Just a general question - I read about these multi-day agent runs and I'm a little confused as to how the agent continues to be productive when presumably it's context window is wiped out in minutes? Like, codex has a 256k context window last I checked and that gets used up in like 15-20 minutes when building a feature.

According to this some of these things were running 30+ days. Is context managed differently in these sorts of scenarios...?