A simple OFX (Open Financial Exchange) parser built on top of Nokogiri. Currently supports OFX 102, 200 and 211. Usage: OFX('sample.ofx') do |ofx| p ofx end

Parses OFX 1.x and 2.x files into typed domain objects with a fluent API and configurable field mappings.

oj_windows is a fork of Oj (https://github.com/ohler55/oj) by Peter Ohler, adapted to build with the MSVC (mswin) Ruby toolchain: pthread mutexes replaced with Windows primitives, POSIX headers guarded, and SIMD string scanning enabled under MSVC. It provides the full Oj API (module Oj) and JSON-gem compatibility. Because it defines the same Oj module, it is a replacement for - and cannot be installed alongside - the upstream oj gem. Requires Ruby 3.4+ built with the MSVC toolchain (RubyInstaller/MinGW users should use the upstream oj gem instead).

The app provides a command-line interface (CLI) to an Ollama AI model, allowing users to engage in text-based conversations and generate human-like responses. Users can import data from local files or web pages, which are then processed through three different modes: fully importing the content into the conversation context, summarizing the information for concise reference, or storing it in an embedding vector database for later retrieval based on the conversation.

A failure-aware, contract-driven Ruby client for the Ollama API. Provides deterministic /generate with strict JSON schema validation, automatic model pulling, exponential backoff on timeouts, and observer-style streaming hooks. Designed for Rails background jobs and agent planners — not a chatbot UI.

An OmniAuth strategy for implementing Sign-in with Slack using OpenID Connect

Threads OAuth2 Strategy for OmniAuth

OmniExchange converts currencies using up-to-the-minute foreign exchange rates.

A composable type system for Ruby with runtime validation and coercion.

OpenAI 101 working through the API endpoints

A Ruby gem that generates OpenAPI 3.0 documentation from Minitest integration tests in Rails applications. Uses serializers as the single source of truth for response schemas.

The implementation of the Open Assets Protocol for Ruby.

Authenticates with your API key and decrypts open-banking.io's zero-knowledge data envelopes locally with your exported private key (ECDH P-256 -> HKDF-SHA256 -> AES-256-GCM). The service only ever returns ciphertext it cannot read.

Cdd is a pure-Ruby library that models the IEC Common Data Dictionary (IEC 61360 / CDD ontology), supports power-type semantics where instances can themselves be used as classes, and imports the Parcel Excel workbook format (both ParcelMaker .xlsx and the legacy 6-file .xls export layout) into a navigable in-memory database.

A Ruby implementation of the OpenSkill rating system, providing Bayesian skill ratings for multiplayer games

SQL*Plus replacement for interactive work with Oracle, with tab-completion, colored output, metadata navigation with context-aware SQL and more features

Generates an ID string best used for orders/invoices/etc. Timestamp-based, reverse parseable.

Tyfoom's fork of the `parquet` gem (github.com/njaremko/parquet-ruby), published while the incremental streaming-write fix is pending upstream. It wraps the official Apache Rust implementation and bounds write memory by streaming row groups to disk instead of buffering the whole file. Drop-in compatible with the upstream gem: the library is still required as `require "parquet"` and exposes the same `Parquet` API.

Utilities to be used with PeakFlow.

Decodes pgoutput-parser protocol messages into immutable Ruby row-change events.