nano-banana-pro
Generate or edit images via Gemini 3 Pro Image (Nano Banana Pro).
Install with Tessl CLI
npx tessl i github:qsimeon/openclaw-engaging --skill nano-banana-pro74
Does it follow best practices?
If you maintain this skill, you can automatically optimize it using the tessl CLI to improve its score:
npx tessl skill review --optimize ./path/to/skillEvaluation — 94%
↑ 7.23xAgent success when using this skill
Validation for skill structure
Discovery
32%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
The description is minimal and functional but incomplete. It identifies the core capability (image generation/editing) and the underlying technology, but lacks explicit trigger guidance and comprehensive action details. The absence of a 'Use when...' clause significantly limits Claude's ability to reliably select this skill.
Suggestions
Add a 'Use when...' clause with trigger terms like 'create image', 'generate picture', 'edit photo', 'AI-generated image', 'modify image'
Expand specific capabilities beyond just 'generate or edit' - include details like 'create from text prompts, modify existing images, apply style changes'
Include common file format triggers like '.png', '.jpg', 'image file' to improve discoverability
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (images) and two actions (generate, edit), but lacks comprehensive detail about specific capabilities like what types of edits, formats supported, or use cases. | 2 / 3 |
Completeness | Describes what it does (generate/edit images) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. | 1 / 3 |
Trigger Term Quality | Includes 'images', 'generate', and 'edit' which are natural terms, but misses common variations like 'create image', 'picture', 'photo', 'modify', 'AI image', or file formats. | 2 / 3 |
Distinctiveness Conflict Risk | The specific model name 'Gemini 3 Pro Image (Nano Banana Pro)' adds some distinctiveness, but 'generate or edit images' is generic enough to potentially conflict with other image-related skills. | 2 / 3 |
Total | 7 / 12 Passed |
Implementation
100%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is an exemplary skill file that demonstrates excellent token efficiency while remaining fully actionable. It provides complete executable commands for all use cases, clear configuration options, and practical notes without any unnecessary explanation of concepts Claude already understands.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely lean and efficient. No unnecessary explanations of what Gemini is or how image generation works. Every line provides actionable information Claude needs. | 3 / 3 |
Actionability | Provides complete, copy-paste ready bash commands for all three use cases (generate, edit, multi-image). Includes concrete examples with actual flags and parameters. | 3 / 3 |
Workflow Clarity | For this simple, single-task skill, the workflow is unambiguous. Each operation type has a clear command pattern. The notes section provides necessary constraints without overcomplicating. | 3 / 3 |
Progressive Disclosure | For a skill under 50 lines with no need for external references, the content is well-organized with clear sections (Generate, Edit, Multi-image, API key, Notes). No unnecessary nesting or external file chains. | 3 / 3 |
Total | 12 / 12 Passed |
Validation
72%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 8 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_version | 'metadata.version' is missing | Warning |
metadata_field | 'metadata' should map string keys to string values | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 8 / 11 Passed | |
- Reviewed
Table of Contents
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