Type Alias: ChildProcessResult

ChildProcessResult = ChildProcess & Promise<ExecResult>

What spawn returns: the LIVE ChildProcess handle that is ALSO a Promise<ExecResult> resolving on exit.

This is additive - the object still satisfies Promise<ExecResult>, so every existing await spawn(...) / spawn(...).then(...) caller is unchanged. What is new is that the same value is the live child: callers that want to supervise it can read .pid, call .kill(signal), and listen for exit without a second spawn.

Examples

Await it (unchanged)
const { stdout } = await spawn("git", ["rev-parse", "HEAD"], { stdout: "capture" });

Supervise it
const proc = spawn("bun", ["src/server.ts"]);
const shutdown = () => kill(proc);
const { exitCode } = await proc;