diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ff2007352e..2ce3b2393fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,7 @@ Docs: https://docs.openclaw.ai
 - Media delivery: strip persisted base64 audio payloads from webchat history, resolve stored `media://inbound/*` attachments before local-root checks, suppress duplicate Telegram voice/audio sends when TTS emits the same media twice, and support custom image-model IDs that already include their provider prefix.
 - Slack/files: resolve `downloadFile` bot tokens from the runtime config when callers provide `cfg` without an explicit token or prebuilt client, preserving cfg-only file downloads outside the action runtime path. (#70160) Thanks @martingarramon.
 - Slack/HTTP: dispatch registered Request URL webhooks through the same handler registry used by Slack monitor setup, so HTTP-mode Slack events no longer 404 after successful route registration. (#70275) Thanks @FroeMic.
+- Slack/runtime bindings: route focused Slack thread replies through their bound ACP session instead of preparing replies against the default agent shell. Fixes #67739. Thanks @Frankla20.
 - CLI/Claude: verify stored Claude CLI session ids have a readable project transcript before resuming, clearing phantom bindings with `reason=transcript-missing` instead of silently starting fresh under `--resume`. Fixes #70177.
 - CLI sessions: persist CLI session clearing through the atomic session-store merge path, so expired Claude/Codex CLI bindings are actually removed before retrying without the stale session id. (#70298) Thanks @HFConsultant.
 - ACP/sessions_spawn: honor explicit `model` overrides for ACP child sessions instead of silently falling back to the target agent default model. (#70210) Thanks @felix-miao.
diff --git a/extensions/slack/src/monitor/message-handler/prepare.test.ts b/extensions/slack/src/monitor/message-handler/prepare.test.ts
index a40f8fb6d84..ff01e085e7d 100644
--- a/extensions/slack/src/monitor/message-handler/prepare.test.ts
+++ b/extensions/slack/src/monitor/message-handler/prepare.test.ts
@@ -1,6 +1,12 @@
 import fs from "node:fs";
 import type { App } from "@slack/bolt";
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-runtime";
+import {
+  registerSessionBindingAdapter,
+  unregisterSessionBindingAdapter,
+  type SessionBindingAdapter,
+  type SessionBindingRecord,
+} from "openclaw/plugin-sdk/conversation-runtime";
 import { resolveAgentRoute } from "openclaw/plugin-sdk/routing";
 import { resolveThreadSessionKeys } from "openclaw/plugin-sdk/routing";
 import { expectChannelInboundContextContract as expectInboundContextContract } from "openclaw/plugin-sdk/testing";
@@ -592,6 +598,76 @@ describe("slack prepareSlackMessage inbound contract", () => {
     // MessageThreadId should be set for the reply
     expect(prepared!.ctxPayload.MessageThreadId).toBe("500.000");
   });
+
+  it("routes Slack thread replies through runtime conversation bindings", async () => {
+    const targetSessionKey = "agent:review:acp:session-67739";
+    const binding: SessionBindingRecord = {
+      bindingId: "test-binding",
+      targetSessionKey,
+      targetKind: "session",
+      conversation: {
+        channel: "slack",
+        accountId: "default",
+        conversationId: "100.000",
+        parentConversationId: "C123",
+      },
+      status: "active",
+      boundAt: Date.now(),
+      metadata: {},
+    };
+    const resolveByConversation: SessionBindingAdapter["resolveByConversation"] = vi.fn((ref) =>
+      ref.channel === "slack" &&
+      ref.accountId === "default" &&
+      ref.conversationId === "100.000" &&
+      ref.parentConversationId === "C123"
+        ? binding
+        : null,
+    );
+    const touch: NonNullable<SessionBindingAdapter["touch"]> = vi.fn();
+    const adapter: SessionBindingAdapter = {
+      channel: "slack",
+      accountId: "default",
+      listBySession: () => [],
+      resolveByConversation,
+      touch,
+    };
+    registerSessionBindingAdapter(adapter);
+    try {
+      const replies = vi.fn().mockResolvedValue({
+        messages: [{ text: "starter", user: "U2", ts: "100.000" }],
+        response_metadata: { next_cursor: "" },
+      });
+      const slackCtx = createThreadSlackCtx({
+        cfg: {
+          channels: { slack: { enabled: true, replyToMode: "all", groupPolicy: "open" } },
+        } as OpenClawConfig,
+        replies,
+      });
+      slackCtx.resolveUserName = async () => ({ name: "Alice" });
+      slackCtx.resolveChannelName = async () => ({ name: "general", type: "channel" });
+
+      const prepared = await prepareThreadMessage(slackCtx, {
+        text: "bound reply",
+        ts: "101.000",
+        thread_ts: "100.000",
+      });
+
+      expect(prepared).toBeTruthy();
+      expect(prepared!.route.sessionKey).toBe(targetSessionKey);
+      expect(prepared!.route.agentId).toBe("review");
+      expect(prepared!.ctxPayload.SessionKey).toBe(targetSessionKey);
+      expect(prepared!.ctxPayload.ParentSessionKey).toBeUndefined();
+      expect(resolveByConversation).toHaveBeenCalledWith({
+        channel: "slack",
+        accountId: "default",
+        conversationId: "100.000",
+        parentConversationId: "C123",
+      });
+      expect(touch).toHaveBeenCalledWith("test-binding", undefined);
+    } finally {
+      unregisterSessionBindingAdapter({ channel: "slack", accountId: "default", adapter });
+    }
+  });
 });
 
