Run a one-person app's marketing from a coding agent and connectors

Altbozon, the solo maker of the TransApp mobile app, spent May to September 2026 running marketing out of an AI coding agent working in a git repo. Voice and design files set rules for every post. Pillow scripts render posts in English and Portuguese, while a carousel engine and Remotion make slides and video. Of about 15 Higgsfield video clips, only 2 were usable. Through a Meta Ads MCP connector the agent built a whole campaign. A thousand views cost about $2.70, compared with $8.20 when boosting posts, about 1 in 10 viewers tapped, and a landing visit cost about 3 cents. The agent never made accounts, passwords or solved captchas. Few installs followed, and the author calls it a build log, not proof.