AI BriefingEntering the Software 3.0 Era
Key point
This analyzes AI agents, the core of the Software 3.0 era, from the perspective of the existing layered architecture.
Details
The evolution of software is entering the Software 3.0 era, where intent is conveyed through natural language, after passing through Software 1.0, which writes explicit logic, and Software 2.0, which learns weights through data.
LLMs are powerful, but since they cannot read files or call APIs on their own, a Harness that helps control and utilize them is essential. Anthropic's Claude Code performs this Harness role, and its structure is remarkably similar to the existing layered architecture.
- Slash Command: acts as the Controller, the entry point for user requests
- Sub-agent: acts as the Service Layer, coordinating multiple functions
- Skills: acts as a Domain Component following the Single Responsibility Principle (SRP)
- MCP (Model Context Protocol): acts as Infrastructure/Adapter, connecting to external systems
- CLAUDE.md: acts as package.json, holding project settings
Traditional anti-patterns like God Skill or Spaghetti CLAUDE.md also appear as-is in agent design. However, the decisive difference is that agents can ask users questions through Human-in-the-Loop (HITL) in uncertain situations. This presents a new paradigm by turning exception handling in traditional software into question handling.
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Entering the Era of Software 3.0