Diffo

Description

Diffo is a tool designed for reviewing agent-written code directly on your machine. It facilitates a live review process that is wired to the agent responsible for the code, allowing your comments to be returned as fixes. This process occurs entirely on your local machine, with no need for configuration, accounts, or cloud services. Diffo operates a small local server per repository, storing state in SQLite under ~/.diffo.

The tool supports various changesets, including uncommitted agent output, branches, or commit ranges, and opens reviews in your browser without requiring the code to be pushed remotely. It integrates with multiple coding agents such as Claude Code, Cursor, VS Code, Copilot, Codex, Gemini CLI, Amp, Goose, and OpenCode, provided they are installed on your system.

Diffo is not an AI code reviewer; instead, it serves as a reading tool that leverages human judgment. It allows syntax-highlighted unified or split diffs, keyboard-first navigation, and per-file viewed tracking. The changeset remains live, updating as the agent works, and comments can be made on lines, files, or entire changesets.

The tool ensures that no code leaves your machine, making zero network calls and holding no keys as it does not call any models. Diffo is designed to work with Node 24, utilizing the runtime's built-in node:sqlite for state management. It is a versatile tool that can be run on multiple repositories simultaneously, with each having its own server and port.

Diffo's Core Features

• Local code review tool

• Live review on your machine

• No remote access needed

• Integrates with multiple agents

• Syntax-highlighted diffs

• Keyboard-first navigation

• Per-file viewed tracking

• No network calls or telemetry

• Stores state in SQLite

• Supports multiple repositories

How to use Diffo?

1. 1

   Install: Set up Diffo with your coding agents

2. 2

   Open Review: Start a live review session

3. 3

   Comment: Provide feedback on the code

4. 4

   Update: Receive fixes directly in the diff

Diffo's Use Cases

• Local Code Review
• Agent Integration
• Live Code Updates
• Multi-Repo Support
• Secure Code Handling

FAQ from Diffo

• Does Diffo send my code to the cloud?

  No, Diffo makes zero network calls and keeps all data local.

• Is Diffo an AI code reviewer?

  No, Diffo is a reading tool that relies on human judgment.

• Can I use Diffo with pull requests?

  Not yet, but it's planned. Currently, it works with changesets.

• Why is Node 24 required for Diffo?

  Node 24 is needed for its built-in node:sqlite, simplifying setup.

• Does Diffo work with agents other than Claude Code?

  Yes, it integrates with multiple agents like Cursor, VS Code, and Copilot.

• Can I run Diffo on multiple repositories?

  Yes, each repository runs on its own server and port.

• What happens if I close my terminal during a review?

  The review continues as Diffo runs a background server.

• How do I remove Diffo from my system?

  Remove all state with rm -rf ~/.diffo and unlink any clones.