Build fluency in the vocabulary of separating an agent's upfront planning phase from its execution phase.
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A teammate explains that an AI agent first produces an explicit, multi-step plan for how it intends to accomplish a task before taking any action, and only then hands that plan to a separate executor step that carries out each step in turn, rather than deciding what to do next one step at a time with no upfront plan. What agentic-workflow architecture is being described?
The planner-executor agent pattern splits an agent's work into two distinct phases: a planner produces an explicit, multi-step plan for accomplishing the task before any action is taken, and a separate executor then carries out each step of that plan in turn, which makes the agent's intended approach inspectable and correctable before any action runs, unlike a purely reactive agent that decides its next action one step at a time with no upfront plan to review. A DNS zone transfer is an unrelated concept about replicating name server records. This plan-first-then-execute approach is exactly why the planner-executor pattern is favored for complex, multi-step tasks where reviewing the intended approach before any action runs meaningfully reduces the risk of the agent going off track.
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During a design review, the team adopts planner-executor agent pattern for a coding agent that must refactor a large codebase across many files, specifically so the intended sequence of changes can be reviewed and corrected before any file is actually modified. Which capability does this provide?
Planner-executor agent pattern here provides an inspectable, correctable upfront plan, since the planner produces the full intended sequence of steps before the executor carries out any of them. A purely reactive agent that decides its very next action one step at a time with no visibility into what it intends to do several steps later is the alternative this avoids. This behavior is exactly why planner-executor agent pattern is favored in this kind of scenario.
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In a code review, a dev notices a coding agent decides its next file edit one step at a time with no upfront plan, so a reviewer has no way to see or correct the intended sequence of changes before the agent starts modifying files. What does this represent?
This is a missed planner-executor agent pattern-opportunity, since a planner-executor pattern would produce an inspectable upfront plan a reviewer could correct before any file is touched. A cache eviction policy is an unrelated concept about discarded cache entries. This pattern is exactly the kind of gap a reviewer flags once the tradeoffs are understood.
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An incident report shows a coding agent made a cascading series of incorrect edits across a dozen files because it decided each edit reactively with no upfront plan, and by the time the mistake was noticed several files had already been modified incorrectly. What practice would prevent this?
Adopting a planner-executor pattern so the agent produces its full intended plan for review before the executor carries out any file edit. Continuing the prior approach regardless of the risk it has already caused is exactly what led to the incident described here. This fix is the standard remedy once the root cause is confirmed.
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During a PR review, a teammate asks why the team reaches for planner-executor agent pattern instead of a purely reactive step-by-step agent with no separate planning phase. What is the reasoning?
the planner-executor pattern trades the added latency and complexity of an explicit planning phase for a reviewable, correctable plan before any action runs, while a purely reactive agent is simpler and faster to start acting but gives no visibility into its intended approach until after actions have already been taken. This is exactly why planner-executor agent pattern is favored when the task is complex or high-stakes enough that reviewing the intended approach before acting is worth the extra latency, while a purely reactive step-by-step agent with no separate planning phase remains acceptable when the task is simple and low-stakes enough that reacting one step at a time is fast and safe enough on its own.
What does the "Planner-Executor Agent Pattern Vocabulary" vocabulary exercise cover?
This exercise tests real IT vocabulary related to planner-executor agent pattern vocabulary through 5 multiple-choice questions, each built from realistic workplace sentences rather than abstract definitions.
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This exercise has 5 questions. Each one shows a real-world sentence or scenario with multiple-choice options and an explanation once you answer.
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Are these vocabulary exercises connected to other topics?
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How is this different from reading a glossary or blog article?
Exercises like this one are active recall drills — you have to choose the correct term or phrasing yourself, which builds retention faster than passively reading a definition.
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