Matra MCP server

Matra

A headless rich text editor framework with a first-class extension API.

• No engine leakage — the document model is plain JSON; no ProseMirror type appears in a public signature
• Plain objects, plain functions — no this, no classes, no inheritance chains
• Inferred types — adding an extension adds its commands, fully typed, with no module augmentation
• Async-safe — position mapping is built in, so a late AI response cannot corrupt the document

See DESIGN.md for the API rationale, CHANGELOG.md for what changed when, and CONTRIBUTING.md before a pull request.

Packages

Matra is মাত্রা — the horizontal line that runs across the top of Bengali script and holds a word together. Packages live under the @matrajs scope, matching matrajs.com.

Installing a binding installs the engine with it. For a React application pnpm add @matrajs/react is the entire install: one package, and no third-party dependency arrives behind it.

Quick start

import { createEditor, starterKit } from '@matrajs/core'

const editor = createEditor({
  extensions: starterKit,
  content: '<p>Hello</p>',
})

editor.mount(document.querySelector('#editor')!)
editor.commands.toggleBold()

Every command comes from the array you passed. Nothing else is on editor.commands, and calling something that is not there is a compile error.

The packages in detail

Eight packages, one version number, released together. Every other package depends on @matrajs/core and on nothing else, so installing a binding installs the whole editor — there is no second package to remember, no @matrajs/pm to keep in step, and no peer range to resolve by hand.

@matrajs/core — MIT

The engine, and the only package that is not optional. The document model, transforms, position mapping, editor state and the editable view are written here, with zero runtime dependencies.

pnpm add @matrajs/core

Entry points

Shortened. The full README is on GitHub.