, and unsupported CSS is silently ignored.
(The older Coherent UI product was Chromium-based; search results about it do not describe Gameface.)
This skill is written against docs v3.0.3.1, with Cities: Skylines II (CS2) as the reference target and worked example throughout.

Verified against Cohtml 2.2.1.3.
A `VOLATILE:` marker labels a claim the engine version moves, naming what moves and where to re-check it: the claim held on the reference target at the version above.

## The map and the territory

The docs are the map; the running game is the territory.
Three rules keep them straight:

1. **The docs describe the latest Gameface only.** Support tables carry no "since version" annotations.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add citiesskylinesmodding/agents-plugins/gameface@sha256:e5ad3e8990ce3a76

The line at the top of this page pins the label git:20260929.d402c7e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_rgwb43e6xzpnfagm.svg)](https://markdownregistry.com/a/art_rgwb43e6xzpnfagm)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 8 versions of this file, between Jul 14, 2026 and Sep 29, 2026, about one every 11 days.

versioncommittedcommitsizeaudit
git:20260929.d402c7e latest2026-09-29 d402c7e 11,073 BA view · diff
git:20260919.4f3cf382026-09-19 4f3cf38 10,858 BA view · diff
git:20260919.29ab9752026-09-19 29ab975 10,730 BA view · diff
git:20260822.a77f2342026-08-22 a77f234 9,919 BA view · diff
git:20260811.31ff2922026-08-11 31ff292 9,839 BA view · diff
git:20260809.f58b2892026-08-09 f58b289 9,831 BA view · diff
git:20260730.43e2bc92026-07-30 43e2bc9 11,167 BA view · diff
git:20260714.660dc002026-07-14 660dc00 11,181 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (11073 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

citiesskylinesmodding/agents-plugins · 8 stars · license MIT · pushed 2026-11-04 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rgwb43e6xzpnfagm
GET https://markdownregistry.com/api/v1/resolve?ref=citiesskylinesmodding/agents-plugins/gameface
GET https://markdownregistry.com/api/v1/blob/e5ad3e8990ce3a7691ef4367c50d404ea827de488ff8ad7e9b3682fe5074059a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from citiesskylinesmodding/agents-plugins

cs2-game-update SKILL.md skill
citiesskylinesmodding/agents-plugins · .agents/skills/cs2-game-update/SKILL.md · Sweeps this repo''s Cities: Skylines II prose after a game update. Use when the game has updated, when the decompile…
git:20261102.4409b4d · audit A · 8 stars
gameface-update SKILL.md skill
citiesskylinesmodding/agents-plugins · .agents/skills/gameface-update/SKILL.md · Sweeps the coherent-gameface plugin after the reference target''s Cohtml moved. Use when the target''s embedded engine…
git:20260919.c47963a · audit A · 8 stars
scan-mcp-failures SKILL.md skill
citiesskylinesmodding/agents-plugins · .agents/skills/scan-mcp-failures/SKILL.md · Mines this machine's agent transcripts for failed gameface, unity and cs2-dev MCP calls, and turns them into roadmap…
git:20261102.ba5cd7f · audit A · 8 stars
terra-nil-debuggee SKILL.md skill
citiesskylinesmodding/agents-plugins · .agents/skills/terra-nil-debuggee/SKILL.md · Launches Terra Nil, a Unity game from this machine's Steam library, as a second debuggee for the unity MCP server. Use…
git:20261026.a69ba83 · audit A · 8 stars
AGENTS.md AGENTS.md file
citiesskylinesmodding/agents-plugins · AGENTS.md
git:20261102.ba5cd7f · audit A · 8 stars
CLAUDE.md CLAUDE.md file
citiesskylinesmodding/agents-plugins · CLAUDE.md
git:20260712.31ecf4f · audit B · 8 stars
AGENTS.md@plugins/coherent-gameface AGENTS.md file
citiesskylinesmodding/agents-plugins · plugins/coherent-gameface/AGENTS.md
git:20260919.4f3cf38 · audit A · 8 stars
CLAUDE.md@plugins/coherent-gameface CLAUDE.md file
citiesskylinesmodding/agents-plugins · plugins/coherent-gameface/CLAUDE.md
git:20260718.b39ee7e · audit B · 8 stars
gameface-driving SKILL.md skill
citiesskylinesmodding/agents-plugins · plugins/coherent-gameface/skills/gameface-driving/SKILL.md · Operating manual for driving a live Gameface UI with the game_* MCP tools: procedures and traps. Load before first use…
git:20260929.d402c7e · audit A · 8 stars
AGENTS.md@plugins/cs2-modding AGENTS.md file
citiesskylinesmodding/agents-plugins · plugins/cs2-modding/AGENTS.md
git:20261102.c2954dd · audit A · 8 stars
CLAUDE.md@plugins/cs2-modding CLAUDE.md file
citiesskylinesmodding/agents-plugins · plugins/cs2-modding/CLAUDE.md
git:20260801.d0b340b · audit B · 8 stars
cs2-mod-project SKILL.md skill
citiesskylinesmodding/agents-plugins · plugins/cs2-modding/skills/cs2-mod-project/SKILL.md · The official Cities: Skylines II modding toolchain. Use when the user wants to start a CS2 mod project, when the…
git:20261017.77105d0 · audit A · 8 stars

Every file in citiesskylinesmodding/agents-plugins

Browse by kind, by grade A, or by owner.