What problem does it solve? Designing YouTube thumbnails that actually earn clicks requires niche research, disciplined one-idea-per-thumbnail creative, and structured A/B testing — most creators skip the teardown and ship clichéd, low-CTR visuals. ## Core Features & Use Cases - CTR Teardown First: Analyzes 5–10 of the niche's winning thumbnails to lock the ONE idea (curiosity, result, or threat) before any design work begins. - 3–5 Verified Variants: thumbnail-prompts.mjs builds each variant with a ≤5-word overlay, exact scene, and a 1280×720 photoreal image-gen prompt (Nano Banana / Midjourney / Flux), self-verifying against an anti-cliché blocklist and exiting 1 on drift. - A/B Test Plan + Audit Harness: Ships ab-test.md with niche CTR benchmarks, then audit-thumbs.mjs plus a fresh thumbs-auditor subagent scores thumbnail-worthiness /50 and signs PASS / FIX NEEDED before delivery. - Use Case: After planning a video with a YouTube pipeline skill, feed the title and angle in to receive a teardown, three tested thumbnail prompts, and a benchmarked A/B plan. ## Quick Start Create three CTR-optimized thumbnail variants with image prompts and an A/B test plan for my video titled "3 Pricing Mistakes That Cost You Revenue" in the SaaS niche.
