Unclear Whether this later compaction is active by default is not stated.
What
Autocompact is when Claude Code automatically summarizes a long conversation to free up room. It can now decline to compact at its usual threshold. This happens when no prompt since the last summary was under a configured size; the conversation then compacts at the threshold of the model's whole context window (the total amount of text the model can hold) instead.
Why
On models with a large context window, compaction may happen later than before.
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Whether this later compaction is active by default is not stated.