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 lean, expert-level operational guide with almost no padding and unusually concrete, hard-to-recall CSS specifics. Its main gaps are the absence of an explicit fix-and-recheck feedback loop in the verify step and reference-shaped content (traps, accessibility checklist) inlined in a single file.
Suggestions
Add an explicit error-recovery loop to §6 Verify, e.g. 'If lint or a browser check fails: fix only what you introduced, then re-run the check before reporting.'
Move the time-sensitive version specifics (Vite 8's default CSS target, Tailwind v4's Safari 16.4 / Chrome 111 / Firefox 128 floors) into a dated reference file so the main skill doesn't silently age.
Split the §3 trap list and §4 accessibility checklist into one-level-deep reference files (e.g. references/traps.md, references/accessibility.md) linked from the overview to slim SKILL.md.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense, rule-first and assumes competence — it never explains what CSS, flexbox or grid are, and packs hard-to-recall specifics ("an `@property` with a relative-unit `initial-value`... is ignored", "100vh is the large viewport and hides content behind the toolbar"). It misses a 5 because time-sensitive version data ("Vite 8's default CSS target", "Tailwind v4 needs Safari 16.4, Chrome 111 and Firefox 128") sits in the main flow rather than a dated/maintained section, and a few clauses could still be trimmed. | 4 / 5 |
Actionability | For an instruction-only skill the guidance is fully executable: concrete properties and values throughout ("`min-width: 0`", "`minmax(0, 1fr)`", "`container-type: inline-size` (not `size`...)"), specific verification parameters ("at about 1440, 768, 375 and 320 px wide, at 200% zoom"), named data sources ("MDN's compatibility tables, webstatus.dev, web.dev's Baseline pages") and concrete commands ("Lint with the project's own Stylelint or Biome from `node_modules`... without fix or write options"). | 5 / 5 |
Workflow Clarity | A clear numbered sequence (Learn the project's CSS → Write the change → Avoid the traps → Accessibility → Adopting newer features → Verify) with a concrete verification checkpoint and a "Say what you didn't verify" rule. It falls short of a 5 because there is no explicit error-recovery loop after lint or browser checks (e.g., fix and re-check before proceeding); the closest is the scope instruction "fix only what you introduced". | 4 / 5 |
Progressive Disclosure | No bundle files exist, and the single SKILL.md is well-sectioned with clear headers and a consistent structure. It scores 4 rather than 5 because the body exceeds the under-50-lines simple-skill case and sections like the trap list (§3) and the accessibility checklist (§4) are self-contained reference material that could be split into one-level-deep reference files to slim the overview. | 4 / 5 |
Total | 17 / 20 Passed |