Adaptive values form a dependency graph. When you read a value via GetValue(), the system checks if any dependencies have changed and recomputes if necessary.

Threading: every thread owns its ambient graph, created lazily on first use. A node belongs to the graph of the thread that created it; all reads and writes on that node must run on that thread. Cross-thread changes must be posted to the owner thread (the post machinery), never applied directly. In debug builds a direct operation on another thread's node throws.