DejaThink

AI-augmented team collaboration platform where individuals and groups chat, set missions, and receive real-time AI input throughout. Built full-stack with persistent AI context, real-time group threads and a structured mission system for goal completion, all in a single product.

Teams needed a collaboration tool that went beyond passive note-taking or bolted-on AI features. The AI needed to be present inside conversations, listening, contributing and helping drive outcomes, without disrupting the natural flow of team discussion.

Designed three distinct AI interaction modes: solo AI chat with persistent memory, team chat with the AI as a live participant, and mission mode where the AI acts as a goal-completion partner. Built a LangGraph agent runtime with conversation context threading, real-time group threads, user-approved memories and a mission engine that tracks individual and team progress.

DejaThink was built to solve a specific product gap: most AI tools exist outside the conversation, requiring users to copy-paste context or context-switch between tabs. The goal here was to embed AI directly into the team environment: present inside group threads, listening to the full conversation, and contributing when useful.

The platform was architected around three interaction modes. Solo chat gives users a private AI conversation with persistent memory across sessions. Team chat enables multiple users to collaborate in a shared thread while the AI monitors the full conversation and contributes contextual input in real time. Mission mode allows individuals or teams to define a goal, and the AI becomes a strategic partner, surfacing action items, flagging blockers, and tracking progress toward completion.

The backend was engineered to handle concurrent multi-user sessions with full AI context threading, keeping the model informed of the conversation history. Users approve each memory before it is saved. Authentication, session management, per-user encryption and workspace-scoped data access were implemented to support secure team environments.

DejaThink shipped with all three modes working and an onboarding flow, on an architecture built for feature expansion. AI is the core function of the product, not an add-on.

• Full-stack AI SaaS platform
• LLM chat integration
• Real-time team messaging
• Mission & goal tracking system
• Authentication & session management