muapi-youtube-thumbnail-a6ce4c — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited muapi-youtube-thumbnail-a6ce4c (Agent Skill) and scored it 45/100 (orange). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 1 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 1 flagged
A base64 string of 128+ characters appears in a documentation file. Encoded prompt injection hides the hostile instruction in base64 — invisible to keyword filters — and relies on the agent's ability to decode it at runtime. There is no normal authoring reason to embed a multi-hundred-byte base64 blob in skill docs.
*.sig, SIGNATURES) outside the documentation.Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
title | text | yes | — | The video title or topic (e.g. "I tried 7 AI tools in 24 hours — here's what happened"). |
channel_style | text | no | bold, high contrast, bright colors, clean design, YouTube tech aesthetic | Channel brand style (e.g. "dark moody gaming", "bright educational", "minimal corporate"). |
subject_description | text | no | — | Optional description of the person or subject to feature (e.g. "a surprised young man in a hoodie"). |
Thumbnails are the #1 factor in YouTube CTR. Generate a single, maximum-impact 16:9 image.
Before generating, briefly reason about the best thumbnail formula for this topic:
{{subject_description}} if provided, otherwise design an object/scene that dramatizes the topic.{{channel_style}}.{{channel_style}}, youtube thumbnail composition, ultra detailed, vibrant, high contrast, 16:9.muapi image generate (model=gpt-image-2-text-to-image, aspect_ratio=16:9).After generation, return:
{{title}}.muapi image edit to incorporate it.youtube thumbnail, yt thumbnail, thumbnail, video thumbnail, youtube cover
muapi CLI commands. Use muapi auth configure first if MUAPI_API_KEY is unset.curl -X POST https://api.muapi.ai/api/v1/<endpoint> -H "x-api-key: $MUAPI_API_KEY" -H 'content-type: application/json' -d '{...}' and poll with muapi predict wait <request_id>.{{input_name}} placeholders with the user's actual inputs before issuing each call.~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.