ThoughtMirror is an AI-powered journaling companion that helps users identify and reframe cognitive distortions in real-time. It acts as a gentle guide for self-reflection, empowering users to understand their thought patterns, break free from negative cycles, and foster personal growth without judgment.

Journaling is a powerful tool for self-reflection, but it's easy to get stuck in negative thought patterns without realizing it. These patterns, known as cognitive distortions, can subtly shape our reality, leading to anxiety and self-doubt.

ThoughtMirror addresses this by analyzing journal entries as you write. It detects cognitive distortions and provides gentle, therapist-inspired feedback to help you recognize and re-evaluate your thoughts. With an interactive calendar, you can track your emotional patterns over time, gaining clarity and building mental resilience. Our goal is to provide a tool that empowers you to be in control of your own growth and self-discovery.

We replicate a therapeutic approach in a digital format, using a two-stage AI pipeline to provide feedback. The application is built with a modern web stack, featuring a Next.js frontend and a FastAPI backend.

1. Distortion Identification (Fine-Tuning): We fine-tuned a Gemini-2.0-Flash-001 model on over 2,000 clinician-annotated text samples. This specialized model accurately identifies and classifies cognitive distortions within a user's journal entry.

2. Reflective Prompt Generation (RAG): After a distortion is identified, a RAG (Retrieval-Augmented Generation) pipeline using a non-fine-tuned Gemini 2.0 model takes over. It retrieves authentic therapist responses from a curated knowledge base and generates gentle, reflective prompts. This encourages users to think critically about their thought patterns, much like a therapist would.

The backend, built with FastAPI, handles the AI processing, user authentication, and data persistence with Firebase. The frontend is a responsive Next.js application built with

• Real-Time Analysis: Get instant feedback on your journal entries as you type.
• Cognitive Distortion Detection: Identifies common distortions like catastrophizing, black-and-white thinking, and more.
• Therapist-Inspired Feedback: Receive gentle, non-judgmental prompts to encourage self-reflection.
• Interactive Calendar: Visualize and track your emotional patterns and growth over time.
• Secure Journaling: User data is securely managed using Firebase authentication and storage.

• 🏆 ThoughtMirror won 1st place at GenAI Genesis 2025 Canada's Largest AI Hackathon (600+ participants)