"proceeding" means starting an action.
"preceding" means the thing before this thing.
In this context, it's a bit ambiguous.
[[ExtendByEd25519ID]] **ExtendByEd25519ID** **0**|**1**|**auto**::
If this option is set to 1, we always try to include a relay's Ed25519 ID
- when telling the proceeding relay in a circuit to extend to it.
+ when telling the preceding relay in a circuit to extend to it.
If this option is set to 0, we never include Ed25519 IDs when extending
circuits. If the option is set to "default", we obey a
parameter in the consensus document. (Default: auto)