WASHINGTON — A White House state dinner for Estonia derailed when Y Combinator co-founder Paul Graham arrived in cargo shorts, flip-flops, and a stained GitHub shirt. He called it a “fundamental disruption of archaic formal wear protocols.” He bypassed coat check, entered during the toast, and flip-flopped across the East Room marble. Secret Service looked baffled. “We have a Code Khaki in the East Room,” whispered social secretary Maria Gonzalez. Graham pitched throughout the salmon course, gesturing with a plastic fork. He told agents formal wear was “legacy fashion not properly optimized,” and adjusted pockets stuffed with energy bars and USB cables. “Black tie is a massive inefficiency in the social interaction stack,” said Estonian Trade Minister Kristjan Järvan, quoting him. Graham explained his “essential founder tools,” offered emergency protein powder, then stood at dessert to pitch “disrupting diplomatic protocol through casual wear adoption.” The State Department now weighs “formal wear guardrails.” “Flip-flops aren’t appropriate diplomatic footwear, breathability aside,” said Press Secretary Jennifer Morrison. Graham, reached in Palo Alto, stayed defiant. Estonia requested a “formal wear compatibility test.” The Secret Service seized the shorts for a “security pocket audit.”