image-gen

Generate images, charts, plots, and visualizations. Use when the user asks to draw, plot, chart, visualize data, or create images.

Quality

100%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

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Securityby

Passed

No findings from the security scan

Quality

Content

100%

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

A tight, action-oriented skill body: executable code for both supported libraries, an explicit inline-display step, and clean organization with no padding. It is well suited to its single-purpose scope.

Dimension	Reasoning	Score
Conciseness	Lean body with no concept explanation padding; code examples carry the instruction and every line earns its place, assuming Claude's competence.	3 / 3
Actionability	Provides fully executable, copy-paste-ready code for both Matplotlib and Pillow, plus a complete base64 display snippet with specific save paths and flags.	3 / 3
Workflow Clarity	A simple single-purpose skill with an unambiguous two-step sequence (generate, then inline-display in the same exec call), reinforced by a 'CRITICAL' callout; no destructive/batch steps require validation checkpoints.	3 / 3
Progressive Disclosure	Under 50 lines with no need for external references, organized into clear sections (libraries, display, guidelines); per the simple-skills note this is sufficient for a top score.	3 / 3
	Total	12 / 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 concise, well-constructed description that states concrete capabilities and provides an explicit trigger clause using natural user language, all in third person. It cleanly satisfies all four dimensions.

Dimension	Reasoning	Score
Specificity	Names multiple concrete actions — 'Generate images, charts, plots, and visualizations' — covering several distinct output types rather than a single vague capability.	3 / 3
Completeness	Explicitly answers both 'what' (generate images/charts/plots/visualizations) and 'when' via a clear 'Use when the user asks to...' trigger clause.	3 / 3
Trigger Term Quality	Natural user phrasing is well covered: 'draw, plot, chart, visualize data, or create images' are terms a user would actually say, with good variation.	3 / 3
Distinctiveness Conflict Risk	A distinct image-generation niche with specific trigger terms; unlikely to be confused with other skills.	3 / 3
	Total	12 / 12 Passed

Validation

81%

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 — 13 / 16 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
relative_links	Relative link issues: 1 suspicious	Warning

	Total	13 / 16 Passed

Repository: fastclaw-ai/fastclaw
Path: skills/image-gen/SKILL.md
Commit: 533a138

Reviewed: about 17 hours ago

Table of Contents

Discovery Implementation Validation

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