[MODEL] Opus 5.5 - Palantir showed up in thinking? Model denied a root cause analysis and session got blocked?

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 refused a reasonable request

What You Asked Claude to Do

I was asking Claude to work and review a test c;lass we needed to work on, but I saw "Palantir" showed up during the process which got me curious.

What Claude Actually Did

1. Claude read the project files and reviewing deployment
2. Noticed Palantir showed up in one of the lines
3. I asked Claude to review, he initially said it was a "typo"
4. I asked it to dig in, then my session got blocked by Claude code legal notice (safeguards)?

Expected Behavior

1. Review repo
2. No Palantir showing up anywhere, we dont have that word or company anywhere in the project
3. Claude shouldnt be blocked in investigating when it said it was just a "typo" which he later said was wrong.

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

No, only happened once

Steps to Reproduce

_No response_

Claude Model

Opus

Relevant Conversation

Impact

Low - Minor inconvenience

Claude Code Version

v2.1.280

Platform

Anthropic API

Additional Context

<img width="1877" height="538" alt="Image" src="https://github.com/user-attachments/assets/4b1302bc-d78d-484a-8ea6-4d3419a3e9ca" />

<img width="1878" height="366" alt="Image" src="https://github.com/user-attachments/assets/f9502c13-b2fd-4b3c-88c3-5abbdd5e2de6" />

<img width="1801" height="465" alt="Image" src="https://github.com/user-attachments/assets/8fa5a0d4-4397-4f06-93d9-95487c2a93e5" />