{"version":"2.1.287","anchor":"cache-keepalive-eligibility-adds-an-age-cap","canonical_anchor":"cache-keepalive-eligibility-adds-an-age-cap","heading":"Prompt cache warming can lapse past a limit","tier":"internal","area":"Elsewhere","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.287\/e\/cache-keepalive-eligibility-adds-an-age-cap","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.287","markdown":"### Prompt cache warming can lapse past a limit\n\nClaude Code's check for keeping the prompt cache warm now also treats the cache as lapsed when a further value goes past a limit\n\n**Unclear.** What the added value measures and what the limit is were not stated.\n\n**What**\n\nThe prompt cache keeps recent conversation content stored so later requests can reuse it. Claude Code checks whether it is still worth keeping that cache warm. Before, the cache counted as lapsed only when it was already cold. It now also counts as lapsed when a further value, apparently an age or a size, goes past a limit.\n\n**Why**\n\nThis changes when Claude Code stops trying to keep the prompt cache warm.\n\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 2\/5"}