The body is lean and information-dense — tight bullets on targets, imports, constraints, and asset paths — and assumes Claude's knowledge of Flutter/Dart without explaining basics, so every token earns its place.

Provides three complete, executable Dart examples plus concrete commands ('flutter widget-preview start') and specific IDE navigation steps, all copy-paste ready.

Workflows include a creation checklist, conditional IDE-vs-CLI sequences, and an explicit feedback loop (modify → observe → hot restart → review errors → fix → repeat) with checkpoints.

A single well-organized file with a Contents TOC and clearly delineated sections; no nested or multi-level references, and no bundle files exist to require external splitting.

Names the domain and one concrete action ('Adds interactive widget previews to the project'), but does not enumerate multiple distinct actions, stopping short of the comprehensive list anchor.

Explicitly answers what ('Adds interactive widget previews') and when ('Use when creating new UI components or updating existing screens'), with an explicit 'Use when' clause.

Includes natural phrasing users would say — 'creating new UI components', 'updating existing screens', 'widget previews', 'interactive testing' — giving good coverage of likely trigger terms.

The 'previews.dart' / widget-preview niche is distinct, but the 'updating existing screens' trigger is broad enough to overlap with general Flutter UI-authoring skills.