Conciseness

The pattern sections are tight, but ~80 lines teach textbook Microsoft DI knowledge Claude already has: the full Singleton/Scoped/Transient lifetime table and the scoped-captured-in-singleton mistake are standard framework docs material. The Anti-Patterns section also opens with an empty placeholder code block ("// BAD: Massive Program.cs with 200+ lines of registrations") that merely restates The Problem section. Not a 2 because the bulk (extension structure, file organization, naming, layered composition, Akka.Hosting) is genuinely additive, non-obvious project-specific guidance; not a 4 because the lifetime/mistakes sections are more than minor over-explanation.

Actionability

Concrete, copy-paste-ready C# throughout: the full UserServiceCollectionExtensions class, options binding with ValidateOnStart, layered composition, Akka.Hosting WithActors registration, and both scope-creation fixes (IServiceProvider.CreateScope and IServiceScopeFactory). Minor gaps only: several examples end in "// ..." or "{ ... }" ellipses, and the complete testing examples are deferred to a file that doesn't exist (see progressive_disclosure).

Workflow Clarity

As a patterns skill it has no destructive or batch operations, so no validation loop is required; the application sequence is legible — write the extension class (with full template), place it per the file-organization layout and naming table, compose in Program.cs, reuse in tests. Not a 5 because there is no explicit ordered walkthrough for the skill's core use case (refactoring an existing 200-line Program.cs into extensions); the reader must assemble the steps from separate sections.

Progressive Disclosure

Section structure is clear with headers and a well-signaled, one-level-deep pointer to advanced-patterns.md for testing/actor-scope detail — but that file does not exist anywhere in the skill bundle, so "See [advanced-patterns.md](advanced-patterns.md) for complete testing examples" (referenced three times) is a dead end, and the Testing Benefits section's central promise cannot be followed up. Not a 2 because the body is itself well organized and the reference is clearly signaled rather than buried; the failure is the missing target file, not missing structure.

Specificity

"Organize DI registrations using IServiceCollection extension methods" and "Group related services into composable Add* methods for clean Program.cs and reusable configuration in tests" list several concrete actions (organize registrations, group into Add* methods, clean Program.cs, reusable test configuration). Not a 5: coverage has more than minor gaps — the body also covers lifetime management, Akka.Hosting actors, and common mistakes, none of which the description hints at.

Completeness

The "what" is clear (organize DI registrations into composable IServiceCollection extension methods), but there is no "Use when..." clause or equivalent explicit trigger guidance, which caps this dimension at 3. Not a 4 because the "when" is entirely absent rather than merely imprecise; not a 2 because the "what" is concrete and specific.

Trigger Term Quality

Solid natural keywords: "DI registrations", "IServiceCollection", "Add* methods", "Program.cs", "tests" — phrases a .NET developer would actually say. Not a 5: it never spells out "dependency injection" (only the abbreviation "DI") and omits common variations like "ASP.NET Core", "service registration", or "Startup.cs".

Distinctiveness Conflict Risk

Highly .NET-specific terms ("IServiceCollection", "Add* methods", "Program.cs") carve out a clear niche with minimal overlap risk against other skills. Would not naturally trigger for non-.NET dependency injection or generic code-organization needs.