Conciseness

The body is lean — command-driven workflow steps, compact tables, and code with purposeful comments pinning current-vs-legacy patterns ('Notifier, not the legacy StateNotifier'). Not a 5: the 'When to Use This Skill' section duplicates the frontmatter description almost verbatim, the 'Output Templates' section is generic filler ('Widget code with proper const usage'), and the time-sensitive version pin 'Flutter 3' sits in the intro rather than a deprecated/old-patterns section. Not a 3 because there is no padded conceptual explanation of things Claude already knows.

Actionability

Fully executable guidance throughout: copy-paste-ready Riverpod Notifier/ConsumerWidget code, a before/after anti-pattern example, and concrete commands ('flutter pub get', 'flutter analyze', 'flutter test --coverage', 'flutter run --profile', 'flutter pub upgrade --major-versions'). The troubleshooting table pairs each symptom with a specific recovery command. This matches the anchor for copy-paste-ready code covering common cases.

Workflow Clarity

The Core Workflow is a clearly sequenced 5-step process (Setup → State → Widgets → Test → Optimize) where every step names its verification command and includes an explicit feedback loop — 'If flutter analyze reports issues: fix all lints and warnings before proceeding; re-run until clean', 'If tests fail: ... re-run', 'If jank persists: ... apply const'. This matches the top anchor: sequence, explicit validation, and error-recovery loops.

Progressive Disclosure

The Reference Guide table cleanly splits detail into six one-level-deep bundle files (riverpod-state.md, bloc-state.md, gorouter-navigation.md, widget-patterns.md, project-structure.md, performance.md), each verified present in references/ and paired with an explicit 'Load When' condition. The body keeps only overview-level content plus a single representative example, matching the top anchor for well-signaled, easily navigable structure.

Specificity

The description lists multiple concrete capability areas — "building cross-platform applications with Flutter 3+ and Dart", "widget development, Riverpod/Bloc state management, GoRouter navigation, platform-specific implementations, performance optimization" — mirroring the anchor's comprehensive multi-action coverage. Not a 4 because the action list covers the skill's full scope (build, state, navigation, widgets, performance, platform code) rather than having minor gaps.

Completeness

Explicitly answers both questions: what ("building cross-platform applications with Flutter 3+ and Dart" plus the enumerated capability areas) and when ("Use when building cross-platform applications... Invoke for widget development..."). This matches the anchor requiring both what and when with concrete trigger phrases; a 4 would require the 'when' clause to be less explicit, which it is not.

Trigger Term Quality

Strong natural keywords users would actually say: "Flutter", "Dart", "cross-platform", "widget", "Riverpod", "Bloc", "GoRouter". Not a 5 because common synonyms and file extensions are missing — no "mobile app", "iOS/Android app", or ".dart". Not a 3 because coverage goes well beyond one generic keyword and includes the framework's most-used ecosystem names.

Distinctiveness Conflict Risk

Clear niche (Flutter/Dart mobile development) with distinct framework-specific triggers (Riverpod, Bloc, GoRouter) that would not fire for React Native, web, or backend skills. Minimal conflict risk; the trigger terms are uniquely owned by this domain.