claude-code - 💡(How to fix) Fix [BUG] API Error 400: cache_control cannot be set for empty text blocks [1 comments, 2 participants]

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.306.content.2.text: cache_control cannot be set for empty text blocks"},"request_id":"req_011CaKAoZGt1W7zbyMEA3a3E"}

TL;DR

The issue can likely be mitigated by modifying the conversation to avoid triggering the cache_control error for empty text blocks.

Guidance

• Investigate the messages.306.content.2.text field in the API request to understand why it's being set as an empty text block, which is causing the cache_control error.
• Review the Claude Code documentation to see if there are any settings or configurations that can be adjusted to prevent empty text blocks from being sent in the API request.
• Consider adding a check in the conversation flow to ensure that text blocks are not empty before sending the API request.
• Verify that the issue is indeed a regression by testing the same conversation flow in a previous version of Claude Code, if possible.

Example

No code snippet can be provided without more information about the conversation flow and API request implementation.

Notes

The root cause of the issue is likely related to the way the conversation flow is handling empty text blocks, but more information is needed to provide a definitive solution. The fact that retrying usually works suggests that the issue may be intermittent or related to a specific edge case.

Recommendation

Apply workaround: Modify the conversation flow to handle empty text blocks and prevent the cache_control error. This is recommended because the issue is likely related to a specific implementation detail, and a workaround can be implemented without waiting for a fix from the Claude Code team.