/usr/lib/swipl/library/mqi.pl
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 mqi_start is semidet
Main entry point for running the Machine Query Interface in "Embedded Mode" and designed to be called from the command line. Embedded Mode is used when launching the Machine Query Interface as an embedded part of another language (e.g. Python). Calling mqi_start/0 from Prolog interactively is not recommended as it depends on Prolog exiting to stop the MQI, instead use mqi_start/1 for interactive use.

To launch embedded mode:

swipl --quiet -g mqi_start -t halt -- --write_connection_values=true

This will start SWI Prolog and invoke the mqi_start/0 predicate and exit the process when that predicate stops. Any command line arguments after the standalone -- will be passed as Options. These are the same Options that mqi_start/1 accepts and are passed to it directly. Some options are expressed differently due to command line limitations, see mqi_start/1 Options for more information.

Any Option values that cause issues during command line parsing (such as spaces) should be passed with "" like this:

swipl --quiet -g mqi_start -t halt -- --write_connection_values=true \
                                      --password="HGJ SOWLWW WNDSJD"

For help on commandline options run

swipl -g mqi_start -- --help