diff --git a/.changeset/bu-subtree-docstring-attribution.md b/.changeset/bu-subtree-docstring-attribution.md
new file mode 100644
index 0000000000..cb882b8962
--- /dev/null
+++ b/.changeset/bu-subtree-docstring-attribution.md
@@ -0,0 +1,22 @@
+---
+"@objectstack/spec": patch
+"@objectstack/platform-objects": patch
+---
+
+docs: fix `business_unit` sharing-rule docstrings that still attributed the BU subtree expansion to the narrow recipient (#8098)
+
+#7807 (PR #8097, `9b519815`) narrowed the `business_unit` sharing-rule
+recipient to expand exactly one unit's members, moving the subtree walk onto
+`unit_and_subordinates`. Two docstrings never got the memo:
+`IBusinessUnitGraphService` in `packages/spec/src/contracts/sharing-service.ts`
+and the `sys_business_unit` object definition in
+`packages/platform-objects/src/identity/sys-business-unit.object.ts`. Both
+still said `recipient_type='business_unit'` sharing rules were driven by the
+subtree walk. Both now name `unit_and_subordinates` as the subtree consumer,
+with `business_unit` as the narrow (single-unit) one.
+
+These are comment-only corrections — the `IBusinessUnitGraphService`
+docstring surfaces in `@objectstack/spec`'s built `dist/**/*.d.ts` hover, and
+the `sys_business_unit` docstring surfaces in
+`@objectstack/platform-objects`'s built `dist/**/*.d.ts` hover; no runtime or
+authoring behaviour changes.
diff --git a/packages/platform-objects/src/identity/sys-business-unit.object.ts b/packages/platform-objects/src/identity/sys-business-unit.object.ts
index 8359592564..895902c986 100644
--- a/packages/platform-objects/src/identity/sys-business-unit.object.ts
+++ b/packages/platform-objects/src/identity/sys-business-unit.object.ts
@@ -14,7 +14,8 @@ import { ObjectSchema, Field } from '@objectstack/spec/data';
  * structure works identically regardless of value.
  *
  * Drives:
- *   - `recipient_type='business_unit'` sharing rules
+ *   - `recipient_type='unit_and_subordinates'` sharing rules (subtree walk);
+ *     `business_unit` expands only the one named unit's members
  *   - `bu:` approver prefix in the approval engine
  *   - Report rollups and manager chains in CRM/PM apps
  *
diff --git a/packages/spec/src/contracts/sharing-service.ts b/packages/spec/src/contracts/sharing-service.ts
index bf0320a649..1d46bfd925 100644
--- a/packages/spec/src/contracts/sharing-service.ts
+++ b/packages/spec/src/contracts/sharing-service.ts
@@ -562,7 +562,8 @@ export interface ITeamGraphService {
  *
  * Walks `parent_business_unit_id` to expand a department into the union of
  * its members and all descendant members. Drives:
- *   - `recipient_type='business_unit'` sharing rules
+ *   - `recipient_type='unit_and_subordinates'` sharing rules (this subtree
+ *     walk); `business_unit` expands only the one named unit's members
  *   - `bu:` approver prefix in the approval engine
  *   - report rollups, manager chains, and similar org-aware logic
  */