Compaction

Also called: compact, compacting, /compact, context compaction, conversation summary, compacted

Shrinking a long session by replacing its history with a summary and carrying on from that summary in a fresh context window. It frees room and restores focus, but details left out of the summary are gone.

For example: After a long debugging session, the founder compacts it. The agent keeps a page of notes on what was tried and continues with a clean slate.