biz-health-check

biz-health-check is a Korean-language business due-diligence skill that takes a single business registration number (사업자등록번호), optionally with a company name and region, and cross-checks six free Korean public-data sources into one factual report. It answers the practical question "is this business actually sound?" by pulling National Tax Service registration status (active/suspended/closed), National Pension enrolled-workplace data (headcount and monthly dues), the tax-delinquency public list, Financial Services Commission corporate profile, Public Procurement Service sanctioned-supplier records, and local-government business-license operating status. By design it produces no score, grade, or "risk" judgment — it lays out only facts, sources, and query timestamps, leaving interpretation to the user.

The catalogue entry itself is a thin CLI stub: the real instructions are fetched at runtime via `npx -y @nomadamas/k-skill@0 instruct biz-health-check`, which detects the runtime and prints current instructions, with helper files listed by a companion command. It reuses the repo's six single-purpose skills as the single source of truth, degrading gracefully — if one section fails or its helper is missing, only that section is marked unavailable while the rest proceed. Some sections run directly without authentication (delinquency, licenses); others go through a hosted or self-hosted `k-skill-proxy` that holds the operator's DATA_GO_KR_API_KEY, so the end user needs no secrets.

It targets Korean users vetting a counterparty, client, or vendor. Notably, its hard rules are security-conscious: never execute payment/submission/posting without explicit approval, never ask for or store plaintext credentials, and never bypass CAPTCHA, identity-proofing, or e-signature boundaries.