Emergency compaction can now summarize the whole conversation

Compaction means shrinking a conversation by replacing earlier parts with a summary, so it fits in what the model can read at once. When a prompt turns out to be too long, Claude Code compacts on the spot. Normally it keeps the most recent exchanges word for word.

There is now a mode in which it summarizes every exchange and keeps none of them as they were. This mode also turns on the fallback route that compaction uses when its first attempt fails. Before, only a separate setting could turn that route on.