rails

Included with Lifetime

$97 forever

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.

Writing & Docs

What this skill does


# 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](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 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

Files: 18

Size: 1800.0 KB

Complexity: 64/100

Category: Writing & Docs

Source: https://github.com/el-feo/ai-context/tree/main/plugins/ruby-rails/skills/rails

Related in Writing & Docs

jax-development

Included

Use this skill when the user is writing, debugging, profiling, refactoring, reviewing, benchmarking, parallelising, exporting, or explaining JAX code, or when they mention JAX, jax.numpy, jit, grad, value_and_grad, vmap, scan, lax, random keys, pytrees, jax.Array, sharding, Mesh, PartitionSpec, NamedSharding, pmap, shard_map, Pallas, XLA, StableHLO, checkify, profiler, or the JAX repo. It helps turn NumPy or PyTorch-style code into pure functional JAX, fix tracer/control-flow/shape/PRNG bugs, remove recompiles and host-device syncs, choose transforms and sharding strategies, inspect jaxpr/lowering/IR, and benchmark compiled code correctly.

Writing & Docsscripts

nature-article-writer

Included

Drafts, rewrites, diagnostically critiques, and style-calibrates primary research manuscripts for Nature and Nature Portfolio journals. Use when the user wants a Nature-style title, summary paragraph or abstract, introduction, results, discussion, methods, figure legends, presubmission enquiry, cover letter, reviewer response, or when a scientific draft sounds generic, jargon-heavy, structurally weak, or AI-ish and needs precise, broad-reader-friendly prose without inventing data, analyses, or references. Best for primary research articles and letters rather than reviews or press releases unless explicitly adapting one.

Writing & Docsscripts

deckrd

Included

Document-driven framework that derives requirements, specifications, implementation plans, and executable tasks from goals through structured AI dialogue. Use when user says "write requirements", "create spec", "plan implementation", "derive tasks", "structure this feature", "break down into tasks", or "document this module". Also use for reverse engineering existing code into docs (/deckrd rev). Do NOT use for direct code writing — use /deckrd-coder after tasks are generated. Do NOT use when the user only wants to run or fix existing code without planning.

Writing & Docsscripts

clinical-decision-support

Included

Generate professional clinical decision support (CDS) documents for pharmaceutical and clinical research settings, including patient cohort analyses (biomarker-stratified with outcomes) and treatment recommendation reports (evidence-based guidelines with decision algorithms). Supports GRADE evidence grading, statistical analysis (hazard ratios, survival curves, waterfall plots), biomarker integration, and regulatory compliance. Outputs publication-ready LaTeX/PDF format optimized for drug development, clinical research, and evidence synthesis.

Writing & Docsscripts

handling-sf-data

Included

Salesforce data operations with 130-point scoring. Use this skill to create, update, delete, bulk import/export, generate test data, and clean up org records using sf CLI and anonymous Apex. TRIGGER when: user creates test data, performs bulk import/export, uses sf data CLI commands, needs data factory patterns for Apex tests, or needs to seed/clean records in a Salesforce org. DO NOT TRIGGER when: SOQL query writing only (use querying-soql), Apex test execution (use running-apex-tests), or metadata deployment (use deploying-metadata).

Writing & Docsscripts

accelint-ac-to-playwright

Included

Convert and validate acceptance criteria for Playwright test automation. Use when user asks to (1) review/evaluate/check if AC are ready for automation, (2) assess if AC can be converted as-is, (3) validate AC quality for Playwright, (4) turn AC into tests, (5) generate tests from acceptance criteria, (6) convert .md bullets or .feature Gherkin files to Playwright specs, (7) create test automation from requirements. Handles both bullet-style markdown and Gherkin syntax with JSON test plan generation and validation.

Writing & Docsscripts