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Create stunning, animation-rich HTML presentations from scratch or by converting PowerPoint files. Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch. Helps non-designers discover their aesthetic through visual exploration rather than abstract choices.

72

Quality

88%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

77%

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

The body is highly actionable with a clear, well-validated phased workflow, but it is verbose (notably duplicated viewport CSS and inline reference material) and monolithic — it does not use bundle files to progressively disclose the large CSS/HTML/script/reference content. The weakest dimensions are conciseness and progressive_disclosure.

Suggestions

Move the large reusable blocks into bundle files and reference them one level deep — e.g. put the mandatory viewport-fitting CSS in references/viewport-base.css, the HTML architecture template in references/html-template.html, and the python-pptx extractor in scripts/extract_pptx.py — then keep SKILL.md as an overview that points to them.

De-duplicate the viewport CSS: the 'CRITICAL: Viewport Fitting Requirements' block and the breakpoints inside the 'HTML Architecture' template overlap (600px/500px breakpoints appear in both); keep one canonical source and reference it.

Trim inline fluff and reference-only sections (the Effect→Feeling mapping and Animation Patterns Reference) into a references/style-guide.md, and tighten adjectives like 'stunning, animation-rich' that add tokens without adding guidance.

DimensionReasoningScore

Conciseness

The ~1100-line body is mostly efficient but padded: the viewport-fitting CSS block is effectively duplicated (a full mandatory block plus an overlapping block in the HTML architecture section) and large reference material (presets table, animation patterns, effect→feeling mapping) is inline rather than offloaded. It does not hit score 1 because it avoids explaining basics Claude already knows, but it is not the lean score-3 case either.

2 / 3

Actionability

Provides fully executable, copy-paste-ready material — the mandatory viewport CSS, the complete HTML architecture template, and a complete python-pptx extraction script — plus concrete AskUserQuestion option specs. It stays at 3 despite the SlidePresentation JS class being left as `// ... initialization` / `// ... methods` stubs, because the bulk of guidance is concrete and executable.

3 / 3

Workflow Clarity

A clear phased sequence (Phase 0 detect → 1 discovery → 2 style → 3 generate → 4 PPT → 5 delivery) with an explicit validation checkpoint in PPT conversion (Step 4.2 "Does this look correct? Should I proceed?") and checklists (Overflow Prevention Checklist, DO/DON'T, test sizes). Not score 2 because validation/feedback loops are present for the batch extraction step.

3 / 3

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ absent) and the skill is a single monolithic ~1100-line file with large blocks that should be separate (150-line CSS, ~190-line HTML template, ~60-line Python script, preset/animation reference tables) all inline. It avoids score 1 because sections and phases are well-organized, but it lacks the one-level-deep, well-signaled reference files that define score 3.

2 / 3

Total

10

/

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.

The description is strong: it states concrete capabilities, includes an explicit 'Use when' trigger clause with natural user terms, occupies a distinct niche, and uses correct third-person/imperative voice. Minor fluff ('stunning, animation-rich') does not materially weaken it.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — "Create ... HTML presentations from scratch", "converting PowerPoint files", "convert a PPT/PPTX to web", "create slides for a talk/pitch" — matching the score-3 anchor; not score 2 because it goes beyond naming just a domain and a couple of actions.

3 / 3

Completeness

Explicitly answers both what (create/convert HTML presentations) and when via the "Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch" clause, matching the score-3 anchor with explicit triggers.

3 / 3

Trigger Term Quality

Covers natural terms a user would say — "presentation", "PPT/PPTX", "slides", "talk/pitch" — giving good coverage of common variations rather than the sparse single-keyword score-2 case.

3 / 3

Distinctiveness Conflict Risk

Occupies a clear niche (browser-based HTML slide decks / PPT-to-web conversion) with distinct triggers unlikely to fire for unrelated skills; not score 2 because the triggers are specific rather than broadly overlapping.

3 / 3

Total

12

/

12

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

skill_md_line_count

SKILL.md is long (1109 lines); consider splitting into references/ and linking

Warning

Total

15

/

16

Passed

Repository
gooseworks-ai/goose-skills
Reviewed

Table of Contents

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