S4A known directories
the IDE has grown organically over the years and many things are not documented. I thought something useful might be the (current) set of directories used by S4A 4.9.2 (note, these things change often) In ~/Library/Application Support/SwiftForArduino... Boards - a supplementary boards.yaml file and related images, allowing you to add board definitions, which will be detected if their USB VID/PID match Builds - dynamically created/destroyed folders that contain the files built from source code, created on demand and deleted when you close the project, there is an advanced setting to keep contents Extensions/Build - the location for build plugins used by the board definitions, e.g. 0-series atmega chip build plugins Extensions/Upload - the location for upload plugins used by the board definitions, e.g. 0-series atmega chip upload plugins Extensions/Modules - added into the swift compile and clang compile paths, you can put built modules in here for import into your code Libraries - auto