re_gent Blame for VS Code

May 6, 2026 · View on GitHub

Git-style blame for AI agent activity. See which prompt wrote each line of code.

re_gent is a version control system for AI agents—it tracks every change an agent makes, which tool call produced it, and the conversation context behind it. This VS Code extension brings that provenance directly into your editor.

Features

Inline Blame Annotations

See which step (tool call) last modified each line, right in your editor:

a1b2c3d4 • Edit • 5m ago    │  function hello() {

Rich Hover Tooltips

Hover over any line to see:

Full step hash
Timestamp
Tool name (Edit, Write, Bash, etc.)
Tool arguments excerpt
Link to full conversation context

Session Timeline

Browse your agent's step-by-step history in the sidebar:

See all steps in chronological order
Click any step to see the diff
Filter by session

Conversation Context

One-click access to the full transcript that led to any change.

Installation

Prerequisites

Install the re_gent CLI: Follow instructions at github.com/regent-vcs/regent

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

# Or build from source
git clone https://github.com/regent-vcs/regent
cd regent
go build -o rgt ./cmd/rgt

Initialize a re_gent repository in your project:

cd your-project
rgt init

# Configure Claude Code hook (automatic tracking)
# This modifies .claude/settings.json

Make some changes with Claude Code so there's data to display:
- The hook will automatically capture each tool call as a Step
- After a few edits, run rgt log to verify steps are being captured

Install Extension

From Source (Development)

Clone this repository:

git clone https://github.com/regent-vcs/vscode-regent
cd vscode-regent
npm install
npm run compile

Open in VS Code and press F5 to launch Extension Development Host
Open a workspace with a .regent/ directory

From VSIX (Coming Soon)

Download the latest .vsix from Releases
In VS Code: Extensions > ... > Install from VSIX...
Open a workspace with .regent/ directory

From Marketplace (Coming Soon)

Search for "re_gent Blame" in VS Code Extensions
Click Install
Open a workspace with .regent/ directory

Usage

Viewing Blame

Open any tracked file—blame annotations appear automatically in the editor (if enabled).

Keyboard shortcuts:

Hover over a line: See step details
Cmd+Shift+P → "re_gent: Show Step" → Enter step hash

Commands

re_gent: Show Step Details - View full metadata for a step
re_gent: Show Conversation Context - See the transcript leading to a change
re_gent: Refresh Blame - Manually refresh blame annotations

Configuration

Open VS Code Settings (Cmd+,) and search for "re_gent":

regent.enableInlineBlame - Enable/disable inline annotations (default: true)
regent.blamePosition - Show blame in gutter or inline (default: inline)
regent.sessionId - Session to show blame for (empty = most recent)

How It Works

re_gent captures every tool call (Edit, Write, Bash) that an AI agent makes. Each becomes a Step—like a git commit, but automatic and enriched with:

The exact tool arguments
The conversation context
Per-line provenance (blame)

This extension reads .regent/index.db and .regent/objects/ directly to show you that provenance inline.

Architecture

Read-only: Never modifies your .regent/ data
Fast: Direct SQLite queries + content-addressed object reads
Safe: No subprocess calls, no git conflicts

Development Status

Current version: 0.1.0 (initial release)

Contributing

See CONTRIBUTING.md for development setup and guidelines.

License

MIT License - see LICENSE