# 📐  L2 Spec — Jet Reconstruction (Anti-kT) — Nominal + Mismatch Specs

**ID:** `L2-487-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-487`](/artifact/l1/L1-487)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.4 · **Delta tier:** 5
> **⛓ On-chain block:** 41555319

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Pileup mu | — | 0 – 200 |
| Jet pt gev | — | 30 – 5000 |
| Jet radius r | — | 0.2 – 1.0 |
| N particles per event | — | 100 – 10000 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.03 + 0.02 * (pileup_mu / 50) ** 0.3
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.4 |
| Delta tier | 5 |

## 4. Fingerprint

`2bf4d7e9eec2fba26029babe69447e181eab2c9f1839071210808938007b0726`

## 5. On-chain Registration

- **Chain hash:** `0x0a181cc1bc7feaf8aa33ca677182e5d1bb1e1a0ced6491ad9dab53f8a031a73f`
- **Chain tx hash:** `0x34595d9e0b60af9cdfc436dfd4fe20d3dae6c2a93d03a37ff799538b8c0a7e9b`
- **Chain block:** `41555319`

---

## File Mapping

This bundle consists of: `L2-487-001.md`, `L2-487-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-487-001.md` | Source of truth — edit this | Human or LLM |
| `L2-487-001.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 `L2-487-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._