Central registry for all tool definitions with typed metadata (id, group, icon, status, component). Contains a comprehensive test file (toolCatalog.test.ts) that validates uniqueness of IDs and coverage against an expected tool list. This pattern is directly reusable to build a plugin-based UI catalog in any TypeScript project.

Tauri command for PDF export with session management, file size limits, and atomic writes. Demonstrates a well-structured Rust command that integrates with the Tauri state pattern, provides progress callbacks, and validates inputs before performing expensive operations. The session isolation and error handling patterns are reusable for any file-processing Tauri command.

Manages lazy loading of tool tabs in the Java Swing version. Uses a slot-based system with single-flight initialization, EDT guarding, and deferred service loading. This pattern is reusable in any Swing application that needs on-demand component loading without blocking the UI.

A React component that provides draggable column resizing with persistent width storage via a key. Supports keyboard interaction and minimum widths. Extracted and reusable in any React application needing adjustable split-pane layouts without external dependencies.

Comprehensive integration test suite for a vault-backed Git service, covering init, status, diff, commit, merge conflict handling, unicode paths, and stale lock recovery. Demonstrates a robust testing pattern for file-level Git operations that can be adapted to any git-based storage layer.