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
Coating Lab
Overview
Description from the maker (original English)
Real surface finishes for game gun models: sourced finishes, variants, wear baked from use
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:
COATINGLAB_OUT,COATINGLAB_BLENDER,COATINGLAB_LIBRARY,COATINGLAB_WAIT_FOR
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": {
"coatinglab": {
"command": "uvx",
"args": [
"coatinglab-mcp"
],
"env": {
"COATINGLAB_OUT": "your-value",
"COATINGLAB_BLENDER": "your-value",
"COATINGLAB_LIBRARY": "your-value",
"COATINGLAB_WAIT_FOR": "your-value"
}
}
}
}Run this in your terminal
claude mcp add coatinglab --env COATINGLAB_OUT=your-value --env COATINGLAB_BLENDER=your-value --env COATINGLAB_LIBRARY=your-value --env COATINGLAB_WAIT_FOR=your-value -- uvx coatinglab-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": {
"coatinglab": {
"command": "uvx",
"args": [
"coatinglab-mcp"
],
"env": {
"COATINGLAB_OUT": "your-value",
"COATINGLAB_BLENDER": "your-value",
"COATINGLAB_LIBRARY": "your-value",
"COATINGLAB_WAIT_FOR": "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": {
"coatinglab": {
"type": "stdio",
"command": "uvx",
"args": [
"coatinglab-mcp"
],
"env": {
"COATINGLAB_OUT": "your-value",
"COATINGLAB_BLENDER": "your-value",
"COATINGLAB_LIBRARY": "your-value",
"COATINGLAB_WAIT_FOR": "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
COATINGLAB_OUTenvThe only folder Coating Lab writes to; defaults to ~/.coatinglabCOATINGLAB_BLENDERenvBlender's executable, if it is not on the PATH or in the usual install folderCOATINGLAB_LIBRARYenvA finishes JSON of your own, merged over the built-in libraryCOATINGLAB_WAIT_FORenvProcess names that hold the machine (e.g. UnrealEditor.exe); a bake refuses to start while one runs
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 hpdkhoa, 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 32678 servers in this category
- Published to the registry more recently than 62% of the other 32678 servers in this category
- Basic checks equal to or better than 100% of the other 32678 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 Coating Lab 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 (0.1.0) reached the registry 23 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, Starreel
Alternatives
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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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Runs in the cloud★ 211Updated 2 days ago
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Runs on your computerUpdated today
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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.
Coating Lab
Real surface finishes for game gun models, worn where use wears a gun.
An MCP server that gives game gun models real surface finishes, worn where use wears a gun.
- A finish library with sources. Anodized aluminium, manganese and zinc phosphate, blued and nitrided steel, ceramic coatings (FDE, OD green, tungsten, graphite, coyote), stainless, polymer, rubber, brass, copper, lead, walnut. Each is a physically based value (linear colour, metallic, roughness) with what shows when it wears through and the sources of its numbers. Values reasoned from descriptions are marked as estimates.
- Coating variants. A spec puts a finish on each material slot of a model, in as many variants as you want (an issued rifle, a two-tone FDE build, an abused one), each at a wear level: new, issued, worn or abused.
- Wear from evidence, baked once. In Blender, into the model's vertex colours: exposed edges, where the hands work the gun (its grip, the support hand, the controls), where parts slide (a magazine in its well, a stock on its tube), and dirt where the surface is occluded and round the muzzle and the port. Every variant reads the same masks, so a new variant costs nothing.
- Checks. Every finish against the rules physically based rendering rests on. Every variant's worn share against its level, and no wear inside corners.
- One formula everywhere. The checks, the look-dev renders and an engine's material compute wear the same way (
coat.py), so what passes is what the player sees.
Model Lab (modellab-mcp) builds give their own slots (upper, lower, barrel and more), marks and parts: spec_for_modellab makes a coating spec from a build in one call.
Install
Python 3.10 or later and Blender 4.2 or later.
pip install coatinglab-mcp
{"mcpServers": {"coatinglab": {"command": "coatinglab-mcp"}}}| Setting | Meaning |
|---|---|
COATINGLAB_OUT | The only folder Coating Lab writes to. ~/.coatinglab by default. |
COATINGLAB_BLENDER | Blender, when it is not on the PATH or in the usual install folder. |
COATINGLAB_LIBRARY | A finishes JSON of your own, merged over the built-in library. |
COATINGLAB_WAIT_FOR | Process names that hold the machine. A bake waits for none of them to run. |
Tools
| Tool | What it does |
|---|---|
list_finishes, read_finish | The library, and one finish with its notes and sources. |
check_library, check_finish | The library, or a finish of your own, against the physical rules. |
list_wear_levels, list_templates | The wear levels, and the ready variant sets. |
spec_for_modellab | A coating spec for a Model Lab build. |
validate_spec | A spec's problems: a slot without a finish, a finish on the wrong material. |
bake | Bakes the wear masks into a copy of the model. |
check_coating | Each variant's wear against its level, and wear kept out of corners. |
render_variants | Look-dev renders and a sheet. |
engine_params | A variant's values by slot for an engine material. |
The masks and the formula
The bake writes the vertex colour Col:
| Channel | Meaning |
|---|---|
| R | Edge: 1 on flat ground, 0 on a sharp exposed edge |
| G | Handling: 1 where the hands work the gun |
| B | Rub: 1 along the lines parts slide on |
| A | Dirt: 1 where the surface is occluded, and round the muzzle and the port |
An engine's material follows the formula in src/coatinglab/coat.py. A wear level is a threshold: the higher the level, the weaker the mask that already wears through. A grunge texture breaks wear up but never makes wear.
What is estimated
- Every roughness value. No source maps a finish's surface to a rendering roughness.
- The colours of the anodized, phosphate, blued, nitrided and most ceramic finishes. The standards set processes, not colours. OD green and coyote come from FED-STD-595 colour numbers.
- The wear amounts. Sources say where guns wear, not how fast. Each level is set so Model Lab's M4A1 lands in the middle of its band.
- A hand's zone is a sphere: on a round handguard the support hand's wear reaches its top as well as its underside.
License
MIT