Building the systems around AI agents.
Agent harnesses · developer tools · technical education · open source
- Agent Harness from Scratch — a hands-on course that evolves a single LLM call into a production-style coding agent through real failure modes, from tool runtime and verification to checkpoints, context, HITL, observability, evaluation, subagents, and durable execution.
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Build agents. Understand the harness. Share what I learn.