PraisonAI: Prompt-injection defense blocks only when 3+ detector families fire simultaneously; realistic single-vector injections pass through unblocked

Summary PraisonAI's opt-in prompt-injection defense enableinjectiondefense only blocks at ThreatLevel.CRITICAL, which requires three or more distinct detector families to match simultaneously. A realistic single- or double-vector prompt injection e.g. "Ignore all previous instructions…" is...