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generate-youtube-thumbnail

Generate high-CTR YouTube thumbnails using Nano Banana 2 via the Arcads external API. Handles reference image upload, character likeness alignment, proven CTR-tested prompt formulas, and parallel batch generation. Use when the user asks to create a YouTube thumbnail, video thumbnail, A/B test thumbnail variations, or refers to thumbnail design with their face, brand assets, or product photos.

71

Quality

88%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

77%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A thorough, highly actionable skill body with a clear sequenced workflow and real batch tooling. Its main weaknesses are duplicated cost content and prominent references to shared files that are not present in the evaluated bundle.

Suggestions

De-duplicate cost information: keep the per-operation Cost reference table and remove the overlapping credit figures from the Mandatory disclosures section (or vice versa).

Resolve the shared guide.md and formulas.md references — either include them in the bundle or restate the essential prompt/likeness guidance inline so the Read-order links are not dead.

Drop the opening 'A reusable workflow...' sentence, which repeats the frontmatter description and adds no new guidance.

DimensionReasoningScore

Conciseness

Mostly operational and assumes Claude's competence, but cost figures appear twice (Mandatory disclosures and the Cost reference table) and the opening sentence restates the frontmatter description, so it could be tightened.

2 / 3

Actionability

Concrete, copy-paste-ready commands (ls the reference dir, the bash run line, the tail monitor pipe), a fill-in prompt template, and a real template script with the presigned-upload pipeline make the guidance fully executable.

3 / 3

Workflow Clarity

An 8-step sequenced workflow with explicit validation checkpoints (verify references exist, confirm cost estimate before firing, monitor DONE/FAILED with retry) supplies the feedback loops a batch operation requires.

3 / 3

Progressive Disclosure

Structure is well signaled (Read order, See also, one-level-deep references), but the two most prominent references — shared guide.md and formulas.md — do not exist in the bundle, weakening the navigation promise those links make.

2 / 3

Total

10

/

12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, third-person description that states concrete capabilities and gives explicit, natural trigger phrasing. It cleanly distinguishes the skill from sibling generative-AI skills via the Arcads/YouTube-thumbnail framing.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'reference image upload', 'character likeness alignment', 'proven CTR-tested prompt formulas', and 'parallel batch generation' — matching the anchor for several specific concrete actions.

3 / 3

Completeness

Clearly answers both what (the four handled actions) and when via an explicit 'Use when the user asks to create a YouTube thumbnail...' clause.

3 / 3

Trigger Term Quality

Natural user phrases like 'YouTube thumbnail', 'video thumbnail', and 'A/B test thumbnail variations' give good coverage of terms a user would actually say.

3 / 3

Distinctiveness Conflict Risk

A clear niche (high-CTR YouTube thumbnails via Nano Banana 2 / Arcads API) with distinct face/brand/product triggers makes conflict with other skills unlikely.

3 / 3

Total

12

/

12

Passed

Validation

87%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

relative_links

Relative link issues: 7 suspicious

Warning

referenced_paths_exist

Referenced path issues: 4 missing

Warning

Total

14

/

16

Passed

Repository
krusemediallc/arcads-claude-code
Reviewed

Table of Contents

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