diff --git a/backend/internal/handler/dev_handler.go b/backend/internal/handler/dev_handler.go
index 257ee81a..63776688 100644
--- a/backend/internal/handler/dev_handler.go
+++ b/backend/internal/handler/dev_handler.go
@@ -1619,7 +1619,6 @@ func (h *DevHandler) ListConsents(c *fiber.Ctx) error {
 
 	var consents []domain.ClientConsentWithTenantInfo
 	var total int64
-	var err error
 
 	if subject != "" {
 		// Resolve subject if it's email/name (Legacy support)
diff --git a/devfront/playwright.config.ts b/devfront/playwright.config.ts
index e1d16054..d0ba28d0 100644
--- a/devfront/playwright.config.ts
+++ b/devfront/playwright.config.ts
@@ -3,6 +3,11 @@ import { defineConfig, devices } from "@playwright/test";
 const configuredWorkers = process.env.PLAYWRIGHT_WORKERS
   ? Number.parseInt(process.env.PLAYWRIGHT_WORKERS, 10)
   : undefined;
+const skipWebServer =
+  process.env.PLAYWRIGHT_SKIP_WEBSERVER === "1" ||
+  process.env.PLAYWRIGHT_SKIP_WEBSERVER === "true";
+const baseURL =
+  process.env.PLAYWRIGHT_BASE_URL || "http://localhost:5174";
 
 /**
  * Read environment variables from file.
@@ -30,7 +35,7 @@ export default defineConfig({
   /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
   use: {
     /* Base URL to use in actions like `await page.goto('/')`. */
-    baseURL: "http://localhost:5174",
+    baseURL,
 
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: "on-first-retry",
@@ -55,11 +60,13 @@ export default defineConfig({
   ],
 
   /* Run your local dev server before starting the tests */
-  webServer: {
-    command: process.env.CI
-      ? "npm run build && npm run preview -- --port 5174"
-      : "npm run dev -- --port 5174",
-    url: "http://localhost:5174",
-    reuseExistingServer: !process.env.CI,
-  },
+  webServer: skipWebServer
+    ? undefined
+    : {
+        command: process.env.CI
+          ? "npm run build && npm run preview -- --port 5174"
+          : "npm run dev -- --port 5174",
+        url: baseURL,
+        reuseExistingServer: !process.env.CI,
+      },
 });
diff --git a/devfront/tests/clients.spec.ts b/devfront/tests/clients.spec.ts
index b304583e..09b492f8 100644
--- a/devfront/tests/clients.spec.ts
+++ b/devfront/tests/clients.spec.ts
@@ -5,6 +5,13 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
+
+test.afterEach(async ({ page }, testInfo) => {
+  if (testInfo.status === "passed") {
+    await captureEvidence(page, testInfo, testInfo.title);
+  }
+});
 
 test("clients page loads correctly", async ({ page }) => {
   await seedAuth(page);
diff --git a/devfront/tests/devfront-audit.spec.ts b/devfront/tests/devfront-audit.spec.ts
index 8a0890d2..9158fa4e 100644
--- a/devfront/tests/devfront-audit.spec.ts
+++ b/devfront/tests/devfront-audit.spec.ts
@@ -6,10 +6,17 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
 
 const appNamePlaceholder = /My Awesome Application|예: 멋진 애플리케이션/i;
 
 test.describe("DevFront audit logs", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
   test.beforeEach(async ({ page }) => {
     page.on("dialog", async (dialog) => {
       await dialog.accept().catch(() => {});
diff --git a/devfront/tests/devfront-clients-lifecycle.spec.ts b/devfront/tests/devfront-clients-lifecycle.spec.ts
index a048eaa7..9a66341b 100644
--- a/devfront/tests/devfront-clients-lifecycle.spec.ts
+++ b/devfront/tests/devfront-clients-lifecycle.spec.ts
@@ -6,11 +6,18 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
 
 const appNamePlaceholder = /My Awesome Application|예: 멋진 애플리케이션/i;
 const jwksUri = "https://rp.example.com/.well-known/jwks.json";
 
