About HAI-Co²

HAI-Co² (Human-AI Co-Construction) is a small, faithful reference implementation of the framework introduced by Dutta et al. (2025): an interaction paradigm in which a user and a language-model agent share a single, structured workspace.

What the paper proposes

Traditional chat collapses every artifact onto a single message stream. HAI-Co² separates the conversation from the construction space — preferences, todos and a co-edited document — so both parties can act on it explicitly. The agent reads and writes that space via tools; the human edits it directly.

What this repository contains

• FastAPI backend with JWT + Google OAuth
• LangGraph React agent + Postgres checkpoints
• Pluggable LLM provider factory (OpenAI / Mistral / Google / Anthropic)
• Workspace-bound tools (document / todos / preferences)
• Next.js 14 frontend with the four-panel co-construction UI
• One-command local Docker deployment

Reference

Dutta, S. et al. (2025). Human-AI Co-Construction. Position paper.