ocs_doc_api: Phase 2b-b (Hatch)

- CreateHatch(HatchSpec) op + GetHatchBoundary query (append-only).
- HatchSpec{boundary: Vec<[f64;2]>, solid}; executor validates >= 3 boundary points.
- backend add_hatch (Line-edge BoundaryPath, solid/pattern) + hatch_boundary
  (reconstruct loops from Line edges; non-line edges -> Unsupported).
- Hatch bounds from boundary edges; facade create_hatch + Entity handle.
- spec Hatch family; api_reference + binding_schema regenerated; mocks + baseline.
- Test phase2b_hatch_create_boundary_bounds_delete -> 606 host lib + 8 crate + 3 consistency green.

crates/ocs_doc_api/src/gen/api_reference.md

@@ -113,6 +113,18 @@ Multi-line text annotation. content()/set_content() read+replace the value; tran
 - **content**(``) -> `String` — query `GetTextContent`
 - **set_content**(`value: &str`) -> `()` — op `SetTextContent`
 
+## `Entity` (acadrust `Hatch`, collection `curves`)
+
+Filled region over a closed polyline boundary. boundary() returns the loops; bounds from boundary; generic delete.
+
+### Constructors (`doc.curves()`)
+
+- **create_hatch**(`boundary: &[[f64; 2]], solid: bool`) -> `Entity`
+
+### Methods
+
+- **boundary**(``) -> `Vec<Vec<[f64; 2]>>` — query `GetHatchBoundary`
+
 ## `Entity` (acadrust `Insert`, collection `entities`)
 
 Block reference. Place an existing BlockRecord by name; transform moves its insert point.

crates/ocs_doc_api/src/gen/binding_schema.json

@@ -258,6 +258,25 @@
       ],
       "name": "MText"
     },
+    {
+      "acadrust_variant": "Hatch",
+      "collection": "curves",
+      "handle": "Entity",
+      "methods": [
+        {
+          "args": [],
+          "bulk": false,
+          "fixed": null,
+          "kind": "query",
+          "name": "boundary",
+          "op": null,
+          "query": "GetHatchBoundary",
+          "read_only": true,
+          "returns": "Vec<Vec<[f64; 2]>>"
+        }
+      ],
+      "name": "Hatch"
+    },
     {
       "acadrust_variant": "Insert",
       "collection": "entities",

crates/ocs_doc_api/src/gen/ops_gen.rs

@@ -7,7 +7,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::id::ObjectId;
-use crate::ops::{BoolOp, Curve2Spec, EntitySpec, InsertSpec, MTextSpec, PlacementSpec, SolidPrimitive, TextSpec, ViewportSpec};
+use crate::ops::{BoolOp, Curve2Spec, EntitySpec, HatchSpec, InsertSpec, MTextSpec, PlacementSpec, SolidPrimitive, TextSpec, ViewportSpec};
 
 /// A typed write operation (plan §5). Each variant is ONE atomic host call = one
 /// undo step. Append new variants at the END only.
@@ -36,4 +36,6 @@ pub enum Operation {
     CreateText(TextSpec),
     CreateMText(MTextSpec),
     SetTextContent { id: ObjectId, value: String },
+    // hatch
+    CreateHatch(HatchSpec),
 }

crates/ocs_doc_api/src/gen/query_gen.rs

@@ -21,4 +21,6 @@ pub enum Query {
     GetGeometryRevision,
     /// The text content of a Text/MText annotation.
     GetTextContent { id: ObjectId },
+    /// The boundary loops of a Hatch (outer + islands) as polylines.
+    GetHatchBoundary { id: ObjectId },
 }