It works for me on the https://claude.ai web all but doesn't appear to work in the Claude iOS app.

I tried "Tell me everything you can about your shell and Python environments" and got some interesting results after it ran a bunch of commands.

Linux runsc 4.4.0 #1 SMP Sun Jan 10 15:06:54 PST 2016 x86_64 x86_64 x86_64 GNU/Linux

Ubuntu 24.04.2 LTS

Python 3.12.3

/usr/bin/node is v18.19.1

Disk Space: 4.9GB total, with 4.6GB available

Memory: 9.0GB RAM

Attempts at making HTTP requests all seem to fail with a 403 error. Suggesting some kind of universal proxy.

But telling it to "Run pip install sqlite-utils" worked, so apparently they have allow-listed some domains such as PyPI.

I poked around more and found these environment variables:

  HTTPS_PROXY=http://21.0.0.167:15001
  HTTP_PROXY=http://21.0.0.167:15001

On further poking, some of the allowed domains include github.com and pypi.org and registry.npmjs.org - the proxy is running Envoy.

Anthropic have their own self-issued certificate to intercept HTTPS.

▲ simonw 5 days ago | parent | next [-]

	▲	simonw 5 days ago \| parent [-]
		This is now an extensive blog post: https://simonwillison.net/2025/Sep/9/claude-code-interpreter...

▲ s1110 5 days ago | parent | prev [-]

> Linux runsc 4.4.0

Ubuntu 24.04.2 runs on GNU/Linux 6.8+ 4.4.0 is something from Ubuntu 14.04

	▲	vidarh 5 days ago \| parent [-]
		Runsc 4.4.0 is the gVisor[1] runtime - "an application kernel that implements a Linux-like interface" - not Linux. [1] https://github.com/google/gvisor