The manifest

pdm-generator.json sits in the generator's directory. The PDM checks it when it syncs, and checks every run's parameters against it.

Field	What it is
schema, schemaVersion	"pdm-generator", "1.0.0"
name, description	Shown in the PDM
runtime	"node". Other languages are planned
entry	The file whose default export is the generator
parameters	The form, in order. See below
outputs	What a run makes: exactly one { "key": …, "kind": "part" } or "assembly"

A parameter:

Field
name	What the code gets it as, in params
label	What the form says. The name if you leave it out
type	number, integer, boolean, string or enum
default	Required, so every run has every value
min, max	For numbers
values	For enum: the choices
unit	Shown next to the field, mm or deg for example. Nothing is converted: the code gets what was typed

The key of an output is part of what makes a result the same document again: the same parameters and the same key give the same document.