Arc

Arc is the open-source Lisp dialect Paul Graham says he worked on after reducing a larger browser-based web-app development idea in Paul Graham on Viaweb, Y Combinator, and Writing. In the episode, Graham compares the unrealized larger idea to a later Replit-like platform with elements of hosted application building, infrastructure, and code collaboration.

Arc matters less here as a programming-language history page than as a post-Viaweb fork in Graham’s work. After Robert Morris declined to work on the larger platform, Graham narrowed the project to a language, showing how a product idea can shrink into a technical artifact when the right cofounder or operating context is missing.

Connections

• Paul Graham and Robert Morris - people connected to the unrealized platform and Arc path.
• Viaweb and Web-Based Software - prior browser-software context.
• Post-Acquisition Founder Identity - broader question of what a founder does after exit.