data-building-ledger

data-building-ledger is a skill for Claude Code from modu-ai/moai-cowork. It costs 456 tokens per session (3,372 once invoked), scanned A, original, Apache-2.0.

A lookup service for South Korean building-register and permit data from the Ministry of Land's BuildingHUB. It can show a property's use, structure, size, approval date, parking, seismic information, public-price history, age, demolition, and permits.

In plain words
What is it for?
Use it to review one building or lot, compare buildings in a neighborhood, find older properties, examine demolition and permit pipelines, and support property or development research.
Why use it?
It brings together building facts and local statistics that are otherwise spread across public records, helping you check what a property is and what may happen around it.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the moai-analyst plugin — 7 skills, 2 agents shipped together

Good fit Use it to review one building or lot, compare buildings in a neighborhood, find older properties, examine demolition and permit pipelines, and support property or development research.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/modu-ai/moai-cowork/data-building-ledger
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add modu-ai/moai-cowork --skill data-building-ledger
Clone the repo
git clone --depth 1 https://github.com/modu-ai/moai-cowork

Made for: Claude Code.

Or install moai-analyst, the plugin that ships this one along with the rest of its 7 skills, 2 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for data-building-ledger

README.md
[![agentmods](https://agentmods.dev/badge/skills/modu-ai/moai-cowork/data-building-ledger/github.svg)](https://agentmods.dev/skills/modu-ai/moai-cowork/data-building-ledger)
Your own site
<a href="https://agentmods.dev/skills/modu-ai/moai-cowork/data-building-ledger"><img src="https://agentmods.dev/badge/skills/modu-ai/moai-cowork/data-building-ledger/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for data-building-ledger

Your own site · 80×15
<a href="https://agentmods.dev/skills/modu-ai/moai-cowork/data-building-ledger"><img src="https://agentmods.dev/badge/skills/modu-ai/moai-cowork/data-building-ledger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 456 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,372 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00456 $0.03372
Opus 5 $0.00228 $0.01686
Sonnet 5 $0.00091 $0.00674
Haiku 4.5 $0.00046 $0.00337

Measured 7d ago against content hash 9c463fa8a424, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

data-building-ledger scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/moai-analyst/skills/data-building-ledger/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

국토교통부 건축HUB 조회 (data-building-ledger)

역할

국토교통부 건축HUB의 건축물대장·건축인허가·주택인허가 데이터를 기반으로 한 필지·동 단위의 건축물 실체 정보를 조회하는 전문가. 용도지역·주용도·구조·규모·건폐율/용적률·세대/주차·사용승인·내진·공시가격 시계열·노후도·철거멸실(석면)·인허가 파이프라인을 data.go.kr 공식 API 실측값으로 제공합니다.

본 스킬은 chrisryugj/archhub-mcp (MIT) MCP 서버(공용키 탑재 remote 커넥터, URL만 등록)를 호출합니다. 출처는 국토교통부 건축HUB(공공데이터포털 data.go.kr)이며, 결과가 없으면 [NOT_FOUND]로 환각을 차단합니다.

페르소나

페르소나 주력 도구 시나리오
공무원·공공기관 district_stats·old_buildings·demolitions·permits_pipeline 동 단위 노후도 집계, 정비·안전점검 대상 선별, 철거·공급 파이프라인
건축사·시공 building_profile·building_floors·district_stats·building_permit 용도지역·규모 규제, 층별 구성, 동네 규모 벤치마크, 인허가 이력
디벨로퍼 building_profile·district_stats·old_buildings·demolitions·permits_pipeline 노후 분포·철거·진행중 인허가로 사업성·공급 스크리닝
중개 building_profile·building_floors·price_history 매물 종합카드 + 층별 임대구성 + 공시가 추이
감정평가 building_profile·price_history·building_ledger 용도지역·면적·승인일·주차 + 공시가격 시계열

지원 도구 (archhub MCP 11개)

도구 설명
find_region 주소 키워드("광진구 자양동") → sigungu_code/bdong_code. 다른 도구 사용 전 필수 선행.
building_profile 용도지역 포함 종합카드 — 용도지역·주용도·구조·규모·건폐율/용적률·세대·주차·사용승인·내진·에너지. 한 필지 1콜 종합.
building_floors 층별 구성 스택 — 옥탑→지상→지하 각 층 용도·면적. 리모델링·용도변경·임대구성.
price_history 공시가격 시계열 — 호별 연도별 추이·총증감률·연평균상승률(CAGR). 감정평가·자산분석.
district_stats 동 단위 통계 + 규모 벤치마크 — 총괄·주용도별·연대별·노후도 분포 + 주용도별 층수·용적률·높이 중앙값. 도시계획·정비사업.
old_buildings 노후건축물 분석 — 사용승인 경과연수 기준 정렬. 안전점검·정비사업 1차 선별. min_age_years 파라미터.
demolitions 철거멸실 현황 — 최근 철거순 + 석면 함유 부위 ⚠. 디벨로퍼·철거업체·공무원. since_year 파라미터.
permits_pipeline 인허가 파이프라인 — 사용승인 전 진행중 건, 착공/미착공 단계 구분. 신규 공급 파이프라인. since_year 파라미터.
building_ledger 건축물대장 10종(기본개요·총괄표제부·표제부·층별개요·전유공용면적·주택가격 등) 원천 데이터.
building_permit 건축인허가 17종(기본개요·동별·층별·대수선·철거멸실·주차장 등).
housing_permit 주택인허가 16종(기본개요·동별·부대시설·관리공동 등).

Read the full file on GitHub · 147 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago Changed 9c463fa8a424
  2. 11d ago First seen · 147 lines · 456 tokens per session scan A aa7639625a8e

Subscribe to this mod's changes

data-building-ledger is a skill published in the GitHub repository modu-ai/moai-cowork (300 stars, last pushed 7d ago), licensed Apache-2.0. It adds 456 tokens to every session and 3,372 once invoked, about $0.0023 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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