# Buildermark: Measure how much of your code is written by agents

> Source: <https://buildermark.dev/>
> Published: 2026-06-13 19:55:44+00:00

# How much of your code is written by agents?

Buildermark matches your coding agent logs with git commits to attribute every line — **local** and **open source**.

No workflow changes. No agent hooks.

## A measurement layer for coding agents.

### Agent attribution

Track the exact percentage of each commit that was written by an AI coding agent — no reliance on agent hooks, no manual tagging.

### Conversation ratings

Rate agent conversations manually, or let the agent log its own critique with the `/rate-buildermark`

skill.

### Agent benchmarking

Compare how Claude, Codex, Gemini, and Cursor perform on your actual codebase.

### Every agent you use.

- Claude Code CLI
- Claude Code Cloud
- Codex CLI
- Codex Cloud
- Gemini CLI
- Cursor

Missing one? [File a request →](https://github.com/gelatinousdevelopment/buildermark/issues/new)

### Your data never leaves

your machine.

- ✓Zero analytics, zero telemetry
- ✓Runs entirely on
`localhost:55022`

- ✓MIT licensed, audit-friendly
- ✓Only outbound request: checking for updates

## Fully Automatic

- 01
### Auto-import conversations

Chat history from Claude Code, Codex, Gemini, and friends is imported automatically. Add shared folder paths to pull from VMs and containers.

- 02
### Auto-import commits

Your git history loads automatically. Nothing leaves your machine.

- 03
### Auto-match diffs

A formatting-agnostic matcher aligns conversation diffs to commit diffs — robust against auto-formatters, reorderings, and line-ending noise.

### Attribution in your notification center, the moment you commit.

See agent percentage for each commit immediately — no dashboard required. Works across macOS, Windows, and Linux.

`macOS 15+`

`Windows 10+`

`Linux CLI`

`Chrome`

`Firefox`

`Safari`

For importing from cloud-based agents

A local app container runs a Go server on `localhost`

that serves the web UI. No cloud.
No accounts. No sync.

## Team Server.

Aggregate. Compare. Compete.

A self-hosted server that rolls Buildermark metrics up across your whole org. See who's shipping with agents, which projects adopt fastest, and how your dev process is changing — all on your own infrastructure.

[Join the waitlist →](./team)