 test.describe("DevFront clients lifecycle", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
   test.beforeEach(async ({ page }) => {
     page.on("dialog", async (dialog) => {
       await dialog.accept();
diff --git a/devfront/tests/devfront-consents.spec.ts b/devfront/tests/devfront-consents.spec.ts
index 27518c3a..abcc4db6 100644
--- a/devfront/tests/devfront-consents.spec.ts
+++ b/devfront/tests/devfront-consents.spec.ts
@@ -5,8 +5,15 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
 
 test.describe("DevFront consents", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
   test.beforeEach(async ({ page }) => {
     page.on("dialog", async (dialog) => {
       await dialog.accept();
diff --git a/devfront/tests/devfront-relationships.spec.ts b/devfront/tests/devfront-relationships.spec.ts
new file mode 100644
index 00000000..b88fb3a3
--- /dev/null
+++ b/devfront/tests/devfront-relationships.spec.ts
@@ -0,0 +1,63 @@
+import { expect, test } from "@playwright/test";
+import {
+  type ClientRelation,
+  type Consent,
+  installDevApiMock,
+  makeClient,
+  seedAuth,
+} from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
+
+test.describe("DevFront relationships", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
+  test.beforeEach(async ({ page }) => {
+    page.on("dialog", async (dialog) => {
+      await dialog.accept();
+    });
+    await seedAuth(page, "rp_admin");
+  });
+
+  test("list add and remove direct RP relationships", async ({ page }) => {
+    const state = {
+      clients: [makeClient("client-rel", { name: "Relations app" })],
+      consents: [] as Consent[],
+      relations: {
+        "client-rel": [
+          {
+            relation: "config_editor",
+            subject: "User:user-1",
+            subjectType: "User",
+            subjectId: "user-1",
+          },
+        ] satisfies ClientRelation[],
+      },
+      auditLogsByCursor: undefined,
+    };
+    await installDevApiMock(page, state);
+
+    await page.goto("/clients/client-rel/relationships");
+    await expect(page.getByText("Client Relationships")).toBeVisible();
+    await expect(page.getByText("User:user-1")).toBeVisible();
+
+    await page.getByLabel(/Relation/i).selectOption("secret_rotator");
+    await page.getByLabel(/User ID/i).fill("user-2");
+    await page.getByRole("button", { name: /^Add$/i }).click();
+
+    await expect(page.getByText("User:user-2")).toBeVisible();
+    await expect.poll(() => state.relations["client-rel"]?.length ?? 0).toBe(2);
+
+    await page
+      .locator("tr")
+      .filter({ hasText: "User:user-2" })
+      .getByRole("button", { name: /Delete|삭제/i })
+      .click();
+
+    await expect(page.getByText("User:user-2")).toHaveCount(0);
+    await expect.poll(() => state.relations["client-rel"]?.length ?? 0).toBe(1);
+  });
+});
diff --git a/devfront/tests/devfront-security.spec.ts b/devfront/tests/devfront-security.spec.ts
index 5ac03361..0e451a59 100644
--- a/devfront/tests/devfront-security.spec.ts
+++ b/devfront/tests/devfront-security.spec.ts
@@ -5,8 +5,15 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
 
 test.describe("DevFront security and isolation", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
   test.beforeEach(async ({ page }) => {
     page.on("dialog", async (dialog) => {
       await dialog.accept();
diff --git a/devfront/tests/devfront-tenant-switch.spec.ts b/devfront/tests/devfront-tenant-switch.spec.ts
index 7471b1f7..8591b9fb 100644
--- a/devfront/tests/devfront-tenant-switch.spec.ts
+++ b/devfront/tests/devfront-tenant-switch.spec.ts
@@ -4,8 +4,15 @@ import {
   makeClient,
   seedAuth,
 } from "./helpers/devfront-fixtures";
+import { captureEvidence } from "./helpers/evidence";
 
 test.describe("DevFront tenant switch", () => {
+  test.afterEach(async ({ page }, testInfo) => {
+    if (testInfo.status === "passed") {
+      await captureEvidence(page, testInfo, testInfo.title);
+    }
+  });
+
   const MOCK_STATE = {
     clients: [makeClient("client-a", { name: "Tenant A App" })],
     consents: [],
diff --git a/devfront/tests/example.spec.ts b/devfront/tests/example.spec.ts
index 53b304ae..565aa49a 100644
--- a/devfront/tests/example.spec.ts
+++ b/devfront/tests/example.spec.ts
@@ -1,4 +1,11 @@
 import { expect, test } from "@playwright/test";
+import { captureEvidence } from "./helpers/evidence";
+
+test.afterEach(async ({ page }, testInfo) => {
+  if (testInfo.status === "passed") {
+    await captureEvidence(page, testInfo, testInfo.title);
+  }
+});
 
