[MODEL] Massive degeneration in behavoiur the last few days

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Claude ignored my instructions or configuration

What You Asked Claude to Do

"Current pathfinding does not allow phasing anymore, why?"

What Claude Actually Did

Insted of telling me why it reverted 3 hours of changes, and then chages those changes and fully made up it's own idea about how things should work. It's just like the old out of context hallusinations are back.
Is that the case, that we do not actualy have 1M of context?

Expected Behavior

It should have answered my why the phasing (that is avaible in the code) was never triggered to be used.

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

Just use it with 1M context, it does things like this all the time, just like it was before the context compressing and you went over the context limit.

Claude Model

Opus

Relevant Conversation

Impact

High - Significant unwanted changes

Claude Code Version

2.1.89 (Claude Code)

Platform

Anthropic API

Additional Context

It have been like this and just gotten worse the last week, since the last time the service was down.
Is it another one of those issues you had a year ago, as it seems just like it..