A Pill is a bootstrap sequence to launch an Urbit ship for the first time. The event log begins with the bootstrap sequence of a Pill.

A Pill consists of three ordered lists:

• A list of events which are interpreted by Nock to create an Arvo kernel.
• A list of Arvo events to run once the Arvo kernel is created.
• A list of userspace events to run once the Arvo events have been run. Currently, this consists of setting up the Clay file system.