# 📐  L2 Spec — Chest CT Pneumonia/COVID Severity Classification (PWDR) — Spec Skeleton

**ID:** `L2-514-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-514`](/artifact/l1/L1-514)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41552981

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 256 – 1024 |
| W | px | 256 – 1024 |
| Z | — | 50 – 1000 |
| Kvp | — | 80 – 140 |
| Mas | — | [NEEDS_HAND_AUTHORING: bounds] |
| Snr db | dB | [NEEDS_HAND_AUTHORING: bounds] |
| Voxel size mm | mm | [NEEDS_HAND_AUTHORING: bounds] |
| Slice thickness mm | mm | 0.5 – 5.0 |
| Kv calibration drift | — | [NEEDS_HAND_AUTHORING: bounds] |
| Lobe segmentation error | — | [NEEDS_HAND_AUTHORING: bounds] |
| Motion blur breath hold | — | [NEEDS_HAND_AUTHORING: bounds] |
| Contrast enhancement state | — | [NEEDS_HAND_AUTHORING: bounds] |
| Slice thickness anisotropy | — | [NEEDS_HAND_AUTHORING: bounds] |
| Threshold calibration uncertainty | — | [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

`190e561b4556641f3a5e588b4467589b2b069226917826d0e3c121b38c0a9697`

## 5. On-chain Registration

- **Chain hash:** `0xc5d99c0260676542311ce227da10899ad5cefaf29479dc28104875f8e74c586a`
- **Chain tx hash:** `0xb2599f65b9d335c87600595b05864cb505c40088459949ff997124e63a5f11b0`
- **Chain block:** `41552981`

---

## File Mapping

This bundle consists of: `L2-514-001.md`, `L2-514-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-514-001.md` | Source of truth — edit this | Human or LLM |
| `L2-514-001.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 `L2-514-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._