Content
85%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-executed pure-reference skill: dense MV2/MV3 and Firefox/Chrome lookup tables with per-row test implications, a fix-per-anti-pattern table, an honest Limitations section for volatile/out-of-scope material, and an appropriate body-plus-two-references split with clearly signaled one-level-deep navigation. Only minor repetition of the cross-skill pointer and quote material keeps conciseness and actionability at the second-highest anchors.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense reference material where every table row carries a test implication and no space is spent explaining concepts Claude already knows. Minor trim-able redundancy keeps it off the lean anchor: the relationship to `playwright-extension-fixtures` is stated three times (Overview paragraphs 2 and 3, plus References), and the "Two load-bearing quotes" paragraph repeats content already in the lifecycle/listener table rows. Not score 3, since the padding is limited to these instances and everything else earns its place. | 4 / 5 |
Actionability | Concrete throughout: exact field shapes ("{ \"service_worker\": \"sw.js\", \"type\": \"module\"? }"), exact API substitutes ("use chrome.storage.local", "chrome.alarms", "chrome.offscreen.createDocument"), an anti-patterns table with a specific Fix column, and exact URLs to fetch for volatile data. It falls short of the fully copy-paste-ready anchor only because the body itself contains no runnable command (web-ext commands are deferred to references/web-ext-firefox.md) and some shapes are deliberately abbreviated summaries — minor gaps matching the 'mostly executable guidance' anchor. | 4 / 5 |
Workflow Clarity | This is a single-task reference skill with no multi-step process to sequence, and its single action — look up a field or divergence in the summary tables, drill into references/ for exact shapes — is unambiguous. The "When to use" section enumerates the four entry scenarios (author, migrate, triage, review), and the skill is read-only, so the destructive/batch validation cap does not apply. Per the simple-skill guideline, an unambiguous single action warrants the top score. | 5 / 5 |
Progressive Disclosure | Clean two-file split: summary lookup tables live in the body while exact shapes, the full key matrix, and the web-ext CLI each live in a dedicated file; every section explicitly signals where the detail resides ("the exact MV2/MV3 shapes... are in references/manifest-matrix.md", "detailed in references/manifest-matrix.md"). Both referenced files exist, contain the promised content, and point back to SKILL.md rather than chaining to a third level, and the References section consolidates navigation — matching the clear-overview, one-level-deep anchor exactly. | 5 / 5 |
Total | 18 / 20 Passed |