Conciseness

The body is dense with project-specific knowledge Claude cannot infer (mapper naming conventions, part directives, validation helpers, custom test matchers), but the inline comments in the Dart template partially duplicate the 'Key guidelines' list, and Effective Dart doc-comment guidance is stated twice — minor trimming opportunities that keep it below level 5.

Actionability

Guidance is fully executable: a complete annotated Dart model template, exact commands ('dart run build_runner build --delete-conflicting-outputs', 'dart test test/models/content/content_models_test.dart', 'dart analyze lib/src/models/content/'), concrete file paths, a validation helper table, named custom matchers, and copy-paste-ready decodeJsonList/decodeJsonObject usage — matching the level-5 anchor.

Workflow Clarity

The sequence is clear ('Before starting' → conventions → codegen → tests → run tests → analyze) with verification checkpoints (run tests, run analysis), but there is no explicit feedback loop telling Claude what to do when tests or analysis fail (fix and re-run), which the level-5 anchor requires.

Progressive Disclosure

The single file is well-organized with clear section headers, a table, and focused code blocks, and no bundle files exist so nothing is misfiled. However, at ~170 lines, content like the validation-helper table or the page-usage section could live in reference files, and the simple-skill exception (under 50 lines) does not apply — good structure with minor organization gaps, i.e. level 4.

Specificity

The description lists multiple concrete actions — 'Add or update a dart_mappable data model in lib/src/models/content/', 'adding format validation, regenerating code, and adding tests' — covering the full workflow comprehensively; not the level-4 anchor because there is no meaningful gap in action coverage for the skill's core purpose.

Completeness

It explicitly answers both questions: what ('Add or update a dart_mappable data model... including adding format validation, regenerating code, and adding tests') and when ('Use when adding a new content type or modifying an existing model's fields') with concrete trigger phrases, matching the level-5 anchor exactly.

Trigger Term Quality

Natural terms like 'data model', 'content type', and 'model's fields' match what a user would say, but common variations such as 'schema', 'entity', or a generic 'model' phrasing beyond 'data model' are absent, so it falls just short of the comprehensive-synonym coverage of level 5.

Distinctiveness Conflict Risk

The niche is highly specific — dart_mappable models in a named project directory — with distinct triggers ('adding a new content type', 'modifying an existing model's fields') that are unlikely to fire for unrelated skills; clearly the level-5 anchor.