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Plain language, no hype. Output JSON only.',\n messages: [{ role: 'user', content: 'Here are today\\'s trending posts and videos:\\n' + JSON.stringify($json.data).slice(0, 60000) + '\\n\\nPick the 10 best long-form video topics for our channel. For each return: topic (a working video title, specific, outcome or cost focused), keyword (2 to 4 words someone would search), est_searches (your best estimate per month as a number), score (1 to 10 for demand x fit x low competition), tier (one of: $97, $497, Community, DFY, meaning which product the video should point to), why (one sentence). 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