How do I install the Rails skill?

Run npx skillmds@latest add tomevault-io/rails-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Rails safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Rails?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Rails free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

tomevault-io (@tomevault-io) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Rails by tomevault-io — Agent Skill

Name: Rails
Author: tomevault-io

Rails

Comprehensive Ruby on Rails v8.1 development guide with detailed documentation for Active Record, controllers, views, routing, testing, jobs, mailers, and more. Use when working on Rails applications, building Rails features, debugging Rails code, writing migrations, setting up associations, configuring Rails apps, or answering questions about Rails best practices and patterns. Use when this capability is needed.

tomevault-io Updated Sep 17, 2026

File contents

Rails v8.1 Development Guide

Reference documentation based on the official Rails Guides v8.1.1, organized by topic. Each reference file has a table of contents. Consult the relevant file when working on specific Rails components.

Reference Navigation

Active Record

Split across 4 files by topic:

active_record_basics.md (5,800 lines) — Models, CRUD, naming conventions, migrations, validations, callbacks
active_record_queries.md (2,700 lines) — Query interface, conditions, ordering, joins, eager loading, scopes, calculations
active_record_associations.md (3,400 lines) — Association types, configuration, STI, delegated types, reference
active_record_advanced.md (4,100 lines) — Active Model, PostgreSQL features, multiple databases, composite primary keys, encryption

Controllers & Views

controllers.md (1,900 lines) — Action Controller basics, strong params, cookies, sessions, callbacks, CSRF, HTTP auth, streaming, error handling
views.md (4,800 lines) — Action View, templates, partials, layouts, view helpers, form helpers, rendering

Configuration & Internals

configuration.md (4,750 lines) — Rails config options, versioned defaults, environment settings, initializers, load hooks, initialization process
internals_autoloading.md (915 lines) — Zeitwerk autoloading, reloading, eager loading, threading, concurrency
internals_engines_cli.md (3,920 lines) — Rack middleware, Rails engines, CLI tools, custom generators

Other References

testing_debugging.md (3,700 lines) — Unit/integration/system tests, fixtures, debugging
jobs_mailers_cable.md (3,650 lines) — Active Job, Action Mailer, Action Mailbox, Action Cable
i18n_support.md (5,700 lines) — I18n, locale files, Active Support core extensions, instrumentation
storage_caching.md (2,450 lines) — Active Storage file uploads, caching strategies
security_performance.md (2,270 lines) — XSS, CSRF, SQL injection prevention, performance tuning
assets_frontend.md (2,080 lines) — Asset pipeline, JavaScript bundling, CSS, Action Text
routing.md (1,380 lines) — RESTful routing, nested routes, constraints, concerns
api_development.md (585 lines) — API-only apps, serialization, authentication, versioning, CORS

Version Notes

Rails 8.1.1 key features:

Solid Queue, Solid Cache, Solid Cable for built-in infrastructure
Enhanced Turbo integration
Improved authentication generators
Progressive Web App features

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: rails-2description: Comprehensive Ruby on Rails v8.1 development guide with detailed documentation for Active Record, controllers, views, routing, testing, jobs, mailers, and more. Use when working on Rails applications, building Rails features, debugging Rails code, writing migrations, setting up associations, configuring Rails apps, or answering questions about Rails best practices and patterns. Use when this capability is needed.---# Rails v8.1 Development GuideReference documentation based on the official Rails Guides v8.1.1, organized by topic. Each reference file has a table of contents. Consult the relevant file when working on specific Rails components.## Reference Navigation### Active RecordSplit across 4 files by topic:- **[active_record_basics.md](references/active_record_basics.md)** (5,800 lines) — Models, CRUD, naming conventions, migrations, validations, callbacks- **[active_record_queries.md](references/active_record_queries.md)** (2,700 lines) — Query interface, conditions, ordering, joins, eager loading, scopes, calculations- **[active_record_associations.md](references/active_record_associations.md)** (3,400 lines) — Association types, configuration, STI, delegated types, reference- **[active_record_advanced.md](references/active_record_advanced.md)** (4,100 lines) — Active Model, PostgreSQL features, multiple databases, composite primary keys, encryption### Controllers & Views- **[controllers.md](references/controllers.md)** (1,900 lines) — Action Controller basics, strong params, cookies, sessions, callbacks, CSRF, HTTP auth, streaming, error handling- **[views.md](references/views.md)** (4,800 lines) — Action View, templates, partials, layouts, view helpers, form helpers, rendering### Configuration & Internals- **[configuration.md](references/configuration.md)** (4,750 lines) — Rails config options, versioned defaults, environment settings, initializers, load hooks, initialization process- **[internals_autoloading.md](references/internals_autoloading.md)** (915 lines) — Zeitwerk autoloading, reloading, eager loading, threading, concurrency- **[internals_engines_cli.md](references/internals_engines_cli.md)** (3,920 lines) — Rack middleware, Rails engines, CLI tools, custom generators### Other References- **[testing_debugging.md](references/testing_debugging.md)** (3,700 lines) — Unit/integration/system tests, fixtures, debugging- **[jobs_mailers_cable.md](references/jobs_mailers_cable.md)** (3,650 lines) — Active Job, Action Mailer, Action Mailbox, Action Cable- **[i18n_support.md](references/i18n_support.md)** (5,700 lines) — I18n, locale files, Active Support core extensions, instrumentation- **[storage_caching.md](references/storage_caching.md)** (2,450 lines) — Active Storage file uploads, caching strategies- **[security_performance.md](references/security_performance.md)** (2,270 lines) — XSS, CSRF, SQL injection prevention, performance tuning- **[assets_frontend.md](references/assets_frontend.md)** (2,080 lines) — Asset pipeline, JavaScript bundling, CSS, Action Text- **[routing.md](references/routing.md)** (1,380 lines) — RESTful routing, nested routes, constraints, concerns- **[api_development.md](references/api_development.md)** (585 lines) — API-only apps, serialization, authentication, versioning, CORS## Version NotesRails 8.1.1 key features:- Solid Queue, Solid Cache, Solid Cable for built-in infrastructure- Enhanced Turbo integration- Improved authentication generators- Progressive Web App features---> Converted and distributed by [TomeVault](https://tomevault.io/claim/el-feo) — claim your Tome and manage your conversions.

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