Conciseness

The body is dense and instructional with no concept-explanation padding, but a few tokens could be trimmed: the "EF Core DbContext with Async Query" example duplicates the projection pattern already shown in the MediatR handler (AsNoTracking/Select/ToListAsync), "Use .NET 8 and C# 12 features" restates the skill's title, and the maintainer footer is non-instructional. This fits anchor 4 (efficient, minor trimmable instances) rather than 5 (every token earns its place).

Actionability

Fully executable guidance throughout: concrete commands ("run `dotnet build` to verify compilation", "run `dotnet test`", "verify endpoints with `curl`"), precise settings ("`<Nullable>enable</Nullable>` in the `.csproj`", "`WebApplicationFactory<Program>`"), and four complete, syntactically valid C# 12 code blocks annotated with file paths that are mutually consistent (UserDto defined, handler wired to the endpoint). This matches anchor 5 (copy-paste ready, covers the common cases).

Workflow Clarity

The five-step Core Workflow has explicit validation checkpoints with feedback loops for error recovery — "if build fails, review errors, fix issues, and rebuild before proceeding" and "if tests fail, diagnose failures, fix the implementation, and re-run before continuing" — reinforced by MUST DO / MUST NOT checklists. This matches anchor 5 (explicit validation steps, error-recovery loops, checklists); the destructive/batch cap does not apply since validation is present.

Progressive Disclosure

A clear overview with a well-signaled reference table giving each file's topic and a "Load When" condition (e.g., "Minimal APIs | references/minimal-apis.md | Creating endpoints, routing, middleware"). All five referenced files exist in references/, none chain to further reference files (verified one level deep), and ~2,300 lines of detail are appropriately kept out of SKILL.md. Matches anchor 5.

Specificity

The description enumerates concrete, specific technologies ("minimal APIs, clean architecture, or cloud-native microservices. Invoke for Entity Framework Core, CQRS with MediatR, JWT authentication, AOT compilation") with broad domain coverage, but these are technology nouns rather than capability verbs — it never states what the skill does, only what topics it covers. This matches anchor 4 (several specific items, minor gaps) rather than 5 (comprehensive concrete actions).

Completeness

"When" is explicit and detailed ("Use when building .NET 8 applications... Invoke for Entity Framework Core, CQRS with MediatR..."), but the "what" is entirely absent — no capability statement of what the skill does (e.g., "Implements high-performance services with..."). This directly matches anchor 2 ("only 'when' is present without 'what'"), and does not fit anchor 3, which requires a clear 'what' with a weak 'when' — the inverse profile.

Trigger Term Quality

Includes many natural terms a .NET developer would actually say — ".NET 8", "minimal APIs", "Entity Framework Core", "CQRS", "MediatR", "JWT authentication" — giving good keyword coverage. It falls short of anchor 5 because common variations and synonyms are missing ("C#", "C# 12", "ASP.NET Core", ".NET Core", the "EF Core" abbreviation).

Distinctiveness Conflict Risk

The technology-specific triggers (.NET 8, Entity Framework Core, MediatR, minimal API) anchor a clear niche, but broader pattern terms — "clean architecture", "cloud-native microservices", "JWT authentication" — carry minor overlap risk with closely related architecture, microservices, and security skills. This fits anchor 4 (mostly distinct, minor overlap risk) rather than 5 (minimal conflict risk).