# Lumen

Source: https://sonpiaz.com/projects/lumen
ID: https://sonpiaz.com/projects/lumen#entity

Shows developers what is using their Mac, and what is filling their disk.

Status: Live
Started: 2026-06
Updated: 2026-09-12
Tier: side

## The problem

Activity Monitor says a disk is full and says nothing about why. For developers the answer is usually build caches, simulator images and dependency folders spread across dozens of projects, none of which show up as one obvious culprit.

## The approach

A native menu bar app that shows live CPU, memory and disk, with a storage view that understands developer folders and can clean them safely.

## Where it is now

Signed, notarized and downloadable today.

## What happens if this works

A system monitor that knows what a developer's machine is actually full of.

## Evidence

- [About 14 MB native app, signed and notarized](https://github.com/sonpiaz/lumen)

## Links

- [repo](https://github.com/sonpiaz/lumen)