diff --git a/tests/integration/content-aware-resize.test.ts b/tests/integration/content-aware-resize.test.ts
new file mode 100644
index 00000000..a182a4ad
--- /dev/null
+++ b/tests/integration/content-aware-resize.test.ts
@@ -0,0 +1,152 @@
+/**
+ * Integration tests for the content-aware resize (seam carving) API endpoint.
+ *
+ * This tool uses the Python sidecar, so in CI/test environments where Python
+ * is not available the route will return 501 (lite mode) or 422 (Python error).
+ * Tests gracefully handle both scenarios while still verifying route existence
+ * and input validation.
+ */
+
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const FIXTURES = join(__dirname, "..", "fixtures");
+const PNG_200x150 = readFileSync(join(FIXTURES, "test-200x150.png"));
+
+let testApp: TestApp;
+let app: TestApp["app"];
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  app = testApp.app;
+  adminToken = await loginAsAdmin(app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+describe("Content-Aware Resize", () => {
+  it("route exists and responds to POST", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
+      {
+        name: "settings",
+        content: JSON.stringify({ width: 150, height: 120, protectFaces: false }),
+      },
+    ]);
+
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/v1/tools/content-aware-resize",
+      headers: {
+        authorization: `Bearer ${adminToken}`,
+        "content-type": contentType,
+      },
+      body,
+    });
+
+    // 200 = Python available, 422 = Python error, 501 = lite mode stub
+    // Any of these proves the route is registered and reachable
+    expect([200, 422, 501]).toContain(res.statusCode);
+  }, 60_000);
+
+  it("rejects requests without a file", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "settings", content: JSON.stringify({ width: 150 }) },
+    ]);
+
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/v1/tools/content-aware-resize",
+      headers: {
+        authorization: `Bearer ${adminToken}`,
+        "content-type": contentType,
+      },
+      body,
+    });
+
+    expect(res.statusCode).toBe(400);
+  });
+
+  it("processes with only width specified", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
+      { name: "settings", content: JSON.stringify({ width: 150, protectFaces: false }) },
+    ]);
+
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/v1/tools/content-aware-resize",
+      headers: {
+        authorization: `Bearer ${adminToken}`,
+        "content-type": contentType,
+      },
+      body,
+    });
+
+    // Accept 200 (Python available) or 422/501 (Python not available)
+    expect([200, 422, 501]).toContain(res.statusCode);
+
+    if (res.statusCode === 200) {
+      const resBody = JSON.parse(res.body);
+      expect(resBody.downloadUrl).toBeDefined();
+      expect(resBody.width).toBe(150);
+    }
+  }, 60_000);
+
+  it("processes with only height specified", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
+      { name: "settings", content: JSON.stringify({ height: 120, protectFaces: false }) },
+    ]);
+
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/v1/tools/content-aware-resize",
+      headers: {
+        authorization: `Bearer ${adminToken}`,
+        "content-type": contentType,
+      },
+      body,
+    });
+
+    expect([200, 422, 501]).toContain(res.statusCode);
+
+    if (res.statusCode === 200) {
+      const resBody = JSON.parse(res.body);
+      expect(resBody.downloadUrl).toBeDefined();
+      expect(resBody.height).toBe(120);
+    }
+  }, 60_000);
+
+  it("rejects enlargement beyond source dimensions", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "test.png", contentType: "image/png", content: PNG_200x150 },
+      { name: "settings", content: JSON.stringify({ width: 400, protectFaces: false }) },
+    ]);
+
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/v1/tools/content-aware-resize",
+      headers: {
+        authorization: `Bearer ${adminToken}`,
+        "content-type": contentType,
+      },
+      body,
+    });
+
+    // 422 = Python caught the enlargement error, 501 = lite mode
+    // Should never be 200 since 400 > 200px source width
+    expect(res.statusCode).not.toBe(200);
+    expect([422, 501]).toContain(res.statusCode);
+
+    if (res.statusCode === 422) {
+      const resBody = JSON.parse(res.body);
+      expect(resBody.error || resBody.details).toBeDefined();
+    }
+  }, 60_000);
+});
diff --git a/tests/integration/lite-variant.test.ts b/tests/integration/lite-variant.test.ts
index 5933b7f0..7ba2978f 100644
--- a/tests/integration/lite-variant.test.ts
+++ b/tests/integration/lite-variant.test.ts
@@ -35,12 +35,20 @@ describe("Lite variant", () => {
         "blur-faces",
         "erase-object",
         "ocr",
+        "content-aware-resize",
       ]);
     });
   });
 
   describe("AI tool routes return 501", () => {
-    const aiTools = ["remove-background", "upscale", "blur-faces", "erase-object", "ocr"];
+    const aiTools = [
+      "remove-background",
+      "upscale",
+      "blur-faces",
+      "erase-object",
+      "ocr",
+      "content-aware-resize",
+    ];
 
     for (const toolId of aiTools) {
       it(`POST /api/v1/tools/${toolId} returns 501`, async () => {