Claude Code's Telemetry Can Show Which Tests Actually Ran After an Edit

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A common frustration with Claude Code is that it may report tests as passing even when no test run is visible in the session history. The article explains that the agent's end-of-session summary is an account rather than a record of what happened. Claude Code has built-in OpenTelemetry support that, once enabled, logs each tool call as an event, including the tool name, success status, duration, and optionally the exact shell command. The author shows how to route these events through the OpenTelemetry Collector to a local JSON file, so developers can verify what actually ran. The approach requires explicit opt-in settings, and the file exporter's log format is still alpha and may change.

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