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.

Install with Tessl CLI

npx tessl i github:ThibautBaissac/rails_ai_agents --skill rails-model-generator

What are skills?

Review — 92%

Does it follow best practices?

Evaluation — 100%

Agent success when using this skill

Validation — 10 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

100%

43%

Add BlogPost Model to Rails Application

TDD workflow and file structure

Criteria

Without context

With context

Requirements first

100%

Spec before model

100%

Factory before migration

100%

Spec location

100%

Factory location

100%

Model location

100%

Frozen string literal - spec

100%

Frozen string literal - factory

100%

Frozen string literal - model

100%

Build subject

100%

Spec section headers

100%

Factory sequences

100%

Factory trait

100%

Model section headers

100%

Requirements template structure

100%

Without context: $0.3602 · 1m 21s · 16 turns · 17 in / 5,071 out tokens

With context: $0.7939 · 2m 16s · 33 turns · 33 in / 8,349 out tokens

100%

Add Product Inventory Model to Rails API

Migration constraints and version

Criteria

Without context

With context

Migration version 8.0

100%

Null constraint on name

100%

Null constraint on sku

100%

Null constraint on numeric fields

100%

Default value on status/enum

100%

Unique index on sku

100%

Additional index

100%

Frozen string literal - migration

100%

Frozen string literal - model

100%

New enum syntax

100%

Model section headers

100%

DB constraint pairing documented

100%

Supplier foreign key null

100%

Without context: $0.1743 · 38s · 9 turns · 10 in / 2,081 out tokens

With context: $0.7009 · 1m 58s · 32 turns · 2,754 in / 7,002 out tokens

100%

14%

Implement Member Model for SaaS Platform

Email validation and enum patterns

Criteria

Without context

With context

Email format constant

100%

Case-insensitive uniqueness

100%

New enum syntax - role

100%

New enum syntax - status

100%

Frozen string literal - model

100%

Frozen string literal - spec

100%

Frozen string literal - factory

100%

Model section headers

100%

Spec section headers

100%

Build subject in spec

100%

Factory email sequence

100%

Design notes - email validation

100%

Without context: $0.3019 · 1m 7s · 15 turns · 15 in / 4,050 out tokens

With context: $0.5743 · 1m 31s · 25 turns · 25 in / 5,554 out tokens

Evaluated: about 5 hours ago
Agent: Claude Code

Table of Contents

Add BlogPost Model to Rails Application Add Product Inventory Model to Rails API Implement Member Model for SaaS Platform

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