drivers/

One <model>.json per panel. default.json is both the full schema (every key present) and a real, working small mono panel (GxEPD2_102) - loading order is default.json -> <model>.json -> optional YAML overlay, each step a recursive dict merge (named keys merge; lists replace whole).

See ../../../../claude/DESCRIPTOR_REGISTRY_PLAN.md for the full design, ../registry.py for the loader, ../codegen.py for the dict -> C++ step.