GSAP Core Animation
greensock/gsap-skills
Covers the GSAP core API for tweens, easing, staggers, defaults and matchMedia, and when to choose GSAP over CSS animations or other JavaScript animation libraries.
Reviews React/Vue component architecture, state, and hooks. An agent skill from DanielPodolsky/ownyourcode.
Install Frontend Fundamentals
$ npx skills add DanielPodolsky/ownyourcode --skill frontend-fundamentals -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install DanielPodolsky/ownyourcode frontend-fundamentals --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/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .claude/skills/frontend-fundamentals && 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 "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .claude/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontendType 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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install DanielPodolsky/ownyourcode frontend-fundamentals --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .agents/skills/frontend-fundamentals && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .agents/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install DanielPodolsky/ownyourcode frontend-fundamentals --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .cursor/skills/frontend-fundamentals && 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 "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .cursor/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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/DanielPodolsky/ownyourcode.git --path .claude/skills/fundamentals/frontend--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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install DanielPodolsky/ownyourcode frontend-fundamentals --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .gemini/skills/frontend-fundamentals && 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 "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .gemini/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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 DanielPodolsky/ownyourcode frontend-fundamentalsInstalls 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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .github/skills/frontend-fundamentals && 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 "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .github/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install DanielPodolsky/ownyourcode frontend-fundamentals --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/DanielPodolsky/ownyourcode.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/fundamentals/frontend .opencode/skills/frontend-fundamentals && 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 "frontend-fundamentals" agent skill from https://github.com/DanielPodolsky/ownyourcode/tree/main/.claude/skills/fundamentals/frontend into .opencode/skills/frontend-fundamentals/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "frontend-fundamentals", 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
frontend-fundamentals- GitHub stars
- 290
- Used in
- 1 other repo
- Token cost
- ~874 tokens
- SKILL.md length
- 322 words
- Files
- 1
- Skills in repo
- 19
- Repo updated
- First seen
- Licence
- MIT
At a glance
Reviews React/Vue component architecture, state, and hooks. An agent skill from DanielPodolsky/ownyourcode.
- Works in 4 steps: God Components → Logic in Render → Prop Drilling → …
- Junior builds components
- SKILL.md covers When to Apply, Review Checklist, Common Mistakes (Anti-Patterns) and Socratic Questions, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Frontend Fundamentals is an agent skill from DanielPodolsky/ownyourcode. Reviews React/Vue component architecture, state, and hooks. Use when junior builds components, forms, modals, uses useState, useEffect, adds state, or asks "is this good React".
Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Frontend & Design. It works with React and Vue.js. The repository describes itself as: Claude Code workflow for AI-mentored development. Work efficiently with Spec-Driven Development and the 6 Gates. Built to fight cognitive offloading — for developers using AI to… The licence is MIT.
When your agent uses it
- Junior builds components
- Asks is this good React
Example prompts
- “is this good React”
- “Use the frontend-fundamentals skill to review React/Vue component architecture, state, and hooks. An agent skill from DanielPodolsky/ownyourcode”
- “/frontend-fundamentals”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit bd1f17c. 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
No URLs in SKILL.md.
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
Frontend Fundamentals loads about 874 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 322 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 DanielPodolsky/ownyourcode at commit bd1f17c, republished under its MIT licence (© DanielPodolsky). 322 words, ~874 tokens.
Download SKILL.mdSave it as
.claude/skills/frontend-fundamentals/SKILL.md (or your agent's skills folder).- name
- frontend-fundamentals
- description
- Reviews React/Vue component architecture, state, and hooks. Use when junior builds components, forms, modals, uses useState, useEffect, adds state, or asks "is this good React".
Frontend Fundamentals Review
"A component should do ONE thing well. If you're describing it with 'and', split it."
When to Apply
Activate this skill when reviewing:
- React/Vue/Svelte components
- UI rendering logic
- State management code
- CSS/styling decisions
- Client-side routing
Review Checklist
Component Architecture
- Single Responsibility: Does each component do ONE job?
- Size Check: Is the component under 200 lines?
- Props Count: Are there fewer than 7 props?
- Naming: Can you describe the component without saying "and"?
State Management
- Colocation: Is state as close as possible to where it's used?
- Lifting: Is state shared properly between siblings via parent?
- Context vs Props: Is prop drilling avoided (max 3 levels)?
- Server State: Is server data managed separately (React Query/SWR)?
Performance
- Memoization: Are expensive computations wrapped in useMemo?
- Callbacks: Are event handlers wrapped in useCallback where needed?
- Re-renders: Will this cause unnecessary re-renders?
- Lazy Loading: Are heavy components code-split?
Accessibility
- Semantic HTML: Are proper elements used (button vs div)?
- ARIA: Are interactive elements accessible?
- Keyboard: Can users navigate without a mouse?
