dynamic-nested-attributes
Implement Rails nested attributes with dynamic add/remove functionality using Turbo Streams and Simple Form. Use when building forms where users need to manage multiple child records (has_many associations), add/remove nested items without page refresh, or create bulk records inline.
68
82%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Quality
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 an excellent skill description that clearly defines a specific Rails development pattern, includes natural trigger terms that developers would use, and provides explicit 'Use when' guidance with multiple trigger scenarios. The description is concise yet comprehensive, covering the technology stack (Turbo Streams, Simple Form), the pattern (nested attributes, has_many), and the user-facing behavior (add/remove without page refresh).
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions: 'implement Rails nested attributes', 'dynamic add/remove functionality', 'Turbo Streams and Simple Form', 'manage multiple child records', 'add/remove nested items without page refresh', 'create bulk records inline'. | 3 / 3 |
Completeness | Clearly answers both 'what' (implement Rails nested attributes with dynamic add/remove using Turbo Streams and Simple Form) and 'when' (explicit 'Use when' clause covering managing child records, add/remove nested items without page refresh, or creating bulk records inline). | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'nested attributes', 'Turbo Streams', 'Simple Form', 'has_many associations', 'nested items', 'add/remove', 'bulk records inline', 'without page refresh'. These cover the natural vocabulary of Rails developers working on this pattern. | 3 / 3 |
Distinctiveness Conflict Risk | Highly specific niche combining Rails nested attributes + Turbo Streams + Simple Form + dynamic add/remove. This is a very distinct pattern unlikely to conflict with general Rails form skills or other web development skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
64%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a solid, actionable skill with concrete, executable examples covering all components of the Rails nested attributes pattern. Its main weaknesses are the lack of validation/debugging checkpoints in the workflow (e.g., how to verify Turbo Stream responses work, common pitfalls) and some redundancy in the overview/when-to-use sections. The content would benefit from being split across bundle files given its length and complexity.
Suggestions
Add validation checkpoints after key steps, e.g., 'Verify the Turbo Stream response renders correctly by checking the browser's network tab for a 200 response with Content-Type: text/vnd.turbo-stream.html' and common debugging steps for when nested attributes aren't saving.
Remove or significantly trim the 'When to Use' section since it restates the skill description, and remove 'Related Patterns' unless linking to actual skill files.
Extract the Stimulus controller and strong parameters examples into bundle reference files (e.g., STIMULUS_CONTROLLER.md, PARAMS_EXAMPLE.md) and reference them from the main skill to improve progressive disclosure.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill includes some unnecessary sections like 'When to Use' (which restates the description) and 'Related Patterns' (vague references without actionable links). The 'Overview' section also repeats the description. However, the core implementation sections are reasonably efficient with concrete examples. | 2 / 3 |
Actionability | The skill provides fully executable code examples across all six key components — model setup, Slim templates, Ruby controller actions, Turbo Stream responses, Stimulus JavaScript controllers, routes, and strong parameters. Each piece is copy-paste ready and specific enough to implement directly. | 3 / 3 |
Workflow Clarity | The six numbered key components provide a clear sequence, and the implementation checklist is helpful. However, there are no validation checkpoints — no guidance on verifying that Turbo Stream responses render correctly, that nested attributes are properly permitted, or how to debug common failures like incorrect index tracking or missing _destroy fields. | 2 / 3 |
Progressive Disclosure | The content is well-structured with clear headers and sections, but it's a monolithic file with no references to supporting files. The Stimulus controller, routes, and strong parameters sections could be split into separate reference files. For a skill of this length (~130 lines of content), some progressive disclosure into bundle files would improve navigability. | 2 / 3 |
Total | 9 / 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
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