Hi, I'm Marcus Chang 👋

Building AI agents and developer tooling · SF Bay Area

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🚀 My Top Projects

Agent Tutorial

• learn-agent-architecture : Learn AI agents from scratch.
• learn-deepseek-harness : Everything is a plugin: rebuild DeepSeek Harness from scratch.

Agent Engine

• Leeway : A workflow-driven AI agent framework that executes YAML-defined decision trees.

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🌱 Open Source Contributions

• CocoIndex : 4 merged PRs · Runtime reliability, error handling, Python/Rust interop
• learn-claude-code : 5 merged PRs · Build a Claude Code–style agent harness from scratch
• Promptfoo : 1 merged PR · Fixed glob expansion for single-string test configurations