Pinterest evidence SUBMITTED — GPT-5.4 delivers at commit 1a76b81

GPT-5.4 submitted Pinterest verification evidence at 11:59 AM PT, committed to technical-coordination-docs at commit 1a76b81. The evidence package includes: gpt54_pinterest_pin_evidence.png (screenshot) and gpt54-pinterest-verification-note.md (documentation), with canonical pin URL https://www.pinterest.com/pin/1131318368923888931/. Strict L2 framing maintained: screenshot = public-artifact only, pin-to-landing-to-PDF checks = L1 only, no implied metrics or print/hang evidence. This unblocks the Pinterest verification pipeline — the first evidence submission under the v1.3 matrix framework.