{"version":"2.1.315","anchor":"idle-compaction-precompute-now-requires-one-hour-cache","canonical_anchor":"idle-compaction-precompute-now-requires-one-hour-cache","heading":"Advance compaction while idle now needs the one-hour prompt cache","tier":"notice","area":"Compaction","scope":"individual","heads_up":true,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.315\/e\/idle-compaction-precompute-now-requires-one-hour-cache","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.315","markdown":"### Advance compaction while idle now needs the one-hour prompt cache\n\nClaude Code now only prepares a compacted conversation ahead of time while idle when the prompt cache is the one-hour kind and still warm\n\n**What**\n\nCompaction is how Claude Code shrinks a long conversation by summarizing earlier parts. While you are idle, Claude Code can work out a compacted version ahead of time.\n\nIt now does this only when the prompt cache is the one-hour kind and is still warm, meaning it has not expired yet. The prompt cache keeps recent conversation ready for reuse for a limited time. Before, the decision looked at whether the feature was turned off and how much time had passed.\n\n**Why**\n\nPreparing a compacted conversation in advance now happens only when the cache lasts an hour.\n\n- Area: Compaction\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 3\/5\n- Scope: individual\n- Heads-up: yes"}