Hello HN! We are Nemo and Baran. We are interaction designers based in Zurich and have been exploring what future agentic interfaces should look like. Since the release of ChatGPT, chatting with agents has become the norm. But LLMs are not just talking partners anymore. We work together to implement and develop ideas. With the Piary project, we aim to develop the ideal interface for human-agent collaboration. It combines the reactive cells of Observable, the plain-text document model and typographic focus of iA Writer, and the coding-agent harness of Pi. We look forward to hearing your thoughts, ideas, feedback and criticism.