Amazon Bedrock AgentCore introduces system-prompt optimizer to automate agent tuning
Amazon’s Bedrock AgentCore now includes a system prompt optimizer that analyzes production agent traces and a reward signal to propose and validate configuration edits. The technical post describes a reflector-based workflow (Single Agent Reflector and an experimental open-source Sub‑Agent Reflector), integration with AgentCore Observability, offline batch evaluation and online A/B testing, guardrails for promotion, and evaluation results on GEPA and MIPROv2 benchmarks.