Runtime injection patterns

Two examples are especially useful when evaluating the runtime model.

Deno-style injected runtime

The ArkType workspace simulates a Deno-style entrypoint by overriding:

• argv
• env
• cwd()
• stdout()

That shows you can keep clily's execution model while changing the surrounding runtime assumptions.

Captured stdout and exit interception

The fish runtime example overrides:

• stdout() to collect emitted messages
• exit() to record exit requests instead of terminating
• onExit() to observe the final exit reason

This is the pattern to reach for when you want deterministic integration tests or when a host application needs to remain in control of process shutdown.