Help output shows incorrect binary name in Usage section

What version of Codex is running?

0.21.0

Which model were you using?

_No response_

What platform is your computer?

Linux 6.8.0-60-generic x86_64 x86_64

What steps can reproduce the bug?

Run codex -h or codex --help from npm-installed CLI. The output shows Usage with the binary name as codex-x86_64-unknown-linux-musl, which is not the actual command users run (typically codex).

What is the expected behavior?

The Usage/help output should show the correct CLI command name (e.g., codex), matching how users invoke the tool, regardless of underlying binary target triple.

What do you see instead?

Usage/help output displays codex-x86_64-unknown-linux-musl as the command name, which is confusing and does not match user-installed executable.

Example output:

$ codex --help 
Codex CLI

If no subcommand is specified, options will be forwarded to the interactive CLI.

Usage: codex-x86_64-unknown-linux-musl [OPTIONS] [PROMPT]
       codex-x86_64-unknown-linux-musl [OPTIONS] [PROMPT] <COMMAND>

Additional information

Likely related to how the binary name is generated or displayed in help output. Should use the actual command as invoked, possibly via a shell variable like $0 or a platform equivalent in Rust.

Alternatively, hardcoding "codex" as the command name in help output would be clearer for users, though less adaptive to future renaming or binary changes.