re_gent is an open-source version control system designed specifically for AI coding agents. It automatically captures every tool call an agent makes — file edits, shell commands, etc. — along with the conversation context that triggered them. Think of it as Git for your agent's actions.

Key Features

• Automatic tracking: No manual commits. Every tool call is captured as a Step (parent hash, workspace snapshot, conversation delta, tool name and args, session ID, timestamp).
• rgt log: See what the agent did — file changes, line counts, timestamps, and the causing prompt.
• rgt blame <file>:<line>: Identify which prompt wrote a specific line, which session, and which tool.
• rgt rewind (coming soon): Restore workspace to any previous step.
• Multi-session awareness: rgt sessions lists active sessions; rgt log --session <id> filters by session.
• rgt show <step-hash>: Full context for a step — diff, conversation, timestamp.

Installation

# Homebrew (macOS/Linux)
brew tap regent-vcs/tap
brew install regent

Or via Go
go install github.com/regent-vcs/regent/cmd/rgt@latest

Then initialize in your project directory with rgt init. Shell completions for bash, zsh, and fish are included.

How It Works

Agent activity is stored in .regent/ (like .git/):

• objects/ — content-addressed blobs (BLAKE3)
• refs/ — session pointers
• index.db — SQLite query index
• config.toml

Steps form a directed acyclic graph (DAG). Each session is its own branch; common ancestors are deduplicated. The tool currently supports Claude Code — contributions welcome for other agents.

For the full specification, see POC.md in the repository.