json-typed-attributes
Define typed attributes backed by JSON fields in Rails models. Use when models need flexible data storage with type casting, validations, and form integration. Supports integer, decimal, string, text, boolean, date, and array types.
61
71%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/json-typed-attributes/SKILL.mdQuality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a well-crafted skill description that clearly communicates a specific Rails pattern (typed attributes backed by JSON columns), includes an explicit 'Use when' clause with natural trigger terms, and occupies a distinct niche. The enumeration of supported types adds valuable specificity that helps Claude determine when this skill is appropriate.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple concrete actions and capabilities: 'Define typed attributes backed by JSON fields', 'type casting, validations, and form integration', and enumerates supported types (integer, decimal, string, text, boolean, date, array). | 3 / 3 |
Completeness | Clearly answers both 'what' (define typed attributes backed by JSON fields with type casting, validations, form integration) and 'when' (explicitly states 'Use when models need flexible data storage with type casting, validations, and form integration'). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords a Rails developer would use: 'typed attributes', 'JSON fields', 'Rails models', 'type casting', 'validations', 'form integration', and specific type names. These are terms developers would naturally mention when needing this functionality. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive niche: the combination of 'typed attributes', 'JSON fields', and 'Rails models' creates a very specific domain that is unlikely to conflict with other skills. This targets a specific Rails pattern (store_accessor / JSON-backed attributes). | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
42%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The skill is highly actionable with excellent, executable code examples covering all supported types and common use cases. However, it is severely bloated—repeating patterns multiple times, explaining basic Rails concepts Claude already knows, and inlining reference-level content that should be in separate files. The result is a ~300-line document that could be reduced to ~80 lines with proper progressive disclosure.
Suggestions
Cut the content to ~80 lines: keep Setup, Supported Types (as a compact table with one example each), and Complete Example. Move forms, validations, scopes, troubleshooting, and best practices to separate reference files.
Remove explanations of concepts Claude already knows: strong parameters syntax, how validations work, what BigDecimal is, how form helpers work.
Eliminate repeated patterns—constants for validation, array syntax in strong params, and inclusion validations each appear 3+ times across different sections.
Add a verification step after setup (e.g., 'Test in console: `record = Model.new; record.attribute = value; record.attribute` to confirm type casting works') to improve workflow clarity.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely verbose at ~300 lines. Explains basic Rails concepts Claude already knows (strong parameters, validations, form helpers, migrations). The 'When to Use' section, 'Best Practices' section, and 'Troubleshooting' section are largely redundant. The same patterns are repeated multiple times (e.g., constants for validation appear in Complete Example, Common Patterns, and Best Practices). | 1 / 3 |
Actionability | Provides fully executable, copy-paste ready code examples for every type, including migrations, model definitions, form templates, validations, scopes, and strong parameters. The examples are concrete with realistic values and expected outputs. | 3 / 3 |
Workflow Clarity | The setup section provides a clear 3-step sequence (add column, include concern, define attributes), but there are no validation checkpoints. For a skill involving database migrations and JSON column setup, there's no verification step to confirm the column exists or that attributes are working correctly before proceeding. | 2 / 3 |
Progressive Disclosure | Monolithic wall of text with no references to external files. Content that could be split out (complete type reference, form examples, common patterns, troubleshooting) is all inline, making the skill extremely long. No bundle files exist to reference, but the content would benefit greatly from being split across multiple files. | 1 / 3 |
Total | 7 / 12 Passed |
Validation
100%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Repository
- RoleModel/rolemodel-skills
- Commit
72e8136
- Reviewed
Table of Contents
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