Context without spaghetti.
Relationships tell MemState how topics depend on or relate to each other. That lets retrieval pull a small neighborhood of relevant memory instead of either guessing or dumping the whole store into a prompt.
Two ways topics connect
Extension-style links
Use when one topic naturally owns or contains the narrative of another — like a project and its milestones.
Association-style links
Use when two topics are peers that should surface together — like a customer and a contract.
How to use links well
Link sparingly and intentionally. Prefer a single strong topic with fields for small facts; promote to a linked topic when the other subject needs its own lifecycle and history.