React Doctor
makeplane/plane
Scans React code for lint, accessibility, bundle size and architecture issues, reports a health score and checks that changes do not lower it.
A skill your agent uses when reviewing CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets.
Install Performance Budget
$ npx skills add thedaviddias/Front-End-Checklist --skill performance-budget -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist performance-budget --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/performance-budget .claude/skills/performance-budget && 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 "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .claude/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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/performance-budgetType 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 performance-budget -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist performance-budget --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/performance-budget .agents/skills/performance-budget && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .agents/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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 performance-budget -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist performance-budget --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/performance-budget .cursor/skills/performance-budget && 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 "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .cursor/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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/performance-budget--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 performance-budget -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist performance-budget --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/performance-budget .gemini/skills/performance-budget && 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 "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .gemini/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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 performance-budgetInstalls 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 performance-budget -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/performance-budget .github/skills/performance-budget && 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 "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .github/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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 performance-budget -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 performance-budget --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/performance-budget .opencode/skills/performance-budget && 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 "performance-budget" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/performance-budget into .opencode/skills/performance-budget/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-budget", 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
performance-budget- GitHub stars
- 74k
- Token cost
- ~547 tokens
- SKILL.md length
- 236 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 CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets.
- Reviewing CI configuration
- 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
- Bundle analysis workflows
What it does
Performance Budget is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets. Distinguish bundle-size budgets from runtime budgets such as Lighthouse or Core Web Vitals so teams can enforce both.
Its SKILL.md is about 550 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 sits in Frontend & Design, covering Web performance. 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 CI configuration
- Bundle analysis workflows
- Pull requests that add dependencies and assets
Example prompts
- “/performance-budget”
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
Performance Budget loads about 547 tokens when it runs, and up to ~1.8k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 236 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). 236 words, ~547 tokens.
Download SKILL.mdSave it as
.claude/skills/performance-budget/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- performance-budget
- description
- Use when reviewing CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets. Distinguish bundle-size budgets from runtime budgets such as Lighthouse or Core Web Vitals so teams can enforce both.
- metadata.category
- testing
- metadata.priority
- medium
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 25
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/testing/performance-budget
Enforce performance budgets in CI
Without automated enforcement, performance degrades gradually — each PR adds a small library, each feature adds a few KB, and within months the app that loaded in 2 seconds now takes 5. Performance budgets make regressions visible at PR time rather than after user complaints. Catching 'this PR added 200KB to the bundle' in review is far cheaper than debugging a slow production site.
Quick Reference
- Define specific thresholds: max bundle size, min Lighthouse score, max LCP time
- Fail CI when budgets are exceeded to prevent performance regressions
- Size budgets catch accidental heavy dependencies; Lighthouse budgets catch runtime regressions
- Start with loose budgets and tighten them as you optimize
- Monitor production RUM so regressions are caught after deploy, not only in CI
Check
Does this project have performance budgets defined? Check package.json and CI configuration for size or Lighthouse thresholds.
Fix
Set up bundle size limits with size-limit and Lighthouse CI assertions in the CI pipeline.
Explain
Explain performance budgets, how to choose appropriate thresholds, and how to enforce them with size-limit and Lighthouse CI.
Code Review
Inspect CI workflows, package.json, and Lighthouse or bundle-size config for explicit thresholds. Flag repos where budgets are missing, too loose to catch regressions, or unenforced on pull requests. Check whether production RUM and alerting are wired to detect regressions after release.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/testing/performance-budget
© 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/performance-budget of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Performance Budget 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 |
|---|---|---|---|---|---|---|
| Performance Budget this skillthedaviddias/Front-End-Checklist | 74k | — | ~547 | Automated safety check: Pass | MIT | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| Fixing Motion Performanceibelick/ui-skills | 9.6k | 5 repos | ~1.4k | Automated safety check: Pass | MIT | |
| GSAP Performance Tuninggreensock/gsap-skills | 16k | 3 repos | ~1k | Automated safety check: Pass | MIT | |
| React Frontend Development Guidelinesdiet103/claude-code-infrastructure-showcase | 10k | 2 repos | ~2.9k | Automated safety check: Pass | MIT | |
| Web Quality Auditaddyosmani/web-quality-skills | 2.9k | — | ~2.6k | Automated safety check: Pass | MIT |
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Fixing Motion Performance
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GSAP Performance Tuning
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Guides the agent to keep GSAP animations smooth by animating transforms and opacity, batching DOM reads and writes, and avoiding layout-heavy properties.
React Frontend Development Guidelines
diet103/claude-code-infrastructure-showcase
Guidelines for React 18 and TypeScript apps covering Suspense data fetching, lazy loading, feature folders, MUI v7 styling, TanStack Router and performance.
Web Quality Audit
addyosmani/web-quality-skills
Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing.
SEO Google
AgriciDaniel/codex-seo
Google SEO APIs: Search Console (Search Analytics, URL Inspection, Sitemaps), PageSpeed Insights v5, CrUX field data with 25-week history, Indexing API v3, and GA4 organic traffic.
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Related
Categories
Questions about Performance Budget
What does Performance Budget do?
A skill your agent uses when reviewing CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets. Performance Budget is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing CI configuration, bundle analysis workflows, or pull requests that add dependencies and assets.
When should I use Performance Budget?
Performance Budget fits situations like: reviewing CI configuration; bundle analysis workflows; pull requests that add dependencies and assets.
How do I install Performance Budget in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill performance-budget -a claude-code`. Or copy the skill folder (skills/performance-budget in thedaviddias/Front-End-Checklist) into .claude/skills/performance-budget in your project. Claude Code loads it when a task matches its description.
How do I install Performance Budget in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill performance-budget -a codex`. Or copy the skill folder (skills/performance-budget in thedaviddias/Front-End-Checklist) into .agents/skills/performance-budget in your project. Codex loads it when a task matches its description.
Can I use Performance Budget 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 performance-budget -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/performance-budget, .gemini/skills/performance-budget, .github/skills/performance-budget and .opencode/skills/performance-budget in your project.
What does Performance Budget need to run?
SKILL.md names no scripts, command-line tools or credentials: Performance Budget is instructions for the agent only.
Does Performance Budget 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 Performance Budget 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 Performance Budget use?
Performance Budget 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 Performance Budget use?
About 547 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 1.3k tokens, read only when the agent opens those files.
What are the alternatives to Performance Budget?
Skills that share tags, products or a category with Performance Budget: React Doctor (makeplane/plane, 61k stars), Fixing Motion Performance (ibelick/ui-skills, 9.6k stars), GSAP Performance Tuning (greensock/gsap-skills, 16k stars) and React Frontend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Performance Budget?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,421 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.