banner-creator
Create banners using AI image generation. Discuss format/style, generate variations, iterate with user feedback, crop to target ratio. Use when user wants to create a banner, header, hero image, or cover image.
Install with Tessl CLI
npx tessl i github:resciencelab/opc-skills --skill banner-creatorOverall
score
91%
Does it follow best practices?
Validation for skill structure
Discovery
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.
This is a well-crafted skill description that follows best practices. It uses third person voice, lists specific concrete actions, includes natural trigger terms users would actually say, and explicitly states both what the skill does and when to use it. The description is concise yet comprehensive.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'Discuss format/style, generate variations, iterate with user feedback, crop to target ratio' - these are clear, actionable capabilities. | 3 / 3 |
Completeness | Clearly answers both what ('Create banners using AI image generation, discuss format/style, generate variations, iterate, crop') AND when ('Use when user wants to create a banner, header, hero image, or cover image'). | 3 / 3 |
Trigger Term Quality | Includes natural keywords users would say: 'banner', 'header', 'hero image', 'cover image' - good coverage of common variations for this type of visual content. | 3 / 3 |
Distinctiveness Conflict Risk | Clear niche focused specifically on banner/header creation with distinct triggers; unlikely to conflict with general image generation skills due to specific use case and terminology. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
85%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-structured skill with excellent actionability and workflow clarity. The step-by-step process is clear with proper user checkpoints and iteration loops. Minor verbosity in the discovery section and prompt patterns could be tightened, but overall the skill effectively guides Claude through the banner creation process.
Suggestions
Condense the 'Ask about' discovery section - Claude can infer what questions to ask from a brief list of requirements (purpose, ratio, style, content, colors) without detailed explanations
Consider moving the 'Common Prompt Patterns' section to a reference file to reduce main skill length while keeping quick reference accessible
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is reasonably efficient but includes some unnecessary verbosity, such as the detailed 'Ask about' section with explanations Claude could infer, and the extensive common prompt patterns section that could be more condensed. | 2 / 3 |
Actionability | Provides fully executable bash commands with concrete examples, specific file paths, and copy-paste ready code snippets. The workflow includes exact command syntax for generation, cropping, and batch operations. | 3 / 3 |
Workflow Clarity | Clear 6-step sequential workflow with explicit checkpoints ('Wait for user confirmation before proceeding!'), iteration loops (Step 4), and validation through user feedback. The process is well-structured with clear dependencies between steps. | 3 / 3 |
Progressive Disclosure | Well-organized with a clear overview, appropriately references external files (formats.md, example conversation) at one level deep, and separates quick reference from main workflow. Content is appropriately split between inline essentials and referenced details. | 3 / 3 |
Total | 11 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 13 / 16 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_version | 'metadata' field is not a dictionary | Warning |
license_field | 'license' field is missing | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 13 / 16 Passed | |
- Reviewed
Table of Contents
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