Initial diff format incorrect (command succeeds after model corrects itself)

Question

### What version of Codex is running?

0.20.0

### Which model were you using?

gpt-5

### What platform is your computer?

Linux 6.6.87.2-microsoft-standard-WSL2 x86_64 x86_64

### What steps can reproduce the bug?

>codex
>/init

### What is the expected behavior?

It can successfully get the diff format correct the first time.

### What do you see instead?

> thinking
> **Correcting file format**
> 
> I see that for adding a file in the patch format, every line needs to be prefixe
> d with a