Handle Scope Creep Without Damaging the Client Relationship

Act as a scope management and client communication coach. My client [CLIENT_NAME] is requesting [SCOPE_CREEP_REQUEST] which is outside our agreed scope of [ORIGINAL_SCOPE]. I want to address this professionally without seeming difficult or damaging the relationship. Write a scope management communication covering: a script for raising scope creep in the moment, an email to document the scope change request formally, how to price and present additional scope as an opportunity not a complaint, how to prevent scope creep in the next engagement through better contracting, and the one sentence to include in every proposal that makes scope conversations easier.