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
Compositor
Overview
Description from the maker (original English)
Read and edit Compositor .comp projects: layers, folders, masks, transforms, previews and exports
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).
- The registry lists no key to fill in.
You need
- npmNode.js installed (for the npx 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": {
"compositor": {
"command": "npx",
"args": [
"-y",
"compositor-mcp"
]
}
}
}Run this in your terminal
claude mcp add compositor -- npx -y compositor-mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"compositor": {
"command": "npx",
"args": [
"-y",
"compositor-mcp"
]
}
}
}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": {
"compositor": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"compositor-mcp"
]
}
}
}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.
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 6, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Josusanz, 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 32484 servers in this category
- Published to the registry more recently than 49% of the other 32484 servers in this category
- Basic checks equal to or better than 100% of the other 32484 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 Compositor 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 (0.1.4) reached the registry 42 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Recta
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 yesterday
Install
Recta
by RectaBuild
Cheaper cross-chain stablecoin routes for AI agents; 5 % of the verified saving, nothing if none.
Computer or cloudUpdated 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.
compositor-mcp
An MCP server that lets Claude and other AI agents read and edit Compositor projects, the open-source Photoshop alternative for Mac.
It works on the documented .comp package format (a manifest.json plus one PNG per layer), so it needs no changes to Compositor itself. Edit a project with an agent, then open it in Compositor. Or the other way round: save in Compositor and let the agent inspect, retouch or render it.
What the agent can do
| Tool | Purpose |
|---|---|
inspect_project | Canvas size, resolution and every layer with folder depth, opacity, blend mode, transform, mask and clipping info |
list_layers | Compact top-to-bottom view like the Layers panel |
render_preview | Flattened PNG preview returned as an image so the model can *see* the composition |
export_flattened | Full-resolution PNG or JPEG export |
export_layer | Copy a layer's source pixels or mask to a file |
create_project | New document, optionally with a solid background layer |
add_image_layer | Import PNG, JPEG, HEIC, TIFF, WebP… as a layer, with fit/fill/stretch placement, opacity, blend mode and folder |
add_folder | Create a layer folder |
set_layer | Rename, show/hide, opacity, blend mode, position, size, rotation, flips, sampling, mask on/off |
move_layer | Reorder layers or move them between folders |
remove_layer | Delete a layer or a whole folder |
replace_layer_image | Swap a layer's pixels (round-trip through another tool or a generated image) |
set_layer_mask | Attach a grayscale mask, invert it, or clear it |
resize_canvas | Change the document size with an anchor, without resampling |
open_in_compositor | Open the project in the Compositor app |
The server also exposes a compositor://format resource describing the file format.
Related
marcushorndt/compositor-mcp takes a different route: it drives Compositor's own document model and renderer headlessly (Swift), so previews match the app exactly. This package is a plain Node server that works on the documented file format, needs no build of the app, and runs wherever Node runs. Pick whichever fits your setup; both open the same .comp files.
Install
Requires Node.js 20 or later. Compositor itself is only needed to look at the result.
Claude Code
claude mcp add compositor -- npx -y compositor-mcpClaude Desktop
Add to claude_desktop_config.json:
{"mcpServers": { "compositor": { "command": "npx", "args": ["-y", "compositor-mcp"] } } }
From source
git clone https://github.com/Josusanz/compositor-mcpcd compositor-mcp npm install npm run build claude mcp add compositor -- node /path/to/compositor-mcp/dist/src/index.js
Example session
Create a 1920×1080 project at
~/Desktop/poster.compwith a white background, addphoto.jpg
scaled to fill, put
logo.pngin the bottom right corner at 80 % opacity with Multiply, then show
me a preview and open it in Compositor.
The agent calls create_project, add_image_layer twice, set_layer, render_preview and open_in_compositor. Compositor opens the document with the layers ready to keep editing.
How it maps to the Compositor format
- Layer pixels are stored untouched as 8-bit sRGB PNGs; placement, scale, rotation and flips live in the layer transform, so edits stay non-destructive.
- Masks are written as 8-bit grayscale PNGs without alpha, as Compositor requires.
- Manifests are validated against the same rules as
ProjectStore.swiftbefore writing, written with sorted keys and replaced atomically. - Fields this tool does not understand (adjustments, effects, text, shapes, guides, anything newer) are preserved on round trip.
- Projects are saved as format version 9 (what Compositor 1.2.6 writes); a project declaring a newer version keeps its own number and its unknown fields on round trip. Older Compositor builds reject newer versions; update the app if a file will not open.
Limitations
- The preview renderer covers order, folders, visibility, opacity, transforms, raster masks and the blend modes sharp supports. Clipping masks, adjustment layers and layer effects are not rendered yet; the tool reports what it skipped. Compositor's own export is the reference.
- Compositor does not watch files for changes. After the agent edits a project that is already open, close and reopen the document (or call
open_in_compositor). - There is no live connection to the running app: selection, undo history and the viewport are session-only in Compositor and out of reach here.
Development
npm installnpm test # builds and runs the node:test suite npm run dev # runs the server from TypeScript with tsx
License
MIT. Compositor is © Robbie Tilton, also MIT.