diff --git a/extensions/browser/src/test-utils/vitest-mock-fn.ts b/extensions/browser/src/test-utils/vitest-mock-fn.ts
index eab9c6ec04d..9e182f9a061 100644
--- a/extensions/browser/src/test-utils/vitest-mock-fn.ts
+++ b/extensions/browser/src/test-utils/vitest-mock-fn.ts
@@ -1,3 +1,2 @@
-// oxlint-disable-next-line typescript/no-explicit-any
-export type MockFn<T extends (...args: any[]) => any = (...args: any[]) => any> =
+export type MockFn<T extends (...args: unknown[]) => unknown = (...args: unknown[]) => unknown> =
   import("vitest").Mock<T>;
diff --git a/extensions/matrix/runtime-api.ts b/extensions/matrix/runtime-api.ts
index 74bfcc64c26..3768d1eb365 100644
--- a/extensions/matrix/runtime-api.ts
+++ b/extensions/matrix/runtime-api.ts
@@ -50,7 +50,7 @@ export type {
   ChannelMessageActionContext,
 } from "openclaw/plugin-sdk/channel-contract";
 export type { OpenClawConfig } from "openclaw/plugin-sdk/config-types";
-export { formatZonedTimestamp } from "openclaw/plugin-sdk/core";
+export { formatZonedTimestamp } from "openclaw/plugin-sdk/time-runtime";
 export type { PluginRuntime, RuntimeLogger } from "openclaw/plugin-sdk/plugin-runtime";
 export type { RuntimeEnv } from "openclaw/plugin-sdk/runtime-env";
 export type { WizardPrompter } from "openclaw/plugin-sdk/setup";
diff --git a/extensions/matrix/src/runtime-api.ts b/extensions/matrix/src/runtime-api.ts
index eeabd6fab76..19445ef1ee4 100644
--- a/extensions/matrix/src/runtime-api.ts
+++ b/extensions/matrix/src/runtime-api.ts
@@ -103,11 +103,8 @@ export {
   resolveSenderScopedGroupPolicy,
 } from "openclaw/plugin-sdk/channel-policy";
 export { buildTimeoutAbortSignal } from "./matrix/sdk/timeout-abort-signal.js";
-export {
-  formatZonedTimestamp,
-  type PluginRuntime,
-  type RuntimeLogger,
-} from "openclaw/plugin-sdk/core";
+export { formatZonedTimestamp } from "openclaw/plugin-sdk/time-runtime";
+export type { PluginRuntime, RuntimeLogger } from "openclaw/plugin-sdk/plugin-runtime";
 export type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
 // resolveMatrixAccountStringValues already comes from the Matrix API barrel.
 // Re-exporting auth-precedence here makes Jiti try to define the same export twice.
diff --git a/package.json b/package.json
index 203c690e837..67af11c02e5 100644
--- a/package.json
+++ b/package.json
@@ -542,6 +542,10 @@
       "types": "./dist/plugin-sdk/temp-path.d.ts",
       "default": "./dist/plugin-sdk/temp-path.js"
     },
+    "./plugin-sdk/time-runtime": {
+      "types": "./dist/plugin-sdk/time-runtime.d.ts",
+      "default": "./dist/plugin-sdk/time-runtime.js"
+    },
     "./plugin-sdk/logging-core": {
       "types": "./dist/plugin-sdk/logging-core.d.ts",
       "default": "./dist/plugin-sdk/logging-core.js"
diff --git a/packages/plugin-sdk/package.json b/packages/plugin-sdk/package.json
index 7a19d3308bf..8d9e367d970 100644
--- a/packages/plugin-sdk/package.json
+++ b/packages/plugin-sdk/package.json
@@ -60,6 +60,10 @@
       "types": "./dist/src/plugin-sdk/system-event-runtime.d.ts",
       "default": "./src/system-event-runtime.ts"
     },
+    "./time-runtime": {
+      "types": "./dist/src/plugin-sdk/time-runtime.d.ts",
+      "default": "./src/time-runtime.ts"
+    },
     "./transport-ready-runtime": {
       "types": "./dist/src/plugin-sdk/transport-ready-runtime.d.ts",
       "default": "./src/transport-ready-runtime.ts"
diff --git a/scripts/lib/plugin-sdk-entrypoints.json b/scripts/lib/plugin-sdk-entrypoints.json
index d0f1506d0b7..ff1429674d6 100644
--- a/scripts/lib/plugin-sdk-entrypoints.json
+++ b/scripts/lib/plugin-sdk-entrypoints.json
@@ -119,6 +119,7 @@
   "test-node-mocks",
   "testing",
   "temp-path",
+  "time-runtime",
   "logging-core",
   "migration",
   "migration-runtime",
diff --git a/src/acp/persistent-bindings.lifecycle.test.ts b/src/acp/persistent-bindings.lifecycle.test.ts
index 21897a87df2..a7d75145ea1 100644
--- a/src/acp/persistent-bindings.lifecycle.test.ts
+++ b/src/acp/persistent-bindings.lifecycle.test.ts
@@ -1,4 +1,4 @@
-import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 import type { OpenClawConfig } from "../config/config.js";
 import { buildConfiguredAcpSessionKey } from "./persistent-bindings.types.js";
 
