Summary
This server bridges the gap between AI-generated code changes and human-readable review. It exposes a show_diff_explanation tool that lets Claude review its own diffs and write inline annotations explaining what changed and why. The companion VS Code extension watches a local file store and renders the annotated diff in a webview panel with side-by-side or unified views powered by diff2html. Action buttons let you fire prompts back to Cursor chat for refactors or test suggestions. Reach for this when you're tired of scrolling through chat transcripts trying to reconstruct what the AI actually modified across multiple files.
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AI peer review for your code changes.
Just like humans review each other's PRs, your AI reviews its own changes with inline annotations that appear directly in a VS Code/Cursor panel.
Why AI Peer Review?
When humans write code, we do peer review. When AI writes code, we often scroll through chat hoping we understood what changed.
VibeLens gives AI the same workflow humans use: review the diff, annotate the changes, and explain the reasoning next to the code.
How It Works
AI makes changes -> AI reviews its own diff -> VibeLens opens an annotated panel
The AI calls the show_diff_explanation MCP tool after completing a task. The MCP server stores the review locally, and the VS Code/Cursor extension renders the diff with inline annotations.
Action buttons let you send improvement suggestions directly to Cursor chat.
Features
- Visual diff: Side-by-side or unified view powered by diff2html.
- Inline annotations: Review comments appear directly after relevant code lines.
- Action buttons: Click to send prompts to Cursor chat, such as refactors or test suggestions.
- Click to open: File names link directly to the source.
- Workspace-aware: Only shows in the window matching your project.
- Auto-configured MCP: The extension configures
vibelens-mcpfor supported AI tools.
Installation
VS Code
Install kevcode.vibelens-extension from the Visual Studio Marketplace once published.
Cursor
Install kevcode.vibelens-extension from Cursor's extension marketplace once the Open VSX listing syncs.
VSIX
Download the .vsix from GitHub Releases and install it from the Extensions view with "Install from VSIX...".
The extension automatically configures the MCP server on first activation where supported.
Manual MCP Configuration
If auto-configuration does not work, add vibelens-mcp manually to your MCP client.
Cursor
Add to ~/.cursor/mcp.json:
{
"mcpServers": {
"vibelens": {
"command": "npx",
"args": ["-y", "vibelens-mcp"]
}
}
}
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"vibelens": {
"command": "npx",
"args": ["-y", "vibelens-mcp"]
}
}
}
Windsurf
Add to ~/.codeium/windsurf/mcp_config.json:
{
"mcpServers": {
"vibelens": {
"command": "npx",
"args": ["-y", "vibelens-mcp"]
}
}
}
Packages
| Package | Description |
|---|---|
| packages/extension | VS Code/Cursor extension that displays diff explanations |
| packages/mcp | MCP server with the show_diff_explanation tool |
Architecture
MCP Server VS Code/Cursor Extension
| |
| writes review data | watches
| ~/.vibelens/ | ~/.vibelens/
| |
+----------------------------->|
|
v
Webview Panel
(diff + annotations)
Development
# Install dependencies
pnpm install
# Build all packages
pnpm run build
# Build extension only
pnpm run build:extension
# Build MCP only
pnpm run build:mcp
# Package extension as .vsix
pnpm --filter vibelens-extension package
Publishing
- Extension: Published as
kevcode.vibelens-extensionto VS Code Marketplace and Open VSX. - MCP package: Published to npm as
vibelens-mcp. - MCP Registry: Registered as
io.github.klewicki7/vibelens-mcp.
License
MIT
Featured
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Give your AI agent a complete email layer—sending, inbound inboxes, and sandbox testing.
Get 4K emails/month free →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Configuration
YOUR_API_KEY*secretYour API key for the service