Use CSS subgrid to align nested grid items to parent tracks
SkillDev toolsSubgrid is a skill for AI agents that helps review CSS grid layouts, especially card grids where nested content areas drift out of alignment. It guides the agent so child items line up with the corresponding sections of sibling cards, without JavaScript intervention. The first keyword phrase to know here is subgrid alignment across cards, which is what the skill focuses on when layouts look uneven.
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Details
Instructions available. Your AI can read the instructions. Execution depends on the setup they require.
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No other account needed.
Have a project with CSS grid layouts, such as a card grid, to review.
What your AI can do with it
- Review card grid layouts with misaligned content areas
- Align nested grid child items with sibling cards' corresponding sections
- Fix alignment issues without JavaScript intervention
Getting started
- Have a project with CSS grid layouts, such as a card grid, to review.
- Add the subgrid skill to your agent's available skills.
- Ask the agent to review the grid layout where nested items need to align across cards.
What this skill tells your AI
The instructions your AI receives, as published by thedaviddias/front-end-checklist in skills/subgrid/SKILL.md and read by ahel’s review.
Card grids are one of the most common UI patterns, but aligning content across cards — matching title heights, content areas, and footers — has historically required JavaScript height measurement or CSS hacks. Subgrid solves this at the layout engine level: nested items participate directly in the parent grid's tracks, so alignment is automatic, performant, and CSS-only.
Quick Reference
- subgrid lets a nested grid inherit its parent grid tracks instead of creating new ones
- Solves misaligned card titles, content, and footers across rows of cards
- No JavaScript height matching needed — the browser handles track alignment
- Universal support: Safari 16+, Chrome/Edge 117+, Firefox 71+
Check
Look for card grid layouts in this CSS where card content areas (titles, body text, footers) might not align across cards of different content lengths. These are candidates for subgrid.
Fix
Convert this card grid to use subgrid. Show how to set grid-template-rows on the parent grid, then apply grid-row: span N and grid-template-rows: subgrid on each card to inherit the parent tracks.
Explain
Explain how CSS subgrid works, how it differs from a nested grid, what problem it solves with card alignment, and when to use subgrid on columns versus rows.
Code Review
Review card grid and nested grid layouts in this stylesheet. Flag any layout that uses JavaScript height matching, fixed heights, or display: contents workarounds to achieve cross-card alignment — and show the subgrid equivalent.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/css/subgrid
Signals
- GitHub stars
- 74k
- Forks
- 7k
- Last commit
- Oct 2026
- Hacker News mentions
- 5
Questions
- When should this skill be used?
- Use it when reviewing card grid layouts with misaligned content areas, or any nested grid where child items need to align with sibling cards' corresponding sections without JavaScript intervention.
- Does it require writing JavaScript to fix alignment?
- No. The skill is aimed at getting nested items to align without JavaScript intervention.
Advanced
- Item type
- skill
- Key
subgrid- Source
- github.com/thedaviddias/front-end-checklist
github.com/thedaviddias/front-end-checklist