My/Pref/Writing/Call coding agents AI engines

• I prefer AI engines when referring to coding-agent products such as GitHub Copilot, Claude Code, OpenAI Codex, Google Gemini and Pi. It is shorter and clearer to me than agentic harnesses.
• I picked this up from the AI Engines navigation in GitHub Agentic Workflows.
• Use harness when the surrounding runtime, tool loop, permissions or orchestration is the point. The same product can be an engine selected by a workflow and a harness around a model; the terms do not mean exactly the same thing in every context.
• This follows My/Pref/Writing/Use the simpler word.