@@ -43,11 +43,8 @@ const baseCfg = {
 
 let resetAcpSessionInPlace: typeof import("./persistent-bindings.lifecycle.js").resetAcpSessionInPlace;
 
-beforeAll(async () => {
-  ({ resetAcpSessionInPlace } = await import("./persistent-bindings.lifecycle.js"));
-});
-
-beforeEach(() => {
+beforeEach(async () => {
+  vi.resetModules();
   managerMocks.resolveSession.mockReset().mockReturnValue({ kind: "none" });
   managerMocks.closeSession.mockReset().mockResolvedValue({
     runtimeClosed: true,
@@ -57,6 +54,7 @@ beforeEach(() => {
   managerMocks.updateSessionRuntimeOptions.mockReset().mockResolvedValue(undefined);
   sessionMetaMocks.readAcpSessionEntry.mockReset().mockReturnValue(undefined);
   resolveMocks.resolveConfiguredAcpBindingSpecBySessionKey.mockReset().mockReturnValue(null);
+  ({ resetAcpSessionInPlace } = await import("./persistent-bindings.lifecycle.js"));
 });
 
 describe("resetAcpSessionInPlace", () => {
diff --git a/src/plugin-sdk/time-runtime.ts b/src/plugin-sdk/time-runtime.ts
new file mode 100644
index 00000000000..527d81046d1
--- /dev/null
+++ b/src/plugin-sdk/time-runtime.ts
@@ -0,0 +1,5 @@
+export {
+  formatUtcTimestamp,
+  formatZonedTimestamp,
+  resolveTimezone,
+} from "../infra/format-time/format-datetime.js";
diff --git a/src/plugins/contracts/plugin-sdk-runtime-api-guardrails.test.ts b/src/plugins/contracts/plugin-sdk-runtime-api-guardrails.test.ts
index a667f41b6fb..0131633c670 100644
--- a/src/plugins/contracts/plugin-sdk-runtime-api-guardrails.test.ts
+++ b/src/plugins/contracts/plugin-sdk-runtime-api-guardrails.test.ts
@@ -129,7 +129,7 @@ const RUNTIME_API_EXPORT_GUARDS: Record<string, readonly string[]> = {
     'export { writeJsonFileAtomically } from "openclaw/plugin-sdk/json-store";',
     'export type { ChannelDirectoryEntry, ChannelMessageActionContext } from "openclaw/plugin-sdk/channel-contract";',
     'export type { OpenClawConfig } from "openclaw/plugin-sdk/config-types";',
-    'export { formatZonedTimestamp } from "openclaw/plugin-sdk/core";',
+    'export { formatZonedTimestamp } from "openclaw/plugin-sdk/time-runtime";',
     'export type { PluginRuntime, RuntimeLogger } from "openclaw/plugin-sdk/plugin-runtime";',
     'export type { RuntimeEnv } from "openclaw/plugin-sdk/runtime-env";',
     'export type { WizardPrompter } from "openclaw/plugin-sdk/setup";',