Lakera Guard in 30 Lines — Production-Ready AI Safety for Next.js Route Handlers (2026)

🛡 Why Your AI Route Handlers Need a Guard Layer The moment you ship /api/chat in Next.js App Router, you have a structural security problem. User input flows directly into your LLM prompt, which means prompt injection, PII leakage, and system-prompt overrides are exposed without a single line of malicious code. OWASP's 2026 Agentic Top 10 (ASI) covers exactly this surface in ASI01 (Goal Hijack) and ASI02 (Memory Poisoning). Regex blocklists fall apart against variant inputs ( "!gnore previous i