D018 - Traces are binary, sequence-numbered, and call-site attributed

decided · 2026-08-19

Text logging does not survive emulator call volume. Every event carries a global monotonic sequence number (so a multi-threaded trace can be totally ordered after the fact) and the guest return address (because "which call site" is the useful question - the same stub called from two places is usually two different bugs). Recording must not allocate.