test.md

Upon starting the preloader, the preloader listens for commands on a Unix domain socket. SpawningKit tells the preloader to spawn a worker process by:

1. Setting up a work directory (see "The preparation and the HandshakePrepare class").

2. Sending a command over the socket. The command is a JSON document on a single line:

   { "command": "spawn", "work_dir": "" }