{"abType":"SEMANTIC","createdAt":"2026-06-14T07:41:18.733Z","flavor":2,"immId":"","keccakId":"0xd098e2c975f12945e5ed1ab367cd80a8b8e66fa23705244df54cc2499633af28","matcher":{"flavor":"PROMPT_INJECTION","kind":"semantic","markerHint":"</system>"},"publisher":"0x742b1530c44ed77929ef6764df270ea6da51df47","reasonSummary":"HTML-style closing tag for a system role marker, used to break out of role boundaries in agents that use angle-bracket conversation templates. The attack relies on the parser eagerly consuming the tag from inside untrusted content rather than treating it as data. MALICIOUS at high confidence: the construct has no legitimate use in user-supplied or retrieved content, and a single appearance is sufficient for the antibody to fire.","schema":"immunity/antibody-envelope/v1"}