# What Belongs in the OS

Marketing OS stores reusable methods: how to execute a launch, GTM plan, campaign, email
series, channel strategy, measurement plan, or post-project review.

It does not store active roadmaps, launch briefs, campaign concepts, current rosters,
temporary claims, prices, budgets, embargoes, or project calendars. Durable positioning
and voice may live in their product modules only after they have been ruled as canon.

Project work can change the OS when Douglas explicitly makes the learning a standard,
the pattern succeeds across multiple relevant projects, or unusually strong evidence
supports a bounded rule. Otherwise the learning stays with the project or in an optional
case.