Agency work crosses briefs, design files, task boards, meetings, analytics and client approvals. The final asset survives; the reasoning often does not.
A shared history gives both sides a durable view of material changes without turning every conversation into a formal report.
A shared decision history helps agencies explain the reasoning behind work, helps clients see what was learned and makes account transitions safer for both sides.
Capture the decision after approval, not the whole debate
Record the chosen before and after, the agreed reason, owner and expected outcome. Link the brief or discussion for detail. This preserves the decision without importing every comment into the permanent record.
Make evidence visible across the relationship
Attach results and label whether they came from observation, before-and-after analysis, a controlled test or qualitative feedback. Clients can evaluate the strength of the recommendation rather than receiving a decontextualised winner claim.
Prevent repeated work across retainers and staff changes
Search prior offers, audiences, messages and campaign structures before proposing a new direction. Older negative results may still be worth revisiting, but the new plan should explain what conditions have changed.
Create a better offboarding asset
Hand back the current state, major decisions, tested ideas, open results and known constraints. A clean decision history demonstrates accumulated value and reduces the risk of the next partner unknowingly undoing intentional work.
Keep ownership explicit
Distinguish who recommended, who approved, who implemented and who will review. The aim is accountability without turning the history into a blame log.
Clear answers
Frequently asked questions
Should clients see every internal agency note?
No. Share the decision, evidence and conclusion that affect the work. Internal drafts and candid working notes can remain in the agency system.
Who owns the history after the engagement?
Agree this at the start. A client should receive the decision records needed to operate its marketing, while the agency retains its own reusable methods and confidential material.
Can the history support monthly reporting?
Yes. Filter changes and conclusions by period to explain what the team changed, what became ready to judge and which decisions follow.
Make this part of the next decision.
Diffined keeps the change, reason, evidence and conclusion together in one private history.
Try the working prototype ↗