PM at a F500 retailer, team of nine engineers across two squads. Six months ago I stopped writing traditional PRDs. Instead I write a one-page problem brief, then sit with Claude and produce three implementation sketches with rough acceptance criteria. Engineers pick one or argue for a fourth. Cycle time from idea to first PR dropped from about 11 days to 4. The problem: my tech leads hate it. Their complaint is fair. The sketches look credible enough that mid-level engineers stop pushing back on architecture. Two of my last four features shipped with data models that a senior would have rejected in a 30-minute review. We caught both in staging, but the rework ate the time savings. My current rule is that anything touching the customer table or the orders service gets a human-authored design doc, no exceptions. Everything else gets the sketch treatment. It feels like I'm running two product processes in parallel and the seam is where bugs live. Curious if other PMs have landed on a cleaner split.