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# April 15th, 2026

## April 15th, 2026: The Surgical Swipe-Up

After the success of our Samsung-optimized recent-apps purge, today we focused on making that same "Fail-Closed" security work on non-Samsung devices like Lenovo, Motorola, and Pixel.

### Precision Coordinate Gestures

Different devices have different ways of handling the recent apps tray. Some use a "Close All" button, while others require a "flick" or "swipe-up" gesture. Today, I implemented a surgical swipe-up fallback in the Kotlin `BlockerAccessibilityService`.

Using `DisplayMetrics` for precision coordinate calculation, I built the `executeSwipeUpGesture` helper. This allows the enforcer to programmatically "flick" restricted apps out of the recent tray if the button-based purge fails. I had to authorize native gestures in `blocker_config.xml` to make this possible, but the result is a much more universal anti-tamper engine.

### High-Resolution Diagnostics

Debugging gestures is notoriously difficult. I added high-resolution diagnostic logs—`[GESTURE_DEBUG]` and `[RECENTS_PURGE]`—that allow for real-time enforcement auditing via `adb logcat`. Now, I can see exactly where the enforcer is "clicking" or "swiping" and verify its effectiveness across different device architectures.

### Performance & Safety

The gesture-based purge is now integrated as Check #1 in our security audit sequence. This ensures that even if a user tries to hide a restricted settings app in the background, it is physically neutralized before the hardware screen lock is applied. I also fixed a scope-related compilation error in the candidates fuzzy scan logic, making the whole enforcement pulse much more stable.

Day 15 has successfully extended our high-security "Vault" to a much wider range of Android devices.

***

### Technical Summary

* **Native Security**: Implemented `executeSwipeUpGesture` for universal recent-apps purges.
* **Coordinates**: Used `DisplayMetrics` to ensure precision across different screen resolutions.
* **Audit**: Refactored `dismissTopRecentApp` to trigger gesture-based flicking if the Samsung-path fails.
* **Diagnostics**: Integrated `[GESTURE_DEBUG]` and `[RECENTS_PURGE]` logs for real-time enforcement auditing.