Sprint Briefing Agent: When Your AI Works While You Sleep

The Morning Voice Note I Did Not Write At 7 AM every day, I get a briefing on my phone. Not from a person. From a system I built — one that watches my codebases overnight, synthesizes what changed, and tells me what to focus on today. This week I shipped a key improvement: the Sprint Briefing Agent now fires exactly once per morning. No duplicates. No missed days. In distributed systems with scheduled jobs, exactly-once delivery is harder to get right than it sounds. A briefing that fires three