claude-code - 💡(How to fix) Fix [MODEL] Opus 4.6 Performance Degraded since end of March [1 comments, 2 participants]

TL;DR

The issue can be mitigated by re-enabling the preflight checks for Claude to read all necessary files and instructions before editing the code.

Guidance

• Review the configuration of the Claude Code project to ensure that it is set to read all necessary files, including Claude.md, Lessons.md, and Progress.md, before editing the code.
• Verify that the Accept Edits mode is set to OFF to prevent auto-accepting changes without proper review.
• Check the project settings to see if there are any updates or changes made recently that could be causing the issue, especially since the end of March.
• Test the project with a previous version of the Claude Code to see if the issue persists, to determine if it's a version-specific problem.

Example

No code snippet is provided as the issue seems to be related to configuration and project settings.

Notes

The issue seems to be specific to the Opus model and the Anthropic API platform, and the cause is unclear. Further investigation is needed to determine the root cause of the problem.

Recommendation

Apply workaround: Re-enable preflight checks and review project settings to ensure that Claude is reading all necessary files and instructions before editing the code. This is because the issue seems to be related to a change in behavior since the end of March, and re-enabling preflight checks may help mitigate the problem.