Source record

Published by Anthropic Engineering (T1 source). The original is at https://www.anthropic.com/engineering/april-23-postmortem.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

Anthropic traced recent reports of degraded Claude response quality to three separate changes affecting Claude Code, the Claude Agent SDK, and Claude Cowork. The API was unaffected, and all issues were resolved in version 2.1.116 on April 20.

Vendor postmortem naming the specific changes that hurt output quality — useful calibration for anyone using Claude Code.

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