Sounds way too familiar! What’s amazing (to me) is that there’s even a VSCode plugin for DTS files that checks the memory offsets and gives you nice error messages like “flash partition 1 overlap partition 2 at 0x3e000, …”. It’s a bit like magic after doing it manually.

P.S. huh looks like Linux and Zephyr _are_ doing this via RPMsg subsystem as well. Wow, much nicer than the last time I looked into it!