Spec-driven AI orchestration is the architecture that compounds at portfolio scale, not prompt engineering. The infrastructure shift parallels Terraform for infrastructure, declarative CI/CD, and Kubernetes for containers.
Blake Aber · Predicate Ventures · 2026
What is harness engineering
Anthropic's engineering team recently published work on infrastructure for long-running AI applications. Their claim: "the infrastructure around the model matters as much as the model itself."
They call this discipline harness engineering. It covers context management, tool integration, verification loops, and resilience patterns. The key insight: two products using identical LLMs can produce vastly different outcomes depending on their supporting architecture.
