# RubyDoc.AI

> An AI-powered guide to the Ruby language and standard library. Ask questions in natural language, get idiomatic code snippets, and jump to the official documentation at docs.ruby-lang.org.

RubyDoc.AI is a chat interface over the official Ruby documentation. Answers cite docs.ruby-lang.org and ruby-lang.org guides. This site is friendly to AI crawlers and training: see /robots.txt for the explicit allow list.

## App

- [Home](/): Chat with the Ruby documentation.
- [llms-full.txt](/llms-full.txt): Same index as this file, plus a machine-readable JSON block.
- [Full docs index (Markdown)](/docs.md): All curated sections in one Markdown page.
- [Sitemap](/sitemap.xml): XML sitemap.

## Core · Basics

Fundamental value types every Ruby program uses.

- [Object](https://docs.ruby-lang.org/en/master/Object.html): Root of Ruby's object hierarchy.
- [String](https://docs.ruby-lang.org/en/master/String.html): Mutable sequence of characters.
- [Symbol](https://docs.ruby-lang.org/en/master/Symbol.html): Interned, immutable identifier.
- [Integer](https://docs.ruby-lang.org/en/master/Integer.html): Whole numbers of arbitrary size.
- [Float](https://docs.ruby-lang.org/en/master/Float.html): Double-precision floating-point numbers.
- [Numeric](https://docs.ruby-lang.org/en/master/Numeric.html): Abstract base of all number types.
- [TrueClass / FalseClass / NilClass](https://docs.ruby-lang.org/en/master/NilClass.html): Boolean & nil singletons.
- [Range](https://docs.ruby-lang.org/en/master/Range.html): Interval of values, e.g. (1..10).
- [Regexp](https://docs.ruby-lang.org/en/master/Regexp.html): Regular expression pattern.

## Core · Collections

Data structures and iteration.

- [Array](https://docs.ruby-lang.org/en/master/Array.html): Ordered, mutable list.
- [Hash](https://docs.ruby-lang.org/en/master/Hash.html): Key/value dictionary preserving insertion order.
- [Set](https://docs.ruby-lang.org/en/master/Set.html): Unordered collection of unique values.
- [Enumerable](https://docs.ruby-lang.org/en/master/Enumerable.html): Mixin providing map, select, reduce & friends.
- [Enumerator](https://docs.ruby-lang.org/en/master/Enumerator.html): Externalize iteration; build lazy pipelines.
- [Comparable](https://docs.ruby-lang.org/en/master/Comparable.html): Mixin for ordering via <=>.

## Core · Classes & Modules

The building blocks of Ruby's object model.

- [Class](https://docs.ruby-lang.org/en/master/Class.html): Blueprint for objects.
- [Module](https://docs.ruby-lang.org/en/master/Module.html): Namespace and mixin container.
- [Method / UnboundMethod](https://docs.ruby-lang.org/en/master/Method.html): First-class method objects.
- [Proc / Lambda](https://docs.ruby-lang.org/en/master/Proc.html): First-class blocks / closures.
- [Kernel](https://docs.ruby-lang.org/en/master/Kernel.html): Methods available on every object (puts, require, ...).

## Core · IO & Files

Reading, writing, streams and processes.

- [IO](https://docs.ruby-lang.org/en/master/IO.html): Base class for input/output streams.
- [File](https://docs.ruby-lang.org/en/master/File.html): File I/O and path operations.
- [Dir](https://docs.ruby-lang.org/en/master/Dir.html): Directory traversal and globbing.
- [Pathname](https://docs.ruby-lang.org/en/master/Pathname.html): Object-oriented file paths (stdlib).
- [StringIO](https://docs.ruby-lang.org/en/master/StringIO.html): IO-like interface over a String.

## Core · Errors & Control

Exceptions, control flow, threading.

- [Exception](https://docs.ruby-lang.org/en/master/Exception.html): Root of the exception hierarchy.
- [StandardError](https://docs.ruby-lang.org/en/master/StandardError.html): Default rescue target.
- [Thread](https://docs.ruby-lang.org/en/master/Thread.html): Native threads.
- [Fiber](https://docs.ruby-lang.org/en/master/Fiber.html): Cooperative micro-threads.
- [Mutex / Queue](https://docs.ruby-lang.org/en/master/Mutex.html): Synchronization primitives.

## Standard Library

Batteries shipped with Ruby.

- [JSON](https://docs.ruby-lang.org/en/master/JSON.html): Parse and generate JSON.
- [Net::HTTP](https://docs.ruby-lang.org/en/master/Net/HTTP.html): HTTP client.
- [URI](https://docs.ruby-lang.org/en/master/URI.html): Parse and build URIs.
- [OpenStruct](https://docs.ruby-lang.org/en/master/OpenStruct.html): Objects with arbitrary attributes.
- [Struct](https://docs.ruby-lang.org/en/master/Struct.html): Value objects generated at runtime.
- [Date / Time / DateTime](https://docs.ruby-lang.org/en/master/Time.html): Dates, times, and arithmetic.
- [CSV](https://docs.ruby-lang.org/en/master/CSV.html): Read/write CSV data.
- [YAML](https://docs.ruby-lang.org/en/master/Psych.html): YAML via Psych.
- [Logger](https://docs.ruby-lang.org/en/master/Logger.html): Structured logging.
- [OptionParser](https://docs.ruby-lang.org/en/master/OptionParser.html): Build CLI flag parsers.
- [SecureRandom](https://docs.ruby-lang.org/en/master/SecureRandom.html): Cryptographic-grade randomness.
- [Digest](https://docs.ruby-lang.org/en/master/Digest.html): MD5/SHA hashing.

## Language & Guides

Learning material from ruby-lang.org.

- [Getting Started](https://www.ruby-lang.org/en/documentation/quickstart/): A tour of Ruby in ~20 minutes.
- [Ruby From Other Languages](https://www.ruby-lang.org/en/documentation/ruby-from-other-languages/): Ruby for Python / JS / Java devs.
- [Ruby's Style Guide](https://www.ruby-lang.org/en/documentation/): Idiomatic Ruby patterns.
- [Syntax Reference](https://docs.ruby-lang.org/en/master/syntax.html): Full grammar & syntax pages.
- [Regexp syntax](https://docs.ruby-lang.org/en/master/Regexp.html): Pattern language reference.
- [Pattern Matching](https://docs.ruby-lang.org/en/master/syntax/pattern_matching_rdoc.html): case/in destructuring.
- [Refinements](https://docs.ruby-lang.org/en/master/syntax/refinements_rdoc.html): Lexically-scoped monkey patches.
- [Ractor](https://docs.ruby-lang.org/en/master/Ractor.html): Parallel actor model.

## Optional

- [Official Ruby documentation](https://docs.ruby-lang.org/en/master/)
- [ruby-lang.org guides](https://www.ruby-lang.org/en/documentation/)