The last two years have been perfect for accumulating tech debt.

2023 you would have probably implemented your Agents with LangChain and RAG

2025 you'd use MCP and OpenAI/Anthropic Agent SDK.

2027 you will use a workspace frameworks (Amazon, Microsoft) sensor libraries and world models.

Agents are a fantastic generational technologies, but in mid-2026 the environment they are operating in is quickly changing.

The only way forward is to stay agile, understand model and vendor risk.