Choose the trigger at the Outpost
Useful triggers include recovering the target object, reaching a resource threshold, suffering a key loss, or losing route confidence. The trigger must be observable.
'When it feels dangerous' is too vague. By the time every player agrees, the crew may already be separated.

Switch the whole crew to return mode
Once the call is made, stop opening optional rooms and taking avoidable fights. Consolidate the valuable carry and keep the slowest member inside the formation.
If route confidence is low, return to the last confirmed anchor rather than guessing at a new shortcut.
Count the result at home
A successful extraction should answer whether the run objective was met and what Outpost decision the return enables.
If the crew came back with low value but learned a stable layer rule, record it. If it brought value but cannot explain the route, do not advertise that run as a repeatable guide.

Sources
Official GRAIN ROT Steam store page →
