Is the Korean Grammar Checker skill free?

Yes. The skill itself is free from DaleSeo/korean-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Korean Grammar Checker SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.

How do I install Korean Grammar Checker?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Korean Grammar Checker with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Korean Grammar Checker

Rule-based Korean proofreader: spelling, spacing, particles, punctuation with 국립국어원 citations

by DaleSeo · DaleSeo/korean-skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 18, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 30, 2026 · a789720

⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 18, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.

Ran a Korean tech paragraph seeded with 되요, 좋는지, 이해할수있어야, 사용하든, 세션이였어요 plus a middle-dot list 쿠키·세션·JWT. The no-skill baseline caught the everyday errors but accepted the middle dots, which read as normal Korean; the skill's references/rules.md item 6 flags that exact pattern (independent alternatives take a comma, not 가운뎃점) with the 한글 맞춤법 부호 citation, so it caught an error the baseline missed and backed each fix with a rule and a confidence tier. The skill dir is self-contained: references/rules.md, common-errors.md and before/after examples all ship inside it and install cleanly. Docs match delivery with no overselling.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 5/5

What Korean Grammar Checker does

A standard-Korean grammar checker grounded in National Institute of Korean Language rules. Detects and corrects spelling (되/돼, -ㄴ지/-는지), spacing (bound nouns, auxiliary verbs), grammar (particles, tense), and punctuation errors, each with a confidence label and an educational explanation. Triggers when reviewing or proofreading Korean text, comments, or documents.

How to install Korean Grammar Checker

Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.

Commands — how to trigger Korean Grammar Checker

/grammar-checker Rule-based Korean proofreader: spelling, spacing, particles, punctuation with 국립국어원 citations

It also activates on plain-language prompts like these:

이 한국어 기술 문서 맞춤법 좀 꼼꼼히 봐줘, 특히 띄어쓰기랑 조사 사용이 걱정돼서 그래.
되요랑 돼요 중에 뭐가 맞는 표현인지 헷갈리는데, 근거랑 같이 확인해줄 수 있어?
이 보고서에 나오는 한국어 문법이랑 조사 사용, 쉼표랑 가운뎃점까지 다 교정해줄래?

Frequently asked questions

Is the Korean Grammar Checker skill free?: Yes. The skill itself is free from DaleSeo/korean-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Korean Grammar Checker work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 18, 2026. Verdict: Tested · Works. Ran a Korean tech paragraph seeded with 되요, 좋는지, 이해할수있어야, 사용하든, 세션이였어요 plus a middle-dot list 쿠키·세션·JWT. The no-skill baseline caught the everyday errors but accepted the middle dots, which read as normal Korean; the skill's references/rules.md item 6 flags that exact pattern (independent alternatives take a comma, not 가운뎃점) with the 한글 맞춤법 부호 citation, so it caught an error the baseline missed and backed each fix with a rule and a confidence tier. The skill dir is self-contained: references/rules.md, common-errors.md and before/after examples all ship inside it and install cleanly. Docs match delivery with no overselling.
What is the Korean Grammar Checker SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 5/5.
How do I install Korean Grammar Checker?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Korean Grammar Checker with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.