Spillwave Solutions Spillwave Guides

Building with Langfuse

A 11-part guide. Start at Part 1, or jump to any part below.

The parts

  1. The Ticket You Cannot Reconstruct Is Why You Need Langfuse
  2. Langfuse Traces Are a Typed Tree, Not a Folder of Logs
  3. Your Trace Tree Is the API Your Evaluators Will Call
  4. Your Langfuse Trace Has No Customer. That Is Why You Cannot Query It.
  5. Langfuse Does Not Run Your Agent. It Wraps the One You Already Have.
  6. Stop Shipping Prompt Wording in a Pull Request
  7. You Changed the Prompt Without a Deploy. You Still Cannot Tell If the Reply Is Any Good.
  8. The Playground Looked Fine. That Is Not a Langfuse Experiment.
  9. One Trace Tells You What Happened. Langfuse Metrics Tell You What It Costs.
  10. Your Langfuse Traces Are Already Yours. Here Is How You Get Them Out.
  11. Your Langfuse Traces Are Customer Data. Mask Them Before They Leave.