tldraw
Looks at tldraw as an infinite-canvas toolkit for developers: how starter kits wrap agent chat and multiplayer into a board, which accessibility level version 4.0 reaches, and what the licence terms and breaking changes mean.
tldraw is an infinite-canvas toolkit built for developers, and SDK 4.0 adds a set of starter kits. Among them is an agent example that brings AI interaction onto the board, alongside branching chat, multiplayer sessions and workflows, all shipped under the MIT licence. The release also meets WCAG 2.2 AA, adding a high-contrast mode and aria labels, while development stays free and production needs a licence key.
