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Dev.to
7/29/2026
Building a stateless AI observability platform on $0/month infrastructure

Building a stateless AI observability platform on $0/month infrastructure

Original: I built an AI observability platform with $0 – zero dependencies, zero ops, stateless

Short summary

A solo developer built Cognilumin, a stateless AI observability platform running on $0/month infrastructure using free-tier AI providers (Gemini, Groq, OpenRouter) with vanilla PHP and JavaScript. The platform includes an explanation tool, a topology visualizer, and an execution log tracer for AI agents. The author shares lessons on prompt engineering as infrastructure and the benefits of stateless architecture for small teams.

  • •Cognilumin: stateless AI observability platform on $0/month with zero dependencies
  • •Three tools: Illuminator, Topology Visualizer, and Execution Logs for AI debugging
  • •Key lesson: prompt engineering across multiple LLM providers required more iteration than UI work

Generated with AI, which can make mistakes.

#ai-tools#open-source#ai-agents
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