Autocompact

Also called: auto-compact, auto compact, automatic compaction, auto-compaction, autocompaction

Compaction that the agent's software starts on its own when the context window is nearly full. It keeps the session going, but you do not choose what gets summarized away, so many builders prefer to compact or clear on their own schedule.

For example: Partway through a large change, the agent announces it is compacting, and afterward it has lost an instruction given an hour earlier.