Based on Microsoft’s current Copilot Studio architecture, the GitHub Copilot Harness is not just a newer UI. It is a fundamentally different orchestration runtime designed for agentic, reasoning-heavy workloads, whereas the Standard Harness remains the best choice for deterministic, process-driven conversational agents Executive Summary AreaStandard HarnessGitHub Copilot HarnessPrimary DesignRule-based conversational agentGoal-based AI agentAgent BehaviorFollows predefined…
