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claude-code - 💡(How to fix) Fix [Bug] Claude 3.5 Sonnet regression: Insufficient context analysis before proposing solutions [1 comments, 2 participants]

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anthropics/claude-code#52560•Fetched 2026-04-24 06:03:54
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Root Cause

Bug Description Opus 4.7 is making more and more logical errors that is getting increasingly concerning. It is no longer checking deeply when performing tasks..even when asked to do investigations into existing system before proposing solution...it skips over detail and proposes interventions in the wrong places as a rsult of this shoddy retrieval...this is a serious regression because now I have to spend A LOT OF DETAILED EFFORT guiding it to the right context for it to come up with the right solution...my harness had already had this dialed in all the way up to 4.6...4.7 is just ignoring instructions, performing shallow investigations and as a result proposing wrong headed solutions....this is a SIGNIFICANT REGRESSION from 4.6...but worse...if this lack of attention to detail carries over to an auto-mode code build phase for a large spec...the problem is going to compound exponentially...this needs to be resolved ASAP...I DO NOT TRUST 4.7.....

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Bug Description Opus 4.7 is making more and more logical errors that is getting increasingly concerning. It is no longer checking deeply when performing tasks..even when asked to do investigations into existing system before proposing solution...it skips over detail and proposes interventions in the wrong places as a rsult of this shoddy retrieval...this is a serious regression because now I have to spend A LOT OF DETAILED EFFORT guiding it to the right context for it to come up with the right solution...my harness had already had this dialed in all the way up to 4.6...4.7 is just ignoring instructions, performing shallow investigations and as a result proposing wrong headed solutions....this is a SIGNIFICANT REGRESSION from 4.6...but worse...if this lack of attention to detail carries over to an auto-mode code build phase for a large spec...the problem is going to compound exponentially...this needs to be resolved ASAP...I DO NOT TRUST 4.7.....

Further...while previous versions did very well on rule following...and i was able to get very smooth session to session continuuity and consistency in behavior with my context continuity mechanism....4.7 agents...even aided by rich context...now feels more like a stateless session all over again...it's like it's ignoring rules and claude.md completely and is lost......

Environment Info

  • Platform: darwin
  • Terminal: Apple_Terminal
  • Version: 2.1.118
  • Feedback ID: 83b98be5-3182-4ebe-b087-b26483e900da

Errors

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extent analysis

TL;DR

The most likely fix for the regression in Opus 4.7 is to review and adjust the configuration or rules to ensure it properly follows instructions and performs deep investigations.

Guidance

  • Review the claud.md file to ensure it is correctly formatted and contains all necessary rules and context for Opus 4.7 to follow.
  • Verify that the context continuity mechanism is properly configured and functioning as expected to provide session-to-session consistency.
  • Test Opus 4.7 with a minimal set of rules and context to isolate the issue and identify any specific problems.
  • Consider reverting to Opus 4.6 to ensure that the issue is specific to version 4.7 and not a configuration problem.

Notes

The lack of error messages in the Errors section suggests that the issue may be related to configuration or rules rather than a technical error. The fact that previous versions worked correctly implies that the problem may be specific to version 4.7.

Recommendation

Apply workaround: Revert to Opus 4.6 until the issue with 4.7 is resolved, as it is a significant regression that can cause incorrect solutions and loss of context continuity.

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#device allocation#model download#tokenizer error#prompt formatting#chain error

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