JIT runtime errors now log once per function name via _jit_warned hashtable, then stay quiet for that function. No more silent swallowing (which hid real errors) or per-call flooding (which spammed thousands of lines and blocked the server). VM-level fallbacks (inside JIT-compiled code calling other JIT code) are silent — dedup happens at the hook level. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>