Content
71%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 well-structured, actionable skill body with a clean check/fix workflow and exemplary progressive disclosure through one well-signaled reference file. Its main weakness is redundant teaching of srcset fundamentals Claude already knows (Explain section) plus a verbatim-duplicated intro paragraph, which costs token efficiency.
Suggestions
Cut the "Explain" section or reduce it to one line of non-obvious guidance — Claude already knows how srcset, width/density descriptors, and sizes work, and the reference file covers the browser-selection algorithm in more depth anyway.
Remove or drastically shorten the intro paragraph about the 1600px hero / 4x data / 50-80% bandwidth stats, since it duplicates the "Why It Matters" section of references/rule.md verbatim.
Name a concrete method for generating width variants (e.g., a sharp/ImageMagick command or framework build setting) in the Fix section so the fix workflow is fully executable, and add an explicit post-fix verification step (DevTools network check that the expected candidate loads) instead of only asking to describe one.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The Quick Reference and Check/Fix sections are lean and actionable, but the "Explain" section re-teaches how width descriptors, density descriptors, and the sizes attribute work — concepts Claude already knows — and the opening "Without srcset, every user..." paragraph is duplicated verbatim from references/rule.md. Mostly efficient with some unnecessary explanation, matching anchor 3 rather than 4. | 3 / 5 |
Actionability | The Check section gives four concrete flag criteria with required output ("Report each finding with file path and line number") and the Fix section gives numbered, specific steps (generate 400w/800w/1200w variants, add srcset, add sizes, keep src fallback, add width/height, show corrected HTML). It falls short of anchor 5 only because "Generate multiple width variants" names no tool or command for actually producing the variants. | 4 / 5 |
Workflow Clarity | A clear Check → Fix → Explain → Code Review sequence with concrete per-image steps. Validation is present but only implicitly — "describe how to confirm the fix in DevTools" is framed as an output requirement rather than an explicit verify-after-fix step in the workflow, which is the minor validation gap that keeps it at anchor 4 rather than 5. | 4 / 5 |
Progressive Disclosure | A ~45-line overview with a single, clearly signaled, one-level-deep reference ("For full implementation details, code examples, and framework-specific guidance, see references/rule.md" — verified to exist) whose scope is accurately described. Content is appropriately split between overview and detail file, and the simple-skill exception applies. | 5 / 5 |
Total | 16 / 20 Passed |