Agent skill

Nekocap Forms I18n

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.

GPL-3.0Auto-check passedFrontend & Design

Install Nekocap Forms I18n

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a claude-code

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

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n --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/nopol10/nekocap.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .claude/skills/nekocap-forms-i18n && 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/

Paste into Claude Code

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .claude/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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

$skill-installer install https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n

Type 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.

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nopol10/nekocap.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .agents/skills/nekocap-forms-i18n && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .agents/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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.

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nopol10/nekocap.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .cursor/skills/nekocap-forms-i18n && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .cursor/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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

$ gemini skills install https://github.com/nopol10/nekocap.git --path .agents/skills/nekocap-forms-i18n

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nopol10/nekocap.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .gemini/skills/nekocap-forms-i18n && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .gemini/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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.

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n

Installs 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).

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/nopol10/nekocap.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .github/skills/nekocap-forms-i18n && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .github/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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.

skills CLI

$ npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install nopol10/nekocap nekocap-forms-i18n --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nopol10/nekocap.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/nekocap-forms-i18n .opencode/skills/nekocap-forms-i18n && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "nekocap-forms-i18n" agent skill from https://github.com/nopol10/nekocap/tree/master/.agents/skills/nekocap-forms-i18n into .opencode/skills/nekocap-forms-i18n/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nekocap-forms-i18n", 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: nekocap-forms-i18n
GitHub stars: 105
Token cost: ~1.1k tokens
SKILL.md length: 371 words
Files: 1
Skills in repo: 5
Repo updated: Oct 3, 2026
First seen: Oct 7, 2026
Licence: GPL-3.0

At a glance

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.

Modifying a form
SKILL.md covers Forms — react-hook-form + antd, Validation source of truth, i18n — next-i18next and The English string IS the key, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Adding validation

What it does

Nekocap Forms I18n is an agent skill from nopol10/nekocap. Use when building or modifying a form, binding inputs, adding validation, or adding/changing any user-facing string in the nekocap frontend. Triggers on tasks like "add a form", "add a text field", "show a label", or "add a translation key".

Its SKILL.md is about 1.1k 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, covering Internationalization, Translation and React components. It works with Ant Design. The repository describes itself as: Browser extension for creating & uploading community captions for YouTube, niconico and other video sharing sites. The licence is GPL-3.0.

When your agent uses it

Modifying a form
Adding validation
Adding/changing any user-facing string in the nekocap frontend
Tasks like add a form

Example prompts

“add a form”
“add a text field”
“show a label”
“/nekocap-forms-i18n”

What it can do on your machine

Read from SKILL.md and the folder at commit cf47362. 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 (its code samples are typescript and json).
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

Nekocap Forms I18n loads about 1.1k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 371 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~65
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

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 nopol10/nekocap at commit cf47362, republished under its GPL-3.0 licence (© nopol10). 371 words, ~1,067 tokens.

Download SKILL.mdSave it as .claude/skills/nekocap-forms-i18n/SKILL.md (or your agent's skills folder).

name: nekocap-forms-i18n
description: Use when building or modifying a form, binding inputs, adding validation, or adding/changing any user-facing string in the nekocap frontend. Triggers on tasks like "add a form", "add a text field", "show a label", or "add a translation key".

This skill covers two tightly coupled concerns: form handling (react-hook-form + antd via Controller) and i18n (next-i18next, English-string-as-key).

Forms — react-hook-form + antd

Never bind a raw <input> to a form. Every input is an antd component wrapped in react-hook-form's Controller:

import { Controller, useForm } from "react-hook-form";
import { Input, Select } from "antd";

type FormShape = { displayName: string; language: string };

export const ProfileForm = () => {
  const { control, handleSubmit } = useForm<FormShape>();

  const onSubmit = (data: FormShape) => { /* ... */ };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        control={control}
        name="displayName"
        render={({ field }) => <Input {...field} />}
      />
      <Controller
        control={control}
        name="language"
        render={({ field }) => <Select {...field} options={LANGUAGES} />}
      />
      <button type="submit">{t("Save")}</button>
    </form>
  );
};

Canonical reference: src/common/feature/login/containers/new-profile-form.tsx.

Validation source of truth

Validation rules go into the Controller's rules prop, not antd's Form.Item rules. react-hook-form is the source of truth; antd's form layer is bypassed for state. (You can still use antd's Form.Item for layout/error display, just don't put validation there.)

i18n — next-i18next

Every user-facing string goes through useTranslation("common"). No bare string literals in JSX, no alt= / title= / placeholder= strings hardcoded.

import { useTranslation } from "next-i18next";

const { t } = useTranslation("common");
return <WSButton>{t("Save")}</WSButton>;

The English string IS the key

Translation keys are the English string verbatim. Add new keys only to public/locales/en/common.json:

json

{
  "Save": "Save",
  "Display name": "Display name",
  "Hello {{name}}": "Hello {{name}}"
}

The other 8 locales (es-ES, fa-IR, fr-FR, ja-JP, pt-BR, vi-VN, zh-TW, zh-CN) live alongside en/. Leave new keys missing in non-English locales — translators fill them in. Don't guess translations.

