Agent skill

LexGuard MCP Developer Guide

Developer guide for the LexGuard Korean law MCP server: layer rules, adding tools and repositories, JSON-RPC responses, law API handling, answer rules and tests.

Custom licenceAuto-check passedAgent Workflows

SKILL.md written in Korean; this summary is our English description.

Install LexGuard MCP Developer Guide

skills CLI

$ npx skills add SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a claude-code

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

GitHub CLI

$ gh skill install SeoNaRu/lexguard-mcp lexguard-mcp-dev --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/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .claude/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .claude/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev

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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a codex

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

GitHub CLI

$ gh skill install SeoNaRu/lexguard-mcp lexguard-mcp-dev --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .agents/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .agents/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a cursor

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

GitHub CLI

$ gh skill install SeoNaRu/lexguard-mcp lexguard-mcp-dev --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .cursor/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .cursor/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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/SeoNaRu/lexguard-mcp.git --path .cursor/skills/lexguard-mcp-dev

--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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a gemini-cli

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

GitHub CLI

$ gh skill install SeoNaRu/lexguard-mcp lexguard-mcp-dev --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/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .gemini/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .gemini/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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 SeoNaRu/lexguard-mcp lexguard-mcp-dev

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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .github/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .github/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .github/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -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 SeoNaRu/lexguard-mcp lexguard-mcp-dev --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/SeoNaRu/lexguard-mcp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.cursor/skills/lexguard-mcp-dev .opencode/skills/lexguard-mcp-dev && 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 "lexguard-mcp-dev" agent skill from https://github.com/SeoNaRu/lexguard-mcp/tree/main/.cursor/skills/lexguard-mcp-dev into .opencode/skills/lexguard-mcp-dev/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "lexguard-mcp-dev", 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: lexguard-mcp-dev
GitHub stars: 131
Token cost: ~1.1k tokens
SKILL.md length: 214 words
Files: 1
Skills in repo: 1
Repo updated: Aug 11, 2026
First seen: Oct 7, 2026
Licence: Custom licence

At a glance

Developer guide for the LexGuard Korean law MCP server: layer rules, adding tools and repositories, JSON-RPC responses, law API handling, answer rules and tests.

Works in 4 steps: tools/list에 툴 스키마 추가 (mcp_routes.py 내… → tools/call에 분기 추가 (tool_name 조건문) → Service 메서드 작성 (기존 SmartSearchService 패턴… → …
Adding a new MCP tool to the LexGuard server
SKILL.md covers 아키텍처 패턴, 새 MCP 툴 추가 체크리스트, 새 Repository 패턴 and MCP JSON-RPC 응답 형식, plus 5 more sections
Calls pytest

What it does

Requests flow from an MCP client to a `POST /mcp` JSON-RPC endpoint in `mcp_routes.py`, then to a service, then to a repository that calls the national law API. Routes handle JSON-RPC parsing, SSE streaming and the tool and prompt listings. Services hold business logic and may combine repositories, and each repository wraps one law API and must inherit `BaseLawRepository`. Adding a tool means adding its schema to the tools list, a branch in the tool-call handler, a service method modeled on `SmartSearchService`, and a README update.

Law API rules require `attach_api_key` for keys, cached searches for 30 minutes and cached failures for five, the four `API_ERROR_*` codes, and a call to `validate_drf_response` on every reply. Tool descriptions must forbid emoji, titles, full article quotations, definitive conclusions and exposed API links, and require hedged wording and requests for more information. The contract review tool combines a common instruction with a labor-contract add-on. Tests run with `pytest tests/ -v`, favoring pure-logic tests that need no API key. The guide is written in Korean.

When your agent uses it

Adding a new MCP tool to the LexGuard server
Writing a repository that wraps another national law API endpoint
Changing the JSON-RPC endpoint or the response formatting
Writing tests for services that run without an API key

Example prompts

“Add a new MCP tool that looks up administrative rules, following the existing service and repository pattern.”
“Write a repository for the precedent search API that inherits BaseLawRepository and uses the caches.”
“Add pytest coverage for the contract review instruction without needing a law API key.”

