feat(js-core): highlight_phrase / highlight_regex on string displayer

[paddymul]

Summary

Adds search highlighting to the string displayer. Two new optional fields on StringDisplayerA:

• highlight_phrase: string | string[] — phrase(s) to highlight (regex-escaped, longest-first alternation so overlapping terms pick the longer match)
• highlight_regex: string — JS regex source (no slashes/flags)
• highlight_color: string — any CSS color, defaults to "yellow"

When either is set, the column switches from a valueFormatter to a cell renderer that runs the existing string formatter first (so max_length truncation is preserved) and wraps matches in <mark style={{backgroundColor: color, padding: 0}}>. Matching is case-insensitive. highlight_regex wins if both are supplied; invalid regex sources fall back to plain text with a console.warn. A tooltipValueGetter is added alongside so the full untruncated value is still hoverable.

Usage from Python:

'displayer_args': {
    'displayer': 'string',
    'max_length': 200,
    'highlight_phrase': ['error', 'fail'],   # or a single string, or use highlight_regex
    'highlight_color': '#ffe066',
}

Test plan

• pnpm test — 214 passed (was 212; +2 new tests covering phrase and regex highlighting)
• pnpm run build clean (tsc + vite)
• CI green

[github-actions]

📦 TestPyPI package published

pip install --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo==0.13.5.dev25996853688

or with uv:

uv pip install --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo==0.13.5.dev25996853688

MCP server for Claude Code

claude mcp add buckaroo-table -- uvx --from "buckaroo[mcp]==0.13.5.dev25996853688" --index-strategy unsafe-best-match --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ buckaroo-table

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid wrapping user regexes with capturing groups

When highlight_regex contains a capturing group, raw.split(pattern) includes every captured submatch in the returned array, but the renderer assumes only odd indexes are full matches. For example highlight_regex: "a(b)" on xabz renders x<mark>ab</mark>bz, duplicating the captured b, so valid JS regex sources can corrupt the displayed cell text. Use a non-splitting approach or avoid exposing user captures to split.

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