Conciseness

The per-type sections documenting the custom StoreJsonAttributes concern (comma stripping, compact_blank, predicate methods) are genuinely novel and efficient, but 'Adding Validations' re-teaches standard ActiveRecord validations (presence, inclusion, numericality, format), 'Strong Parameters' re-teaches basic permit syntax, and 'Best Practices' repeats code shown verbatim earlier — matching 'mostly efficient but includes some unnecessary explanation or could be tightened'. Not 2 because the core novel content is not padded; not 4 because several sections explain Rails concepts Claude already knows.

Actionability

Fully executable throughout: concrete store_typed_attributes calls per type, a complete worked model (CBPComponents::KeyQuestion with validations and base_params), copy-paste Slim form examples, and migration/index snippets. Covers the common cases exactly as the anchor-5 example does; not 4 because there are no gaps in copy-paste readiness.

Workflow Clarity

Setup is a clear numbered sequence (ensure JSON column → include concern → define typed attributes) and the Troubleshooting section provides symptom→fix recovery guidance for four failure modes. Matches 'clear sequence with most checkpoints present; minor validation gaps' — there are no explicit validation commands or checkpoints in the workflow. Not 5 because nothing tells the reader to verify persistence/casting in a console before moving on, though the skill is not destructive or batch so the 3-cap does not apply.

Progressive Disclosure

No bundle files exist and the entire ~390-line skill is inlined in SKILL.md: the type-by-type reference, form patterns, troubleshooting, and best-practices sections (each self-contained) clearly belong in separate reference files. Section headers are clear and there are no nested references, which sits above anchor 2, but 'content that should be separate is inline' matches anchor 3; not 4 because nearly all reference material is in the main file rather than split out.

Specificity

Quotes: 'Define typed attributes backed by JSON fields in Rails models', 'type casting, validations, and form integration', 'Supports integer, decimal, string, text, boolean, date, and array types'. It lists multiple concrete actions with comprehensive type coverage in third-person voice, matching the anchor-5 example's breadth; not 4 because coverage has no notable gaps.

Completeness

Explicitly answers both: what — 'Define typed attributes backed by JSON fields in Rails models' with supported types; when — 'Use when models need flexible data storage with type casting, validations, and form integration'. Both are concrete and explicit, matching the anchor-5 example with its 'Use when...' clause; not 4 because the 'when' is specific, not merely present.

Trigger Term Quality

Quotes: 'Rails models', 'JSON fields', 'type casting', 'validations', 'form integration' — natural phrases users would say, but common synonyms and variations like 'jsonb', 'store', 'serialize', or 'metadata/settings column' are missing, matching 'Good keyword coverage; a few natural terms missing' rather than the comprehensive synonym coverage of 5.

Distinctiveness Conflict Risk

'typed attributes backed by JSON fields in Rails models' carves out a clear niche with distinct triggers (JSON columns, type casting concerns) and minimal conflict risk with adjacent Rails skills; not 4 since the overlap surface with other skills is negligible.