Requirements

Python with pytest
A key for the Korean national law information API

Workflow steps

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

tools/list에 툴 스키마 추가 (mcp_routes.py 내 tools_list 배열)
tools/call에 분기 추가 (tool_name 조건문)
Service 메서드 작성 (기존 SmartSearchService 패턴 참고)
README.md 업데이트

What it can do on your machine

Read from SKILL.md and the folder at commit 6f7da76. 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
Shell commands in SKILL.md call:
- pytest
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

LexGuard MCP Developer Guide loads about 1.1k tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 214 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~45
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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 214 words (~1,080 tokens).

name: lexguard-mcp-dev

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .cursor/skills/lexguard-mcp-dev of SeoNaRu/lexguard-mcp.

Open the folder on GitHubat commit 6f7da76

Compare with similar skills

LexGuard MCP Developer Guide 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.

LexGuard MCP Developer Guide compared with similar skills
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LexGuard MCP Developer Guide this skillSeoNaRu/lexguard-mcp	131	—	~1.1k	Automated safety check: Pass	Custom licence	1 mo ago
MCP Server Builderanthropics/skills	180k	63 repos	~2.3k	Automated safety check: Pass	Apache-2.0	today
MCP Server BuildershareAI-lab/learn-claude-code	78k	5 repos	~1.2k	Automated safety check: Pass	MIT	10 days ago
Python TestsPrefectHQ/fastmcp	28k	—	~466	Automated safety check: Pass	Apache-2.0	today
Tiger Brokers OpenAPI SDKqusong0627/QuantMind	1.7k	—	~1.4k	Automated safety check: Pass	Apache-2.0	today
Opik Online Evalcomet-ml/opik-mcp	220	—	~3k	Automated safety check: Notes	Apache-2.0	today

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Works with

Questions about LexGuard MCP Developer Guide

What does LexGuard MCP Developer Guide do?

Developer guide for the LexGuard Korean law MCP server: layer rules, adding tools and repositories, JSON-RPC responses, law API handling, answer rules and tests. py`, then to a service, then to a repository that calls the national law API. Routes handle JSON-RPC parsing, SSE streaming and the tool and prompt listings.

When should I use LexGuard MCP Developer Guide?

LexGuard MCP Developer Guide fits situations like: adding a new MCP tool to the LexGuard server; writing a repository that wraps another national law API endpoint; changing the JSON-RPC endpoint or the response formatting; writing tests for services that run without an API key.

How do I install LexGuard MCP Developer Guide in Claude Code?

Run `npx skills add SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a claude-code`. Or copy the skill folder (.cursor/skills/lexguard-mcp-dev in SeoNaRu/lexguard-mcp) into .claude/skills/lexguard-mcp-dev in your project. Claude Code loads it when a task matches its description.

How do I install LexGuard MCP Developer Guide in Codex?

Run `npx skills add SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a codex`. Or copy the skill folder (.cursor/skills/lexguard-mcp-dev in SeoNaRu/lexguard-mcp) into .agents/skills/lexguard-mcp-dev in your project. Codex loads it when a task matches its description.

Can I use LexGuard MCP Developer Guide 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 SeoNaRu/lexguard-mcp --skill lexguard-mcp-dev -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/lexguard-mcp-dev, .gemini/skills/lexguard-mcp-dev, .github/skills/lexguard-mcp-dev and .opencode/skills/lexguard-mcp-dev in your project.

What does LexGuard MCP Developer Guide need to run?

Going by SKILL.md and its folder, LexGuard MCP Developer Guide needs the command-line tools its instructions call (pytest). Our summary lists: Python with pytest; A key for the Korean national law information API.

Does LexGuard MCP Developer Guide 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 LexGuard MCP Developer Guide 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 LexGuard MCP Developer Guide use?

LexGuard MCP Developer Guide 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 LexGuard MCP Developer Guide 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 LexGuard MCP Developer Guide?

Skills that share tags, products or a category with LexGuard MCP Developer Guide: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), Python Tests (PrefectHQ/fastmcp, 28k stars) and Tiger Brokers OpenAPI SDK (qusong0627/QuantMind, 1.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains LexGuard MCP Developer Guide?

SeoNaRu (a GitHub user) maintains it in SeoNaRu/lexguard-mcp, which has 131 GitHub stars. The repository was last updated on August 11, 2026.

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

Install LexGuard MCP Developer Guide

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

MCP Server Builder

MCP Server Builder

Python Tests

Tiger Brokers OpenAPI SDK

Opik Online Eval

Nevermined Payments

Related

Questions about LexGuard MCP Developer Guide