How to Index Your Local Codebase for Zero-Cost Pair Programming

You don't need expensive token billing or external embeddings to give Claude or ChatGPT full context of your codebase.

Generate a Dense Repository Map Run this terminal one-liner in your project root to pack your core architecture into a single token-efficient markdown file:

npx repomix --style xml --output ./repomix-output.xml --ignore "node_modules/**,.git/**,dist/**"

The Workflow Drag `repomix-output.xml` directly into Claude 3.5 Sonnet or ChatGPT. The model reads the whole file structure and type definitions instantly without requiring vector databases.