langfuse

Features

• Observability: Instrument LLM calls, retrieval, embeddings, and agent actions to trace and debug application logs.
• Prompt Management: Centralized version‑controlled prompt repository with client/server caching for low‑latency iteration.
• Evaluations: Supports LLM‑as‑judge, code evaluators, user feedback, manual labeling, and custom evaluation pipelines.
• Datasets: Manage test sets and benchmarks; integrate with frameworks like LangChain and LlamaIndex for continuous improvement.