Overview
An eager planning agent often produces a plausible plan before it has enough information.
That speed creates a false sense of progress. The plan may be internally coherent while solving the wrong problem, missing a critical edge case, or embedding a decision nobody consciously made.
Shared understanding reduces this form of silent misalignment. It also changes the role of later documents. A product requirements document no longer has to create the design from nothing. It only has to summarize a design that has already been discussed.