Comment by tizerluo

Two things I would want to know before pointing this at a hot service: (1) the overhead budget — when a probe lands on a hot path, is capture sampled or capped per hit, and what p99 latency delta have you measured under load? (2) failure isolation — if probe evaluation itself throws (weird object shape, getter with side effects, huge captured value to serialize), is it contained so it cannot take down the request it is observing? In-process agents live or die by staying boring under worst-case conditions.