Cyber safety check blocks reading open-source nginx sources during normal module development

What version of Codex CLI is running?

codex-cli 0.147.0

What subscription do you have?

pro

Which model were you using?

gpt-5.6-sol xhigh

What platform is your computer?

Darwin 25.6.0 arm64 arm

What terminal emulator and version are you using (if applicable)?

iTerm2

Codex doctor report

{
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  }
}

What issue are you seeing?

While doing ordinary development on my own nginx third-party module (C),
Codex replaced its response with the cyber safety block:

ⓘ This content can't be shown
We take extra caution with cybersecurity requests. If you're a security
professional, you may be able to apply for Trusted Access.
Trusted Access: https://openai.com/form/enterprise-trusted-access-for-cyber/
Learn more: https://help.openai.com/en/articles/20001326

The agent was reading upstream nginx source to understand internal
conventions before I write code against them:
ngx_http_upstream.c, ngx_http_upstream_keepalive_module.c,
ngx_event_openssl.c, ngx_string.c, ngx_http_config.h.

This is a false positive. nginx is public, BSD-licensed open source read
from a local checkout. No third-party systems, no networks, no
credentials, no exploitation, no offensive intent. The only "security"
aspect is that I want my own module to be memory-safe.

The block wipes the whole response, so the exploration work is lost and
the task stalls.

What steps can reproduce the bug?

Uploaded thread: 019febaa-4e0a-7cd3-a70a-a3a517b93ae1

What is the expected behavior?

Reading well-known open-source C sources in a local checkout should not
trigger the cyber safeguard. Understanding upstream internals is a
prerequisite for writing any native module for nginx, Apache, PostgreSQL
or similar projects — the current behavior makes Codex unusable for that
entire class of work.

At minimum the block should not discard the whole response when the only
signal is "agent read networking/crypto source files".

Additional information

I am not a security professional and have no need for Trusted Access —
I just want to write a correct C module. The suggested remedy in the
block message does not apply to this use case.

The report identifies Codex CLI 0.147.0 blocking access to open-source nginx sources during module development, but names no repository files, tests, or code entry points. First reproduce the safety check in the reported macOS environment and trace the resulting approval or policy decision; done means normal nginx source reading is no longer incorrectly blocked without weakening the intended safety behavior.