Add OG/Twitter meta image for social sharing

Author: Udit Akhouri

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 <title>ADHD: Parallel Divergent Ideation for Coding Agents</title>
 <meta name="description" content="A preprint introducing ADHD, a parallel divergent ideation method for LLM coding agents. Tree-of-thought with cognitive-frame branching, generator-critic separation, and pruning.">
 <meta property="og:title" content="ADHD: Parallel Divergent Ideation for Coding Agents">
-<meta property="og:description" content="A method that makes coding agents think wide before deep — and the evaluation showing it.">
+<meta property="og:description" content="A method that makes coding agents think wide before deep — and the evaluation showing it. Wins 5/6 against single-shot baseline with +5.17 novelty, +7.67 trap detection.">
 <meta property="og:type" content="article">
+<meta property="og:url" content="https://adhdstack.github.io/">
+<meta property="og:image" content="https://adhdstack.github.io/og.png">
+<meta property="og:image:width" content="1200">
+<meta property="og:image:height" content="630">
+<meta property="og:image:alt" content="ADHD: Parallel Divergent Ideation for Coding Agents — preprint card showing the diverge/focus loop and headline result: 5W/1L vs baseline, +5.17 novelty, +7.67 trap detection.">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="ADHD: Parallel Divergent Ideation for Coding Agents">
+<meta name="twitter:description" content="Stop your agent from picking the first answer. Wins 5/6 against single-shot baseline.">
+<meta name="twitter:image" content="https://adhdstack.github.io/og.png">
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