model_reasoning_effort from config.toml seems overridden by last-used reasoning on fresh CLI launch

What version of Codex CLI is running?

0.120.0

What subscription do you have?

ChatGPT Pro 20x

Which model were you using?

gpt-5.4

What platform is your computer?

Microsoft Windows NT 10.0.26220.0 x64

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

PowerShell

What issue are you seeing?

A fresh codex session can start with the previously used reasoning effort instead of the value in ~/.codex/config.toml.

My config:

model = "gpt-5.4"
model_reasoning_effort = "high"

But after using xhigh in a prior session, a brand-new codex launch started with xhigh.

What steps can reproduce the bug?

1. Set in ~/.codex/config.toml:

model = "gpt-5.4"
model_reasoning_effort = "high"

1. Start codex
2. Change reasoning effort to xhigh
3. Exit
4. Start a fresh new codex session

What is the expected behavior?

A fresh CLI launch should respect model_reasoning_effort from ~/.codex/config.toml, or the docs should explicitly state that persisted last-used state overrides config on startup.

Additional information

This may be related to the CLI 0.116.0 changelog entry saying model and reasoning effort are persisted in sqlite.