Rich is a Python library for rendering rich text, beautiful formatting, and advanced content to the terminal. It provides a Console class as its central abstraction, which manages terminal capabilities (color systems, width, encoding) and renders a composable hierarchy of 'renderables' — objects implementing the __rich_console__ protocol that yield Segment tuples (text, style, control codes). The architecture is a monolithic library with clean internal modularity: the Console orchestrates rendering, Segment is the low-level output primitive, and higher-level renderables (Table, Tree, Markdown, Syntax, Progress, Layout, Live) compose into each other via the protocol. Key entry points are the module-level print/inspect/print_json functions (backed by a global Console singleton), the Console class for explicit control, and CLI modules (python -m rich.syntax, python -m rich.markdown, etc.). The library handles cross-platform terminal differences including Windows legacy console API calls via ctypes, Jupyter notebook HTML rendering, and Unicode width calculations across 21 Unicode versions. External dependencies are minimal: pygments for syntax highlighting and markdown-it-py for Markdown parsing. The codebase demonstrates exceptional craftsmanship in its terminal rendering pipeline, careful handling of edge cases (CJK width, emoji variants, control codes, broken file-like objects), and a well-designed protocol system that enables arbitrary composition of renderables. The Segment-based rendering architecture is both performant and elegant, allowing style application, line splitting, and cell-width calculations to be composed as transformations over segment sequences.
Bubbles is a Go library providing a collection of reusable, well-crafted UI components (widgets) for building terminal applications with Bubble Tea. Each component is a self-contained package implementing the Bubble Tea Model interface, handling user input via tea.Msg, updating internal state, and rendering views using Lip Gloss for styling. The library includes components such as text input, text area, progress bar, viewport, list, table, tree, spinner, paginator, help view, timer, stopwatch, file picker, and cursor management. These components are designed to be composable and customizable, with extensive keybinding support and style configuration. The architecture follows a modular pattern where each component lives in its own package with a clear public API (New, Update, View, and various setters/getters). Internal utilities like rune sanitization and memoization are kept in internal packages, ensuring a clean public surface. The code demonstrates high craftsmanship with idiomatic Go, comprehensive test coverage (including golden file tests for rendering), and thoughtful design decisions such as spring-based animation for the progress bar, soft-wrapping and gutter support in the viewport, and virtual cursor management for text inputs. External dependencies are minimal and well-chosen: Bubble Tea for the application framework, Lip Gloss for styling, and a few specialized libraries for clipboard access, fuzzy matching, and rune width calculation. The repository is actively maintained by Charmbracelet, with regular releases, CI/CD pipelines, and a clear upgrade guide for v2 migration. It is widely used in production applications like Glow and Charm.