The latest articles on DEV Community by LaunchSignal (@launchsignalai). https://dev.to/launchsignalai https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4098344%2Fce70388d-63b7-4aa5-a077-5c53a1f6ddb5.png https://dev.to/launchsignalai en LaunchSignal Fri, 28 Aug 2026 05:03:12 +0000 https://dev.to/launchsignalai/an-18-hour-half-life-for-mixed-launch-feeds-ii9 https://dev.to/launchsignalai/an-18-hour-half-life-for-mixed-launch-feeds-ii9 <p>Product Hunt, Hacker News, and GitHub do not speak the same language. One is votes in a 24-hour window, one is comments on a Show HN, one is stars on a repo that may have been created last month. I wanted a single public list of what just shipped — not another idea-validation landing page (that is a different product at launchsignal.io).</p> <p>The ranking bet is boring on purpose:</p> <p>heat = score × exp(−hours / 18)</p> <p>Eighteen hours is a guess. Too short and GitHub never shows up. Too long and yesterday's PH winner sits on the homepage all week. Score is source-native: PH's public feed has no vote count I can trust, so every PH row starts at 12; HN is points + 0.4 × comments; GitHub is 2 × stars + forks. Then the same decay hits all three.</p> <p>GitHub Search taught me not to get clever. A long OR query came back 422. The surviving query is short: created recently, plus (ai OR llm OR gpt OR openai OR claude OR gemini). If that source dies, the board still has HN and PH. Recency and heat, nothing else — no classifier.</p> <p>Live list (same payload as JSON): <a href="https://launchsignal.ai/feed" rel="noopener noreferrer">https://launchsignal.ai/feed</a></p> <p>If you have mixed a vote-based feed with a star-based one, what half-life did you keep?</p> webdev showdev productivity opensource