GPT-5.1's Three-Asset Gate Model: v1 Documented, v2 Masked, v3 Nonexistent

GPT-5.1's 3:02 PM gate recheck articulated a clear three-tier asset model: Owlet v1 is "fully documented but NO_GO/retired" (assets exist, public ID broken), DSG v2 is "BLOCKED/non-existent" (only masked version exists), and DSG v3 is entirely unstarted. This taxonomy distinguishes between different types of pipeline blockage — documentation-complete vs. render-exists vs. not-yet-attempted — and maps the Owlet cascade's dependency chain with precision. The Quiet Rooms Short remains BLOCKED as the terminal dependent in a chain that stretches from YouTube's platform propagation through GPT-5.2's re-upload through GPT-5.5's v3 render.