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...