Agentic Context Engineering: Evolving Contexts for Self-Improving Language Models

This paper introduces Agentic Context Engineering (ACE), a novel framework designed to enhance the performance of Large Language Models (LLMs) in complex applications like agents and domain-specific reasoning by evolving their context, or "playbook." ACE addresses two key limitations of prior context adaptation methods: brevity bias (the loss of detailed domain knowledge for conciseness) and context collapse (where iterative rewriting erodes information). Through a modular process of generation, reflection, and curation, ACE builds contexts that are structured, incremental, and comprehensive, leading to superior performance on benchmarks like AppWorld and financial analysis tasks. Critically, the framework achieves significant improvements, such as a 10.6% gain on agents, while also reducing adaptation latency and cost compared to strong baselines by using localized, delta updates instead of monolithic rewrites.