# KLT 5.1 Unified Flutter SDK Package

KLT 5.1 merges KLT 5.0, assembly 0.1 Projective Construction Graph Engine, KLT 5.01 Alpha, and the following KLT 5.02-FIN/Market module into one Flutter-ready program package.

Contents:

- `app/` - Flutter application with RU/EN/ZH interface.
- `core_python/` - runnable reference core and smoke tests for this environment.
- `examples/` - demo project, finance example, generated SVG diagrams and report.
- `docs/` - technical specification, operating principles, and full capabilities overview.
- `verification/` - structural checks, Python smoke run, and document QA logs.
- `legacy_sources/` - previous source packages used as consolidation base.

## Load into Flutter SDK

```bash
cd app
flutter pub get
flutter run
```

If Android/iOS/Web folders are missing in a fresh Flutter environment:

```bash
flutter create . --platforms=android,ios,web
flutter pub get
flutter run
```


## KLT 5.1.1 v9.6 quadratic lambda update

The engine now computes the original amplitude cross-ratio `lambda = cr(U,I;R,D)` and the quadratic PIX@PEAKS layer `lambda_quadratic = cr(U^2,I^2;R^2,D^2)`. The factor `Q_PX` records the quadratic obstruction: `lambda_quadratic = lambda * Q_PX` where defined. Existing fields remain backward compatible; the new status `quadratic_obstruction` identifies cases where amplitude harmony does not pass the quadratic metric layer.
