LlamaIndex Advanced Agents (Python)

LlamaIndex Advanced Agents (Python)

Last verified: 2025-11 • Source: https://github.com/run-llama/llama_index

Patterns

• Tool-augmented agents with query engines and retrievers
• Specialized agents per domain (RAG, web, code) with a router
• HITL escalation on low confidence

Router Skeleton

def route(task: str) -> str:
    if "docs" in task.lower():
        return "rag_agent"
    if "web" in task.lower():
        return "web_agent"
    return "general_agent"

Observability

• Track query latency, token usage, retriever stats; export OTEL

Recovery

• Retry transient retriever/LLM errors; dead-letter on repeated failure