false = bypassed (a pass-through; its output port still exists).
The processor's role (eq, gate, insert, fader, …) — structural, never written.
An insert slot's rack label (A, B, post); '' on every other kind. Structural, never
written — and load-bearing: resolveTap's Post-Insert-A / Post-Insert-B anchors
match on kind === 'insert' && label === …, so without it a client cannot resolve those two
taps from the rows and has to be told the answer.
The hosted LV2 URI; '' is an EMPTY slot — the one clear encoding this entity has.
Sort among the processors sharing this node's tapPoint, ascending. Writable, and a REAL number: dropping an FX between two others is the midpoint of their two keys, so a move is ONE write of ONE node and never a renumbering of the segment.
The TAP POINT this processor is attached to — one of the ids the model's set declares, and the AUTHORED half of the arrangement. Writable: this is the door a move goes through.
The field's codec is built from the model's own set, so OPTIONS on this row publishes
exactly the points this desk has. That is how a client learns the vocabulary instead of
carrying a copy of it, and it is why a desk with a different skeleton needs no client
change.
/channel/{kind}/{index}/chain/processors/{processorId}— one stage.