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Blueprint of a Frontier Coding Agent

Blueprint of a Frontier Coding Agent: Inside the machinery that powers modern AI development, and why understanding it matters even if you never write a line of code

Most people using AI coding agents are focused on the model. The real leverage is in the harness — the orchestration layer that wraps the LLM and turns it into a working product. This article breaks down the twelve components that make a frontier coding agent function, explains the three levels of engineering that separate practitioners from prompt users, and shows how swapping models intelligently across orchestration, execution, and audit tiers is where the real competitive advantage lives.