Prompt, Context, Harness: The Three Phases of AI Engineering
AI engineering has evolved through three compensatory phases (prompt, context, and harness), each addressing a failure the previous layer couldn't fix. Harness Engineering is the governance layer that keeps teams of agents coherent across complex, long-running tasks.
Claude Cowork
Claude Cowork marks Anthropic's pivot from chatbot to agentic AI: a productized Claude Code that plans, executes, and delegates tasks through sub-agents in a sandboxed Micro-VM environment.
Claude Skills, Commands, Agents toward a unified mission
This article traces the evolution of Claude's Skills, Commands, and Agents, analyzing the fundamental tension between intent-matching intelligence and explicit-command reliability, and arguing that their merger points toward compositional AI behavior.