This is a follow-up to https://github.com/openai/codex/pull/15922. That
previous PR deleted the old `tui` directory and left the new
`tui_app_server` directory in place. This PR renames `tui_app_server` to
`tui` and fixes up all references.
This is the part 1 of 2 PRs that will delete the `tui` /
`tui_app_server` split. This part simply deletes the existing `tui`
directory and marks the `tui_app_server` feature flag as removed. I left
the `tui_app_server` feature flag in place for now so its presence
doesn't result in an error. It is simply ignored.
Part 2 will rename the `tui_app_server` directory `tui`. I did this as
two parts to reduce visible code churn.
New style guide:
# Headers, primary, and secondary text
- **Headers:** Use `bold`. For markdown with various header levels,
leave in the `#` signs.
- **Primary text:** Default.
- **Secondary text:** Use `dim`.
# Foreground colors
- **Default:** Most of the time, just use the default foreground color.
`reset` can help get it back.
- **Selection:** Use ANSI `blue`. (Ed & AE want to make this cyan too,
but we'll do that in a followup since it's riskier in different themes.)
- **User input tips and status indicators:** Use ANSI `cyan`.
- **Success and additions:** Use ANSI `green`.
- **Errors, failures and deletions:** Use ANSI `red`.
- **Codex:** Use ANSI `magenta`.
# Avoid
- Avoid custom colors because there's no guarantee that they'll contrast
well or look good on various terminal color themes.
- Avoid ANSI `black`, `white`, `yellow` as foreground colors because the
terminal theme will do a better job. (Use `reset` if you need to in
order to get those.) The exception is if you need contrast rendering
over a manually colored background.
(There are some rules to try to catch this in `clippy.toml`.)
# Testing
Tested in a variety of light and dark color themes in Terminal, iTerm2, and Ghostty.
