[Bug] Claude ignores repeated code formatting guidelines

Bug Description
Claude code (Opus 4.7) doesn't stick to code formatting guidelines I have given it multiple times! It just gives a flying f!

Environment Info

• Platform: win32
• Terminal: null
• Version: 2.1.126
• Feedback ID: 1c4feffa-7719-40d0-a455-0d3c2feb50c1

Errors

[{"error":"Error: Request was aborted.\n    at makeRequest (B:/~BUN/root/src/entrypoints/cli.js:50:3448)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-02T17:58:52.136Z"}]