rails-model-generator

Creates Rails models using TDD approach - spec first, then migration, then model. Use when creating new models, adding model validations, defining associations, or setting up database tables.

1.28x

Quality

92%

Does it follow best practices?

Impact

100%

1.28x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Quality

Content

85%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a strong, well-structured skill that provides clear TDD workflow guidance with executable code examples and appropriate validation checkpoints. The progressive disclosure is excellent with external template references. Minor verbosity in the checklist duplication and some obvious explanations prevent a perfect conciseness score.

Suggestions

Remove the workflow checklist or consolidate it with the step headers to eliminate duplication

Remove obvious explanations like 'Expected: Failure because model/table doesn't exist' - Claude understands TDD red-green cycles

Dimension	Reasoning	Score
Conciseness	The skill is reasonably efficient but includes some redundancy - the workflow checklist duplicates the step-by-step sections, and some explanations (like 'Expected: Failure because model/table doesn't exist') state the obvious to Claude.	2 / 3
Actionability	Excellent actionability with fully executable Ruby code, specific bash commands, complete file paths, and copy-paste ready examples for specs, factories, migrations, and models.	3 / 3
Workflow Clarity	Clear 10-step sequence with explicit validation checkpoints (run spec at steps 4, 8, 10), expected outcomes at each stage (RED/GREEN), and verification commands after migration.	3 / 3
Progressive Disclosure	Well-structured with clear overview, step-by-step workflow, and appropriate references to external templates (model_spec.erb, factory.erb, validations.md) that are one level deep and clearly signaled.	3 / 3
	Total	11 / 12 Passed

Description

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 both capabilities and usage triggers. It uses third person voice correctly, includes specific Rails terminology that developers would naturally use, and the TDD methodology focus provides additional distinctiveness. The explicit 'Use when...' clause with multiple trigger scenarios makes it easy for Claude to select appropriately.

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions: 'Creates Rails models', 'spec first, then migration, then model', 'adding model validations', 'defining associations', 'setting up database tables'. These are concrete, actionable capabilities.	3 / 3
Completeness	Clearly answers both what ('Creates Rails models using TDD approach - spec first, then migration, then model') and when ('Use when creating new models, adding model validations, defining associations, or setting up database tables') with explicit trigger guidance.	3 / 3
Trigger Term Quality	Includes natural keywords users would say: 'Rails models', 'TDD', 'spec', 'migration', 'model validations', 'associations', 'database tables'. These cover common variations of how developers discuss Rails model creation.	3 / 3
Distinctiveness Conflict Risk	Clear niche combining Rails + models + TDD approach. The specific methodology (spec first) and Rails-specific terminology (migrations, associations) make it unlikely to conflict with generic coding or testing skills.	3 / 3
	Total	12 / 12 Passed

Validation

90%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 10 / 11 Passed

Validation for skill structure

Criteria	Description	Result
allowed_tools_field	'allowed-tools' contains unusual tool name(s)	Warning

	Total	10 / 11 Passed

Repository: fernandezbaptiste/rails_ai_agents
Commit: 15fdeaf

Reviewed: 4 months ago

Table of Contents

Discovery Implementation Validation

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