Conciseness

The body is lean with zero padding: no explanation of what Angular signals or DI are, compact templates, terse rules, and a one-line validation command. Every token earns its place and it assumes Claude's competence.

Actionability

Two executable TypeScript templates, concrete rules ("inject() for all dependencies - no constructor DI", "No HTTP calls in stores"), and a runnable validation command ("npx tsc --noEmit") provide mostly executable guidance. It falls short of fully copy-paste ready because the "Data orchestrator" type declared in step 2 has no template or example, and the templates contain placeholder comments ("/* derive from _state */", "// typed logic").

Workflow Clarity

Steps 1–5 are clearly sequenced with an explicit validation checkpoint ("Validate: npx tsc --noEmit"), matching the anchor for clear sequence with most checkpoints present. It lacks a fix-and-retry feedback loop after validation fails, so it does not reach the level-5 anchor.

Progressive Disclosure

This is a short, single-purpose skill with well-organized sections (Steps, Signal Store, Utility Service, Rules) and no bundle files to disclose. Its only reference — "docs/ARCHITECTURE.md section 4.4" — is one level deep and clearly signaled, which qualifies for the top anchor under the simple-skill guideline.

Specificity

"creates injectable with inject() and Angular Signals" names the domain and one to two concrete actions, matching the anchor for domain-plus-limited-actions. It does not list several specific actions (no mention of validation, file placement, or the data-orchestrator type), so it falls below the level-4 anchor.

Completeness

It explicitly answers both parts: what ("creates injectable with inject() and Angular Signals") and when ("Use when adding a signal-based store or utility service"), with third-person voice. The 'what' is thin — it omits the data-orchestrator type and validation covered in the body — so it falls short of the fully comprehensive level-5 anchor.

Trigger Term Quality

Terms like "signal-based store", "utility service", "injectable", "inject()", and "Angular Signals" are natural phrases an Angular developer would say. A few common variations are missing ("service", "DI", "dependency injection", "state management"), so it does not reach comprehensive synonym-level coverage.

Distinctiveness Conflict Risk

"inject()", "Angular Signals", "signal-based store", and "injectable" establish a clear Angular-DI niche with distinct triggers, so conflict risk with other skills is minimal. It is clearly distinguishable, not merely 'mostly distinct'.