diff --git a/docs/plugins/sdk-runtime.md b/docs/plugins/sdk-runtime.md
index f8764f72e45a..907752c3799f 100644
--- a/docs/plugins/sdk-runtime.md
+++ b/docs/plugins/sdk-runtime.md
@@ -429,13 +429,20 @@ snapshots; OpenClaw owns all persistence and lifecycle coordination.
     session.close();
     ```
 
-    Both `sendAudio()` input and `audio` event output use PCM16LE, 24 kHz, mono audio. The callback
-    receives:
+    `sessionKey` selects the agent conversation and workspace. `provider`, `model`, `voice`, and
+    `language` optionally override its configured Talk defaults. Input and output use signed
+    PCM16 little-endian audio at 24 kHz, mono (`session.audio.encoding` is `"pcm16"`).
 
-    - `state` when the session starts listening, thinking, speaking, or enters an error state
-    - ordered `audio` chunks with generation, sequence, and presentation timestamps
-    - `clear` when buffered output from an earlier generation must be discarded
-    - one terminal `closed` event
+    `sendAudio()` accepts an optional `timestamp`: the current output playback position in
+    milliseconds, used to trim interrupted speech. The callback receives:
+
+    - `state` (`idle`, `listening`, `thinking`, `speaking`, or `error`); `ptsMs` is the current
+      output position in milliseconds
+    - ordered `audio` chunks; `sequence` starts at zero and `ptsMs` is the chunk's presentation
+      time in milliseconds
+    - `clear`, with `barge-in` when the user interrupts or `cancel` for another cancellation;
+      discard buffered audio from older generations
+    - one terminal `closed`, with `completed` for a normal close or `error` after a failure
 
     After `closed`, `sendAudio()` throws while `cancelOutput()` and `close()` do nothing. A thrown or
     rejected callback closes the relay; if it fails during setup, `openSession()` rejects. Reopen a
diff --git a/src/gateway/talk-plugin-session.test.ts b/src/gateway/talk-plugin-session.test.ts
index 2e589d250bde..d2adcce8e68a 100644
--- a/src/gateway/talk-plugin-session.test.ts
+++ b/src/gateway/talk-plugin-session.test.ts
@@ -29,7 +29,10 @@ describe("plugin Talk session", () => {
     mocks.scope.mockReturnValue({
       pluginId: "avatar",
       gatewayMethodDispatchAllowed: true,
-      client: { connect: { scopes: ["operator.talk"] } },
+      client: {
+        connId: "plugin-http:127.0.0.1",
+        connect: { scopes: ["operator.talk"] },
+      },
       context: { logGateway: { warn: mocks.warn } },
     });
     mocks.createSession.mockResolvedValue({ relaySessionId: "relay-1" });
@@ -48,7 +51,7 @@ describe("plugin Talk session", () => {
       context: { logGateway: { warn: mocks.warn } },
       request: { sessionKey: "agent:main:avatar", voice: "alloy" },
     });
-    expect(createParams.ownerId).toMatch(/^plugin:avatar:/);
+    expect(createParams.ownerId).toBe("plugin:avatar:plugin-http:127.0.0.1");
 
     createParams.eventSink({ relaySessionId: "relay-1", type: "ready" });
     createParams.eventSink({ relaySessionId: "relay-1", type: "audioStarted" });
@@ -94,6 +97,16 @@ describe("plugin Talk session", () => {
     });
   });
 
+  it("shares the route owner across opens so relay session limits apply", async () => {
+    await openPluginTalkSession({ sessionKey: "agent:main:first", onEvent: vi.fn() });
+    await openPluginTalkSession({ sessionKey: "agent:main:second", onEvent: vi.fn() });
+
+    expect(mocks.createSession.mock.calls.map(([params]) => params.ownerId)).toEqual([
+      "plugin:avatar:plugin-http:127.0.0.1",
+      "plugin:avatar:plugin-http:127.0.0.1",
+    ]);
+  });
+
   it("stops accepting media after the Gateway closes the session", async () => {
     const onEvent = vi.fn();
     const session = await openPluginTalkSession({
@@ -154,7 +167,7 @@ describe("plugin Talk session", () => {
 
     expect(mocks.stopSession).toHaveBeenCalledWith({
       relaySessionId: "relay-1",
-      connId: expect.stringMatching(/^plugin:avatar:/),
+      connId: "plugin:avatar:plugin-http:127.0.0.1",
     });
   });
 