Common Mistakes (Anti-Patterns)
1. God Components
❌ UserDashboard.tsx (1000 lines)
- fetches data, manages state, renders UI, handles routing
✅ Split into:
- UserDashboardPage.tsx (container)
- UserStats.tsx (presentation)
- UserActivity.tsx (presentation)
- useUserData.ts (hook)2. Logic in Render
❌ return <div>{users.filter(u => u.active).map(u => ...)}</div>
✅ const activeUsers = useMemo(() => users.filter(u => u.active), [users]);
return <div>{activeUsers.map(u => ...)}</div>3. Prop Drilling
❌ <App user={user}>
<Layout user={user}>
<Main user={user}>
<Widget user={user} />
✅ const user = useUser(); // in Widget.tsx4. Boolean Prop Soup
❌ <Button primary secondary large small disabled loading />
✅ <Button variant="primary" size="large" state="loading" />Socratic Questions
Ask the junior these questions instead of giving answers:
- Architecture: "What is the ONE job of this component?"
- Splitting: "If I asked you to use just the header part elsewhere, could you?"
- State: "Who needs this data? Should it live here or higher up?"
- Performance: "What happens when the parent re-renders?"
- Complexity: "Could a new developer understand this in 5 minutes?"
Standards Reference
See detailed patterns in:
/standards/frontend/component-architecture.md
Red Flags to Call Out
| Flag | Question to Ask |
|---|---|
| File > 200 lines | "Can we split this into smaller pieces?" |
| > 5 useState calls | "Should some of this state be lifted or combined?" |
| useEffect with [] deps but uses external values | "Are we missing dependencies?" |
| Direct DOM manipulation | "Is there a React way to do this?" |
| Inline styles everywhere | "Should we use a consistent styling approach?" |
© DanielPodolsky, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .claude/skills/fundamentals/frontend of DanielPodolsky/ownyourcode.
Open the folder on GitHubat commit bd1f17c
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in DanielPodolsky/ownyourcode, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Frontend Fundamentals 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 |
|---|---|---|---|---|---|---|
| Frontend Fundamentals this skillDanielPodolsky/ownyourcode | 290 | 1 repos | ~874 | Automated safety check: Pass | MIT | |
| GSAP Core Animationgreensock/gsap-skills | 16k | 3 repos | ~3.7k | Automated safety check: Pass | MIT | |
| Boneyard0xGF/boneyard | 7.5k | — | ~2.2k | Automated safety check: Notes | MIT | |
| Kill AI Slopyetone/kill-ai-slop | 1.3k | — | ~1.4k | Automated safety check: Pass | Apache-2.0 | |
| Formkitformkit/formkit | 4.8k | — | ~1.7k | Automated safety check: Pass | MIT | |
| Localization Toolkitzebbern/claude-code-guide | 4.7k | 1 repos | ~1.3k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Frontend Fundamentals
What does Frontend Fundamentals do?
Reviews React/Vue component architecture, state, and hooks. An agent skill from DanielPodolsky/ownyourcode. Frontend Fundamentals is an agent skill from DanielPodolsky/ownyourcode. Reviews React/Vue component architecture, state, and hooks.
When should I use Frontend Fundamentals?
Frontend Fundamentals fits situations like: junior builds components; asks is this good React.
How do I install Frontend Fundamentals in Claude Code?
Run `npx skills add DanielPodolsky/ownyourcode --skill frontend-fundamentals -a claude-code`. Or copy the skill folder (.claude/skills/fundamentals/frontend in DanielPodolsky/ownyourcode) into .claude/skills/frontend-fundamentals in your project. Claude Code loads it when a task matches its description.
How do I install Frontend Fundamentals in Codex?
Run `npx skills add DanielPodolsky/ownyourcode --skill frontend-fundamentals -a codex`. Or copy the skill folder (.claude/skills/fundamentals/frontend in DanielPodolsky/ownyourcode) into .agents/skills/frontend-fundamentals in your project. Codex loads it when a task matches its description.
Can I use Frontend Fundamentals 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 DanielPodolsky/ownyourcode --skill frontend-fundamentals -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/frontend-fundamentals, .gemini/skills/frontend-fundamentals, .github/skills/frontend-fundamentals and .opencode/skills/frontend-fundamentals in your project.
What does Frontend Fundamentals need to run?
SKILL.md names no scripts, command-line tools or credentials: Frontend Fundamentals is instructions for the agent only.
Does Frontend Fundamentals access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Frontend Fundamentals 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 Frontend Fundamentals use?
Frontend Fundamentals 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 Frontend Fundamentals use?
About 874 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Frontend Fundamentals?
Skills that share tags, products or a category with Frontend Fundamentals: GSAP Core Animation (greensock/gsap-skills, 16k stars), Boneyard (0xGF/boneyard, 7.5k stars), Kill AI Slop (yetone/kill-ai-slop, 1.3k stars) and Formkit (formkit/formkit, 4.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Frontend Fundamentals?
DanielPodolsky (a GitHub user) maintains it in DanielPodolsky/ownyourcode, which has 290 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on June 27, 2026.
Source: DanielPodolsky/ownyourcode on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.