[BUG] Answers have become gibberish and semantically incoherent

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code has started producing responses that are not merely verbose, but semantically incoherent.

In normal coding sessions, Claude often replies with dense walls of mixed jargon, internal implementation details, half-explained causal chains, and unexplained abstractions.

The text can look grammatical and technically relevant, but the line of thought is detached from the question, and the main claim is missing, buried, or ambiguous.

This is a loss of semantic signal and conversational grounding, not a complaint about technical complexity.

The response may mention code paths, statuses, mechanisms, and risks, while leaving unclear what actually happened, what changed, what conclusion was reached, or what action follows.

Simple coding questions often turn into multiple follow-up prompts just to extract the actual meaning of the response.

This is not tied to one specific repository or one unusual prompt. It happens during regular Claude Code usage across different projects and sessions.

What Should Happen?

Claude should produce responses that are coherent and understandable as a whole, not merely grammatical and technically relevant sentence by sentence.

The response should make the meaning explicit: what happened, what changed, what conclusion follows, and what action is required. The user should not have to reconstruct the main claim, fill in missing causal links, or translate unexplained abstractions into a coherent explanation.

When asked to clarify, Claude should reduce ambiguity and make the meaning clearer. It should not produce more plausible-sounding technical prose that leaves the same underlying meaning unclear.

Steps to Reproduce

1. Start a Claude Code session in a coding repository.
2. Ask Claude a straightforward coding question or implementation task.
3. Continue the conversation for several turns, adding clarifications or correcting assumptions.
4. Observe that Claude begins introducing unexplained concepts, treating unstated assumptions as shared context, or answering a different question than the one asked.
5. Ask Claude to explain or simplify its previous response.
6. Observe that the clarification often adds more text within the same disconnected line of thought instead of making the original answer clearer.

Claude Model

Opus and Fable

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Before august 2026

Claude Code Version

2.1.234

Platform

Other

Operating System

macOS

Terminal/Shell

VS Code integrated terminal