Interpolation

Use named placeholders, never string concatenation:

t("Hello {{name}}", { name }); // ✅
t("Hello ") + name;             // ❌ — fragments can't be translated

For pluralization use i18next's _one / _other suffixes if you need it; check the existing locale files first to see whether the project already uses plurals.

Extension `_locales/` vs `public/locales/`

extension-statics/_locales/ (Chrome messages.json format) is for manifest-visible strings only — the extension name, description, and toolbar tooltip that Chrome shows in the extension store and browser chrome. Almost all extension UI uses the same public/locales/ setup as the web app. Don't duplicate strings across both.

Show full SKILL.md (139 more words)Show less

When you change X, also check Y

If you change…	Also verify…
Add a new locale key	Added to `public/locales/en/common.json`, not elsewhere
Change an English string	The key changes too (key = English string), so all references and other locales need to be updated or accept fallback
Rename a form field	`useForm<FormShape>` type updated and matching `Controller` `name` props updated
Add a new form	`react-hook-form` + `Controller` + antd input — no bare `<input>`

Anti-patterns

Don't bind a raw <input> to a form. Do use Controller wrapping an antd Input / Select.
Don't write inline strings in JSX. Do wrap them in t("...").
Don't concatenate translated fragments. Do use {{name}} interpolation.
Don't add translations to non-English locales by hand. Leave them missing.
Don't add UI strings to extension-statics/_locales/. That's for the manifest only.
Don't put validation rules in antd's Form.Item. They go in Controller.rules.

Files

Just SKILL.md in .agents/skills/nekocap-forms-i18n of nopol10/nekocap.

Open the folder on GitHubat commit cf47362

Compare with similar skills

Nekocap Forms I18n 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.

Nekocap Forms I18n compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Nekocap Forms I18n this skillnopol10/nekocap	105	—	~1.1k	Automated safety check: Pass	GPL-3.0	7 days ago
Frontend DevelopmentOpenHands/OpenHands	90k	—	~324	Automated safety check: Pass	MIT	today
I18nerupts/erupt-web	116	—	~706	Automated safety check: Pass	Apache-2.0	today
JSON UIactionbook/actionbook	1.6k	—	~2.7k	Automated safety check: Pass	Apache-2.0	1 mo ago
Eisland Dev Add Empty Setting SubpageJNTMTMTM/eIsland	320	—	~2.3k	Automated safety check: Pass	GPL-3.0	yesterday
Kibana I18nelastic/kibana	21k	—	~2.5k	Automated safety check: Pass	Custom licence	today

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Works with

Ant Design

Questions about Nekocap Forms I18n

What does Nekocap Forms I18n do?

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. Nekocap Forms I18n is an agent skill from nopol10/nekocap. Use when building or modifying a form, binding inputs, adding validation, or adding/changing any user-facing string in the nekocap frontend.

When should I use Nekocap Forms I18n?

Nekocap Forms I18n fits situations like: modifying a form; adding validation; adding/changing any user-facing string in the nekocap frontend; tasks like add a form.

How do I install Nekocap Forms I18n in Claude Code?

Run `npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a claude-code`. Or copy the skill folder (.agents/skills/nekocap-forms-i18n in nopol10/nekocap) into .claude/skills/nekocap-forms-i18n in your project. Claude Code loads it when a task matches its description.

How do I install Nekocap Forms I18n in Codex?

Run `npx skills add nopol10/nekocap --skill nekocap-forms-i18n -a codex`. Or copy the skill folder (.agents/skills/nekocap-forms-i18n in nopol10/nekocap) into .agents/skills/nekocap-forms-i18n in your project. Codex loads it when a task matches its description.

Can I use Nekocap Forms I18n 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 nopol10/nekocap --skill nekocap-forms-i18n -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nekocap-forms-i18n, .gemini/skills/nekocap-forms-i18n, .github/skills/nekocap-forms-i18n and .opencode/skills/nekocap-forms-i18n in your project.

What does Nekocap Forms I18n need to run?

SKILL.md names no scripts, command-line tools or credentials: Nekocap Forms I18n is instructions for the agent only.

Does Nekocap Forms I18n 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 Nekocap Forms I18n 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 Nekocap Forms I18n use?

Nekocap Forms I18n is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Nekocap Forms I18n use?

About 1.1k tokens (SKILL.md is roughly 4.3k 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 Nekocap Forms I18n?

Skills that share tags, products or a category with Nekocap Forms I18n: Frontend Development (OpenHands/OpenHands, 90k stars), I18n (erupts/erupt-web, 116 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 Nekocap Forms I18n?

nopol10 (a GitHub user) maintains it in nopol10/nekocap, which has 105 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 3, 2026.

Source: nopol10/nekocap on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Nekocap Forms I18n

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Forms — react-hook-form + antd

Validation source of truth

i18n — next-i18next

The English string IS the key

Interpolation

Extension _locales/ vs public/locales/

When you change X, also check Y

Anti-patterns

Files

Compare with similar skills

Similar skills

More from nopol10/nekocap

Related

Questions about Nekocap Forms I18n

Extension `_locales/` vs `public/locales/`