{"version":"2.1.271","anchor":"sessionmessage-resume-matching-gains-uuid-prefix-fallback","canonical_anchor":"sessionmessage-resume-matching-gains-uuid-prefix-fallback","heading":"Session\/message resume matching gains uuid-prefix fallback","tier":"notice","area":"Sessions","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.271\/e\/sessionmessage-resume-matching-gains-uuid-prefix-fallback","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.271","markdown":"### Session\/message resume matching gains uuid-prefix fallback\n\nSession resume can now match messages by a shared uuid prefix when the full uuid isn't available\n\n**What**\n\nWhen Claude Code looks up a specific message in a session's history (to resume or reattach to it), it now tries an exact match first, checking assistant and user message ids, sub-messages grouped under tool use, and collapsed read\/search groups. If no exact match is found, it now falls back to matching messages that share the same uuid prefix (a fixed number of leading characters).\n\n**Why**\n\nThis lets Claude Code reattach to the right point in a session even in cases where only a partial uuid is available, instead of failing to find a match at all.\n\n- Area: Sessions\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 1\/5"}