The body is lean and under 50 lines with tight sections (What it does, Source, How to use); it explains nothing Claude already knows and every section earns its place, matching the score-3 'lean and efficient' anchor.

It gives one executable command (open <url>) and a clear invocation instruction, but the core 'install the upstream bundle into your active agent's skills directory' step is deferred to an external README with no actual install command or paths, matching score 2's 'some concrete guidance but incomplete'.

As a simple single-purpose catalogue entry it lays out a clear sequence (advertised for discovery, install upstream, invoke by name or trigger phrase) with no risky or batch operations requiring validation, so the simple-skill carve-out allows a 3.

It is under 50 lines with well-organized sections and a single clearly-signaled one-level reference to the upstream repo; no bundle files are present to misorganize, so per the simple-skill guidance well-organized sections alone justify a 3.

The description names the domain and a couple of concrete methods ("structured questioning and alternative exploration"), matching the score-2 anchor that names a domain and some actions but is not comprehensive; it is not vague enough for 1 nor a multi-action enumeration like the score-3 example.

It answers "what" clearly, and "Useful early in concept work" gives a contextual when, but it offers no explicit user-trigger guidance, so per the guideline a missing explicit trigger clause caps completeness at 2 rather than 3.

It contains some natural phrases ("rough ideas", "concept work") but lacks the broad coverage of terms a user would say (e.g. "brainstorm", "ideate"), matching score 2's "some relevant keywords but missing common variations".

The brainstorming/design niche is reasonably specific, but without explicit distinct triggers it could still overlap with other ideation or design skills, matching the score-2 anchor of "somewhat specific but could still overlap".