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Ran 11 Feb 2026 08:27PM UTC

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Committed 11 Feb 2026 08:18PM UTC coverage: 61.614% (-0.05%) from 61.667%

Job # 21921569153.1

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github

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web-flow

Commit Message

Add explicit histogram bucket boundaries to duration metrics (#3787)

The legacy duration histograms (toolhive_mcp_request_duration,
toolhive_vmcp_backend_requests_duration, toolhive_vmcp_workflow_duration)
recorded values in seconds but used the OTel SDK default bucket boundaries
which are designed for millisecond-scale values. This caused all
observations to land in the first bucket, making histogram_quantile
calculations meaningless.

Apply the same MCPHistogramBuckets boundaries already used by the
spec-aligned metrics (mcp.server.operation.duration,
mcp.client.operation.duration).

Fixes #3680

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

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