Topology Mutation and Seat Management

The ability to change a rig while it is alive: expand, shrink, launch, remove, discover, bind, adopt, and attach seats or sessions. Seat management includes the stable identifiers, edges, roles, and startup context that make those mutations coherent.

OpenRig should be easy to reach for. A user should be able to add capacity, retire capacity, adopt an existing session, or attach a terminal without rebuilding the whole topology. If mutation is rarely tested, users avoid it and the product collapses back into static launch scripts.

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