九颗牙齿晒太阳 yachi666

Hi, I'm Yachi

I build small, useful software with clear domain boundaries, readable interfaces, and enough polish to make everyday workflows feel lighter.

Right now my work sits at the intersection of product engineering, support operations, reusable engineering workflows, and iOS tooling experiments.

Focus	What I care about
Product UI	Calm, scannable interfaces that help people finish real workflows
Backend systems	Java services with explicit domain behavior and maintainable boundaries
Engineering practice	Reusable prompts, specs, and automation that make repeated work easier
Prototypes	Small iOS, web, and game experiments for testing ideas quickly

Project	Why it matters	Stack
support-platform	Workspace that ties support roster products and docs together	Workspace, docs
support-roster-ui	Roster planning and operations screens with a workflow-first UI	TypeScript, React
support-roster-server	Domain service for roster behavior, shift planning, and operations rules	Java, Spring
clock-in	Lightweight time and attendance utility with practical documentation	App tooling
aws-lightsail-wireguard-vpn	Clear deployment notes for a personal VPN setup on Lightsail	AWS, WireGuard
reusable-prompts	Prompt and specification templates for repeatable engineering work	Markdown
fake-location-ios	iOS location tooling notes and implementation references	iOS
game-demo	Interactive gameplay prototype experiments	Web, game logic

Start from the user workflow, then shape the data model and interface around it.
Prefer explicit boundaries, boring automation, and documentation that survives the next handoff.
Keep prototypes small enough to learn from, but polished enough to reveal the real product questions.
Make the happy path obvious and the edge cases visible.

_{Thanks for stopping by. Good software should feel quiet, useful, and alive.}