Lovable

AI app builder turning prompts into full applications.

Every app generation session in Lovable is served by Modal Sandboxes, which run LLM-generated code in safe, isolated environments. As usage grew, the team added LangSmith for visibility into the agentic chain behind those sessions — including an admin-only "open prompt in LangSmith" button that pulls detailed traces — so any production session can be replayed action by action, and a spike in the monitoring charts can be traced back to the request behind it.

lovable.dev