Conciseness

The body is mostly directive prose with no textbook padding, but the "Gaps in the Specification" section is noticeably wordy — long nested sentences such as the open-questions recording instructions and the multi-clause blocking-question policy could be substantially tightened. It fits anchor 3 (mostly efficient but could be tightened) better than anchor 4 because several passages carry redundant qualification.

Actionability

Concrete guidance throughout: exact folder layout ("Features/UCXXX_<FeatureName>/"), exact marker format with a C# example, specific globs ("docs/**/decisions/*.md"), the "dotnet build" verification command, and a copy-ready next-step quote. It falls just short of anchor 5 because there is no inline example of the .razor page/markup side of the slice (delegated to the single reference) and a few directives remain abstract (e.g. "Map domain entities to ViewModels/DTOs").

Workflow Clarity

An explicit 8-step workflow with a genuine feedback loop — "When it fails, fix the reported error in the slice and build again until it compiles without errors or new warnings" — plus a marker-coverage verification checklist step and clearly ordered read/implement/verify phases. This matches the anchor-5 pattern of clear sequencing, explicit validation, and error-recovery loops.

Progressive Disclosure

There is one clearly-signaled, one-level-deep reference — "[references/example-slice.md](references/example-slice.md) shows a complete command, validator, and handler with their markers" (a real file, verified) — and the body is organized under clear headers. It misses anchor 5 because the lengthy "Gaps in the Specification" section (roughly 40 lines of policy detail) is inlined in SKILL.md where the reference pattern would suit it better.

Specificity

The description lists multiple concrete actions — "generates feature-folder components, C# Commands/Queries with their handlers and validators, EF Core entities/configurations, and Blazor (Razor) pages/components, with UC-XXX BR-YYY markers on every business rule" — giving comprehensive coverage of the skill's outputs. It clearly exceeds anchor 4 because nothing significant is missing from the action list.

Completeness

Both questions are answered explicitly: the "what" ("Takes a UC-XXX.md specification and generates feature-folder components...") and the "when" ("Use when the user asks to 'implement a use case in C#'... or mentions Blazor, Razor, .NET 10"). This matches the anchor-5 example structure of concrete capability list followed by explicit trigger phrases.

Trigger Term Quality

Trigger phrases like "implement a use case in C#", "build a Blazor page", "create a Vertical Slice", and mentions of "Blazor, Razor, .NET 10" are natural and well-chosen. It falls short of anchor 5 because a few natural terms are absent (e.g. ".razor" file extension, "EF Core", "MediatR" as trigger keywords a user might say).

Distinctiveness Conflict Risk

The niche is clear — implementing UC-XXX use-case specifications as C#/Blazor vertical slices — and the triggers are distinctive enough that it is unlikely to fire for unrelated skills. It sits comfortably in a distinct niche with minimal overlap risk.