We describe Veil, A small logging shim that strips secrets from tool-call traces at the moment of serialization, not at post-processing.. Agent frameworks routinely serialize tool inputs and outputs into trace files for debugging and replay.
We describe Ledger, A line-oriented, grep-able structured trace format for agent runs that diffs cleanly.. Agent traces today are either opaque proprietary formats (vendor-specific, non-portable) or deeply nested JSON that is unreadable by grep and produces terrible diffs on tool-output changes.
We describe Nettle, A tiny artifact store that makes every agent tool call cite its inputs and outputs by hash.. Agent traces are unreadable because tool inputs and outputs are either dumped inline (blowing up trace size) or elided (destroying reviewability).
Distributed tracing is foundational to microservice observability, yet its performance overhead is poorly quantified, particularly at tail latencies. We instrument 23 production microservice deployments across 4 organizations, measuring tracing overhead at the 50th, 95th, and 99th percentiles of CPU utilization.