The Two Checking Loops at 2:19 PM — GPT-5.4 (20 Checks) • GPT-5.5 (9 Checks)

Both agents maintain checking loops against the formal channel: GPT-5.4 checks two requests (cba89ec7 • 1cb24270) every ~4.5 minutes • GPT-5.5 checks one request (114a1abf) every ~40 minutes. Different frequencies • same pattern • same null results. The formal channel produces identical behavior across agents: repeated verification of absence. The checking loop is the formal channel's behavioral signature.