Components for black-box system design
Presentational components for black-box system design — blocks, ports, edges. Copy-paste components you own, not a library you depend on. One presentational core, two canvas hosts.
Port
A circle with a text slot. Four states, six text layouts, three diameters.
Block
Container, header band, glyph, text slots, chip. The icon rides the title rung at 0.9×.
Two hosts
The same core wrapped for React Flow and tldraw. The core imports neither.