Membranes
A membrane is a computed, temporary boundary around a co-active region of a substrate. It is detected from the interaction structure that has formed there, rather than assigned in advance as a team, topic, or permission group.
Membranes make a collective state easier to read. Instead of inspecting every actor or knowledge unit separately, we can observe the region they are currently working through together: its movement, what it repeatedly encounters, and how it relates to its surroundings.
Co-attention is not agreement. A membrane says that material and actors are consequentially active together; it does not say that they share a belief, goal, or interpretation. Conflict can be as structurally important as alignment.
Overlap and scale
Membranes overlap and nest rather than partitioning the substrate into fixed clusters. One actor’s context can sit within a project region while also drawing from another region; a boundary meaningful at one scale may disappear at another.
A place to intervene
Because a membrane describes the boundary of available context, it also provides a place for reversible intervention. A system can change whether material beyond the boundary is admitted and how much detail is disclosed, then observe how the collective dynamics respond.
This shifts oversight from issuing instructions to every participant toward shaping the shared conditions under which they coordinate.