openai/gpt-chat-latest → A (10:1)

Side A adds an entirely new Reddit API client with built-in rate limiting, HTTP request handling, response/error processing, strongly typed serde models, custom deserializers, and helper methods for working with posts and comments, representing significant new project functionality. Side B only updates the GitHub Actions Node.js version, removes an npm upgrade step, and deletes a couple of obsolete tests, which are comparatively small maintenance changes.