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Agent skill

Frontend Development

by OpenHands in OpenHands/OpenHands

This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW…

MITAuto-check passedFrontend & Design

Install Frontend Development

skills CLI
$ npx skills add OpenHands/OpenHands --skill frontend-development -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install OpenHands/OpenHands frontend-development --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/OpenHands/OpenHands.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/frontend-development .claude/skills/frontend-development && rm -rf skills-src

Use ~/.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/

Facts

Skill name
frontend-development
GitHub stars
90k
Token cost
~324 tokens
SKILL.md length
116 words
Files
2 (incl. references)
Skills in repo
8
Repo updated
First seen
Licence
MIT

At a glance

This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW…

  • Works in 6 steps: Read references/guide.md before making… → Classify every new string as localized… → Give durable state one owner and avoid… → …
  • Asks to add UI copy
  • SKILL.md covers Workflow and Reference
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Frontend Development is an agent skill from OpenHands/OpenHands. This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW mocks", or modifies React components, hooks, routes, i18n, lazy loading, persisted UI state, or shared frontend behavior.

Its SKILL.md is about 320 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/guide.md`).

It sits in Frontend & Design, covering Frontend development, Web performance and Internationalization. It works with OpenAI. The repository describes itself as: 🙌 OpenHands: AI-Driven Development. The licence is MIT.

When your agent uses it

  • Asks to add UI copy
  • Add a translation
  • Optimize the frontend bundle
  • Change onboarding

Example prompts

  • “add UI copy”
  • “add a translation”
  • “optimize the frontend bundle”
  • “/frontend-development”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Read references/guide.md before making broad or shared frontend changes.
  2. Classify every new string as localized UI copy, a named program identifier, or a constrained union tag.
  3. Give durable state one owner and avoid mirroring stores into component state.
  4. Preserve lazy-loading boundaries and avoid internal imports through library barrels.
  5. Keep MSW fixtures in production-build-visible locations and verify static mock mode with a mock-enabled build.
  6. Add focused behavioral coverage for the affected feature invariants.

What it can do on your machine

Read from SKILL.md and the folder at commit baf1cbe. 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 Development loads about 324 tokens when it runs, and up to ~6.7k if it reads all its reference files. Until then it costs about 84 tokens; SKILL.md has 116 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~84
When it runs · the whole SKILL.md, loaded when a task matches
~324
With references · SKILL.md plus every file in references/, read only if the agent opens them
~6.7k

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 OpenHands/OpenHands at commit baf1cbe, republished under its MIT licence (© OpenHands). 116 words, ~324 tokens.

Download SKILL.mdSave it as .claude/skills/frontend-development/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
frontend-development
description
This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW mocks", or modifies React components, hooks, routes, i18n, lazy loading, persisted UI state, or shared frontend behavior.

Frontend Development

Apply Canvas-specific React, TypeScript, internationalization, state ownership, mock-mode, and bundle-performance conventions.

Workflow

  1. Read references/guide.md before making broad or shared frontend changes.
  2. Classify every new string as localized UI copy, a named program identifier, or a constrained union tag.
  3. Give durable state one owner and avoid mirroring stores into component state.
  4. Preserve lazy-loading boundaries and avoid internal imports through library barrels.
  5. Keep MSW fixtures in production-build-visible locations and verify static mock mode with a mock-enabled build.
  6. Add focused behavioral coverage for the affected feature invariants.

Reference

  • references/guide.md — i18n and magic-string rules, generated files, mock mode, loading/performance budgets, lazy imports, query-key and lint constraints, plus feature-specific state and UI invariants.

© OpenHands, 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 .agents/skills/frontend-development of OpenHands/OpenHands.

  • SKILL.md
  • references/guide.md

Open the folder on GitHubat commit baf1cbe

Compare with similar skills

Frontend Development 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.

Frontend Development compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Frontend Development this skillOpenHands/OpenHands90k—~324Automated safety check: PassMIT
React Frontend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2.9kAutomated safety check: PassMIT
Jtackanner/jta133—~2.4kAutomated safety check: NotesMIT
JSON UIactionbook/actionbook1.6k—~2.7kAutomated safety check: PassApache-2.0
Eisland Dev Add Empty Setting SubpageJNTMTMTM/eIsland320—~2.3kAutomated safety check: PassGPL-3.0
Nekocap Forms I18nnopol10/nekocap105—~1.1kAutomated safety check: PassGPL-3.0

Similar skills

  • 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.

    10k GitHub starsUsed in 2 repos~2.9k tokens
    Frontend & DesignAuto-check passed

  • Jta

    ckanner/jta

    Translate JSON i18n files to multiple languages with AI-powered quality optimization.

    133 GitHub stars~2.4k tokensUpdated 11 mo ago
    Frontend & DesignAuto-check: notes

  • JSON UI

    actionbook/actionbook

    CRITICAL: Use for json-ui component rendering and development.

