Implements a state-machine-based argument parser for the wslc CLI. Supports positional arguments, named flags, aliases, and overridable defaults via `ArgMap`. The parser is self-contained, well-tested, and can be extracted for any CLI tool requiring robust argument handling with validation and help generation.

Implements a custom Plan 9 (9P2000.L) filesystem server for WSL file sharing. Uses a coroutine scheduler (`p9scheduler`) for async I/O with epoll, handles fid management, readdir, xattr, and error propagation. This is a non-trivial, self-contained implementation of a network filesystem protocol that could be reused in any project needing a 9P server.

Provides a clean C++ abstraction over Linux netlink sockets for managing routes, rules, neighbors, and addresses. Encapsulates socket creation, message serialization, and transaction handling with error types (`NetlinkError`, `NetlinkTransactionError`). Reusable in any Linux network management tool without direct netlink syscall manipulation.

A simple, self-contained RAII class that displays an animated progress indicator (spinning dots) on the console. Supports start/stop, completion, and error states. Can be extracted and used in any CLI tool requiring a lightweight progress indicator without external dependencies.

Defines an interface for credential storage with two implementations: `FileCredStorage` (DPAPI-encrypted JSON) and `WinCredStorage` (Windows Credential Manager). Demonstrates the strategy pattern for credential persistence, with thread-safe file locking and retry logic. Reusable in any application needing secure credential storage with multiple backends.