Vercel React Best Practices
sanity-io/sanity
React and Next.js performance optimization guidelines from Vercel Engineering.
React performance optimization guidelines from Mastra Engineering.
Install React Best Practices
$ npx skills add mastra-ai/mastra --skill react-best-practices -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mastra-ai/mastra react-best-practices --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/mastra-ai/mastra.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/react-best-practices .claude/skills/react-best-practices && 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 "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .claude/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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/mastra-ai/mastra/tree/main/.claude/skills/react-best-practicesType 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 mastra-ai/mastra --skill react-best-practices -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mastra-ai/mastra react-best-practices --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mastra-ai/mastra.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/react-best-practices .agents/skills/react-best-practices && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .agents/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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 mastra-ai/mastra --skill react-best-practices -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mastra-ai/mastra react-best-practices --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mastra-ai/mastra.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/react-best-practices .cursor/skills/react-best-practices && 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 "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .cursor/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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/mastra-ai/mastra.git --path .claude/skills/react-best-practices--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 mastra-ai/mastra --skill react-best-practices -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mastra-ai/mastra react-best-practices --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mastra-ai/mastra.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/react-best-practices .gemini/skills/react-best-practices && 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 "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .gemini/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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 mastra-ai/mastra react-best-practicesInstalls 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 mastra-ai/mastra --skill react-best-practices -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mastra-ai/mastra.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/react-best-practices .github/skills/react-best-practices && 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 "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .github/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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 mastra-ai/mastra --skill react-best-practices -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mastra-ai/mastra react-best-practices --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mastra-ai/mastra.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/react-best-practices .opencode/skills/react-best-practices && 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 "react-best-practices" agent skill from https://github.com/mastra-ai/mastra/tree/main/.claude/skills/react-best-practices into .opencode/skills/react-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-best-practices", 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
react-best-practices- GitHub stars
- 29k
- Token cost
- ~1.9k tokens
- SKILL.md length
- 781 words
- Files
- 29 (incl. references)
- Skills in repo
- 44
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
React performance optimization guidelines from Mastra Engineering.
- Tasks involving React components
- SKILL.md covers Overview, When to Apply, Priority-Ordered Guidelines and Quick Reference, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Bundle optimization
What it does
React Best Practices is an agent skill from mastra-ai/mastra. React performance optimization guidelines from Mastra Engineering. This skill should be used when writing, reviewing, or refactoring React code to ensure optimal performance patterns. Triggers on tasks involving React components, data fetching, bundle optimization, or performance improvements.
Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 30 other files, including reference files (for example `references/react-best-practices-reference.md`, `references/rules/async-parallel.md` and `references/rules/bundle-barrel-imports.md`).
It sits in Frontend & Design, covering React components and Refactoring. It works with Mastra and React. The repository describes itself as: Mastra is the modern TypeScript framework for AI-powered applications and agents.
When your agent uses it
- Tasks involving React components
- Bundle optimization
- Performance improvements
Example prompts
- “/react-best-practices”
What it can do on your machine
Read from SKILL.md and the folder at commit 4d0056f. 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
React Best Practices loads about 1.9k tokens when it runs, and up to ~26k if it reads all its reference files. Until then it costs about 79 tokens; SKILL.md has 781 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 781 words (~1,873 tokens).
“Routing and priority guide for React performance and quality, containing 27 rules across 9 categories. Rule files hold the detailed explanations, examples, review smells, and impact metrics.”
- name
- react-best-practices
Files
SKILL.md and 28 other files (references) in .claude/skills/react-best-practices of mastra-ai/mastra.
- SKILL.md
- references/react-best-practices-reference.md
- references/rules/async-parallel.md
- references/rules/bundle-barrel-imports.md
- references/rules/bundle-defer-third-party.md
- references/rules/client-request-dedupe.md
- references/rules/js-length-check-first.md
- references/rules/js-set-map-lookups.md
- references/rules/js-tosorted-immutable.md
- references/rules/rendering-animate-svg-wrapper.md
- references/rules/rendering-content-visibility.md
- references/rules/rerender-lazy-state-init.md
- references/rules/rerender-no-setstate-in-render-or-effect.md
- references/rules/rerender-no-useeffect-state-reset.md
- references/rules/rerender-no-usememo-usecallback.md
- references/rules/rerender-transitions.md
- references/rules/rerender-useeffect-function-calls.md
- references/rules/structure-complex-derived-logic.md
- references/rules/structure-component-naming.md
- … and 10 more
Open the folder on GitHubat commit 4d0056f
Compare with similar skills
React Best Practices 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 |
|---|---|---|---|---|---|---|
| React Best Practices this skillmastra-ai/mastra | 29k | — | ~1.9k | Automated safety check: Pass | Custom licence | |
| Vercel React Best Practicessanity-io/sanity | 6.4k | 129 repos | ~1.6k | Automated safety check: Pass | MIT | |
| React Best Practicesryokun6/ryos | 1.3k | — | ~2k | Automated safety check: Pass | MIT | |
| Vercel React Best Practicesgambitph/Stackable | 351 | — | ~2k | Automated safety check: Pass | MIT | |
| React Best Practicesmajiayu000/spellbook | 287 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Dify Component Writing Guidelanggenius/dify | 158k | — | ~626 | Automated safety check: Pass | Custom licence |
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Categories
Questions about React Best Practices
What does React Best Practices do?
React performance optimization guidelines from Mastra Engineering. React Best Practices is an agent skill from mastra-ai/mastra. React performance optimization guidelines from Mastra Engineering.
When should I use React Best Practices?
React Best Practices fits situations like: tasks involving React components; bundle optimization; performance improvements.
How do I install React Best Practices in Claude Code?
Run `npx skills add mastra-ai/mastra --skill react-best-practices -a claude-code`. Or copy the skill folder (.claude/skills/react-best-practices in mastra-ai/mastra) into .claude/skills/react-best-practices in your project. Claude Code loads it when a task matches its description.
How do I install React Best Practices in Codex?
Run `npx skills add mastra-ai/mastra --skill react-best-practices -a codex`. Or copy the skill folder (.claude/skills/react-best-practices in mastra-ai/mastra) into .agents/skills/react-best-practices in your project. Codex loads it when a task matches its description.
Can I use React Best Practices 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 mastra-ai/mastra --skill react-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/react-best-practices, .gemini/skills/react-best-practices, .github/skills/react-best-practices and .opencode/skills/react-best-practices in your project.
What does React Best Practices need to run?
SKILL.md names no scripts, command-line tools or credentials: React Best Practices is instructions for the agent only.
Does React Best Practices 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 React Best Practices 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 React Best Practices use?
React Best Practices has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does React Best Practices use?
About 1.9k tokens (SKILL.md is roughly 7.5k 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 24k tokens, read only when the agent opens those files.
What are the alternatives to React Best Practices?
Skills that share tags, products or a category with React Best Practices: Vercel React Best Practices (sanity-io/sanity, 6.4k stars), React Best Practices (ryokun6/ryos, 1.3k stars), Vercel React Best Practices (gambitph/Stackable, 351 stars) and React Best Practices (majiayu000/spellbook, 287 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains React Best Practices?
mastra-ai (a GitHub organization) maintains it in mastra-ai/mastra, which has 28,655 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 9, 2026.
Source: mastra-ai/mastra on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.