 describe("prepareSlackMessage sender prefix", () => {
diff --git a/extensions/slack/src/monitor/message-handler/prepare.ts b/extensions/slack/src/monitor/message-handler/prepare.ts
index bfc20340413..19e533e43e1 100644
--- a/extensions/slack/src/monitor/message-handler/prepare.ts
+++ b/extensions/slack/src/monitor/message-handler/prepare.ts
@@ -15,6 +15,10 @@ import {
 import { resolveControlCommandGate } from "openclaw/plugin-sdk/command-auth";
 import { hasControlCommand } from "openclaw/plugin-sdk/command-auth";
 import { shouldHandleTextCommands } from "openclaw/plugin-sdk/command-auth";
+import {
+  resolveRuntimeConversationBindingRoute,
+  type RuntimeConversationBindingRouteResult,
+} from "openclaw/plugin-sdk/conversation-runtime";
 import { formatErrorMessage } from "openclaw/plugin-sdk/error-runtime";
 import { enqueueSystemEvent } from "openclaw/plugin-sdk/infra-runtime";
 import {
@@ -106,6 +110,7 @@ type SlackAuthorizationContext = {
 
 type SlackRoutingContext = {
   route: ReturnType<typeof resolveAgentRoute>;
+  runtimeBinding: RuntimeConversationBindingRouteResult["bindingRecord"];
   chatType: "direct" | "group" | "channel";
   replyToMode: ReturnType<typeof resolveSlackReplyToMode>;
   threadContext: ReturnType<typeof resolveSlackThreadContext>;
@@ -116,6 +121,15 @@ type SlackRoutingContext = {
   historyKey: string;
 };
 
