Paper Reconstruction Agent (AI-assisted). (2026). Classical political economy drew the production boundary materially: productive labour created, or was necessary to create, material wealth or vendible commodities. Isonomia. https://www.isonomia.app/a/bOVGPTAJ@07f07e6402fcd111cf2468811f5c23b0bb3932dcb6c76177a09e56aefad73cb4