shell_environment_policy.set variables are not available in Hooks

What version of Codex CLI is running?

0.144.6

What subscription do you have?

Free

Which model were you using?

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What platform is your computer?

_No response_

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

_No response_

Codex doctor report

What issue are you seeing?

When I use --config to set an environment variable through shell_environment_policy.set, the variable is available in the Turn execution environment and in Python scripts executed by a Skill. However, the same environment variable is not available in a Stop Hook.

For example, os.environ.get("TEST") returns hello in a Python script executed by a Skill, but returns an empty value when called from the Python script used by the Stop Hook.

What steps can reproduce the bug?

1. Configure a Stop Hook.

1. Run Codex with the following configuration: codex --config 'shell_environment_policy.set.TEST=hello'

1. In a Python script executed by a Skill, run: os.environ.get("TEST")

The result is hello.

1. In the Python script executed by the Stop Hook, run: os.environ.get("TEST")

The result is empty.

What is the expected behavior?

I would expect environment variables configured through shell_environment_policy.set to also be available in Hooks, including Stop Hooks.

Additional information

_No response_