CtrlK
BlogDocsLog inGet started
Tessl Logo

imagen

AI image generation skill powered by Google Gemini, enabling seamless visual content creation for UI placeholders, documentation, and design assets.

58

Quality

68%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/AI-Agents-Safe-Coding-Skills-claude/skills/imagen/SKILL.md

The canonical home for this skill is imagen in administrakt0r/AI-Agents-Safe-Coding-Skills

SKILL.md
Quality
Evals
Security

Quality

Content

75%Weight 40%Scale 1-5

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

The body is well-structured and actionable with concrete executable commands and a clear workflow, sitting consistently at the 4-anchor across dimensions. The main gaps are undocumented --size options, light error-recovery guidance, and the referenced generate_image.py script being absent from the bundle.

DimensionReasoningScore

Conciseness

Mostly efficient with concrete commands and concise Requirements/Output sections; minor trimmable padding in the Examples dialogue section and the repeated 'seamless' phrasing, placing it above the 3-anchor but short of fully lean.

4 / 5

Actionability

Provides copy-paste-ready executable commands covering basic usage, custom output path, and --size; a minor gap is that valid --size values and default behavior are undocumented, so it is not fully complete.

4 / 5

Workflow Clarity

The 4-step 'How It Works' sequence is clear and the single action is unambiguous, but error-recovery guidance is limited to 'Failure: Error message with details' with no explicit retry/feedback loop.

4 / 5

Progressive Disclosure

Well-organized into clear sections with one-level-deep, clearly signaled references; however the referenced scripts/generate_image.py is not present in the bundle, a minor structural gap keeping it below 5.

4 / 5

Total

16

/

20

Passed

Description

61%Weight 40%Scale 1-5

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 clearly states the skill's purpose and domain with decent natural trigger terms, but lacks an explicit 'Use when...' trigger clause and leans on the buzzword 'seamless'. Completeness is capped at 3 because trigger guidance is only weakly implied.

Suggestions

Add an explicit 'Use when...' clause, e.g. 'Use when the user asks to generate an image, create a picture, or needs placeholder/illustration assets for UIs or docs.'

Replace the fluff word 'seamless' and broaden trigger terms with natural synonyms users say (picture, photo, illustration, icon, logo).

List one or two more concrete actions (e.g., 'generate, resize, and save images') to lift specificity beyond a single action.

DimensionReasoningScore

Specificity

Names the domain ('AI image generation') and one concrete action ('visual content creation') plus use cases (UI placeholders, documentation, design assets), but 'seamless' is fluff and it lists no further concrete actions, matching the 'domain + 1-2 actions, not comprehensive' anchor.

3 / 5

Completeness

Has a clear 'what' but no explicit 'Use when...' clause; the 'when' is only weakly implied via 'for UI placeholders, documentation, and design assets', so the missing-trigger-guidance cap of 3 applies.

3 / 5

Trigger Term Quality

Includes natural terms a user would say ('image generation', 'visual content', 'design assets', 'UI placeholders'); a few common synonyms are missing (picture, photo, illustration, .png), so it sits above the 3-anchor but below comprehensive 5-anchor.

4 / 5

Distinctiveness Conflict Risk

Targets a clear niche (Gemini-powered image generation) with mostly distinct triggers; only minor overlap risk with other asset/design skills, fitting the 'mostly distinct' anchor.

4 / 5

Total

14

/

20

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

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

referenced_paths_exist

Referenced path issues: 3 missing

Warning

Total

14

/

16

Passed

Repository
administrakt0r/AI-Agents-Safe-Coding-Skills
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.