Pencils Down, Notation Up (intertwingly.net)

At Rails World 2026, DHH delivered a keynote emphasizing the transformative potential of large language models (LLMs) and urged developers to embrace an optimistic view of the future. However, the keynote sparked a discussion about the balance between LLMs and frameworks like Ruby on Rails, particularly regarding the implications of code compilation targets. DHH highlighted that Rust and C++ could serve as effective compilation languages for agents, enabling deeper integration into computing architecture and suggesting a shift in how developers think about programming languages and their role in application development. The significance of this dialogue lies in the need to rethink software development practices in light of LLM capabilities. As DHH pointed out, the efficiency of communication and the clarity of intent in programming languages become essential when LLMs are involved in generating and maintaining code. The speaker demonstrated that while compiling a Rails application down to C drastically increases the codebase's complexity, using Rails maintains clearer architectural intentions and reduces the burden on LLMs. This raises critical questions about maintaining 'source of truth' in code and the need for effective notation—arguably, the focus should remain on refining high-level abstractions like Rails that facilitate more efficient interaction with LLMs.