For vertical AI applications, foundation models are now sufficiently intelligent. The primary challenge is no longer model capability but building the surrounding software infrastructure—tools, UIs, and workflows—that lets models perform useful work reliably and trustworthily.

AI's value is limited by the system it's built on. Simply adding an AI layer to a generic or shallow application yields poor results. True impact comes from integrating AI deeply into an industry-specific platform with well-structured data.

AI will not replace enterprise software because AI models are non-deterministic (probabilistic), while enterprise systems require deterministic (100% reliable) execution for critical functions. Enterprise software will act as the execution layer that harnesses AI's "thinking" capabilities within safe, predictable workflows.

Traditional software offers the rigid, deterministic structure ("the bones") needed for reliable systems. AI language models act as the "brain and ligaments," providing the flexibility, intelligence, and adaptability to operate around that structure. Both are required for a fully functional, intelligent system.

The success of tools like Anthropic's Claude Code demonstrates that well-designed harnesses are what transform a powerful AI model from a simple chatbot into a genuinely useful digital assistant. The scaffolding provides the necessary context and structure for the model to perform complex tasks effectively.

Performance comes from a "harness" surrounding the AI model, which includes curated data, tools, and rich context. This harness, which can be open and multi-model, is where the hard work lies—prepping the context layer so that a model's plan can execute efficiently.

An AI model alone is like a brain without a body. To become a useful agent, it needs a "harness" or "scaffolding" consisting of four key components: domain-specific knowledge, memory of past interactions, tools to take actions, and guardrails for safety.

The software layer that manages an LLM's context, actions, and outputs—termed the 'harness'—is becoming the standard architecture for AI apps, akin to the LAMP stack for web development. While the framework is consistent, its specific implementation will vary significantly across different business domains, creating opportunities for specialized value.

Judging an AI's capability by its base model alone is misleading. Its effectiveness is significantly amplified by surrounding tooling and frameworks, like developer environments. A good tool harness can make a decent model outperform a superior model that lacks such support.