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Software Mansion Agentic Engineering Guide

Glossary

Before we start, let us introduce a few terms that we will use a lot:

  • Model: A particular LLM, like Claude-4.6-Opus, GPT-5.3-Codex, Gemini-3.1-Pro.

  • Agent: An LLM that runs tools in a loop to achieve a goal.

  • Agent Harness: A piece of software that implements an actual agent, like Claude Code or Cursor Agent.

  • Vibe coding: When agents write code and you’re in the flow, building PoCs and MVPs, or just having fun.

  • Agentic engineering: When you use agents to develop codebases professionally, and you are responsible for the output.