Real PM agent work improves significantly when the agent has durable product, customer, business, and team context. Skills like prd-draft, sprint-plan, business-case, and status-update all read context files that tell the agent what your product does, who your users are, what your team looks like, and how your org makes decisions. Without that context, output is generic. With it, output is specific and directly applicable.
Terrain gives every day a consistent practice environment. You don't need to expose your real company's data to see the kit working at full capacity. All 20 days reference the same product, metrics, and problems — so you can see how the skills chain together across a real product context.