Module features 

Feature-schema access + the feature-schema → FormField mapping.

The kernel OWNS the feature definitions (feature_pipeline/schema.rs; each features/<feat>.rs declares its own schema() with an inputParamsSchema). This module reaches that catalogue from native Rust (re-exported by the kernel as brep_kernel::feature_schema_catalogue) and maps ONE feature’s parameter schema into the general FormField list the shared egui form engine renders — the SAME FormFields the settings dialog uses.

The map classifies each kernel param type:

• number → FieldKind::Scalar (unbounded drag value)
• string → FieldKind::Text (id is read-only)
• transform → three FieldKind::Vec3 (position/rotation/scale)
• boolean_operation → an FieldKind::Enum (operation) + a FieldKind::Reference (tools) + a FieldKind::Bool (mergeCoplanarFaces)
• reference_selection→ FieldKind::Reference (the #42 seam)

REFERENCE-SELECTION field types (rendered as the disabled placeholder — the seam for the next slice’s real picker): the top-level reference_selection params, and the targets list inside a boolean_operation. (transform’s optional start reference is not surfaced here yet.)

Functions

feature_catalogue

The kernel-owned feature-schema catalogue ({ version, features: [...] }).

feature_default_params

A feature type’s DEFAULT inputParams, built from its schema: one entry per inputParamsSchema param seeded with that param’s default_value (missing → null). The caller assigns the unique id afterwards (the schema’s id default is null). Additive, engine-owned, and reusable by any “add feature” path so a new feature’s params always track the kernel schema. Unknown types yield an empty object.

feature_form_fields

Map a feature type’s inputParamsSchema into the general form fields, in schema (insertion) order — the kernel builds schemas with serde_json’s preserve_order, so grouped fields stay contiguous for the group headers.

feature_long_name

Human display name for a feature type (longName, else the type itself).

feature_schema

One feature’s full schema entry, by its type / shortName (e.g. "P.CU", "B"). None if the type is not in the catalogue.

feature_short_name

A feature type’s SHORT name (shortName, e.g. P.CU, S, E), else the type code itself. This is the BASE for a new feature’s id: the engine appends the part history’s persistent global counter to it (P.CU → P.CU7, S → S8) in crate::history::History::next_feature_id.