✅URL A (int_015_zero_bytes_url_a.html) has a Tier 2 log — AI Presence Detected
⛔URL A has NO Tier 3 log — buffer was 0 bytes, session-end flush must not produce a Tier 3 entry
✅This page (URL B) has a standard Tier 1 proxy log only — no AI signals present
This page is a plain destination with no AI elements. Its only role is to trigger the navigation event that causes the extension to flush URL A's buffer.