---
skill_id: esp-delivery-critic
evaluation: free
price_usd_full: 0.35
challenge: https://lvlltd.com/api/pay?skill=esp-delivery-critic
outline: https://lvlltd.com/skills/esp-delivery-critic/outline.json
standards: x402, ERC-7857
---

# Free sample — ESP Delivery Critic

**Skill ID:** `esp-delivery-critic`  
**Full unlock:** $0.35 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=esp-delivery-critic  
**Outline JSON:** https://lvlltd.com/skills/esp-delivery-critic/outline.json

## Summary

Critique sealed pack deliveries for completeness, installability, and decision utility — free sample rubric before settle.

## When to use

- After sealed unlock, before using pack in production
- Compare two candidate packs after free-eval
- Write improvement notes for recursive rework

## Decision criteria (buy vs skip)

- You need this when: After sealed unlock, before using pack in production
- You get capability: Pack completeness critique
- Budget fits: full unlock is $0.35 USDC on Base
- You can automate unlock via HTTP 402 without a browser
- You only need teaser/outline first — sealed src/ops stay locked until payment

## Outline (preview)

1. Inventory pack files vs claimed capabilities
2. Check install/SKILL.md presence
3. Score decision utility of free outline vs sealed
4. List blocking gaps
5. Recommend rework or accept

## Capabilities (preview)

- Pack completeness critique
- Install path review
- Gap list
- Rework recommendations

## What you get after payment

- SKILL.md (teaser public)
- agent-install.json (public meta)
- src/index.js (stub public; full after unlock)
- Full sealed: src/, schemas/, ops/* (when present) after verified X-PAYMENT

## Agent buy path (zero human UI)

```
GET  https://lvlltd.com/skills/esp-delivery-critic/outline.json
GET  https://lvlltd.com/api/pay?skill=esp-delivery-critic   → HTTP 402
# transfer maxAmountRequired USDC to payTo on Base
POST https://lvlltd.com/api/pay
  X-PAYMENT: {"txHash":"0x…","skill":"esp-delivery-critic"}
# response.sealed_pack.files = full pack
```

## Sample excerpt

# ESP Delivery Critic

**Price:** $0.35 USDC  
**Category:** Trust  
**Version:** 1.0.0  
**Protocols:** x402, ERC-7857  
**Tags:** esp, esp-judge, critic, x402, evaluator, p1, quality, depth:outline_only, demoted-default  

## Summary

Critique sealed pack deliveries for completeness, installability, and decision utility — free sample rubric before settle.

## Description

ESP critic skill: structured critique of agent deliverables without inventing quality scores.

## When to use

- After sealed unlock, before using pack in production
- Compare two candidate packs after free-eval
- Write improvement notes for recursive rework

## After purchase (lvlltd.com)

1. Pay USDC on Base via x402 to the treasury
2. POST `/api/pay` with `X-PAYMENT: {"txHash","skill":"esp-delivery-critic"}`
3. Receive `sealed_pack.files` (code + docs)
4. Install: `node scripts/install-unlocked-pack.mjs unlock.json ./skills`
5. `import { createSkill } from './skills/esp-delivery-critic/src/index.js'`

## Standards

- x402 micropayments (Base USDC / USDbC)
- ERC-7857 sealed iNFT ownership record (marketplace unlock ≠ runtime design)
- Operational packages ship as sealed pack files after verified payment

## Safety

- No secrets, private keys, or exploit content
- Human escalate on high blast-radius actions
- Not legal, tax, medical, or financial advice