{"version":"2.1.323","anchor":"detached-tool-results-carry-a-foreign-marker-note","canonical_anchor":"detached-tool-results-carry-a-foreign-marker-note","heading":"Background tool results can carry a warning about foreign markers","tier":"notice","area":"Background Tasks","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323\/e\/detached-tool-results-carry-a-foreign-marker-note","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323","markdown":"### Background tool results can carry a warning about foreign markers\n\nResults from tools running in the background can now start with a warning when they contain a marker that may not be genuine\n\n**Unclear.** It is not stated what the marker is, so it is unclear which results get the warning.\n\n**What**\n\nSome tools run in the background and report back to Claude when they finish. Claude Code now notes whether such a result contains a foreign marker. When it does, the result Claude sees can start with a warning block.\n\n**Why**\n\nThis guards against tool output that contains markers made to look like Claude Code's own.\n\n- Area: Background Tasks\n- Tier: You'll notice\n- Useful: 1\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}