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codex/codex-rs/tui
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Felipe Coury 20d1b7674d fix(tui): improve markdown table column allocation (#24346)
## Why

Markdown tables with a long path-heavy column could allocate almost all
available width to that column and collapse neighboring prose columns to
only a few characters. In rollout summaries this made `Unit` and `What
It Adds` difficult to read, even though the long `Files` values were the
content best suited to wrapping.

The affected example also specified `Files` as right aligned in its
markdown delimiter (`---:`). This change preserves that requested
alignment while improving how width is distributed.

| Before | After |
|---|---|
| <img width="1709" height="764" alt="image"
src="https://github.com/user-attachments/assets/932ab21c-b72d-48a2-9aad-b69da87a0968"
/> | <img width="1711" height="855" alt="image"
src="https://github.com/user-attachments/assets/4028bd20-2228-4c2f-be8a-1866325b7f62"
/> |


## What Changed

- Classify table columns as narrative, token-heavy, or compact during
width allocation.
- Shrink token-heavy path and URL columns before shrinking narrative
prose, while preserving compact counts and short labels longest.
- Use readable soft floors for narrative and token-heavy content before
falling back to tighter layouts.
- Add snapshot coverage for a rollout-shaped table containing
right-aligned file paths and prose columns.

## How to Test

1. Render a markdown table with `Unit`, right-aligned `Files`, `Adds`,
`Removes`, and `What It Adds` columns at a constrained terminal width.
2. Put long repository paths in `Files` and sentence-length content in
`Unit` and `What It Adds`.
3. Confirm that `Files` remains right aligned but wraps before the
narrative columns become unreadable.
4. Confirm that the compact numeric columns remain easy to scan.

Targeted tests:
- `just test -p codex-tui markdown_render`

Validation note: `just test -p codex-tui` was also attempted and reached
two existing unrelated failures in
`app::tests::update_feature_flags_disabling_guardian_*`; the markdown
rendering regression test passes in the targeted run.
20d1b7674d ยท 2026-05-25 15:09:17 -03:00
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