@@ -162,7 +175,10 @@ describe("plugin Talk session", () => {
     mocks.scope.mockReturnValue({
       pluginId: "avatar",
       gatewayMethodDispatchAllowed: true,
-      client: { connect: { scopes: ["operator.read"] } },
+      client: {
+        connId: "plugin-http:127.0.0.1",
+        connect: { scopes: ["operator.read"] },
+      },
       context: { logGateway: { warn: mocks.warn } },
     });
 
diff --git a/src/gateway/talk-plugin-session.ts b/src/gateway/talk-plugin-session.ts
index d4286d7779ac..7e21e4f1be73 100644
--- a/src/gateway/talk-plugin-session.ts
+++ b/src/gateway/talk-plugin-session.ts
@@ -1,4 +1,3 @@
-import { randomUUID } from "node:crypto";
 import { formatErrorMessage } from "../infra/errors.js";
 import { getPluginRuntimeGatewayRequestScope } from "../plugins/runtime/gateway-request-scope.js";
 import {
@@ -20,7 +19,12 @@ const PCM16_24KHZ_MONO_BYTES_PER_MS = 48;
 
 function requirePluginTalkScope() {
   const scope = getPluginRuntimeGatewayRequestScope();
-  if (!scope?.context || !scope.pluginId || scope.gatewayMethodDispatchAllowed !== true) {
+  if (
+    !scope?.context ||
+    !scope.pluginId ||
+    !scope.client?.connId ||
+    scope.gatewayMethodDispatchAllowed !== true
+  ) {
     throw new Error(
       "Interactive Talk sessions require a plugin request route that declares the gatewayMethodDispatch contract.",
     );
@@ -31,7 +35,10 @@ function requirePluginTalkScope() {
       "Interactive Talk sessions require an authenticated plugin request with Talk access.",
     );
   }
-  return { context: scope.context, pluginId: scope.pluginId };
+  return {
+    context: scope.context,
+    ownerId: `plugin:${scope.pluginId}:${scope.client.connId}`,
+  };
 }
 
 function createPluginTalkEventSink(
@@ -129,8 +136,7 @@ export async function openPluginTalkSession(
       "Choose an OpenClaw session before starting voice so the conversation uses the intended agent and workspace.",
     );
   }
-  const { context, pluginId } = requirePluginTalkScope();
-  const ownerId = `plugin:${pluginId}:${randomUUID()}`;
+  const { context, ownerId } = requirePluginTalkScope();
   const lifecycle: { relaySessionId?: string } = {};
   let deliveryError: unknown;
   const events = createPluginTalkEventSink(params, (error) => {
diff --git a/src/talk/plugin-session.ts b/src/talk/plugin-session.ts
index 72668e33aa5f..6ad5bb114285 100644
--- a/src/talk/plugin-session.ts
+++ b/src/talk/plugin-session.ts
@@ -1,8 +1,11 @@
-export const PLUGIN_TALK_AUDIO_FORMAT = {
-  encoding: "pcm16le",
-  sampleRateHz: 24_000,
-  channels: 1,
-} as const;
+import {
+  REALTIME_VOICE_AUDIO_FORMAT_PCM16_24KHZ,
+  type RealtimeVoiceAudioFormat,
+} from "./provider-types.js";
+
+export const PLUGIN_TALK_AUDIO_FORMAT: Readonly<
+  Extract<RealtimeVoiceAudioFormat, { encoding: "pcm16" }>
+> = REALTIME_VOICE_AUDIO_FORMAT_PCM16_24KHZ;
 
 export type PluginTalkSessionEvent =
   | {
@@ -21,12 +24,12 @@ export type PluginTalkSessionEvent =
   | {
       type: "clear";
       generation: number;
-      reason: "barge-in" | "cancel" | "replace" | "hangup" | "error";
+      reason: "barge-in" | "cancel";
     }
   | {
       type: "closed";
       generation: number;
-      reason: "completed" | "error" | "replaced";
+      reason: "completed" | "error";
     };
 
 export type OpenPluginTalkSessionParams = {