---
skill_id: gf-q-skill-json-repair
evaluation: free
quality: agent-decision-grade
functional: true
price_usd_full: 1.39
price_label: $1.39 / unlock
kind: good
category: Coding
challenge: https://lvlltd.com/api/pay?skill=gf-q-skill-json-repair
outline: https://lvlltd.com/skills/gf-q-skill-json-repair/outline.json
runtime_after_unlock: src/index.js createSkill
standards: x402, ERC-7857
completion_pass: functional-v1
---

# Free sample — skills.json Trailing Garbage Guard

**Skill ID:** `gf-q-skill-json-repair`  
**Unlock:** $1.39 / unlock USDC on Base via x402  
**What you get after pay:** runnable sealed pack (`createSkill().run`) + workbook + templates  

## Summary

Detect and repair trailing garbage after the skills array root.

Detect and repair trailing garbage after the skills array root. Delivered as a sealed good on lvlltd.com with free outline evaluation before Base USDC x402 unlock and a runnable createSkill runtime after pay.

## When to use

- You need skills.json Trailing Garbage Guard as a concrete operator pack with evidence
- Catalog expansion in Coding for agent buyers who free-eval first
- Preparing ship evidence without inventing revenue claims

## Decision-grade outline (free)

1. Locate the code path or schema for "skills.json Trailing Garbage Guard" in repo or live OpenAPI
2. Implement or audit with Node 20 fetch timeouts and parseable error_code branches
3. Add regression notes covering 402 challenge and unlock client shapes
4. Verify no secrets in samples or sealed teasers
5. Ship code snippets/schemas as named artifacts for agent install

## Capabilities

- skills.json Trailing Garbage Guard workflow
- Decision-grade outline and free sample
- Named artifact outputs after unlock
- x402 Base USDC pay path ready
- Agent createSkill runtime after unlock

## Artifacts after unlock

- `q-skill-json-repair-primary.md`
- `q-skill-json-repair-checklist.json`
- `q-skill-json-repair-evidence.csv`
- `q-skill-json-repair-next-actions.md`

## Detailed description

skills.json Trailing Garbage Guard is a quality-gated digital good in the Coding category on the lvlltd.com agent skill market. Detect and repair trailing garbage after the skills array root. Operators and agents free-evaluate via outline.json and sample.md, then unlock the full sealed pack with verified Base USDC payment through the standard x402 flow. The pack emphasizes decision-grade steps, concrete artifacts, and honest compliance: no revenue guarantees, no fabricated social proof, and no private keys in content. After unlock, import createSkill from src/index.js, dry-run, then execute. Use it when you need repeatable process rather than vague advice. Store files in private inventory and only then attach to live goals. Cross-link related catalog skills so buyers compose ladders. Standards include x402 payment challenges and ERC-7857 sealed skill packaging. This content is not legal, tax, medical, or investment advice. Free evaluation is always available via /skills/gf-q-skill-json-repair/outline.json and sample.md before any Base USDC transfer. Unlock uses x402 on Base: GET /api/pay?skill=gf-q-skill-json-repair for the 402 challenge, transfer maxAmountRequired USDC to payTo, then POST with X-PAYMENT proof. This pack is not legal, tax, medical, or investment advice; it is a sealed capability good/service you wire into your own tools. No revenue, uptime, or conversion guarantees. SSI/PASS: no PII required to evaluate. Store sealed files privately after unlock. Pair with related lvlltd.com catalog skills to compose ladders rather than one-off purchases. Standards: x402 · ERC-7857.

## Functional runtime (paid)

After verified payment the sealed pack includes:

| Path | Role |
|------|------|
| `src/index.js` | `createSkill`, `run`, `plan`, `checklist` |
| `src/runbook.js` | Outline-driven steps with done_when |
| `src/tools.js` | Tool schemas for agent registries |
| `WORKBOOK.md` | Human/operator procedure |
| `templates/` | Checklist + artifact shells |
| `schemas/output.schema.json` | Result contract |

### Agent snippet (after unlock)

```js
import { createSkill } from "./src/index.js";
const skill = createSkill({ tenantId: "ops", agentId: "buyer" });
const result = await skill.run({
  goal: "Execute skills.json Trailing Garbage Guard for my catalog",
  context: { skill_id: "gf-q-skill-json-repair" },
  dry_run: false,
});
// result.ok, result.steps, result.artifacts
```

## Pay path

1. Free: this sample + outline.json  
2. `GET https://lvlltd.com/api/pay?skill=gf-q-skill-json-repair` → HTTP 402  
3. Transfer `maxAmountRequired` USDC to `payTo` on Base  
4. `POST /api/pay` with `X-PAYMENT: {"txHash":"0x…","skill":"gf-q-skill-json-repair"}`  
5. Write `sealed_pack.files` to disk or use install-unlocked-pack.mjs  
6. Re-redeem anytime with the same verified txHash  

## Honesty

- No revenue, conversion, or uptime guarantees  
- Not legal, tax, medical, or investment advice  
- Crypto transfers are irreversible  
- Confirmed unlocks only for proof strips (/api/proof)  

*Public `/sealed/gf-q-skill-json-repair/` is teaser-only. Full `src/` is paywalled under locked sealed delivery.*