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didhd/README.md

Sanghwa Na

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I'm an engineer focused on making AI systems more useful and reliable in practice.

Currently I build developer tools and agent infrastructure. Most of my work sits at the intersection of large language models and real-world software engineering - figuring out how to make agents that actually work, fail gracefully, and compose well with existing systems.

What I'm working on

I think a lot about the gap between "demo that works" and "system you'd trust in production." Concretely, that means:

  • Foxl - a personal AI agent that sits between Claude Code and Claude Cowork. It has a UI, but it can also touch your filesystem, automate browsers, run terminals, and manage scheduled tasks. I built it because I wanted Claude to be more than a chat window but didn't want to live in the terminal either. Skills and agent harness are defined as markdown (SKILL.md), so teaching the agent a new capability is just writing a file. I use it for ~80-90% of my daily work.
  • Agent architectures - multi-agent orchestration, tool use patterns, skills and harness design, and the surprisingly hard problem of getting agents to know when they don't know something. A lot of this thinking comes from building Foxl and shipping agent solutions for customers.
  • Developer experience - I maintain Amazon Bedrock Client for Mac, a native macOS app for working with foundation models. Good tools change how people think about what's possible.
  • Applied AI patterns - RAG pipelines, document processing, intelligent routing. The kind of work where the architecture matters more than the model.

I've also built workshops on agent frameworks, agent infrastructure, and MCP-based tooling

  • mostly because I learn best by teaching.

Background

Before this, I spent ~3 years as a Solutions Architect at AWS helping teams ship AI workloads, and 5 years as a software engineer at Samsung. The through-line is building systems that hold up under real usage.

I care about clean abstractions, honest benchmarks, and software that respects the people using it.

Let's talk

If you're building with Agents and hitting the messy parts - agent reliability, evaluation, production deployment - I'm always happy to compare notes.

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  1. aws-samples/amazon-bedrock-client-for-mac aws-samples/amazon-bedrock-client-for-mac Public

    A native macOS client that brings Amazon Bedrock's AI models directly to your desktop. Access Claude Sonnet 4.5, Opus 4, and other foundation models through a clean interface designed for macOS, wi…

    Swift 430 44

  2. foxl-ai/foxl foxl-ai/foxl Public

    Foxl desktop app releases

  3. awslabs/agentcore-samples awslabs/agentcore-samples Public

    Amazon Bedrock Agentcore accelerates AI agents into production with the scale, reliability, and security, critical to real-world deployment.

    Jupyter Notebook 2.6k 1k

  4. strands-agents/samples strands-agents/samples Public

    Agent samples built using the Strands Agents SDK.

    Python 712 382

  5. aws-samples/sample-browser-order-automation-agentcore aws-samples/sample-browser-order-automation-agentcore Public

    A sample e-commerce order automation application built on Amazon Bedrock AgentCore Browser with Nova Act, Strands Agent, and Playwright MCP for secure browser automation and intelligent agent orche…

    Python 14 2

  6. aws-samples/sample-document-splitting-with-amazon-bedrock-data-automation aws-samples/sample-document-splitting-with-amazon-bedrock-data-automation Public

    JavaScript 9