Codebuff — Turn Your Terminal into a Supercharged AI Developer

What is Codebuff?

Codebuff is a cutting-edge, AI-powered command-line assistant that helps developers write, edit, and refactor code directly from the terminal. Created by a Y Combinator-backed startup, it combines multiple advanced models—such as Claude Sonnet, Gemini Flash, and GPT-4o-mini—to deeply understand your entire codebase and intelligently automate programming tasks beyond the capabilities of traditional tools.

Main Features of Codebuff

• Natural Language Coding: Describe what you want in plain English—Codebuff finds the relevant files, writes or refactors code, and shows you the diffs before applying changes.

• Seamless Terminal Integration: It doesn’t just edit code—it can also install dependencies, run tests, and execute shell commands directly from your CLI.

• Multi-File Refactoring: Perform large-scale refactors, like renaming components or updating APIs across multiple files in one go.

• Smart File Selection: A custom model quickly identifies which files are most relevant to your request, ensuring high accuracy and minimal noise.

• Knowledge Files Support: Add a knowledge.md file to your repo to teach Codebuff about project-specific rules, styles, and best practices.

• Flexible Pricing: Start with 500 free credits/month, and pay per task after that—based on complexity, with rates starting at $0.01 per credit.

Technical Principles Behind Codebuff

• Multi-Model Pipeline: Combines various models—Gemini Flash (for file retrieval), Claude Sonnet (for understanding and editing), and GPT-4o-mini (for generating diffs and patches).

• Codebase Indexing & Caching: It creates a cache of all relevant files to ensure fast and context-aware responses.

• Diff-Based Workflow: All code edits are shown as diffs before application, allowing for safe review and clean version control integration.

• Customizable Intelligence: Learns from your repo’s knowledge.md to ensure it aligns with your code conventions and patterns.

Project Address

• Official Website: https://www.codebuff.com

Application Scenarios

• Rapid Feature Development: Quickly scaffold APIs, components, or business logic with minimal setup.

• Massive Code Refactoring: Rename classes, restructure code, and update logic across dozens of files intelligently.

• End-to-End CLI Automation: From writing code to installing packages and testing—all in one place.

• Developer Onboarding & Code Maintenance: Keep large or legacy codebases clean, consistent, and easy to update.

• Polyglot Support: Works well across front-end, back-end, DevOps (Terraform), SQL, and scripting languages.