Tip: OpenTelemetry Traces No Longer Fragment When a PreToolUse Hook Defers a Tool
Claude Code Changelog·medium signal
Claude Code 2.1.239 fixes OpenTelemetry trace fragmentation where a tool execution deferred by a `PreToolUse` hook resumed as a brand new trace instead of rejoining the original turn. Anyone building dashboards over agent telemetry has been undercounting turn duration and losing the causal link between a hook decision and the tool it gated. Re-check any per-turn latency or cost aggregations built before this version.