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Measure deferred tool namespace fragments before and after truncation - #47873
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copyberry[bot] merged 1 commit intoSep 24, 2026
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…#47873) ## What changed Record `codex.thread.tools.namespaces_total` and `codex.thread.tools.fragment_bytes` histograms through session telemetry. Tag samples by `stage` (`before` or `after` the 4 KiB cap) and `kind` (`snapshot` or `delta`). Measure bytes after description normalization and XML escaping, including the `` wrapper, with explicit fragment-size buckets. Delta counts include only changed entries, and unchanged state emits no samples. ## Testing Extend rendering tests to verify snapshot and delta metrics, omission counts, byte sizes with Unicode and XML escaping, and no samples for unchanged state. GitOrigin-RevId: 26543585e2bea54bff6d63263faa9a6ca5dca379
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Measure deferred tool namespace fragments before and after truncation
What changed
Record
codex.thread.tools.namespaces_totalandcodex.thread.tools.fragment_byteshistograms through session telemetry. Tag samples bystage(beforeorafterthe 4 KiB cap) andkind(snapshotordelta). Measure bytes after description normalization and XML escaping, including theDelta counts include only changed entries, and unchanged state emits no samples.
Testing
Extend rendering tests to verify snapshot and delta metrics, omission counts, byte sizes with Unicode and XML escaping, and no samples for unchanged state.