Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Cities2 MCP and Modding Toolkit
Overview
Description from the maker (original English)
Cities: Skylines II wiki, encyclopedia, and mod workflow tools for AI agents.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs on your computer
- Transport: stdio
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- You fill in yourself:
CITIES2_MODS_DIR,CITIES2_GAME_DIR,CITIES2_LOCALE_COK
You need
- PyPIPython’s uv installed (for the uvx command)
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"cities2": {
"command": "uvx",
"args": [
"cities2-mcp"
],
"env": {
"CITIES2_MODS_DIR": "your-value",
"CITIES2_GAME_DIR": "your-value",
"CITIES2_LOCALE_COK": "your-value"
}
}
}
}Run this in your terminal
claude mcp add cities2 --env CITIES2_MODS_DIR=your-value --env CITIES2_GAME_DIR=your-value --env CITIES2_LOCALE_COK=your-value -- uvx cities2-mcpFill in the empty values before running it.
Or copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"cities2": {
"command": "uvx",
"args": [
"cities2-mcp"
],
"env": {
"CITIES2_MODS_DIR": "your-value",
"CITIES2_GAME_DIR": "your-value",
"CITIES2_LOCALE_COK": "your-value"
}
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"cities2": {
"type": "stdio",
"command": "uvx",
"args": [
"cities2-mcp"
],
"env": {
"CITIES2_MODS_DIR": "your-value",
"CITIES2_GAME_DIR": "your-value",
"CITIES2_LOCALE_COK": "your-value"
}
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
Values you fill in
CITIES2_MODS_DIRenvOptional path to the Cities: Skylines II Mods directory.CITIES2_GAME_DIRenvOptional path to the Cities: Skylines II install directory when auto-detection cannot find the game.CITIES2_LOCALE_COKenvOptional path to Locale.cok when the in-game encyclopedia file should be selected directly.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account mayor-modder, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Otheri
- More stars than 0% of the other 32673 servers in this category
- Published to the registry more recently than 84% of the other 32673 servers in this category
- Basic checks equal to or better than 100% of the other 32673 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Cities2 MCP and Modding Toolkit safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.5.0) reached the registry 6 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Systemdox
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated 2 days ago
Install
Systemdox
by puglieseweb
Your architecture in your agents' context: checks, specs, ADRs and docs over MCP, at write time.
Runs on your computerUpdated today
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Cities2 MCP and Modding Toolkit
Cities2 MCP and Modding Toolkit is a local MCP server and agent skill bundle for Cities: Skylines II gameplay questions, patch notes, and mod project workflows.
It gives AI agents access to a bundled, searchable Cities: Skylines II Wiki corpus, separately attributed curated research reports, and, when the game is installed locally, the in-game encyclopedia. Agents can use those sources to answer gameplay questions, summarize patch/update information, and explain city systems with source notes. The package also includes five agent skills for game knowledge, modding, review, debugging, and release readiness, plus local MCP workflow tools for scaffolding, inspecting, building, and packaging CS2 mod projects inside trusted workspaces.
The plugin is in active development. Package checks, direct MCP smoke tests, and selected client workflows are covered in the repository test suite and eval reports, but client plugin behavior can vary by host and version. See the known issues and eval reports for the latest verification notes.
Quick install
Choose your client: Claude Code | Claude desktop | Codex CLI | Codex app | Google Antigravity
See INSTALL.md for full installation details, direct MCP config, workspace setup, build prerequisites, and troubleshooting.
What it can do
Search game and modding information
The MCP server includes a prepared text corpus from the Cities: Skylines II Wiki. An AI assistant can:
- search the wiki
- retrieve full pages, page-level references, and code-oriented snippets for game systems, patch notes, and modding topics
- answer questions about game mechanics, recent updates, and how city systems affect your save
Search curated research
The MCP server also bundles curated Cities: Skylines II research reports. These reports are historically situated, separately attributed, and generated from committed research notes rather than raw transcripts. Results retain publication and source context so an assistant can distinguish time-bounded findings from current game behavior and APIs.
Search the local game encyclopedia
When Cities: Skylines II is installed locally, the MCP server reads the game encyclopedia from the installed game files. This source is enabled by default when the server can find Cities2_Data/Content/Game/Locale.cok.
The extracted encyclopedia index is cached locally on the user's machine and rebuilt only when the source game file, detected Steam build id, locale, or extractor version changes. Extracted game text is not committed to this repository, shipped in releases, or part of the redistributed wiki corpus.
Help with mod project workflows
The server also includes local workflow tools for CS2 mod projects. An AI assistant can:
- scaffold C# code, UI, or hybrid mod project templates
- write files inside configured workspaces
- list project trees
- run project builds and analyzers
- package project output
These tools are meant for local development workflows. Claude, Codex, and Antigravity can use them to write and run trusted workspace code during builds, so configure workspaces deliberately and use manual playtesting before treating any mod as ready to share.
Agent skills
cities2-knowledge: answers gameplay, city-system, and player-facing patch/update questions.cities2-modding: handles general modding questions and local mod project workflows.cities2-mod-review: reviews CS2 mods for safety, maintainability, user value, packaging hygiene, and verification gaps.cities2-mod-debugging: helps debug CS2 mod build, packaging, runtime, log, UI debugger, and in-game behavior issues.cities2-mod-release: checks whether a mod is ready to share.
The modding quality skills use documented CS2 best practices and negative constraints as defaults, and they do not present a mod as ready to share until it has been locally playtested.
Privacy
The MCP server runs locally and does not collect telemetry. See PRIVACY.md for details.
Licensing
The MCP server code is licensed under the MIT License. The included wiki corpus is licensed under Creative Commons Attribution-ShareAlike 3.0; its source attribution and transformation notes are in the wiki corpus attribution. The curated research corpus is separately attributed, and its original report prose follows the repository license; see the research corpus attribution.
This project is not developed by, endorsed by, reviewed by, or approved by Paradox Interactive, Iceflake Studios, Colossal Order, Paradox Wikis, or any related company. Cities: Skylines II and related names are used referentially.