Want to build a domain-specific agent harness? This is a great practical guide by @sydneyrunkle on designing and building your own custom ag…

Want to build a domain-specific agent harness? This is a great practical guide by @sydneyrunkle on designing and building your own custom agent harness. Worth reading if you’re exploring agentic systems and AI-native products. https://langchain.com/blog/how-to-build-a-custom-agent-harness Either you die a system of record or you live long enough to become a domain-specific harness

I think you should build your own harness too. Build on primitives. Models come and go.
langchain create_agent is a super minimal agent harness very easy to customize with... middleware!!! as you build task-specific harnesses, g…
own your agent harness 🤝 own your intelligence 🤝 own your evals 🤝 open ecosystems this doesn’t mean start from scratch, build on an open …
here's how we're improving our base harness, you can apply these same lessons to hill-climbing for your application-specific harness!

Source: Harrison Chase (X) | 2026-09-13

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