diff --git a/docs/work-orders/board-search-api.md b/docs/work-orders/board-search-api.md
index 6e7134f3..a190016e 100644
--- a/docs/work-orders/board-search-api.md
+++ b/docs/work-orders/board-search-api.md
@@ -93,6 +93,15 @@ Allowed `upliftStatuses`: `pending`, `approved`, `auto_approved`, `rejected` (ex
 
 Exemplo: pending uplifts only — `hasUplift=true&upliftStatuses=pending`.
 
+## Backend producer (`shoc-backend` `dev`)
+
+These facet keys are handled on `GET /board/search` in `shoc-backend` `origin/dev` ([#45](https://github.com/Sea-Haven-Industries/shoc-backend/pull/45), [#65](https://github.com/Sea-Haven-Industries/shoc-backend/pull/65)). There is no frontend deployment fence.
+
+- `IsAddOn` is owned by migration `20260730150000_WoIsAddOn` (legacy type-7 backfill).
+- `20260813193000_SH121_BoardSearchFacets` is a **no-op** so both PRs can land without a duplicate column.
+- Pagination matches this contract: `page` is 0-based; `pageSize` default/max is 100.
+- Aveta (`avetaOnly`) remains omitted until `avetaRequired` is confirmed.
+
 ### `datePreset`
 
 | FE key          | API value     |
diff --git a/src/test/app/(protected)/workorders/work-orders-advanced-search-wiring.test.tsx b/src/test/app/(protected)/workorders/work-orders-advanced-search-wiring.test.tsx
index 09475faf..197dd309 100644
--- a/src/test/app/(protected)/workorders/work-orders-advanced-search-wiring.test.tsx
+++ b/src/test/app/(protected)/workorders/work-orders-advanced-search-wiring.test.tsx
@@ -197,4 +197,47 @@ describe("WorkOrders Advanced Search page wiring (SH-121)", () => {
     expect(params.hasUplift).toBe(true);
     expect(params.upliftStatuses).toEqual(["pending"]);
   });
+
+  it("applies Indicators, Flag, and Internal WO# through the public Advanced Filters sheet", () => {
+    const view = renderWithProviders(<WorkOrdersListPage />, {
+      route: "/workorders",
+      withAuth: false,
+    });
+
+    fireEvent.click(screen.getByRole("button", { name: "Advanced Filters" }));
+    advOpen = true;
+    view.rerender(<WorkOrdersListPage />);
+
+    const sheet = screen.getByRole("dialog", { name: "Advanced Filters" });
+    fireEvent.click(within(sheet).getByRole("button", { name: /Indicators/i }));
+    fireEvent.click(within(sheet).getByRole("button", { name: /Rescheduled ≥ 2/i }));
+    fireEvent.click(within(sheet).getByRole("button", { name: /Carried Over ≥ 2/i }));
+    fireEvent.click(within(sheet).getByRole("button", { name: /^Add-On$/i }));
+
+    fireEvent.click(within(sheet).getByRole("button", { name: /^Flag$/i }));
+    fireEvent.click(within(sheet).getByRole("button", { name: /^Red$/i }));
+
+    fireEvent.click(within(sheet).getByRole("button", { name: /Work Order Number/i }));
+    fireEvent.click(within(sheet).getByRole("button", { name: /Internal numbers only/i }));
+
+    fireEvent.click(within(sheet).getByRole("button", { name: /apply filters/i }));
+
+    expect(applyAdvancedFilters).toHaveBeenCalled();
+    const appliedCalls = applyAdvancedFilters.mock.calls;
+    const applied = appliedCalls[appliedCalls.length - 1]?.[0] as typeof EMPTY_ADVANCED_FILTERS;
+    expect(applied.rescheduled).toBe(true);
+    expect(applied.carriedOver).toBe(true);
+    expect(applied.addOn).toBe(true);
+    expect(applied.flagColors.has("#EF4444")).toBe(true);
+    expect(applied.internalOnly).toBe(true);
+
+    const params = toBoardSearchQueryParams({ filters: applied });
+    expect(params.page).toBe(0);
+    expect(params.pageSize).toBe(BOARD_SEARCH_MAX_PAGE_SIZE);
+    expect(params.rescheduled).toBe(true);
+    expect(params.carriedOver).toBe(true);
+    expect(params.addOn).toBe(true);
+    expect(params.flagColors).toEqual(["#EF4444"]);
+    expect(params.internalOnly).toBe(true);
+  });
 });