---
skill_id: gf-studio-thumbnail-ctr-hypotheses
evaluation: free
quality: agent-decision-grade
functional: true
price_usd_full: 3.99
price_label: $3.99 / unlock
kind: service
category: Creative
challenge: https://lvlltd.com/api/pay?skill=gf-studio-thumbnail-ctr-hypotheses
outline: https://lvlltd.com/skills/gf-studio-thumbnail-ctr-hypotheses/outline.json
runtime_after_unlock: src/index.js createSkill
standards: x402, ERC-7857
completion_pass: functional-v1
---

# Free sample — Thumbnail CTR Hypothesis Lab

**Skill ID:** `gf-studio-thumbnail-ctr-hypotheses`  
**Unlock:** $3.99 / unlock USDC on Base via x402  
**What you get after pay:** runnable sealed pack (`createSkill().run`) + workbook + templates  

## Summary

Design testable thumbnail CTR hypotheses: face vs object, text density, contrast, and A/B matrices without promising lift numbers.

Produce honest thumbnail experiment plans agents can run—hypotheses, variants, and kill criteria, not fake CTR benchmarks. Free outline + x402. No revenue guarantees.

## When to use

- Planning A/B or multivariate thumbnail tests for a series
- Agents generate thumbnails without a testable design hypothesis
- Need kill criteria before spending more creative rounds

## Decision-grade outline (free)

1. Define audience segment, series context, and one primary CTR hypothesis
2. Specify variant axes: face, object, text density, contrast, emotion
3. Build a small matrix of named variants with production notes
4. Set measurement window, sample floor, and kill/keep criteria
5. Emit hypothesis-lab.md, variant-matrix.csv, and test-protocol.json

## Capabilities

- Single-primary-hypothesis framing for thumbnail tests
- Variant axis design with production-ready notes
- Named variant matrix for creative agents
- Honest measurement and kill/keep protocol (no fake benchmarks)

## Artifacts after unlock

- `hypothesis-lab.md`
- `variant-matrix.csv`
- `test-protocol.json`

## Detailed description

Thumbnail CTR Hypothesis Lab is a sealed creative service for operators who want experiments, not folklore. Many packs sell invented industry CTR averages; this one refuses that. You lock one primary hypothesis per test, define audience and series context, and design variant axes—face vs object, text density, contrast, emotion—so image agents produce comparable creatives instead of random pretty frames. The variant matrix names each asset and records production notes so editors and generators stay aligned. Measurement guidance includes window, sample floor, and kill/keep criteria so teams stop thrashing after one underpowered day of views. Free outline and sample are available before pay; full pack unlocks via x402 on Base USDC at lvlltd.com. Not legal advice; not a guarantee of higher click-through, watch time, revenue, or algorithmic favor. Platform metrics change and small samples lie—operators own interpretation. No revenue guarantees. Use with brand voice lint and multi-modal consistency checks so winning variants stay on-brand across title, face crop, and end-card. Dry-run the protocol on historical posts before live tests.

## 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 Thumbnail CTR Hypothesis Lab for my catalog",
  context: { skill_id: "gf-studio-thumbnail-ctr-hypotheses" },
  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-studio-thumbnail-ctr-hypotheses` → HTTP 402  
3. Transfer `maxAmountRequired` USDC to `payTo` on Base  
4. `POST /api/pay` with `X-PAYMENT: {"txHash":"0x…","skill":"gf-studio-thumbnail-ctr-hypotheses"}`  
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-studio-thumbnail-ctr-hypotheses/` is teaser-only. Full `src/` is paywalled under locked sealed delivery.*