Process Overview Monitor

A menu bar monitor for Macs running AI builds. It shows which project, test run or Claude session is eating your memory and CPU, and lets you stop the right thing without guessing.

This Mac32 GB · 10 cores

Memory83swap 4.3 of 5.0 GB

CPU131.3 of 10 cores

30 min agoNow

Running nowMemCPU

ClaudeApp + 9 sessions

7.2 GB2%

Dev servers17 running · 14 stale

0.2 GB0%

LeftoversNothing orphaned

All clear

Stop idle serversQuit

See what your AI tools are doing on your Mac

S1 is a menu bar app that brings your AI sessions and test runs together with the Mac resources they’re using. See memory and CPU at a glance, with the last 30 minutes underneath. If memory pressure rises or CPU stays above 85% for a minute, S1 turns red. No pop-ups.

This Mac32 GB · 10 cores

Memory62swap 2.1 of 5.0 GB

CPU151.5 of 10 cores

80%

30 min agoNow

Find the session behind the activity

See Claude sessions by title, with their project, memory and CPU use, and whether they’re working or waiting. Playwright and Puppeteer browsers appear under the test run that started them, so a pile of Chrome processes is easy to make sense of. Other coding agents like Codex and Cursor’s agent, and local model servers, appear in the same view.

← Running now

Claude

6 sessions

SessionsMemCPU

Go straight to the chat doing the work

Click a Claude session to open that exact conversation in the Claude app. See what’s running, jump into the chat behind it, and talk to the AI that started the work.

Working

Checkout tests

checkout-flow · 6 min

Memory0.6 GB

CPU7%

Runninge2e.spec.ts

Open chat

Clean up work that’s been left running

S1 finds browsers and servers left behind after a session ends. Before anything stops, it shows you exactly what will stop and checks that the process is still the same one. For a run a Claude session started, open its chat and ask it to stop. For other agents, open the project folder and decide what to do.

← Running now

Leftovers

3 things nothing is using

Sweep all

Install S1

S1 is free and the code is on GitHub. You build it on your own Mac with three commands. It takes about a minute.

View on GitHub

1
Get Apple’s command line tools
Skip this if you already use Git or Xcode.
```
xcode-select --install
```

Download S1 and build it

Paste these into Terminal.

git clone https://github.com/stevesalgado/s1.git
cd s1
./build.sh

3
Open it
S1 is now in the Applications folder in your home folder. Open it once and its meter stays in your menu bar.

Runs on

macOS 14 or later

Watches

Test runs, Claude sessions, dev servers, leftovers, other AI

Privacy

Nothing leaves your Mac. No account, no network, no analytics.

Price

Free and open source (MIT)

Works with Claude Code. Not made by Anthropic.