ocs_doc_api: Phase 3-ii — typed AttributeDefinition create (Phase 3 complete)

- CreateAttributeDefinition(AttributeDefinitionSpec) op (append-only).
- backend add_attribute_definition (ATTDEF tag/prompt/default/insertion/height/rotation).
- facade create_attribute_definition; entity_kind_name AttributeDefinition/AttributeEntity.
- spec AttributeDefinition family; api_reference + binding_schema regenerated; mocks + baseline.
- Test phase3ii_create_attribute_definition -> 614 host lib + 3 consistency green.

crates/ocs_doc_api/src/gen/api_reference.md

@@ -154,6 +154,14 @@ Block reference. Place an existing BlockRecord by name; transform moves its inse
 - **attributes**() -> `Vec<(String, String)>` — query `GetAttributes`
 - **set_attribute**(tag: &str, value: &str) -> `()` — op `SetAttribute`
 
+## `Entity` (acadrust `AttributeDefinition`, collection `entities`)
+
+In-block attribute definition (ATTDEF): tag/prompt/default at an insertion point.
+
+### Constructors (`doc.entities()`)
+
+- **create_attribute_definition**(tag: &str, prompt: &str, default_value: &str, insertion_point: [f64; 3], height: f64, rotation: f64) -> `Entity` — `CreateAttributeDefinition`
+
 ## `Entity` (acadrust `Viewport`, collection `entities`)
 
 Paper-space viewport: a width×height window at center looking at view_target with view_height zoom. bounds = center ± w/2,h/2; transform moves center.

crates/ocs_doc_api/src/gen/binding_schema.json

@@ -335,6 +335,13 @@
       ],
       "name": "Insert"
     },
+    {
+      "acadrust_variant": "AttributeDefinition",
+      "collection": "entities",
+      "handle": "Entity",
+      "methods": [],
+      "name": "AttributeDefinition"
+    },
     {
       "acadrust_variant": "Viewport",
       "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, DimensionAngularSpec, DimensionRadialSpec, DimensionSpec, EntitySpec, HatchSpec, InsertSpec, MTextSpec, PlacementSpec, RasterImageSpec, SolidPrimitive, TextSpec, ViewportSpec};
+use crate::ops::{AttributeDefinitionSpec, BoolOp, Curve2Spec, DimensionAngularSpec, DimensionRadialSpec, DimensionSpec, EntitySpec, HatchSpec, InsertSpec, MTextSpec, PlacementSpec, RasterImageSpec, 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.
@@ -52,4 +52,6 @@ pub enum Operation {
     CreateDimensionRadius(DimensionRadialSpec),
     CreateDimensionDiameter(DimensionRadialSpec),
     CreateDimensionAngular(DimensionAngularSpec),
+    // attribute definitions
+    CreateAttributeDefinition(AttributeDefinitionSpec),
 }