@b32nio/spindle-slides-core

The framework-agnostic presentation engine behind Spindle Slides. Zero React.

It owns the deck model, a container-agnostic scene layer (elements — text, shapes, images, lines/connectors, and tables — rotated-rect geometry, anchor-invariant resize/rotate, snapping, align/distribute, z-order, flat groups, fractional indexing), rich text (a flat ProseMirror schema + pure JSON helpers), themes & layouts, comments, and an optional Yjs collaboration binding. Tables carry per-cell rich text, cell/row/column selection state, and content-driven row heights.

import { DeckImpl } from '@b32nio/spindle-slides-core';

const deck = new DeckImpl('my-deck', 'Untitled deck');
const slide = deck.getActiveSlideId();
deck.addElement(slide, { type: 'shape', shape: 'star5', x: 100, y: 100 });

const json = deck.getData();   // plain JSON — author by hand or generate

• Immutable records + semantic events — every mutation replaces the object and emits a typed event, so a React layer can subscribe at element granularity.
• Collab is opt-in and lazy — deck.attachCollab(provider, identity) loads the Yjs binding as a separate chunk (@b32nio/spindle-slides-core/collab); consumers who don't collaborate never load Yjs.
• Pure-JSON model — getData() / setData() round-trip a DeckData object.

Pair with @b32nio/spindle-slides-react for the editor UI. Full docs: https://spindle.b32n.io/docs/slides/overview.

MIT licensed.