Content
82%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
A highly actionable, well-structured skill body: complete executable templates, an exact tool schema, and clearly sequenced steps with most checkpoints present. The main gaps are minor — some provenance/philosophy prose to trim and content duplicated between the body and the reference files.
Suggestions
Cut the provenance sentences ("Extracted from Claude's actual visualize:read_me guidelines" / "without needing the read_me setup call") — they add no instruction for the reader.
Deduplicate the Chart.js setup and SVG viewBox rules between the body and references: keep one minimal working example in SKILL.md and move the repeated detail (load-order fallback, viewBox checklist) wholly into the reference files.
Add an explicit validation step after rendering (e.g. confirm the widget renders without console errors / re-check the dark-mode mental test) to close the workflow loop on the primary show_widget path.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense with host-specific rules and templates, but contains trimmable non-instructional prose such as the provenance explanation "the actual Anthropic 'Imagine — Visual Creation Suite' design rules, extracted so you can produce high-quality widgets directly without needing the read_me setup call" and soft philosophy copy like "Seamless: Users shouldn't notice where the host UI ends and your widget begins". | 4 / 5 |
Actionability | Fully executable guidance throughout: complete copy-paste Chart.js and SVG templates, exact show_widget JSON with a parameter table, an explicit CDN allowlist, enumerated CSS variables, and per-format rules ("viewBox 0 0 680 H", "height ONLY on the wrapper div"). | 5 / 5 |
Workflow Clarity | Steps 1–7 are clearly sequenced with useful checkpoints (host-tool detection with "do not invent a show_widget call", dark-mode mental test, `if (window.Chart) initChart();` fallback, "Verify the saved output in a browser when available"), but the primary show_widget render path lacks an explicit post-render validation loop. | 4 / 5 |
Progressive Disclosure | Three real one-level-deep reference files, each with a one-line purpose and a clear "Read the relevant reference file when you need…" pointer, but there is notable duplication between the body and the references — the Chart.js setup pattern appears in Step 4 and again in chart_js.md, and the viewBox/safe-area rules appear in Step 5 and again in svg_and_diagrams.md. | 4 / 5 |
Total | 17 / 20 Passed |