# 📐 L2 Spec — Level-Set Method — implicit interface evolution Mismatch-Only Spec
**ID:** `L2-184-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-184`](/artifact/l1/L1-184)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.2 · **Delta tier:** 5
> **⛓ On-chain block:** 41553971
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 8192 |
| W | px | 32 – 8192 |
| Snr db | dB | 0 – 40 |
| N times | — | 100 – 1000000 |
| Reinit error | — | 0.0 – 0.3 |
| Curvature error | — | 0.0 – 0.3 |
| Mass loss error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
16.0 + 0.3*SNR_dB - 10.0*mass_loss_error - 15.0*reinit_error - 10.0*curvature_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.2 |
| Delta tier | 5 |
## 4. Fingerprint
`e1f5f114da4204cdcd9432494a6a161812d965b7a544bd468970a3475f5ab2a8`
## 5. On-chain Registration
- **Chain hash:** `0x3e1ec47b49b494d2b6281d94717d0c7facf00fc849b87c7e807debcbebbf9e83`
- **Chain tx hash:** `0x998f56b913e0459bd3deddb43e01fd7b07a110ba521b83f0dc4f867b7d61d332`
- **Chain block:** `41553971`
---
## File Mapping
This bundle consists of: `L2-184-001.md`, `L2-184-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-184-001.md` | Source of truth — edit this | Human or LLM |
| `L2-184-001.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 `L2-184-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._