
Context Engineering Our Way to Long-Horizon Agents: LangChain’s Harrison Chase
From Training Data by Sequoia Capital
January 21, 2026 · 40 min
About this episode
Harrison Chase discusses the evolution and importance of context engineering in the development of long-horizon AI agents.
Harrison Chase, cofounder of LangChain and pioneer of AI agent frameworks, discusses the emergence of long-horizon agents that can work autonomously for extended periods. Harrison breaks down the evolution from early scaffolding approaches to today's harness-based architectures, explaining why context engineering - not just better models - has become fundamental to agent development. He shares insights on why coding agents are leading the way, the role of file systems in agent workflows, and how building agents differs from traditional software development - from the importance of traces as the new source of truth to memory systems that enable agents to improve themselves over time. Hosted by Sonya Huang and Pat Grady
People in this episode
Hosts: Sonya Huang, Pat Grady
Guest: Harrison Chase
Topics covered
- AI agents
- context engineering
- long-horizon agents
- software development
- autonomous systems
- agent frameworks
Keywords
- AI
- agents
- context engineering
- LangChain
- software development
- autonomy
- file systems
- memory systems
Mentioned in this episode
Organizations: LangChain, Sequoia Capital
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