nano-banana-pro

Generate or edit images via Gemini 3 Pro Image (Nano Banana Pro).

7.23x

Quality

60%

Does it follow best practices?

Impact

94%

7.23x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./skills/nano-banana-pro/SKILL.md

Quality

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 very brief and lacks a 'Use when...' clause, making it incomplete for skill selection purposes. While it names the core capability (image generation/editing) and the specific model, it doesn't provide enough trigger terms or explicit guidance for when Claude should choose this skill over others. The parenthetical alias adds little value for user-facing matching.

Suggestions

Add an explicit 'Use when...' clause, e.g., 'Use when the user asks to create, generate, edit, or modify images, pictures, or photos using AI.'

Include more natural trigger terms users would say: 'create image', 'make a picture', 'photo editing', 'AI-generated image', 'modify image', 'image prompt'.

List more specific capabilities beyond just 'generate or edit', such as style application, text-to-image, image modification, inpainting, or other supported features.

Dimension	Reasoning	Score
Specificity	Names the domain (image generation/editing) and two actions (generate, edit), but doesn't list more specific capabilities like style transfer, inpainting, resizing, format conversion, etc.	2 / 3
Completeness	Describes what it does (generate or edit images) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. Per rubric guidelines, missing 'Use when' caps completeness at 2, and the 'what' is also thin, so this scores a 1.	1 / 3
Trigger Term Quality	Includes 'generate', 'edit', 'images', and the model name 'Gemini 3 Pro Image', but misses common user terms like 'create image', 'picture', 'photo', 'illustration', 'AI image', 'image generation'. The parenthetical 'Nano Banana Pro' is an internal/brand name unlikely to be used by users.	2 / 3
Distinctiveness Conflict Risk	Mentioning the specific model 'Gemini 3 Pro Image (Nano Banana Pro)' adds some distinctiveness, but 'generate or edit images' is broad enough to overlap with other image-related skills. It's somewhat specific but could conflict with other image generation tools.	2 / 3
	Total	7 / 12 Passed

Implementation

87%

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-crafted, concise skill that provides immediately actionable commands for all supported use cases. The structure is clean and efficient, assuming Claude's competence appropriately. The only notable gap is the lack of any error handling or validation guidance (e.g., checking if the API key is set, verifying the output file was created).

Suggestions

Add a brief validation note, e.g., 'If the script exits with an error, check that GEMINI_API_KEY is set and input image paths exist.'

Dimension	Reasoning	Score
Conciseness	Every line serves a purpose. No unnecessary explanations of what Gemini is or how image generation works. The notes section is tight and informative.	3 / 3
Actionability	Provides fully executable bash commands for all three use cases (generate, edit, multi-image). Includes concrete flags, resolution options, and API key configuration paths.	3 / 3
Workflow Clarity	The three use cases are clearly presented with distinct commands, but there's no validation or error handling guidance. For instance, what happens if the API key is missing, if the resolution is invalid, or if the script fails? No feedback loop is mentioned.	2 / 3
Progressive Disclosure	For a simple, single-purpose skill under 50 lines, the content is well-organized with clear sections (Generate, Edit, Multi-image, API key, Notes). The script itself handles complexity, keeping the skill lean.	3 / 3
	Total	11 / 12 Passed

Validation

72%

Warnings & errors only

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

Repository: attilaczudor/Test
Commit: b3cef5f

Reviewed: about 1 month ago

Table of Contents

Discovery Implementation Validation

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