Plim

Plim is a Notion-inspired block editor for the web, built as a TypeScript monorepo. It ships a framework-agnostic core, a DOM view layer, a Markdown parser/serializer, and React bindings — all small, composable, and designed to be embedded in your own product. A live example is available, and the project is currently in pre-1.0 (0.0.x) — the public API is mostly stable but may shift before 1.0.

The repo is split into four packages: @plim/core provides the schema, document model, transactions, validation rules, action/extension/trigger system, history, and the built-in block & mark descriptors (runtime-agnostic, no DOM); @plim/markdown parses Markdown into a Plim document and serializes back; @plim/editor is the view layer that mounts a Plim document into a contenteditable, owning the floating toolbar, block-handle gutter, paste/clipboard handling, drag-and-drop, and the keyboard pipeline; and @plim/react provides React bindings including <PlimEditor>, useEditorHandle(), slash-command and mention extensions, and a bridge for defining blocks with toComponent so real React components can be persisted into the document.

Motivation

I'd been playing around with ProseMirror and Tiptap and kept getting frustrated by how un-opinionated they were. Every project ended up rebuilding the same scaffolding — toolbars, slash menus, block handles, paste handling — before I could get to the part I actually cared about. So I started toying with what an API for an opinionated editor could look like while still leaving room for extensibility. That experimentation became the first version of Plim (Mauritian Creole for pen).

Once I had an initial vision, I leaned heavily on GitHub Copilot and OpenCode (using GPT-5.5 and Opus 4.7) to research Notion, ProseMirror, and what a future block editor could look like — including filling in gaps in my initial design. After many hours of tweaking, testing, and polishing the API surface, I ended up with something noticeably more capable than what I'd originally set out to build: a small, embeddable editor that's opinionated where it should be, and gets out of the way where it shouldn't.