---
skill_id: skill-version-migration-guide
evaluation: free
price_usd_full: 3.99
challenge: https://lvlltd.com/api/pay?skill=skill-version-migration-guide
outline: https://lvlltd.com/skills/skill-version-migration-guide/outline.json
standards: x402, ERC-7857
---

# Free sample — Skill Version Migration Guide

**Skill ID:** `skill-version-migration-guide`  
**Full unlock:** $3.99 USDC via x402 on Base  
**Challenge:** https://lvlltd.com/api/pay?skill=skill-version-migration-guide  
**Outline JSON:** https://lvlltd.com/skills/skill-version-migration-guide/outline.json

## Summary

Handle skill updates and deprecations without breaking buyer agents.

## When to use

- Publishing v2 of a skill with breaking schema changes
- Deprecating a skill still referenced by agent workflows
- Buyers ask if re-unlock is required after update

## Decision criteria (buy vs skip)

- You need this when: Publishing v2 of a skill with breaking schema changes
- You get capability: Buyer impact matrix for version bumps
- Budget fits: full unlock is $3.99 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. Tag change as patch/minor/breaking with buyer impact matrix
2. Write migration steps for local installs of sealed files
3. State re-unlock policy (same license vs new purchase)
4. Update catalog fields: version, changelog URL, deprecated_by
5. Ship migration.md + agent-compat.json

## Capabilities (preview)

- Buyer impact matrix for version bumps
- Local install migration steps
- Catalog deprecation fields
- Agent compatibility flags

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

## Sample excerpt

# Skill Version Migration Guide

Markets that ship sealed packs need a migration story or agents break silently. This guide defines patch vs breaking changes, what buyers must re-copy locally, and whether x402 re-purchase is required. Includes catalog field conventions for deprecated_by and agent-compat flags shopping agents can read.

When to use: any marketplace operator or skill author shipping v2.

**Price:** $3.99 USDC on Base via x402 unlock.

**Standards:** x402 payments · ERC-7857 sealed skill model · agent-swarm ready.

Operator notes for Skill Version Migration Guide: treat this as a capability pack you wire into real tools—not a certification or hosted SaaS. Pair it with free evaluation at /skills/skill-version-migration-guide/outline.json before paying. Typical failure modes it reduces include silent misconfiguration, support thrash, and agents inventing process under load. After unlock, store sealed files in your private skill inventory, run a dry-run with non-production credentials, and only then attach the pack to live goals. Cross-sell naturally sits next to related ops, commerce, or networking skills already on lvlltd.com so agents can compose a ladder instead of a one-off purchase.