phoenix-observability

Open-source AI observability and evaluation platform for LLM applications with tracing, evaluation, datasets, experiments, and real-time monitoring.

For framework-agnostic agentic systems, use @tracer.agent, @tracer.chain, and @tracer.tool decorators:

For comprehensive tracing setup with OpenTelemetry, see tracing-setup.md:

Open-source AI observability platform for LLM tracing, evaluation, and monitoring. Use when debugging LLM applications with detailed traces, running evaluations on datasets, monitoring production AI systems, or setting up observability infrastructure for agentic systems. **PROACTIVE ACTIVATION**: Auto-invoke when implementing observability/tracing for LLM agents, setting up evaluation pipelines, or configuring OpenTelemetry instrumentation. **DETECTION**: Check for arize-phoenix imports, OpenTelemetry setup, or observability-related code. **USE CASES**: Debugging LLM apps, running evaluations, monitoring production systems, setting up tracing infrastructure, instrumenting agent frameworks, tracing custom agents with decorators (@tracer.agent, @tracer.chain, @tracer.tool). Source: mguinada/agent-skills.