 test("has title", async ({ page }) => {
   await page.goto("/");
diff --git a/devfront/tests/helpers/devfront-fixtures.ts b/devfront/tests/helpers/devfront-fixtures.ts
index d914f364..a375f4f6 100644
--- a/devfront/tests/helpers/devfront-fixtures.ts
+++ b/devfront/tests/helpers/devfront-fixtures.ts
@@ -53,6 +53,13 @@ export type Consent = {
   tenantName: string;
 };
 
+export type ClientRelation = {
+  relation: string;
+  subject: string;
+  subjectType: string;
+  subjectId: string;
+};
+
 export type AuditLog = {
   event_id: string;
   timestamp: string;
@@ -67,6 +74,7 @@ export type AuditLog = {
 export type DevApiMockState = {
   clients: Client[];
   consents: Consent[];
+  relations?: Record<string, ClientRelation[]>;
   auditLogsByCursor?: Record<
     string,
     { items: AuditLog[]; next_cursor?: string }
@@ -292,6 +300,68 @@ export async function installDevApiMock(page: Page, state: DevApiMockState) {
       });
     }
 
+    if (
+      pathname.startsWith("/api/v1/dev/clients/") &&
+      pathname.endsWith("/relations") &&
+      method === "GET"
+    ) {
+      const clientId = pathname.split("/")[5] ?? "";
+      return json(route, {
+        items: state.relations?.[clientId] ?? [],
+      });
+    }
+
+    if (
+      pathname.startsWith("/api/v1/dev/clients/") &&
+      pathname.endsWith("/relations") &&
+      method === "POST"
+    ) {
+      const clientId = pathname.split("/")[5] ?? "";
+      const payload = (request.postDataJSON() as {
+        relation?: string;
+        subject?: string;
+        userId?: string;
+      }) || { relation: "config_editor" };
+      const subject =
+        payload.subject ||
+        (payload.userId ? `User:${payload.userId}` : "User:playwright-user");
+      const subjectId = subject.startsWith("User:")
+        ? subject.slice("User:".length)
+        : subject;
+      const created: ClientRelation = {
+        relation: payload.relation ?? "config_editor",
+        subject,
+        subjectType: "User",
+        subjectId,
+      };
+      if (!state.relations) {
+        state.relations = {};
+      }
+      if (!state.relations[clientId]) {
+        state.relations[clientId] = [];
+      }
+      state.relations[clientId].push(created);
+      appendAuditLog("CLIENT_RELATION_CREATE", "ADD_RELATION", clientId);
+      return json(route, created, 201);
+    }
+
+    if (
+      pathname.startsWith("/api/v1/dev/clients/") &&
+      pathname.endsWith("/relations") &&
+      method === "DELETE"
+    ) {
+      const clientId = pathname.split("/")[5] ?? "";
+      const relation = searchParams.get("relation") || "";
+      const subject = searchParams.get("subject") || "";
+      if (state.relations?.[clientId]) {
+        state.relations[clientId] = state.relations[clientId].filter(
+          (item) => !(item.relation === relation && item.subject === subject),
+        );
+      }
+      appendAuditLog("CLIENT_RELATION_DELETE", "REMOVE_RELATION", clientId);
+      return route.fulfill({ status: 204 });
+    }
+
     if (
       pathname.startsWith("/api/v1/dev/clients/") &&
       pathname.endsWith("/status") &&
diff --git a/docker/ory/oathkeeper/rules.active.json b/docker/ory/oathkeeper/rules.active.json
index fd6bfb2d..4a0735da 100755
--- a/docker/ory/oathkeeper/rules.active.json
+++ b/docker/ory/oathkeeper/rules.active.json
@@ -156,4 +156,4 @@
     "authorizer": { "handler": "allow" },
     "mutators": [{ "handler": "noop" }]
   }
-]
+]
\ No newline at end of file