Notes on building Bear: BIM, AI agents, and the tools we open source.https://bear.build/https://bear.build/posts/hearth-build-your-own-assistant/https://bear.build/posts/hearth-build-your-own-assistant/Hearth, an AI home for your family, is the first app built on Playground: our library for building collaborative AI coding harnesses for teams that don't normally code.Thu, 13 Aug 2026 00:00:00 GMT