Vercel Turns On Always-On Tracing for Production and Preview Traffic
Vercel·low signal
Vercel shipped always-on tracing that continuously collects traces from production and preview traffic, so real user requests can be debugged without reproducing them, alongside custom metrics emitted from Vercel Functions via a metric() helper in @vercel/functions. Removing the reproduce-it-first step is the practical win for anyone debugging nondeterministic AI-generated code paths. Both landed in the same changelog window.