Licence texts shown in Kestrel's About box (licences_list command).

Naming: <Component>__<SPDX-id>.txt, e.g. Selawik__OFL-1.1.txt. Underscores in <Component> display as spaces.
Font licences are added from fonts/ by the fonts agent/integrator into resources/fonts-licences/ (bundled as
"fonts-licences/"); the command lists both directories.
