Hankyeol Kyung
I'm an AI/agent engineer building practical systems for memory, runtime, and human-AI collaboration, systems that have to survive real workflows, not only demos.
I work on SleepHub at Asleep, on agent infrastructure, and on a markdown-first knowledge system that turns private context into a public layer.
- Ambient AI that earns its place. Building bedside and background systems that stay useful without becoming noisy.
- Agent runtime and memory. Making state, continuity, guardrails, and tool use hold up across real sessions.
- Validation surfaces. Thinking about how AI products move from internal prototypes to practical deployment, testbeds, and real users.
Three primary threads, all variations on the same question: what does it look like when AI systems become durable collaborators instead of clever demos?
SleepHub
Ambient, bedside AI for autonomous sleep coaching and tracking. Device integration, sleep analysis pipelines, and insight delivery — the anchor of my applied AI work.
Knowledge OS
A markdown-first personal operating system for memory, retrieval, and public expression. Agents operate over explicit, file-based context rather than opaque memory. This site is derived from it.
Agent infrastructure
Runtime correctness, memory continuity, and workflow tooling for human-AI collaboration. Multi-agent orchestration and guardrails encoded into the development environment itself.
Patient–family record sharing
An early exploration: a lightweight digital health layer where a patient records what a hospital visit left them with — schedules, instructions, preparation items — and chooses to share it with a family member or care companion they designate. Scoped to record sharing, preparation, and communication outside the hospital.
- 01 Demo-shaped doesn't scale.
The interesting work is not "can an agent do X" but "can it do X reliably, in context, across sessions, with humans in the loop."
- 02 Memory should be explicit.
Files you can read, edit, and grep beat opaque vector stores. Plain text ages well; systems you can inspect get trusted.
- 03 Runtime is the product.
What the agent does at 3am, mid-session, after a tool error — that's the surface area that matters.