AI Agents Rebuild SaaS App in 45 Hours with Only 1 Hour of Human Steering
RealGeneKim · x · 2026-08-13
Developer kyzo participated in swyx's “SaaS killer” hackathon, successfully cloning an enterprise SaaS application using autonomous coding agents.
- Execution Efficiency: The bulk of the work was done autonomously by Claude Code in a 45-hour continuous session, also maxing out limits for Fable 5 and Codex.
- Agent Orchestration: The process spawned 183 sub-agents. Without this sub-agent optimization, token costs would have reached $4,246.
- Minimal Human Input: The developer spent only about 1 hour over 4 days steering the agents.
- Results: The generated codebase scored 100% on all provided benchmarks, with a highly praised UI.
The author noted that software development seems forever changed, though companies might still hesitate to deploy and maintain fully agent-generated software.
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