# `Agentic.Loop.Stages.PlanBuilder`

Injects a structured plan-request prompt for :agentic_planned mode.

Only active when `ctx.mode == :agentic_planned` and `ctx.phase == :plan`.
Injected before LLMCall in the pipeline. On first call, it appends a user
message requesting structured plan output. On subsequent calls (after
revision), the feedback is already in messages so it passes through.

This is a thin prompt-engineering stage — it does not call `next` itself.
It modifies messages and lets LLMCall follow in the pipeline.

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*Consult [api-reference.md](api-reference.md) for complete listing*