> west manifest

Zephyr-based project?

No, it predates it by a couple of decades.

But our modern embedded firmware projects all use Zephyr and west, so I just created a west manifest, stole parts of the scripts/ folder from the Zephyr repository to have a working "west patch" command and went to town. If I had more time to work on it, I'd have gotten "west build", "west flash" and "west debug" working too (probably with bespoke implementations) and removed the cargo cult shell scripts.

You can use west without Zephyr, it's just that by itself it only provides "west init" and "west update".