> ## Documentation Index
> Fetch the complete documentation index at: https://docs.burakov.net/llms.txt
> Use this file to discover all available pages before exploring further.

# How it works

> Check-ins, the grace window, warnings, actions, and how a switch fires.

## The check-in loop

A switch is **armed** as long as you keep checking in. Each check-in is a deliberate action —
you confirm it with a PIN (or your device biometrics) so a check-in is never an accidental tap.
Checking in resets the deadline to the full interval.

You pick the rhythm with a **safety preset**, or set your own:

| Preset       | Check in every | Grace before firing |
| ------------ | -------------- | ------------------- |
| **Paranoid** | 1 week         | 3 days              |
| **Balanced** | 30 days        | 14 days             |
| **Legacy**   | 90 days        | 30 days             |

## The grace window

If a deadline passes, the switch does **not** fire immediately. It enters a **grace window**
and starts warning you — across push, email, and (on Pro) SMS. Every warning has a one-tap
**"I'm here"** that instantly re-arms the switch.

Only when the grace window fully elapses — after all the warnings — does the switch fire.

<Note>
  There is a hard safety floor: a switch can never fire less than **48 hours** after its
  deadline, and it must always warn you on at least two channels first. No custom setting can
  lower that.
</Note>

## Actions

A switch fires one or more **actions**, delivered to the recipients you chose:

<CardGroup cols={1}>
  <Card title="Message" icon="envelope">
    A text message or farewell letter. Send it end-to-end encrypted, or — if it's low-stakes —
    as a normal readable email. Your choice, clearly labelled.
  </Card>

  <Card title="Encrypted file or secret" icon="file-lock">
    Release a file, a set of credentials, or instructions. Always zero-knowledge — encrypted on
    your device, opened only by your recipient with the passphrase you shared out-of-band.
  </Card>

  <Card title="Private page" icon="link">
    A hosted page that opens for your chosen recipients via a private link. Same encryption
    options as a message.
  </Card>
</CardGroup>

## What fires a switch

In this version, a switch fires on **inactivity only** — a missed check-in plus the elapsed
grace period. That already covers what matters: if you're gone, you stop checking in. There is
no way for anyone else to trigger your switch early.