# **Drift Profiles — RTT/1**  
### *Profile Dictionary for the Drift Sentinel (DS)*

Drift profiles define the **canonical shapes, behaviors, amplification patterns, stability basins, and collapse geometries** of drift across conceptual, computational, physical, and dimensional regimes.

These profiles are used by:

- **DS‑Detect**  
- **DS‑Vector**  
- **DS‑Envelope**  
- **DS‑Field**  
- **DS‑Amplify**  
- **DS‑Stabilize**

Each profile includes:

- **definition**  
- **drift signature**  
- **field behavior**  
- **amplification behavior**  
- **basin geometry**  
- **stability envelope**  
- **canonical DS output pattern**

---

## **1. Structural Drift Profiles**

### **Profile: Structural Invariant Drift**
**Definition**  
Drift emerging from violation of structural invariants (symmetry, conservation, monotonicity).

**Drift Signature**
- medium‑high magnitude  
- stable direction  
- low curvature  

**Field Behavior**
- narrow drift field  
- shallow ridge  

**Amplification Behavior**
- low amplification sensitivity  

**Basin Geometry**
- shallow basin  
- rigid boundary  

**Stability Envelope**
- high stability  

---

### **Profile: Calibration‑Mismatch Drift**
**Definition**  
Drift caused by divergence between computational calibration and physical measurement.

**Drift Signature**
- medium magnitude  
- oscillating direction  
- calibration curvature  

**Field Behavior**
- moderate field width  
- calibration ridge  

**Amplification Behavior**
- medium amplification sensitivity  

**Basin Geometry**
- medium depth  

**Stability Envelope**
- medium stability  

---

## **2. Gradient Drift Profiles**

### **Profile: Drift Gradient Opposition**
**Definition**  
Drift gradients across regimes oppose each other.

**Drift Signature**
- high magnitude  
- bidirectional vector  
- high curvature  

**Field Behavior**
- wide drift field  
- ridge inversion  

**Amplification Behavior**
- medium‑high amplification  

**Basin Geometry**
- deep basin  

**Stability Envelope**
- medium stability  

---

### **Profile: Drift Gradient Inversion**
**Definition**  
Drift decreases in one regime while increasing in another.

**Drift Signature**
- medium‑high magnitude  
- inversion vector  
- polarity flip  

**Field Behavior**
- medium field width  
- inversion curvature  

**Amplification Behavior**
- high amplification sensitivity  

**Basin Geometry**
- medium‑deep basin  

**Stability Envelope**
- medium‑low stability  

---

## **3. Boundary Drift Profiles**

### **Profile: Abstraction‑Measurement Drift**
**Definition**  
Drift formed at the boundary between conceptual abstraction and physical measurement.

**Drift Signature**
- medium magnitude  
- abstraction → measurement direction  
- boundary curvature  

**Field Behavior**
- narrow field  
- boundary ridge  

**Amplification Behavior**
- low amplification  

**Basin Geometry**
- shallow basin  

**Stability Envelope**
- medium‑high stability  

---

### **Profile: Gradient‑Boundary Drift**
**Definition**  
Aligned gradients across regimes produce contradictory drift outcomes.

**Drift Signature**
- high magnitude  
- aligned direction  
- medium curvature  

**Field Behavior**
- wide field  
- alignment trough  

**Amplification Behavior**
- medium amplification  

**Basin Geometry**
- medium‑deep basin  

**Stability Envelope**
- medium stability  

---

## **4. Drift‑Field Profiles**

### **Profile: Multi‑Regime Drift Field**
**Definition**  
A multi‑regime drift tensor binds drift across R1–R3 or R1–R4.

**Drift Signature**
- very high magnitude  
- tensor direction  
- high curvature  

**Field Behavior**
- wide drift field  
- tensor topology  

**Amplification Behavior**
- high amplification  

**Basin Geometry**
- deep basin  

**Stability Envelope**
- medium‑high stability  

---

### **Profile: Dimensional Drift Constraint**
**Definition**  
Dimensional constraints influence computational drift pathways.

**Drift Signature**
- high magnitude  
- dimensional → computational direction  
- medium‑high curvature  

**Field Behavior**
- medium‑wide field  
- tensor trough  

**Amplification Behavior**
- medium amplification  

**Basin Geometry**
- medium‑deep basin  

**Stability Envelope**
- medium stability  

---

## **5. Drift Amplification Profiles**

### **Profile: Drift Amplification Basin**
**Definition**  
Drift amplification creates a drift collapse basin.

**Drift Signature**
- very high magnitude  
- amplification‑aligned direction  
- high curvature  

**Field Behavior**
- wide field  
- amplification basin  

**Amplification Behavior**
- very high amplification  

**Basin Geometry**
- deep collapse basin  
- instability ridge  

**Stability Envelope**
- low stability  

---

### **Profile: Drift‑Coherence Amplification**
**Definition**  
Drift increases coherence sensitivity, amplifying drift curvature.

**Drift Signature**
- medium‑high magnitude  
- coherence‑aligned direction  
- medium‑high curvature  

**Field Behavior**
- medium field  
- amplification ridge  

**Amplification Behavior**
- high amplification  

**Basin Geometry**
- medium‑deep basin  

**Stability Envelope**
- medium‑low stability  

---

## **6. Canonical DS Output Pattern**

```json
{
  "drift_type": "gradient",
  "regime": "R1-R4",
  "drift_magnitude": 0.83,
  "drift_direction": "R1↔R4",
  "drift_curvature": 0.51,
  "amplification_zone": 0.22,
  "stability_basin": 0.69,
  "envelope_boundary": 0.46
}
```

---

## **Status**

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