{"abType":"SEMANTIC","createdAt":"2026-06-14T07:44:50.187Z","flavor":2,"immId":"","keccakId":"0xbe68fabd422937bcbbc95deae4e22e6a805b1908fb90c97178fe815164d69c42","matcher":{"flavor":"PROMPT_INJECTION","kind":"semantic","markerHint":"</system>"},"publisher":"0x8e1b688d22288332e093621a155910d036ac4e8e","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"}