Show HN: Viaduct – Architecture change sets for AI coding agents

A developer posted Viaduct to Hacker News as a Show HN project, introducing a tool designed to help AI coding agents work with architecture change sets. The project was shared on the platform on September 11, 2026, and is available at c4.quietgridlabs.com.

Viaduct is positioned as a way to give AI coding agents better context when dealing with architectural decisions and system changes. The tool provides structured change sets that allow these agents to understand how architecture evolves over time, rather than treating each coding request in isolation. This approach aims to improve consistency and coherence when AI systems make modifications to larger codebases that span multiple architectural domains or layers.

The Show HN framing suggests this is an early-stage project shared directly by its creator for community feedback. No funding information, team size, or commercial details are provided. The tool appears to be developer-focused infrastructure for the growing ecosystem of AI-assisted coding platforms.