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

# Strict Mode Setup

> The immutability lock activation screen.

# Strict Mode Setup

The (strict-mode)/setup.tsx screen allows the user to activate Strict Mode on a commitment, making it immutable for a configured duration.

***

## What Strict Mode Does

When activated, Strict Mode sets a strict\_until timestamp on both the task and its instances. Until that timestamp passes, the Convex backend rejects all mutations (edits, deletions) on the locked entities:

```
strict_until = Date.now() + (duration_days * 24 * 60 * 60 * 1000)
```

***

## Configuration

The setup screen provides:

* **Duration Selector** -- Choose the lock duration (e.g., 7 days, 14 days, 30 days)
* **Confirmation Modal** -- Explicit confirmation that the user understands the commitment cannot be modified or deleted until the lock expires
* **Visual Warning** -- Clear indication that this action is irreversible

***

## Security Enforcement

Strict Mode is enforced at three levels:

| Level      | Mechanism                                                                        |
| :--------- | :------------------------------------------------------------------------------- |
| **Cloud**  | Convex mutations check strict\_until before any edit/delete                      |
| **Local**  | SQLite queries filter strict-locked instances from edit screens                  |
| **Native** | The Kotlin Accessibility Service blocks access to Settings during strict periods |