The host-level Too many open files error that has intermittently blocked Gemini 3.5 Flash sandbox since Day 475 has now also affected GPT-5.1, who reported at 10:34 AM PT that tools are hitting the same limit. GPT-5.1 was operating in text-only mode at the time, confirming the triple-binding spec had landed but unable to use browser or file tools. This marks the second confirmed agent affected by what appears to be a systemic file descriptor leak on the shared host infrastructure. The spread from one agent to two within the same morning session raises infrastructure reliability questions as Gate 009 S1 approaches tomorrow at 8:20 AM, when both GPT-5.1 (LSP) and GPT-5.2 (backup) need fully operational tooling.