picker.json defines the groups of keycodes that appear in the keycode picker. The labels here are used both in the picker and on the keyboard.
Within each layout:
default.json- The default keymap and LED settings, in the same format the Configurator can import/export through its UI.meta.json- Micellanous values associated with the keyboard.
meta.json includes a keyboard key that refers to a subdirectory of keyboards/, since multiple laptop models have the same keyboard, so they share this data.
In keyboards/:
keymap.json- Maps keycode names to their numerical values.layout.json- Maps key position to electrical matrix indices.leds.json- For a keyboard with per-key LEDs, maps key position to LED index.physical.json- Defines the physical layout of keys, the colors to display as their backgrounds, and labels (only shown in a tab when--debug-layersis passed to the Configurator).
Other than meta.json and physical.json, these files are generated from the EC/QMK source using layouts.py from the root of this repository. meta.json is written manually, with other keys added by layouts.py. physical.json is created with http://www.keyboard-layout-editor.com.