Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
A skill your agent uses 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…
MITAuto-check passed
Install Subgrid
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist subgrid --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/subgrid .claude/skills/subgrid && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .claude/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgridType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist subgrid --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/subgrid .agents/skills/subgrid && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .agents/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist subgrid --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/subgrid .cursor/skills/subgrid && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .cursor/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/subgrid--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist subgrid --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/subgrid .gemini/skills/subgrid && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .gemini/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist subgridInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/subgrid .github/skills/subgrid && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .github/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist subgrid --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/subgrid .opencode/skills/subgrid && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "subgrid" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/subgrid into .opencode/skills/subgrid/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subgrid", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
subgrid- GitHub stars
- 74k
- Token cost
- ~541 tokens
- SKILL.md length
- 254 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses 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…
- Reviewing card grid layouts with misaligned content areas
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Any nested grid where child items need to align with sibling cards corresponding sections without JavaScript intervention
What it does
Subgrid is an agent skill from thedaviddias/Front-End-Checklist. Use 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.
Its SKILL.md is about 540 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
It works with JavaScript. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing card grid layouts with misaligned content areas
- Any nested grid where child items need to align with sibling cards corresponding sections without JavaScript intervention
Example prompts
- “/subgrid”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
frontendchecklist.io
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Subgrid loads about 541 tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 51 tokens; SKILL.md has 254 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 254 words, ~541 tokens.
Download SKILL.mdSave it as
.claude/skills/subgrid/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- subgrid
- description
- Use 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.
- metadata.category
- css
- metadata.priority
- low
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 25
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/css/subgrid
Use CSS subgrid to align nested grid items to parent tracks
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.
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/subgrid of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Subgrid next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Subgrid this skillthedaviddias/Front-End-Checklist | 74k | — | ~541 | Automated safety check: Pass | MIT | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Tailwindcss Developmentanonaddy/anonaddy | 4.9k | 10 repos | ~865 | Automated safety check: Pass | MIT | |
| Figma use_figma Plugin API Ruleswarpdotdev/warp | 65k | 4 repos | ~4.4k | Automated safety check: Pass | AGPL-3.0 | |
| GSAP Core Animationgreensock/gsap-skills | 16k | 4 repos | ~3.7k | Automated safety check: Pass | MIT | |
| JavaScript Concept Fact Checkerleonardomso/33-js-concepts | 67k | 1 repos | ~5k | Automated safety check: Pass | MIT |
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Related
Works with
Questions about Subgrid
What does Subgrid do?
A skill your agent uses 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…. Subgrid is an agent skill from thedaviddias/Front-End-Checklist. Use 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.
When should I use Subgrid?
Subgrid fits situations like: reviewing card grid layouts with misaligned content areas; any nested grid where child items need to align with sibling cards corresponding sections without JavaScript intervention.
How do I install Subgrid in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a claude-code`. Or copy the skill folder (skills/subgrid in thedaviddias/Front-End-Checklist) into .claude/skills/subgrid in your project. Claude Code loads it when a task matches its description.
How do I install Subgrid in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a codex`. Or copy the skill folder (skills/subgrid in thedaviddias/Front-End-Checklist) into .agents/skills/subgrid in your project. Codex loads it when a task matches its description.
Can I use Subgrid in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill subgrid -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/subgrid, .gemini/skills/subgrid, .github/skills/subgrid and .opencode/skills/subgrid in your project.
What does Subgrid need to run?
SKILL.md names no scripts, command-line tools or credentials: Subgrid is instructions for the agent only.
Does Subgrid access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Subgrid safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Subgrid use?
Subgrid is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Subgrid use?
About 541 tokens (SKILL.md is roughly 2.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.8k tokens, read only when the agent opens those files.
What are the alternatives to Subgrid?
Skills that share tags, products or a category with Subgrid: Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Tailwindcss Development (anonaddy/anonaddy, 4.9k stars), Figma use_figma Plugin API Rules (warpdotdev/warp, 65k stars) and GSAP Core Animation (greensock/gsap-skills, 16k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Subgrid?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,412 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.