+function resolveSlackBaseConversationId(params: {
+  message: SlackMessageEvent;
+  isDirectMessage: boolean;
+}): string {
+  return params.isDirectMessage
+    ? `user:${params.message.user ?? "unknown"}`
+    : params.message.channel;
+}
+
 async function resolveSlackConversationContext(params: {
   ctx: SlackMonitorContext;
   account: ResolvedSlackAccount;
@@ -272,7 +286,7 @@ function resolveSlackRoutingContext(params: {
   isRoomish: boolean;
 }): SlackRoutingContext {
   const { ctx, account, message, isDirectMessage, isGroupDm, isRoom, isRoomish } = params;
-  const route = resolveAgentRoute({
+  let route = resolveAgentRoute({
     cfg: ctx.cfg,
     channel: "slack",
     accountId: account.accountId,
@@ -302,17 +316,45 @@ function resolveSlackRoutingContext(params: {
   // isolated sessions per message (regression from #10686).
   const roomThreadId = isThreadReply && threadTs ? threadTs : undefined;
   const canonicalThreadId = isRoomish ? roomThreadId : isThreadReply ? threadTs : autoThreadId;
-  const threadKeys = resolveThreadSessionKeys({
-    baseSessionKey: route.sessionKey,
-    threadId: canonicalThreadId,
-    parentSessionKey: canonicalThreadId && ctx.threadInheritParent ? route.sessionKey : undefined,
-  });
+  const baseConversationId = resolveSlackBaseConversationId({ message, isDirectMessage });
+  const boundThreadRoute = canonicalThreadId
+    ? resolveRuntimeConversationBindingRoute({
+        route,
+        conversation: {
+          channel: "slack",
+          accountId: account.accountId,
+          conversationId: canonicalThreadId,
+          parentConversationId: baseConversationId,
+        },
+      })
+    : null;
+  const runtimeRoute =
+    boundThreadRoute?.boundSessionKey || boundThreadRoute?.bindingRecord
+      ? boundThreadRoute
+      : resolveRuntimeConversationBindingRoute({
+          route,
+          conversation: {
+            channel: "slack",
+            accountId: account.accountId,
+            conversationId: baseConversationId,
+          },
+        });
+  route = runtimeRoute.route;
+  const threadKeys = runtimeRoute.boundSessionKey
+    ? { sessionKey: route.sessionKey, parentSessionKey: undefined }
+    : resolveThreadSessionKeys({
+        baseSessionKey: route.sessionKey,
+        threadId: canonicalThreadId,
+        parentSessionKey:
+          canonicalThreadId && ctx.threadInheritParent ? route.sessionKey : undefined,
+      });
   const sessionKey = threadKeys.sessionKey;
   const historyKey =
     isThreadReply && ctx.threadHistoryScope === "thread" ? sessionKey : message.channel;
 
   return {
     route,
+    runtimeBinding: runtimeRoute.bindingRecord,
     chatType,
     replyToMode,
     threadContext,
@@ -364,6 +406,7 @@ export async function prepareSlackMessage(params: {
   });
   const {
     route,
+    runtimeBinding,
     replyToMode,
     threadContext,
     threadTs,
@@ -372,6 +415,11 @@ export async function prepareSlackMessage(params: {
     sessionKey,
     historyKey,
   } = routing;
+  if (runtimeBinding && shouldLogVerbose()) {
+    logVerbose(
+      `slack: routed via bound conversation ${runtimeBinding.conversation.conversationId} -> ${runtimeBinding.targetSessionKey}`,
+    );
+  }
 
   const mentionRegexes = resolveCachedMentionRegexes(ctx, route.agentId);
   const hasAnyMention = /<@[^>]+>/.test(message.text ?? "");
diff --git a/src/channels/plugins/binding-routing.ts b/src/channels/plugins/binding-routing.ts
index cbfb84b37b2..cf06eb4668f 100644
--- a/src/channels/plugins/binding-routing.ts
+++ b/src/channels/plugins/binding-routing.ts
@@ -1,5 +1,9 @@
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
-import type { ConversationRef } from "../../infra/outbound/session-binding-service.js";
+import {
+  getSessionBindingService,
+  type ConversationRef,
+  type SessionBindingRecord,
+} from "../../infra/outbound/session-binding-service.js";
 import type { ResolvedAgentRoute } from "../../routing/resolve-route.js";
 import { deriveLastRoutePolicy } from "../../routing/resolve-route.js";
 import { resolveAgentIdFromSessionKey } from "../../routing/session-key.js";
@@ -14,6 +18,13 @@ export type ConfiguredBindingRouteResult = {
   boundAgentId?: string;
 };
 
