[OSS GAP] Prompt Playground #ai #llm #prompting #devtools
Pain: Teams shipping LLM features need a cheap place to compare prompts, versions, and outputs without buying a whole eval platform. “I will start you guys can continue I am working on codepup which helps generate eComm store in 30 mins using simple prompts. CodePup ships the full suite (Auth, Catalog Management,” — reddit (https://www.reddit.com/r/saasbuild/comments/1sl7ydm/what_are_you_building/)
Why now: Small teams in 2026 are cutting tool spend and refusing extra platform debt. PromptLayer, LangSmith, Humanloop are strong products, but they are packaged for bigger companies than AI product team and other small teams. That makes a smaller, self-hosted wedge in prompt playground unusually easy to explain.
Tiny wedge: Prompt versions for AI product team and other small teams without PromptLayer-style pricing and platform weight.
Why this wins: Replaces recurring PromptLayer spend with a boring self-hosted alternative for AI product team and other small teams.
Scope cut: Skip agent framework and full observability suite in v1.
Stack: Node.js + Express + SQLite + Provider adapters.