Plan-and-Execute
Separate high-level planning from step-by-step execution: one LLM call produces a structured plan, then individual executor calls carry out each step, with replanning triggered by unexpected results.
errorWhat Problem Does the Plan-and-Execute Pattern Solve?
Asking a single LLM call to simultaneously reason about goals, decompose sub-tasks, and execute actions conflates distinct cognitive responsibilities, leading to lost context, premature commitment to bad paths, and difficulty recovering from errors mid-task.
check_circleHow the Plan-and-Execute Pattern Works
Split the agent loop into two roles: a Planner LLM that receives the goal and produces an ordered list of discrete steps, and an Executor that processes each step individually (often with tool use). After each step, results are fed back to the Planner, which either confirms continuation or revises the remaining plan.
Plan-and-Execute Pattern Architecture
Rendering diagram...
Implementation by Language
Plan-and-Execute Pattern in the Real World
“A building contractor (Planner) reviews the architectural blueprints and produces a phased construction schedule: foundation, framing, electrical, finishing. Individual trade crews (Executors) carry out each phase. If an inspection fails (unexpected result), the contractor revises the remaining schedule rather than demolishing the entire building and starting over.”
Frequently Asked Questions
helpWhen should I use Plan-and-Execute instead of ReAct?
Use Plan-and-Execute for tasks with many steps that benefit from upfront planning, like multi-file code changes or research reports. Use ReAct for exploratory tasks where the next step depends on what you discover. Plan-and-Execute reduces redundant reasoning but is less adaptive.
helpHow do I handle plan failures in the Plan-and-Execute pattern?
Implement a re-planning step that triggers when a step fails or produces unexpected results. The planner receives the original plan, the completed steps, and the failure context, then generates a revised plan for the remaining work.