Flashing a lua-track firmware app to real Nabaztag:tag hardware over JTAG, then reading and driving its UART serial console on the Raspberry Pi rig. Use whenever the task involves the Raspberry Pi JTAG rig (jtag.local), openocd, the UART serial console, or verifying a driver/binding against actual hardware rather than the simulator.
Writing or debugging MTL source (.mtl files under mtl/) — the compiler's parsing/typechecking quirks and how to read its error output. Use whenever editing an .mtl file, chasing a "Syntax error"/"Typechecking error"/"is EMPTY"/"?OM Error", or adding a new lib module.