Update extensions.json for potential malware "Anthropic.claude-code"

[kineticsquid]

• I have read the note above about PRs contributing or fixing extensions
• I have tried reaching out to the extension maintainers about publishing this extension to Open VSX (if not, please create an issue in the extension's repo using this template).
• This extension has an OSI-approved OSS license (we don't accept proprietary extensions in this repository)

Description

This is to remove potential malware extension "Anthropic.claude-code".

[erikolofsson]

This broke the legitimate Claude Code extension that is installed by the claude command line tool.

EclipseFdn/open-vsx.org#4163

[kineticsquid]

@erikolofsson I'm sorry, we received a report of malware on this. I attempted to reach out to the Anthropic team, but was unsuccessful. Can you reach out directly to me at [email protected].

[erikolofsson]

I'm not with Anthropic, so it's probably best to try to reach out to them again. Did you try @igorkofman that claimed the namespace?

[kineticsquid]

Yeah, that's what I tried. It is August though. More importantly, you'd confirm that the extension, Anthropic.claude-code, was legitimate?

[erikolofsson]

I don't know about the extension that was on Open VSX, as the extension is installed by the claude tool:
https://docs.anthropic.com/en/docs/claude-code/ide-integrations

So basically what happens is that the tool installs the extension automatically, then every 60 seconds VS code checks if the extension is in the malicious list and uninstalls it again.

[kineticsquid]

@erikolofsson Thanks, I was going to ask you to open a GH issue on this. Let's take the discussion there.