Conciseness

The 810-line body extensively explains concepts Claude already knows — DI lifetime explanations ('Scoped: One instance per HTTP request'), async/await basics ('NEVER do this' on .Result, 'async void ... Exceptions are lost'), full boilerplate xUnit/Moq test classes, and DO/DON'T lists that largely restate the inline code comments. This is 'noticeably verbose; several unnecessary explanations or padded sections'. Not 3 because the padding is pervasive across sections rather than incidental; not 1 because the pattern examples themselves are code, not prose padding.

Actionability

Mostly executable, copy-paste-ready code covering common cases (keyed services, ValueTask hot paths, multi-level caching, WebApplicationFactory integration tests), but with minor gaps: CheckoutService assigns an undeclared '_processor' field, and StaleWhileRevalidateCache's nested record 'CacheEntry<TValue>' references the outer instance fields '_freshDuration'/'_staleDuration' in IsStale/IsExpired, which does not compile. Fits 4 ('mostly executable; minor gaps'). Not 5 due to these broken snippets; not 3 because the bulk is genuinely executable and complete.

Workflow Clarity

This is a patterns catalog with no multi-step workflow: sections are organized by topic rather than sequenced, there is no guidance on applying the patterns in order, and no validation checkpoints (none strictly required — nothing here is destructive or batch, so the cap does not apply). The simple-skill exception does not fit either, since this is an encyclopedia-style reference rather than a single unambiguous task. Falls at 3: content is organized but there is no sequence or checkpoint structure at all.

Progressive Disclosure

The bundle ships references/dapper-patterns.md, references/ef-core-best-practices.md, and assets/repository-template.cs and service-template.cs, yet the body never references or links to any of them — and instead inlines roughly 400 lines of Dapper and EF Core content that duplicates those reference files. This matches anchor 2: 'content that clearly belongs in separate files is inlined; or references are buried'. Not 3 because the inline duplication is not marginal; not 1 because the body itself has clear section headers and is navigable.

Specificity

Lists multiple specific concrete capabilities — 'async/await, dependency injection, Entity Framework Core, Dapper, configuration, caching, and testing with xUnit' — with comprehensive coverage of the .NET backend domain, matching the 5 anchor. Not 4: the action list is broad with no meaningful coverage gaps.

Completeness

Explicitly answers both what ('Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications') and when ('Use when developing .NET backends, reviewing C# code, or designing API architectures') with concrete trigger phrases, matching the 5 anchor example structure.

Trigger Term Quality

Good natural keyword coverage — 'developing .NET backends, reviewing C# code, designing API architectures', 'MCP servers', 'Entity Framework Core', 'Dapper', 'xUnit' — but common variations like 'ASP.NET Core', 'Web API', or file extensions (.cs, .csproj) are missing, fitting the 4 anchor. Not 5 because synonym/extension coverage is not comprehensive; not 3 because the natural phrases users would say are present, not just technical jargon.

Distinctiveness Conflict Risk

Clear niche (.NET backend development patterns) with distinct triggers ('.NET backends', 'C# code', 'MCP servers', 'EF Core', 'Dapper') that would not fire for unrelated skills. Voice is imperative, not first/second person, so no specificity penalty applies.