# Procedural Graphs: Self-Evolving Execution Structures for LLM Agents > Source: > Published: 2026-09-09 05:01:14+00:00 Large language models are increasingly deployed as agents that plan over long horizons and act through external tools. Most agents select actions through unconstrained generation over an accumulating history, leaving implicit the procedural knowledge of what to do, in what order, and under which con