# **SFD Operators — RTT/1**  
### *Operator Grammar for the Structural Faultline Detector (SFD)*

The **Structural Faultline Detector (SFD)** defines the structural‑layer intelligence of RTT.  
Its operators detect structural fractures, map faultlines, identify instability seams, evaluate propagation pathways, and propose stabilization strategies.

These operators feed directly into:

- **SBC** — Stability Basin Cartographer  
- **TRS‑Temporal** — Temporal Regime Sequencer  
- **CW** — Cross‑Domain Causality Weaver  
- **DRS** — Dimensional Resonance Scanner  

---

## **1. SFD‑Detect**  
### *Detect structural faultlines and fracture onset conditions*

**Purpose**  
Identify structural fractures arising from invariant violations, gradient contradictions, boundary inconsistencies, or multi‑regime structural interactions.

**Capabilities**  
- detects fracture onset  
- identifies fracture polarity  
- classifies faultline type  
- evaluates structural dependency  
- detects drift‑sensitive structural interactions  

**Output Fields**  
- `faultline_type`  
- `fracture_onset`  
- `fracture_polarity`  
- `structural_dependency`  

---

## **2. SFD‑Fracture**  
### *Analyze fracture magnitude, direction, and severity*

**Purpose**  
Compute fracture magnitude, direction, curvature, and severity across regimes.

**Capabilities**  
- computes fracture magnitude  
- computes fracture direction  
- computes fracture curvature  
- computes fracture severity  
- computes fracture‑gradient alignment  

**Output Fields**  
- `fracture_magnitude`  
- `fracture_direction`  
- `fracture_curvature`  
- `fracture_severity`  
- `fracture_alignment`  

---

## **3. SFD‑Seam**  
### *Identify instability seams and discontinuity boundaries*

**Purpose**  
Detect instability seams, discontinuity boundaries, collapse‑point seams, and seam curvature.

**Capabilities**  
- detects instability seams  
- computes seam curvature  
- detects collapse‑point seams  
- evaluates seam stability  
- evaluates seam propagation sensitivity  

**Output Fields**  
- `instability_seam`  
- `seam_curvature`  
- `collapse_seam`  
- `seam_stability`  

---

## **4. SFD‑Field**  
### *Map structural faultline fields and topology*

**Purpose**  
Generate faultline field maps showing structural wells, ridges, basins, and multi‑regime structural topology.

**Capabilities**  
- maps faultline fields  
- maps structural wells  
- maps structural ridges  
- maps structural basins  
- maps structural topology  

**Output Fields**  
- `field_map`  
- `ridge_map`  
- `basin_map`  
- `well_map`  
- `topology_map`  

---

## **5. SFD‑Propagate**  
### *Detect faultline propagation and instability growth*

**Purpose**  
Identify propagation pathways, propagation magnitude, propagation curvature, and instability growth.

**Capabilities**  
- detects propagation pathways  
- computes propagation magnitude  
- computes propagation curvature  
- evaluates propagation sensitivity  
- identifies propagation‑driven collapse  

**Output Fields**  
- `propagation_rate`  
- `propagation_direction`  
- `propagation_curvature`  
- `propagation_sensitivity`  
- `propagation_collapse`  

---

## **6. SFD‑Stabilize**  
### *Propose structural stabilization pathways*

**Purpose**  
Provide stabilization strategies for structural fractures, faultline fields, instability seams, and collapse basins.

**Capabilities**  
- proposes stabilization pathways  
- proposes structural alignment  
- proposes fracture reduction  
- proposes seam reinforcement  
- proposes collapse mitigation  

**Output Fields**  
- `stabilization_pathway`  
- `structural_alignment`  
- `fracture_reduction`  
- `seam_reinforcement`  
- `collapse_mitigation`  

---

## **7. Operator Interaction Grammar**

### **Detect → Fracture → Seam → Field → Propagate → Stabilize**

1. **SFD‑Detect**  
   Identifies fracture onset and faultline type.

2. **SFD‑Fracture**  
   Computes fracture magnitude, direction, curvature, and severity.

3. **SFD‑Seam**  
   Defines instability seams, seam curvature, and collapse‑point seams.

4. **SFD‑Field**  
   Maps faultline fields, wells, ridges, basins, and topology.

5. **SFD‑Propagate**  
   Detects propagation pathways and propagation curvature.

6. **SFD‑Stabilize**  
   Produces stabilization pathways and structural‑alignment strategies.

This grammar ensures deterministic structural‑layer behavior.

---

## **8. Operator Matrix Snippet**

```json
{
  "operator": "SFD-Fracture",
  "fracture_magnitude": 0.83,
  "fracture_direction": "R1↔R4",
  "fracture_curvature": 0.52,
  "fracture_severity": 0.33,
  "fracture_alignment": 0.69
}
```

---

## **Status**

- **Version:** 1.0  
- **Status:** canon‑stable  
- **Category:** rtt‑structural  
- **Module Path:** `/docs/rtt/Structural_Faultline_Detector/`