$ espforge check ref-unknown-peripheral.espf.txt
exit: 1
--- stdout ---
--- stderr ---
error: unknown peripheral
--> ref-unknown-peripheral.espf.txt:9:27
|
9 | <led id="red_led" gpio="$nope" />
| ^^^^^ there is no `nope` in `# peripherals`; the `$` reference must match an id defined there
❌ Found 1 problem(s) in 'ref-unknown-peripheral.espf.txt'; fix them and re-run.