Managing 38 Codex agents from a phone: a full app built in 5 hours for under $30
RichardsonDx · x · 2026-09-17
A developer describes building OpenPresence by managing 38 Codex agents from his phone using GPT 5.6 Luna Medium/High, with each agent in its own workspace and verification, QA and testing done autonomously.
A combination of skills keeps costs low; agents can spin up sub-agents on the HIGH tier when needed. The run has been going for 5 hours with hundreds of commits and no babysitting, costing less than $30 — his take on what a fully automated dev workflow looks like.
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