Content
72%Reviews 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 good progressive disclosure, held back by some redundant explanation of known facts and the absence of an explicit verification checkpoint in the workflow.
Suggestions
Trim the introductory motivation paragraph and the 'Explain' compression/browser-support facts that Claude already knows, or move them into references/rule.md.
Add an explicit validation step to the Fix workflow, e.g. 'Confirm in DevTools that the <picture> serves AVIF/WebP and the <img> fallback still loads'.
Relocate version-specific support data ('as of 2024', 'Chrome 85+, Firefox 93+, Safari 16.4+') to a reference or a clearly marked section so time-sensitive content does not inflate the body.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is mostly efficient and well-structured, but the opening motivation paragraph and the 'Explain' section restate compression facts Claude already knows, and inline time-sensitive versions ('as of 2024', 'Safari 16.4+') are not isolated in a deprecated section. | 2 / 3 |
Actionability | The Check and Fix sections give concrete, executable guidance with named tools (Squoosh/Sharp), specific quality values (80%/60%), and copy-paste markup patterns such as '<source type="image/avif">' and an '@supports (background-image: url(".webp"))' query. | 3 / 3 |
Workflow Clarity | Check and Fix are clearly numbered and sequenced, but there is no explicit validation checkpoint (e.g., verify the <picture> fallback renders or confirm WebP is served in DevTools) within the workflow, so checkpoints are implicit. | 2 / 3 |
Progressive Disclosure | The body is a well-organized overview split into labeled sections that points to a real, one-level-deep 'references/rule.md' for full implementation details, matching the clear-overview-with-signaled-reference anchor. | 3 / 3 |
Total | 10 / 12 Passed |