LLM Text Editor

A web app for grammar correction powered by a large language model. Users submit text, review highlighted corrections as an inline diff, and refine the result, with a token-based economy and collaborative editing built on top.

Key Features

• LLM grammar correction with Mistral, shown as an editable inline diff before accepting
• Three user tiers: free (short texts), paid (tokens, downloads, history, collaboration), and super users (moderation)
• Collaborative editing where paid users share documents and work toward an agreed-upon version
• Complaints system resolved by super users with token penalties
• Prompt injection prevention via input sanitization and system prompt masking

Developer

Built as a software engineering course project, later cleaned up and deployed. I built the Streamlit app with a custom bidirectional React component for the editable diff view, the PostgreSQL-backed account, token, and moderation systems, and the Mistral API integration.