Glossary term
Glossary term
Agentic Systems
Design of the runtime wrapper around a model, including tool routing, state, validation, retries, and telemetry.
LangGraph's StateGraph is a harness engineering construct - it wraps the LLM with state management, conditional routing, tool binding, retry logic, and checkpoint persistence, defining how the agent operates.
LlamaIndex's agent harness handles tool selection, argument parsing, tool execution, output parsing, and error recovery - teams extend it with custom retry policies and observability hooks.
A production agent platform at Uber wraps all LLM calls with a harness that enforces: max-token budgets, latency SLOs, fallback model routing, structured-output validation, and PII-scrubbing before logging.