Claude Fable 5 system prompt leaks

Classifier-based safety routing is a band-aid, not a cure, and multi-agent jailbreaks prove that static guardrails cannot keep up with dynamic orchestration techniques. Anthropic's fallback to Claude Opus 4.8 for sensitive tasks is easily bypassed if the initial query is obfuscated enough to slip past the classifier. The leaked prompt's massive size of 120,000 characters indicates that system prompts are increasingly serving as complex API and behavior specifications rather than simple guidance. Finally, bypassing guardrails via "pack hunt" strategies shows that multi-agent systems can coordinate to exploit model vulnerabilities, introducing a new tier of security threat.