mom-oai 25a0f6784d [codex] Show ctrl + t hint on truncated exec output in TUI (#17076)
## What

Show an inline `ctrl + t to view transcript` hint when exec output is
truncated in the main TUI chat view.

## Why

Today, truncated exec output shows `… +N lines`, but it does not tell
users that the full content is already available through the existing
transcript overlay. That makes hidden output feel lost instead of
discoverable.

This change closes that discoverability gap without introducing a new
interaction model.

Fixes: CLI-5740

## How

- added an output-specific truncation hint in `ExecCell` rendering
- applied that hint in both exec-output truncation paths:
  - logical head/tail truncation before wrapping
  - row-budget truncation after wrapping
- preserved the existing row-budget behavior on narrow terminals by
reserving space for the longer hint line
- updated the relevant snapshot and added targeted regression coverage

## Intentional design decisions

- **Aligned shortcut styling with the visible footer UI**  
The inline hint uses `ctrl + t`, not `Ctrl+T`, to match the TUI’s
rendered key-hint style.

- **Kept the noun `transcript`**  
The product already exposes this flow as the transcript overlay, so the
hint points at the existing concept instead of inventing a new label.

- **Preserved narrow-terminal behavior**  
The longer hint text is accounted for in the row-budget truncation path
so the visible output still respects the existing viewport cap.

- **Did not add the hint to long command truncation**  
This PR only changes hidden **output** truncation. Long command
truncation still uses the plain ellipsis form because `ctrl + t` is not
the same kind of “show hidden output” escape hatch there.

- **Did not widen scope to other truncation surfaces**  
This does not change MCP/tool-call truncation in `history_cell.rs`, and
it does not change transcript-overlay behavior itself.

## Validation

### Automated
- `just fmt`
- `cargo test -p codex-tui`

### Manual
- ran `just tui-with-exec-server`
- executed `!seq 1 200`
- confirmed the main view showed the new `ctrl + t to view transcript`
truncation hint
- pressed `ctrl + t` and confirmed the transcript overlay still exposed
the full output
- closed the overlay and returned to the main view

## Visual proof

Screenshot/video attached in the PR UI showing:
- the truncated exec output row with the new hint
- the transcript overlay after `ctrl + t`
25a0f6784d · 2026-04-09 11:01:30 -07:00
5,226 Commits
2026-03-26 16:50:07 -07:00
2025-04-16 12:56:08 -04:00
2026-02-06 14:41:53 +01:00
2025-04-16 12:56:08 -04:00
2026-03-10 04:11:31 +00:00
2026-04-07 10:55:58 -07:00

npm i -g @openai/codex
or brew install --cask codex

Codex CLI is a coding agent from OpenAI that runs locally on your computer.

Codex CLI splash


If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.


Quickstart

Installing and running Codex CLI

Install globally with your preferred package manager:

# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex

Then simply run codex to get started.

You can also go to the latest GitHub Release and download the appropriate binary for your platform.

Each GitHub Release contains many executables, but in practice, you likely want one of these:

  • macOS
    • Apple Silicon/arm64: codex-aarch64-apple-darwin.tar.gz
    • x86_64 (older Mac hardware): codex-x86_64-apple-darwin.tar.gz
  • Linux
    • x86_64: codex-x86_64-unknown-linux-musl.tar.gz
    • arm64: codex-aarch64-unknown-linux-musl.tar.gz

Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.

Using Codex with your ChatGPT plan

Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.

You can also use Codex with an API key, but this requires additional setup.

Docs

This repository is licensed under the Apache-2.0 License.

S
Description
No description provided
Readme Apache-2.0 156 MiB
Languages
Rust 96.1%
Python 2.9%
Shell 0.3%
Starlark 0.2%
TypeScript 0.2%
Other 0.1%