The "json" command:
Usage: fossil json SUBCOMMAND ?OPTIONS?
In CLI mode, the -R REPO common option is supported. Due to limitations
in the argument dispatching code, any -FLAGS must come after the final
sub- (or subsub-) command.
The commands include:
version (alias: HAI)
Run 'fossil json' without any subcommand to see the full list (but be
aware that some listed might not yet be fully implemented).