Zig's Io Interface Lets You Plug Any I/O Backend and Parallelize Tasks
Zig now requires the caller to supply an Io implementation, letting you inject custom storage, network stacks, or mock objects. The interface also exposes async primitives, so code that declares concurrency can be run in parallel automatically. This opens Zig to finer‑grained testing, sandboxing, and high‑performance event loops.