    1.6k GitHub stars~2.7k tokensUpdated 1 mo ago
    Frontend & DesignAuto-check passed

  • Eisland Dev Add Empty Setting Subpage

    JNTMTMTM/eIsland

    Add a new empty subpage (tab) to an existing eIsland settings section with page navigation support.

    320 GitHub stars~2.3k tokensUpdated today
    Frontend & DesignAuto-check passed

  • Nekocap Forms I18n

    nopol10/nekocap

    A skill your agent uses when building or modifying a form, binding inputs, adding validation, or adding/changing any user-facing string in the nekocap frontend.

    105 GitHub stars~1.1k tokensUpdated 5 days ago
    Frontend & DesignAuto-check passed

  • LobeHub Internationalization

    lobehub/lobehub

    Rules for adding and editing LobeHub's user-facing strings with react-i18next: flat dot-notation keys, the default locale folder, namespaces and when to run bun run i18n.

    83k GitHub stars~569 tokensUpdated today
    Frontend & DesignAuto-check passed

More from OpenHands/OpenHands

All 8 skills in this repo

  • PR Design Doc

    OpenHands/OpenHands

    For a non-trivial pull request, write a self-contained HTML design doc under the temporary .pr/ directory and link a visibility-appropriate preview in the PR description, so maintainers grasp the…

    90k GitHub stars~2.4k tokensUpdated today
    Auto-check passed

  • Verify Openhands

    OpenHands/OpenHands

    This skill should be used to "verify OpenHands features", "test the Canvas UI like a user", "drive Agent Canvas", "check a UI change in the real app", "create or update the feature map", "run the…

    90k GitHub stars~2.9k tokensUpdated today
    Auto-check passed

  • Desktop Electron

    OpenHands/OpenHands

    This skill should be used when the user asks to "change the desktop app", "package Electron", "build a universal macOS app", "bundle Node or uv", "fix Electron startup", or changes electron/…

    90k GitHub stars~302 tokensUpdated today
    Auto-check passed

  • E2E Testing

    OpenHands/OpenHands

    This skill should be used when the user asks to "add an E2E test", "run live E2E", "run mock-LLM tests", "debug Playwright CI", "test the Docker image", or changes tests/e2e, Playwright configs, E2E…

    90k GitHub stars~308 tokensUpdated today
    Auto-check passed

  • Frontend API Contracts

    OpenHands/OpenHands

    This skill should be used when the user asks to "add an API call", "change a backend", "update settings persistence", "change conversation events", "fix backend auth", "add Agent Server support", or…

    90k GitHub stars~390 tokensUpdated today
    Auto-check passed

  • Local Stack Runtime

    OpenHands/OpenHands

    This skill should be used when the user asks to "change the dev stack", "add a runtime service", "change the launcher", "update Docker", "bump Agent Server", "change ingress routing", or changes…

    90k GitHub stars~375 tokensUpdated today
    Auto-check passed

Works with

Categories

Questions about Frontend Development

What does Frontend Development do?

This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW…. Frontend Development is an agent skill from OpenHands/OpenHands. This skill should be used when the user asks to "add UI copy", "add a translation", "optimize the frontend bundle", "change onboarding", "change conversation UI", "add a query key", "change MSW mocks", or modifies React components, hooks, routes, i18n, lazy loading, persisted UI state, or shared frontend behavior.

When should I use Frontend Development?

Frontend Development fits situations like: asks to add UI copy; add a translation; optimize the frontend bundle; change onboarding.

How do I install Frontend Development in Claude Code?

Run `npx skills add OpenHands/OpenHands --skill frontend-development -a claude-code`. Or copy the skill folder (.agents/skills/frontend-development in OpenHands/OpenHands) into .claude/skills/frontend-development in your project. Claude Code loads it when a task matches its description.

How do I install Frontend Development in Codex?

Run `npx skills add OpenHands/OpenHands --skill frontend-development -a codex`. Or copy the skill folder (.agents/skills/frontend-development in OpenHands/OpenHands) into .agents/skills/frontend-development in your project. Codex loads it when a task matches its description.

Can I use Frontend Development 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 OpenHands/OpenHands --skill frontend-development -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-development, .gemini/skills/frontend-development, .github/skills/frontend-development and .opencode/skills/frontend-development in your project.

What does Frontend Development need to run?

SKILL.md names no scripts, command-line tools or credentials: Frontend Development is instructions for the agent only.

Does Frontend Development 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 Development 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 Development use?

Frontend Development 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 Development use?

About 324 tokens (SKILL.md is roughly 1.3k 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 6.4k tokens, read only when the agent opens those files.

What are the alternatives to Frontend Development?

Skills that share tags, products or a category with Frontend Development: React Frontend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars), Jta (ckanner/jta, 133 stars), JSON UI (actionbook/actionbook, 1.6k stars) and Eisland Dev Add Empty Setting Subpage (JNTMTMTM/eIsland, 320 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Frontend Development?

OpenHands (a GitHub organization) maintains it in OpenHands/OpenHands, which has 90,223 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 8, 2026.

Source: OpenHands/OpenHands on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.