BotKit by Fedify 
Introducing #BotKit: A #TypeScript framework for creating truly standalone #ActivityPub bots!
Unlike traditional Mastodon bots, BotKit lets you build fully independent #fediverse bots that aren't constrained by platform limits. Create your entire bot in a single TypeScript file using our simple, expressive API.
Currently #Deno-only, with Node.js & Bun support planned. Built on the robust @fedify foundation.