Push for anything a shell can say.
Pick one to see it.
Your phone, Mac off
An agent on a GPU box, the iPhone in your pocket, the Mac switched off — the case that matters most. The host sends the notification itself; a tap opens the pane where it’s asking.
Anything a program says
An agent that’s blocked or done, any program’s own notification (OSC 9 / 777 / 99), a long command that ended — sent by the host itself. No hook goes into an agent’s settings: the keeper reads the screen, so every program is covered.
Your own triggers
A pattern you choose — “loss: nan”, “FAILED”, a deploy hash — turns any line of output into a mark and a notification while SpectaShell is open; a host never sends them. Triggers sync through your iCloud.
pushed
SPECTASHELLnowOnly when you’re away
A notification goes out only when none of your devices is in front. What comes while you’re looking is held, so leaving the desk doesn’t lose it.
- ✓your device's notification token
- ✓the public keys of the hosts that notify it (so how many there are)
- ✓when and how often each sends
- ✓It sees each request's address, as any server does, and writes none down.
- ✕what a notification says
- ✕which host it is
- ✕any file
- ✕any key that signs or opens
The relay can’t read it
Apple delivers to an app only from the holder of its push key, so a relay of Calida Lab’s stands between your hosts and Apple. Each host seals what it sends to a key your device made; the relay passes sealed bytes on and keeps none of them.
Details: the Security page, “Notifications from hosts”.
One switch per device
Turn on Notify This Device and every host you use can reach it. No per-host settings to find, no thresholds to tune on each device.
| Property |  Moshi | SpectaShell |
|---|---|---|
| Set-up on the server | moshi-hook, which writes itself into each agent’s settings | nothing — the keeper reads the screen |
| What can notify | agents with the hook; scripts through moshi-hook notify or a webhook | agents, any program’s own notifications, ended commands — nothing to install |
| Encryption | optional | always on |
| What its server sees | the agent, the event and your host’s IP; with encryption off, project names and parts of prompts too | when a host sends — never what, nor which host |
Next to Moshi
Agent alerts on your phone, as you know them — from any program, with nothing installed in the agent, sealed end to end.
Moshi as its documentation describes it on 2026-11-01.