cache-diagnostics changedbuild-with-claude/cache-diagnostics
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10271027## Limitations
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1029* **Claude API only:** Not available on Amazon Bedrock or Google Cloud.
1029* **Claude API only:** Not available on Amazon Bedrock or Claude Models on Google Cloud (Google managed).
10301030* **Limited retention:** Fingerprints for `previous_message_id` lookup expire after a short period. Run diagnostic comparisons between closely spaced requests.
10311031* **Same workspace:** The previous request must have run in the same organization and workspace. To check, compare the `anthropic-workspace-id` [response header](https://platform.claude.com/docs/en/api/overview#response-headers) on the two responses.
10321032* **Comparison horizon:** For very long conversations where the only change is deep in the message list, the response might be `unavailable` rather than a precise location.
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