Developer Builds AI-Powered ETH Milestone Verifier, Learns Hard Lessons on Observability

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A developer built Weft, an autonomous system where three independent AI agents verify project milestones and automatically release or refund staked ETH based on on-chain evidence. During early testing, a silent timeout caused one of three verifier nodes to miss a vote, but the 2-of-3 quorum passed undetected for 40 minutes until logs were checked manually. This prompted the developer to instrument the system with OpenTelemetry and SigNoz, adding detailed tracing at key boundaries such as peer broadcasts, consensus waits, and encrypted ballot submissions. The tracing revealed hidden bottlenecks, including FHE encryption calls taking 4–6 seconds each, which were invisible in raw logs. The key takeaway was that for financial automation systems, observability is not optional — it is a core part of the product itself.

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