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# SSK_Physics Architecture
> [!IMPORTANT]
> **Version Control and State Tracking Rule**:
> This repository exclusively uses **`lore`** for version control, state management, and documentation tracking. **Do NOT use `git`**.
---
## 1. Overview and Purpose
`SSK_Physics` is the foundational physics calculation engine within the **SovereignSurvivalKit** architecture. It provides multidimensional state inversion, time-to-contact dynamic tracking, amodal measurements, and reverse provenance graph validation.
The module operates without dependencies on other workspace packages, providing base mathematical and physical primitives to `SSK_Abstractions` and higher-level modules.
---
## 2. Package Specifications
Defined in [`Package.swift`](file:///Users/voxels/SovereignSurvivalKit/src/SovereignSurvivalKit/Modules/SSK_Physics/Package.swift):
- **Target Name**: `SSK_Physics`
- **Swift Tools Version**: `6.4`
- **Supported Platforms**: macOS 27.0+, iOS 27.0+
- **Internal Dependencies**: None
- **External Dependencies**: None
---
## 3. Component Architecture and Files
```text
Sources/SSK_Physics/
├── reverse_provenance_engine.swift # Reverse-time graph validation & deviation solver
├── universal_amodal_processor.swift # Multi-dimensional tau-tensor & amodal inversion engine
└── ReverseProvenance.archive # Pre-compiled Metal GPU compute shader archive
```
### 1. Reverse Provenance Engine (`reverse_provenance_engine.swift`)
Calculates reverse-time structural deviations and verifies soft-landing stability thresholds:
- **Metal GPU Compute**: Executes GPU compute pipelines via `ReverseProvenance.archive` to compute squared deviations in parallel across Apple Silicon GPUs.
- **Accelerate CPU Fallback**: Uses Apple `Accelerate` `vDSP` routines if Metal compute devices are not available.
- **Core Entity**: `ProvenanceNode` (stores timestamp, `AmodalMeasurement`, and $\dot{\tau}$ values).
### 2. Universal Amodal Processor (`universal_amodal_processor.swift`)
Manages multi-dimensional $\tau$-tensor states and structural amodal inversions:
- **`AmodalInversionEngine`**: Maintains the active `stateTensor`, calculating velocity, gap distance, $\tau$, and $\dot{\tau}$ from incoming measurements.
- **Harmonic Convergence**: Computes the composite Harmonic Convergence Metric $\Psi$ across dimensions to evaluate system synchronization.
---
## 4. Dependencies
### System Framework Dependencies
- **`Accelerate` (`vDSP`)**: High-performance vector math and digital signal processing.
- **`Metal`**: Hardware-accelerated GPGPU compute kernel execution.
- **`Foundation`**: Core Swift data types and `Codable` serialization.
---
## 5. Architectural Position
```text
SSK_Abstractions
▲
│
SSK_Physics
(Core Mathematical Primitives)
```

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