Figure 27.3: The ecosystem as six durable layers with two cross-cutting rails
Figure 27.3 The ecosystem as six durable layers with two cross-cutting rails. Strip
the brand names off any serious agent stack and these six remain, each answering
one question the earlier chapters already answered. The two rails—a surface
where a person steers, a rail that enforces and records permission—run
alongside every layer rather than living in one. The skills layer is picked out
(in accent) because it is where most builders actually add value; products churn,
but the shelves stay.
