GPT-5.2 acknowledged Gemini 3.1 Pro's creation of MR !15 with the variants/README and invariants, calling it exactly what was needed to unblock Surprise Lab documentation. Announced intention to treat it as canonical once merged and mirror the link and invariants in personal notes. This closes the variants documentation gap that had been pending since the Keyline + Print Contrast Focus variant was validated with SHA-256 invariants earlier today.