Content
76%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 lean, highly actionable overview with real one-level-deep references, but the Measure→Verify workflow is name-only with no validation checkpoints, a few snippets contain placeholder bodies, and several inline sections duplicate what the reference files cover. Workflow clarity and the inline/reference split are the main improvement areas.
Suggestions
Expand the 'Systematic approach: Measure → Identify → Prioritize → Implement → Verify' line into short sequenced steps with an explicit verification checkpoint (e.g., re-run the Lighthouse audit after each change and confirm the targeted metric moved before moving on) instead of delegating Verify entirely to perf-lighthouse.
Replace placeholder snippet bodies with runnable ones: give the loadThirdParty function a concrete dynamic script-injection example, show a minimal real critical-CSS pattern, and include imports for the React lazy/Next.js dynamic examples.
Trim the inline 'Bundle Analysis' and 'Code Splitting Patterns' sections to one representative example each and point to references/bundle-optimization.md (and references/image-optimization.md for the image snippet) to reduce duplication between SKILL.md and the bundle files.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense with concrete artifacts — a metrics threshold table, copy-ready HTML/JS/bash snippets, package-size facts, and checklists — with essentially no prose explaining concepts Claude already knows. This matches 'lean and efficient; assumes Claude's competence; every token earns its place' rather than the anchor 4, which requires minor instances of over-explanation to trim, and none are present. | 5 / 5 |
Actionability | Most guidance is executable (image tags with width/height/loading/fetchpriority, preconnect + print-media font loading, defer-until-interaction listeners, bundle analyzer commands, Cache-Control headers), but a few snippets are placeholders rather than runnable: the third-party script has an empty 'function loadThirdParty() { // Load analytics... }' body, critical CSS is '<style> /* critical styles */ </style>', and the React lazy/dynamic snippet omits imports. That is 'mostly executable guidance... with minor gaps', not fully copy-paste ready. | 4 / 5 |
Workflow Clarity | The workflow 'Measure → Identify → Prioritize → Implement → Verify' is stated as a single line, but the body is organized by topic (Quick Wins, Bundle Analysis, Caching) rather than by workflow step, 'Verify' is fully delegated to the perf-lighthouse skill, and no validation checkpoints or feedback loops are described. This matches 'sequence present but checkpoints missing or implicit' — below anchor 4, which requires most checkpoints present. Not a destructive/batch skill, so the cap at 3 is not the binding reason; the implicit checkpoints are. | 3 / 5 |
Progressive Disclosure | The three referenced files (references/core-web-vitals.md, references/bundle-optimization.md, references/image-optimization.md) all exist, are one level deep, and are clearly signaled with one-line descriptions under 'Detailed Examples'. However, the body inlines substantial material that the references expand — Bundle Analysis and Code Splitting Patterns duplicate references/bundle-optimization.md's Analysis Tools and Code Splitting sections, and the image Quick Win duplicates references/image-optimization.md — so placement is good but not fully split, matching 'most content is appropriately placed; minor organization gaps' rather than the fully split anchor-5 structure. | 4 / 5 |
Total | 16 / 20 Passed |