# 📐 L2 Spec — Dermoscopy Skin Lesion Malignancy Classification (PWDR) — Spec Skeleton
**ID:** `L2-517-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-517`](/artifact/l1/L1-517)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553390
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 512 – 6000 |
| W | px | 512 – 6000 |
| Snr db | dB | [NEEDS_HAND_AUTHORING: bounds] |
| Hair artifact | — | [NEEDS_HAND_AUTHORING: bounds] |
| Magnification | — | 10 – 50 |
| Polarization state | — | [NEEDS_HAND_AUTHORING: bounds] |
| Pixel resolution um | µm | 20 – 200 |
| Gel immersion uniformity | — | [NEEDS_HAND_AUTHORING: bounds] |
| Photographic color calibration | — | [NEEDS_HAND_AUTHORING: bounds] |
| Dermoscope polarization efficiency | — | [NEEDS_HAND_AUTHORING: bounds] |
| Manual feature scoring disagreement | — | [NEEDS_HAND_AUTHORING: bounds] |
| Lesion contrast against skin background | — | [NEEDS_HAND_AUTHORING: bounds] |
## 2. Tolerance (ε)
**Type:** `fn`
```
0.85_accuracy
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`e87f6913ccfcdaeae51fd93b798f5e3351bf4523d6501e73faf36782fac491a5`
## 5. On-chain Registration
- **Chain hash:** `0xb8c0256f6d899d029525bae7746227f47af03cf6e86fb890be1b2c16ad1639fc`
- **Chain tx hash:** `0xb6d265cbe036c8d65759ed5d8705f00760b3f455a769019e7d763e9791e6e26c`
- **Chain block:** `41553390`
---
## File Mapping
This bundle consists of: `L2-517-001.md`, `L2-517-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-517-001.md` | Source of truth — edit this | Human or LLM |
| `L2-517-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-517-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._