diff --git a/src/ui/search.test.ts b/src/ui/search.test.ts
index f1cae41..86b4287 100644
--- a/src/ui/search.test.ts
+++ b/src/ui/search.test.ts
@@ -1,6 +1,7 @@
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi } from "vitest";
 import { SumEngine } from "../engine";
-import { parseResultQuery } from "./search";
+import { parseResultQuery, searchAllSheets, SearchDeps, SearchDoc } from "./search";
+import { Workspace } from "../workspace";
 import Decimal from "decimal.js";
 
 describe("parseResultQuery", () => {
@@ -97,3 +98,146 @@ describe("parseResultQuery", () => {
     expect(res).toBeNull();
   });
 });
+
+describe("searchAllSheets", () => {
+  it("returns empty array for empty query", () => {
+    const deps = {} as SearchDeps;
+    expect(searchAllSheets(deps, "   ")).toEqual([]);
+  });
+
+  it("performs full-text search across multiple sheets", () => {
+    const docs: SearchDoc[] = [
+      { id: "1", title: "Doc 1", text: "Hello world\nThis is a test" },
+      { id: "2", title: "Doc 2", text: "Another test\nNothing here" },
+    ];
+    const deps = {
+      docs: () => docs,
+      engine: new SumEngine(),
+    } as SearchDeps;
+
+    const hits = searchAllSheets(deps, "test");
+    expect(hits).toHaveLength(2);
+    expect(hits[0]).toMatchObject({ docId: "1", docTitle: "Doc 1", line: 2, text: "This is a test" });
+    expect(hits[1]).toMatchObject({ docId: "2", docTitle: "Doc 2", line: 1, text: "Another test" });
+  });
+
+  it("limits results to 200 hits for text search", () => {
+    const lines = Array(250).fill("test string");
+    const docs: SearchDoc[] = [
+      { id: "1", title: "Doc 1", text: lines.join("\n") },
+    ];
+    const deps = {
+      docs: () => docs,
+      engine: new SumEngine(),
+    } as SearchDeps;
+
+    const hits = searchAllSheets(deps, "test");
+    expect(hits).toHaveLength(200);
+  });
+
+  describe("numeric threshold search", () => {
+    const engine = new SumEngine();
+
+    const createMockWorkspace = (results: any[]) => {
+      return {
+        getCachedResults: vi.fn().mockReturnValue(results)
+      } as unknown as Workspace;
+    };
+
+    it("matches exact value (=)", () => {
+      const docs: SearchDoc[] = [{ id: "1", title: "Doc 1", text: "100" }];
+      const workspace = createMockWorkspace([{
+        value: { kind: "quantity", value: new Decimal(100) },
+        text: "100"
+      }]);
+
+      const deps = {
+        docs: () => docs,
+        engine,
+        workspace,
+      } as unknown as SearchDeps;
+
+      const hits = searchAllSheets(deps, "= 100");
+      expect(hits).toHaveLength(1);
+      expect(hits[0]).toMatchObject({ docId: "1", line: 1, result: "100" });
+
+      const noHits = searchAllSheets(deps, "= 99");
+      expect(noHits).toHaveLength(0);
+    });
+
+    it("matches greater than (>)", () => {
+      const docs: SearchDoc[] = [{ id: "1", title: "Doc 1", text: "150\n50" }];
+      const workspace = createMockWorkspace([
+        { value: { kind: "quantity", value: new Decimal(150) }, text: "150" },
+        { value: { kind: "quantity", value: new Decimal(50) }, text: "50" }
+      ]);
+
+      const deps = {
+        docs: () => docs,
+        engine,
+        workspace,
+      } as unknown as SearchDeps;
+
+      const hits = searchAllSheets(deps, "> 100");
+      expect(hits).toHaveLength(1);
+      expect(hits[0].line).toBe(1);
+    });
+
+    it("matches approximate value (~)", () => {
+      const docs: SearchDoc[] = [{ id: "1", title: "Doc 1", text: "100.5\n99.5\n105" }];
+      const workspace = createMockWorkspace([
+        { value: { kind: "quantity", value: new Decimal(100.5) }, text: "100.5" },
+        { value: { kind: "quantity", value: new Decimal(99.5) }, text: "99.5" },
+        { value: { kind: "quantity", value: new Decimal(105) }, text: "105" }
+      ]);
+
+      const deps = {
+        docs: () => docs,
+        engine,
+        workspace,
+      } as unknown as SearchDeps;
+
+      const hits = searchAllSheets(deps, "~ 100");
+      expect(hits).toHaveLength(2); // 100.5 and 99.5 are within 1% of 100
+      expect(hits[0].line).toBe(1);
+      expect(hits[1].line).toBe(2);
+    });
+
+    it("ignores non-quantity results during numeric search", () => {
+      const docs: SearchDoc[] = [{ id: "1", title: "Doc 1", text: "100\nnot a number" }];
+      const workspace = createMockWorkspace([
+        { value: { kind: "quantity", value: new Decimal(100) }, text: "100" },
+        { value: null, text: null }
+      ]);
+
+      const deps = {
+        docs: () => docs,
+        engine,
+        workspace,
+      } as unknown as SearchDeps;
+
+      const hits = searchAllSheets(deps, "> 50");
+      expect(hits).toHaveLength(1);
+    });
+
+    it("limits results to 200 hits for numeric search", () => {
+      const lines = Array(250).fill("100");
+      const docs: SearchDoc[] = [{ id: "1", title: "Doc 1", text: lines.join("\n") }];
+
+      const results = Array(250).fill({
+        value: { kind: "quantity", value: new Decimal(100) },
+        text: "100"
+      });
+      const workspace = createMockWorkspace(results);
+
+      const deps = {
+        docs: () => docs,
+        engine,
+        workspace,
+      } as unknown as SearchDeps;
+
+      const hits = searchAllSheets(deps, "> 50");
+      expect(hits).toHaveLength(200);
+    });
+  });
+});
diff --git a/src/ui/search.ts b/src/ui/search.ts
index 97f3671..df4ba4e 100644
--- a/src/ui/search.ts
+++ b/src/ui/search.ts
@@ -40,7 +40,7 @@ export function parseResultQuery(engine: SumEngine, q: string): { op: string; th
   return { op: m[1], threshold: v };
 }
 
-function searchAllSheets(deps: SearchDeps, query: string): SearchHit[] {
+export function searchAllSheets(deps: SearchDeps, query: string): SearchHit[] {
   const q = query.trim();
   if (!q) return [];
   const docs = deps.docs();