Conciseness

The body is dense and almost entirely project-specific doctrine (module boundaries, placement rules, test commands, doc names) with no teaching of concepts Claude already knows, but the opening workflow-overview ASCII box duplicates the sequencing detailed in the phase sections below, and the full worked example diagram in Step 2 is long enough that it could be trimmed. This fits 'efficient; minor instances of over-explanation that could be trimmed' better than the padded mid-scale anchors, and is above them because no section explains generic concepts.

Actionability

Guidance is fully executable: real commands ('tuist test Providers', 'xcodebuild test ... -only-testing:ProvidersTests/ClaudeAPITests'), real file paths (Modules/Providers/Resources/Providers/<id>.json, docs/features/<context>/<x>/design.md), concrete type names (ProviderCatalog.detect(), QuotaMonitor, JSONSettingsRepository), a decision table mapping each design question to a specific placement, and exact AskUserQuestion options. It is not the level below because nothing here is pseudocode or high-level hand-waving.

Workflow Clarity

The sequence is explicit and gated: Phase 0 (steps 0, 0b, 1-4) with 'Do NOT proceed to Phase 1 until user explicitly approves', followed by red/green/refactor TDD phases, with validation checkpoints (approval gate, full xcodebuild green, screenshots on mock data, docs updated in the same change) and checklists for both halves. The TDD loop plus the required-green checklist supplies the feedback loop, matching the top anchor rather than the 'minor validation gaps' anchor.

Progressive Disclosure

All five referenced files exist and are substantive one-level-deep references, listed in a References section with descriptive annotations and linked in context with anchors (references/domain-shape.md#seven-questions, references/tdd-patterns.md#naming-tests). Not a 5 because the body inlines a substantial module-placement table, a full worked example diagram, and multiple code samples that could partly live in the existing references, leaving the main file longer than a clear overview.

Specificity

The description names the domain and several concrete actions: 'implementing features in ClaudeBar following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns', plus trigger actions like 'Creating domain models that follow user's mental model', 'Building SwiftUI views that consume domain models directly', and 'Implementing any feature that spans modules (DataSources, Providers, Quotas)'. It sits between anchor 4 and 5: several specific actions with minor gaps — it never mentions the mandatory design-docs-first approval workflow or testing specifics, which keeps it below comprehensive coverage.

Completeness

It explicitly answers both: what ('Guide for implementing features in ClaudeBar following architecture-first design, TDD, rich domain models, and Swift 6.2 patterns') and when ('Use this skill when: (1)…(5)' with five concrete triggers, including directly quoted user questions). This matches the top anchor exactly — clear what AND explicit when with concrete trigger phrases — and clearly exceeds the anchor below where the when clause is present but thinner.

Trigger Term Quality

It includes literal natural phrases a user would say — 'how do I implement X', 'add feature Y' — plus 'Adding new functionality to the app' and 'Creating domain models'. Good, natural coverage rather than jargon, but a few common variations are missing ('new feature', 'extend the app', 'add support for'), so it fits anchor 4 rather than the comprehensive synonym-and-extension coverage of anchor 5.

Distinctiveness Conflict Risk

It is anchored to a specific app and its named modules ('ClaudeBar', 'DataSources, Providers, Quotas', 'SwiftUI', 'Swift 6.2') with triggers scoped to feature implementation. This is a clear niche with distinct triggers and minimal conflict risk with other skills; it is well above the 'minor overlap risk with closely related skills' anchor.