This is a VS Code extension that provides language support for the Crystal programming language. It offers syntax highlighting, code snippets, formatting, hover information showing types, jump-to-definition, problem detection, symbol navigation, macro expansion viewing, and test integration. The extension interacts with the Crystal compiler and shards package manager through CLI tools to provide these features. The architecture is modular with separate TypeScript files handling different concerns (completion, definitions, hover, formatting, tasks, etc.), coordinated through a main extension.ts file. It uses a mutex to prevent concurrent compiler tool usage and properly handles error cases and platform differences.
Collision is a desktop application for generating and verifying cryptographic hashes of files. Built with Crystal, GTK 4, and libadwaita, it provides a clean GUI interface to calculate MD5, SHA-1, SHA-256, SHA-512, Blake3, CRC32, and Adler32 hashes. The application features concurrent hash calculation using Crystal's fiber system, a Nautilus extension for file manager integration, and proper handling of Flatpak sandboxed environments. It follows a modular architecture with separate concerns for UI, core functionality, and application logic.