After the Turn 0 plan, the PyranaHarness procedure runs an iterative native tool-calling loop in which the LLM emits tool calls, tools are executed, observations are collected, and the cycle repeats until completion.

"Native tool calling loop: LLM emits tool_calls → execute tools → observe → repeat"

— PYRANA_Internal_Knowledge_Graph_Specification.md

"executing a Turn 0 plan followed by iterative tool calling loops"

— PYRANA_Internal_Knowledge_Graph_Specification.md

"until the agent finalizes an AgentOutputEnvelope"

— PYRANA_Internal_Knowledge_Graph_Specification.md