Alembic builds and runs data-driven interactive diagnostics — scored assessments and branching guides — that place a visitor on an outcome and capture the result. A runtime engine plus a UI builder.

EasyFlow stores flows as versioned documents of steps and the connections between them, and runs a visitor through the live version one step at a time. Apps register their own step types.

Block types a host registers, a layout its own record keeps, and a grid a designer arranges blocks on, following keystone_ui's design.