Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/maithemewp/mai-columns/archive/refs/heads/main.zipRepeatable, per-width column arrangements with simple and complex layouts.
Define an arrangement — a sequence of size tokens that repeats across however many columns you add — per width bucket: Wide (≥1024px), Medium (640–1023px), Narrow (<640px). Buckets measure the container the columns sit in (CSS container queries), not the device, so nested columns and sidebar placements respond to their own available room.

Tokens
Preset fractions (25%–100%), custom fractions (2/5), percentages, CSS lengths (300px), fit (hug content), fill (share leftover space), and break (end the row early). Empty buckets inherit the next-wider setting.
Ordering
Per-bucket "Reverse" toggles on the parent block, plus an optional per-column order value per bucket (CSS order — visual only; keyboard and screen reader order follows the document).

Requirements
WordPress 7.0+, PHP 8.2+. Works with any theme.
Development
npm install && npm run build— build the blocks (build output is committed).php tests/harness/arrangement-resolver.php— PHP resolver tests.node --test tests/js/— JS resolver tests (same shared fixtures, so editor preview and PHP render can't drift).tests/e2e/— Playwright front-end matrix + a reusable showcase page (wp post create tests/e2e/showcase-page.html --post_type=page --post_status=publish --post_title='Mai Columns Showcase' --post_name=mai-columns).