+export type RuntimeConversationBindingRouteResult = {
+  bindingRecord: SessionBindingRecord | null;
+  route: ResolvedAgentRoute;
+  boundSessionKey?: string;
+  boundAgentId?: string;
+};
+
 type ConfiguredBindingRouteConversationInput =
   | {
       conversation: ConversationRef;
@@ -39,6 +50,18 @@ function resolveConfiguredBindingConversationRef(
   };
 }
 
+function isPluginOwnedRuntimeBindingRecord(record: SessionBindingRecord | null): boolean {
+  const metadata = record?.metadata;
+  if (!metadata || typeof metadata !== "object") {
+    return false;
+  }
+  return (
+    metadata.pluginBindingOwner === "plugin" &&
+    typeof metadata.pluginId === "string" &&
+    typeof metadata.pluginRoot === "string"
+  );
+}
+
 export function resolveConfiguredBindingRoute(
   params: {
     cfg: OpenClawConfig;
@@ -83,6 +106,48 @@ export function resolveConfiguredBindingRoute(
   };
 }
 
+export function resolveRuntimeConversationBindingRoute(
+  params: {
+    route: ResolvedAgentRoute;
+  } & ConfiguredBindingRouteConversationInput,
+): RuntimeConversationBindingRouteResult {
+  const bindingRecord = getSessionBindingService().resolveByConversation(
+    resolveConfiguredBindingConversationRef(params),
+  );
+  const boundSessionKey = bindingRecord?.targetSessionKey?.trim();
+  if (!bindingRecord || !boundSessionKey) {
+    return {
+      bindingRecord: null,
+      route: params.route,
+    };
+  }
+
+  getSessionBindingService().touch(bindingRecord.bindingId);
+  if (isPluginOwnedRuntimeBindingRecord(bindingRecord)) {
+    return {
+      bindingRecord,
+      route: params.route,
+    };
+  }
+
+  const boundAgentId = resolveAgentIdFromSessionKey(boundSessionKey) || params.route.agentId;
+  return {
+    bindingRecord,
+    boundSessionKey,
+    boundAgentId,
+    route: {
+      ...params.route,
+      sessionKey: boundSessionKey,
+      agentId: boundAgentId,
+      lastRoutePolicy: deriveLastRoutePolicy({
+        sessionKey: boundSessionKey,
+        mainSessionKey: params.route.mainSessionKey,
+      }),
+      matchedBy: "binding.channel",
+    },
+  };
+}
+
 export async function ensureConfiguredBindingRouteReady(params: {
   cfg: OpenClawConfig;
   bindingResolution: ConfiguredBindingResolution | null;
diff --git a/src/plugin-sdk/conversation-binding-runtime.ts b/src/plugin-sdk/conversation-binding-runtime.ts
index a3ffeab7005..86d84a95450 100644
--- a/src/plugin-sdk/conversation-binding-runtime.ts
+++ b/src/plugin-sdk/conversation-binding-runtime.ts
@@ -2,6 +2,8 @@ export {
   ensureConfiguredBindingRouteReady,
   resolveConfiguredBindingRoute,
   type ConfiguredBindingRouteResult,
+  resolveRuntimeConversationBindingRoute,
+  type RuntimeConversationBindingRouteResult,
 } from "../channels/plugins/binding-routing.js";
 export {
   type SessionBindingRecord,
diff --git a/src/plugin-sdk/conversation-runtime.ts b/src/plugin-sdk/conversation-runtime.ts
index 5658036e285..51a7fea2a77 100644
--- a/src/plugin-sdk/conversation-runtime.ts
+++ b/src/plugin-sdk/conversation-runtime.ts
@@ -13,6 +13,8 @@ export {
   ensureConfiguredBindingRouteReady,
   resolveConfiguredBindingRoute,
   type ConfiguredBindingRouteResult,
+  resolveRuntimeConversationBindingRoute,
+  type RuntimeConversationBindingRouteResult,
 } from "../channels/plugins/binding-routing.js";
 export {
   primeConfiguredBindingRegistry,