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fix(tui): don't italicize intraword underscores in markdown

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The inline markdown regex matched `_..._` / `__...__` anywhere, so file
paths like `browser_screenshot_ecc1c3feab.png` got mid-path italics.

Require non-word flanking (`(?<!\w)` / `(?!\w)`) on underscore emphasis
so snake_case identifiers and paths render literally, matching the
CommonMark intraword rule. `*` / `**` keep intraword semantics.
This commit is contained in:
Brooklyn Nicholson 2026-04-20 17:04:09 -05:00
parent 36e8435d3e
commit b17eb94907
2 changed files with 39 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

10
ui-tui/src/components/markdown.tsx
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@ -12,8 +12,8 @@ const DEF_RE = /^\s*:\s+(.+)$/
const TABLE_DIVIDER_CELL_RE = /^:?-{3,}:?$/
const MD_URL_RE = '((?:[^\\s()]|\\([^\\s()]*\\))+?)'
const INLINE_RE = new RegExp(
`(!\\[(.*?)\\]\\(${MD_URL_RE}\\)|\\[(.+?)\\]\\(${MD_URL_RE}\\)|<((?:https?:\\/\\/|mailto:)[^>\\s]+|[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,})>|~~(.+?)~~|\`([^\\\`]+)\`|\\*\\*(.+?)\\*\\*|__(.+?)__|\\*(.+?)\\*|_(.+?)_|==(.+?)==|\\[\\^([^\\]]+)\\]|\\^([^^\\s][^^]*?)\\^|~([^~\\s][^~]*?)~|(https?:\\/\\/[^\\s<]+))`,
export const INLINE_RE = new RegExp(
`(!\\[(.*?)\\]\\(${MD_URL_RE}\\)|\\[(.+?)\\]\\(${MD_URL_RE}\\)|<((?:https?:\\/\\/|mailto:)[^>\\s]+|[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,})>|~~(.+?)~~|\`([^\\\`]+)\`|\\*\\*(.+?)\\*\\*|(?<!\\w)__(.+?)__(?!\\w)|\\*(.+?)\\*|(?<!\\w)_(.+?)_(?!\\w)|==(.+?)==|\\[\\^([^\\]]+)\\]|\\^([^^\\s][^^]*?)\\^|~([^~\\s][^~]*?)~|(https?:\\/\\/[^\\s<]+))`,
'g'
)
@ -90,7 +90,7 @@ const isTableDivider = (row: string) => {
return cells.length > 1 && cells.every(cell => TABLE_DIVIDER_CELL_RE.test(cell))
}
const stripInlineMarkup = (value: string) =>
export const stripInlineMarkup = (value: string) =>
value
.replace(/!\[(.*?)\]\(((?:[^\s()]|\([^\s()]*\))+?)\)/g, '[image: $1] $2')
.replace(/\[(.+?)\]\(((?:[^\s()]|\([^\s()]*\))+?)\)/g, '$1')
@ -98,9 +98,9 @@ const stripInlineMarkup = (value: string) =>
.replace(/~~(.+?)~~/g, '$1')
.replace(/`([^`]+)`/g, '$1')
.replace(/\*\*(.+?)\*\*/g, '$1')
.replace(/__(.+?)__/g, '$1')
.replace(/(?<!\w)__(.+?)__(?!\w)/g, '$1')
.replace(/\*(.+?)\*/g, '$1')
.replace(/_(.+?)_/g, '$1')
.replace(/(?<!\w)_(.+?)_(?!\w)/g, '$1')
.replace(/==(.+?)==/g, '$1')
.replace(/\[\^([^\]]+)\]/g, '[$1]')
.replace(/\^([^^\s][^^]*?)\^/g, '^$1')