use ocs_doc_api::{ApiResult, DocApi};

fn intersect_solids(api: &DocApi) -> ApiResult<f64> {
    let doc = api.document(api.active_tab());
    let a = doc.solids().create_cuboid([0.0; 3], [10.0; 3])?;
    let b = doc.solids().create_cuboid([5.0; 3], [10.0; 3])?;
    a.intersect(&b)?.volume()
}

Each successful write marks the document changed and records one undo step. A failed operation leaves the document unchanged. Bulk creation and transforms prepare every entity before applying changes. Separate calls commit separately; OpGroup offers best-effort cleanup of creations, not rollback.

Boolean intersect, union and subtract replace the first solid and erase the second. intersects only tests bounding-box overlap. Volume and centroid are computed by the kernel from a tessellated solid (chord tolerance 0.1 drawing units, angular tolerance 0.0001 radians), then cached per geometry revision. A request may compute at most 32 uncached mass properties; excess work returns an error. Bulk operations and query batches are capped at 100,000 items.

Transports bind to one document tab. Typed handles from another transport and requests for another tab are rejected. Raw ObjectId values are relative to the receiving document. Errors are serialized as ApiError variants over IPC.

Feature	Use
Default	DTOs, facade, transport trait and binding schema
`host`	Kernel and entity adapters, executor, `DocApiBackend`, `InProcess`
`ipc`	`OcsPluginApiIpc` adapter for a plugin connected to the host

See the API reference for constructors and methods, architecture for backend rules, and binding guide for the Python facade and transport contract.