Close the lid.
Your AI keeps working.
Awake while your agents work. Asleep when they're done.
Download for Mac
How it works
Install
Password once.
Start your agent
Found on its own.
Close the lid
It keeps working.
Less battery, lid shut
18.3 W → 3.1 W
One test on an M5 Max MacBook Pro with iOS simulators open. Yours will differ, and Nocturnal measures your own.
You're in control
Knows when Claude Code needs you
Sleeps when it's done
No lock screen
Battery and heat limits
Puts everything back
Check on it from your phone
On the laptop: Nocturnal › Settings › Phone, then scan. Add it to your Home Screen and it opens like an app.
End-to-end encrypted, a key for each phone. iPhone app coming soon. Open the phone page
Your AI can use it too
Connect it in Settings › Agents, then give your agent this prompt.
Nocturnal is installed on this laptop. It keeps the machine awake with the lid closed while you work, and cuts power use while the lid is shut. You can control all of it through the nocturnal MCP tools (or the nocturnal command). Set it up for me: 1. Read Nocturnal's settings and power report to see every setting and what is using power right now. 2. Ask me, in one short message: which apps must keep running at full speed with the lid shut (music, calls, a local model, Docker...), and whether it should stay awake only while agents work or always. 3. Apply the strongest savings that don't touch what I named: preset max_battery, pausing simulators and background audio, low power, and per-app rules. 4. If my lid is closed, run Nocturnal's power test and tell me what the savings are worth in watts. 5. From now on, keep the laptop awake through Nocturnal before long work and release it when done. Never turn off the heat guard or lower the battery limit; Nocturnal won't let you, and that's on purpose.
Questions
Safe in a bag?
It sleeps if it gets hot or the battery runs low.
What does it change?
Sleep, Low Power Mode, brightness and idle apps. Opening the lid puts it all back.
Lost internet with the lid shut?
On an iPhone hotspot, set System Settings › Wi‑Fi › Ask to join hotspots to Automatic.
Free?
Yes, and open source.