YUNAHS / PRODUCT & PROJECT

From a workflow problem
to an app plan.

YUNAHS is an independent development project based in Seoul, South Korea. Our first product, YUNAHS Brief, helps adults and small teams define an app before they start building it.

Try the live prototype →

Project at a glance

Project name: YUNAHS
Product: YUNAHS Brief / Brief Studio
Operator & independent developer: 윤영조
Location & initial audience: Seoul, South Korea · adult users in South Korea
Public prototype launch: October 8, 2026 · a product milestone, not a business registration or incorporation date
Stage: Live, free prototype · AI integration planned
Contact: hello@yunahs.com

What works today

The live prototype runs in the browser without an account. Describe a problem, identify the audience, and select one to three features. Each selection changes the proposed screens, input fields, processing rules, completion criteria, and review questions.

Four planning directions: workflow automation, online selling, new services, and information search.
Twenty feature specifications connected to editable briefs and screen flows.
Immediate updates when feature selections change, with protection for manually edited documents.
Copy and Markdown export for further planning and development.

This is a rule-based planning prototype. It does not execute the proposed app features, process uploaded business files, or call Claude. Inputs are processed in the browser and are not submitted to a server by the tool.

What we plan to build with Claude

We plan to integrate the Claude API to ask focused clarification questions, turn answers into structured requirements, and help users review an initial app plan. Users will remain responsible for confirming the requirements before development.

Before releasing an AI version, we plan to implement server-side API key handling, request and cost limits, output validation, and an updated data-processing notice. These capabilities are a roadmap, not features of the current prototype.

Product walkthrough

Open Brief Studio and choose the sales-file sample.
Open step “03 범위” (Scope). Replace “결과 내보내기” (Export) with “처리 이력” (History).
Inspect “기능 상세” (Feature details), “화면 흐름” (Screen flow), and “확인 질문” (Review questions). The plan changes immediately.
Edit the brief or download it as Markdown.

Project information

YUNAHS is the name of this development project. The public launch date above identifies the prototype release; it should not be treated as a legal incorporation date. Current operating information is available in our site information.