Why Developers Using AI Are Working Longer Hours - Specs and Parallel Agents
Why Developers Using AI Are Working Longer Hours
The promise was that AI would make developers more productive and they could work less. The reality is the opposite - developers using AI tools effectively are working longer hours than ever. The work just changed shape.
Specs Are the New Code
When you have 5 agents that can implement features in parallel, the bottleneck shifts from writing code to writing specifications. A vague spec produces vague code. A detailed spec with clear acceptance criteria, edge cases, and architectural constraints produces working features.
Writing a good spec takes time. For a complex feature, a proper specification can take 2-3 hours - describing the behavior, listing edge cases, defining error handling, specifying the interface with existing code. That is time you used to spend coding that you now spend writing.
The Parallel Agent Trap
Running 5 agents in parallel sounds like 5x productivity. But each agent needs:
- A clear, detailed spec (30-60 minutes to write)
- Regular review of its output (15-30 minutes per check)
- Integration testing with other agents' work (variable)
- Error correction and re-prompting when it goes off track (frequent)
Five parallel agents means five times the management overhead. You are effectively managing a team of junior developers who work incredibly fast but need constant supervision.
Output Quality Depends on Spec Quality
The uncomfortable truth: if you spend 30 minutes on a spec, the agent produces 30 minutes worth of thinking in its output. If you spend 3 hours on a spec, the output is dramatically better.
Developers who get the best results from AI are the ones who invest heavily in specification quality. They write longer specs, include more context, and define success criteria precisely. This takes more time, not less.
The total hours go up. The output per hour goes up more. But the dream of shorter workdays is not materializing.
Fazm is an open source macOS AI agent. Open source on GitHub.