The command that owns the instance, for example app dev.
Command-specific, JSON-serializable details such as URLs and ports.
The project directory the instance runs for.
OptionalkeyDistinguishes instances of the same command in the same directory, for example the app configuration file.
The JSON Lines file the instance appends its output to.
Identifies this run, including when the OS reuses a PID.
Describes a running instance of a long-running command such as
app devortheme dev. It's written to.shopify/dev/<slug>.jsonso agents and other tools can discover the instance.