Core utilities - zero dependency base library for JDK 25+

OpenCode Base YAML processing component with SPI support

High-performance deep clone library with reflection/serialization/unsafe strategies for JDK 25+

Date and time utilities - zero dependency date library for JDK 25+

OAuth 2.0 / OIDC client library - Authorization Code, Client Credentials, Device Code, PKCE support for JDK 25+

OpenCode Base Captcha - Zero-dependency CAPTCHA generation library with multiple types support

ClassLoader component for class loading, scanning, resource management and metadata reading for JDK 25+

Collections component providing modern collection utilities, specialized collections (BiMap, Multiset, Multimap, Table), immutable collections, and primitive collections for JDK 25+

Flexible configuration management library with multiple sources, type conversion, hot reload, and JDK 25+ features for Java applications

Cron expression parsing, building, validation, scheduling, and human-readable description for JDK 25+

Lightweight CSV processing component based on RFC 4180