Add /btw side questions (#45444)

* feat(agent): add /btw side questions

* fix(agent): gate and log /btw reviews

* feat(btw): isolate side-question delivery

* test(reply): update route reply runtime mocks

* fix(btw): complete side-result delivery across clients

* fix(gateway): handle streamed btw side results

* fix(telegram): unblock btw side questions

* fix(reply): make external btw replies explicit

* fix(chat): keep btw side results ephemeral in internal history

* fix(btw): address remaining review feedback

* fix(chat): preserve btw history on mobile refresh

* fix(acp): keep btw replies out of prompt history

* refactor(btw): narrow side questions to live channels

* fix(btw): preserve channel typing indicators

* fix(btw): keep side questions isolated in chat

* fix(outbound): restore typed channel send deps

* fix(btw): avoid blocking replies on transcript persistence

* fix(btw): keep side questions fast

* docs(commands): document btw slash command

* docs(changelog): add btw side questions entry

* test(outbound): align session transcript mocks

CHANGELOG.md

@@ -6,7 +6,7 @@ Docs: https://docs.openclaw.ai
 
 ### Changes
 
-- Placeholder: replace with the first 2026.3.14 user-facing change.
+- Commands/btw: add `/btw` side questions for quick tool-less answers about the current session without changing future session context, with dismissible in-session TUI answers and explicit BTW replies on external channels. (#45444) Thanks @ngutman.
 - Refactor/channels: remove the legacy channel shim directories and point channel-specific imports directly at the extension-owned implementations. (#45967) thanks @scoootscooob.
 
 ### Fixes

docs/tools/slash-commands.md

@@ -76,6 +76,7 @@ Text + native (when enabled):
 - `/allowlist` (list/add/remove allowlist entries)
 - `/approve <id> allow-once|allow-always|deny` (resolve exec approval prompts)
 - `/context [list|detail|json]` (explain “context”; `detail` shows per-file + per-tool + per-skill + system prompt size)
+- `/btw <question>` (ask a quick side question about the current session without changing future session context)
 - `/export-session [path]` (alias: `/export`) (export current session to HTML with full system prompt)
 - `/whoami` (show your sender id; alias: `/id`)
 - `/session idle <duration|off>` (manage inactivity auto-unfocus for focused thread bindings)

extensions/telegram/src/sequential-key.test.ts

@@ -60,6 +60,20 @@ describe("getTelegramSequentialKey", () => {
       "telegram:123:control",
     ],
     [{ message: mockMessage({ chat: mockChat({ id: 123 }), text: "/status" }) }, "telegram:123"],
+    [
+      { message: mockMessage({ chat: mockChat({ id: 123 }), text: "/btw what is the time?" }) },
+      "telegram:123:btw:1",
+    ],
+    [
+      {
+        me: { username: "openclaw_bot" } as never,
+        message: mockMessage({
+          chat: mockChat({ id: 123 }),
+          text: "/btw@openclaw_bot what is the time?",
+        }),
+      },
+      "telegram:123:btw:1",
+    ],
     [
       { message: mockMessage({ chat: mockChat({ id: 123 }), text: "stop" }) },
       "telegram:123:control",

extensions/telegram/src/sequential-key.ts

@@ -1,5 +1,6 @@
 import { type Message, type UserFromGetMe } from "@grammyjs/types";
 import { isAbortRequestText } from "../../../src/auto-reply/reply/abort.js";
+import { isBtwRequestText } from "../../../src/auto-reply/reply/btw-command.js";
 import { resolveTelegramForumThreadId } from "./bot/helpers.js";
 
 export type TelegramSequentialKeyContext = {
@@ -41,6 +42,16 @@ export function getTelegramSequentialKey(ctx: TelegramSequentialKeyContext): str
     }
     return "telegram:control";
   }
+  if (isBtwRequestText(rawText, botUsername ? { botUsername } : undefined)) {
+    const messageId = msg?.message_id;
+    if (typeof chatId === "number" && typeof messageId === "number") {
+      return `telegram:${chatId}:btw:${messageId}`;
+    }
+    if (typeof chatId === "number") {
+      return `telegram:${chatId}:btw`;
+    }
+    return "telegram:btw";
+  }
   const isGroup = msg?.chat?.type === "group" || msg?.chat?.type === "supergroup";
   const messageThreadId = msg?.message_thread_id;
   const isForum = msg?.chat?.is_forum;

extensions/whatsapp/src/auto-reply/monitor/process-message.inbound-contract.test.ts

@@ -308,6 +308,21 @@ describe("web processMessage inbound contract", () => {
     expect(replyOptions?.disableBlockStreaming).toBe(true);
   });
 
+  it("passes sendComposing through as the reply typing callback", async () => {
+    const sendComposing = vi.fn(async () => undefined);
+    const args = createWhatsAppDirectStreamingArgs();
+    args.msg = {
+      ...args.msg,
+      sendComposing,
+    };
+
+    await processMessage(args);
+
+    // oxlint-disable-next-line typescript/no-explicit-any
+    const dispatcherOptions = (capturedDispatchParams as any)?.dispatcherOptions;
+    expect(dispatcherOptions?.onReplyStart).toBe(sendComposing);
+  });
+
   it("updates main last route for DM when session key matches main session key", async () => {
     const updateLastRouteMock = vi.mocked(updateLastRouteInBackground);
     updateLastRouteMock.mockClear();

extensions/whatsapp/src/outbound-adapter.ts

@@ -42,7 +42,7 @@ export const whatsappOutbound: ChannelOutboundAdapter = {
       return { channel: "whatsapp", messageId: "" };
     }
     const send =
-      resolveOutboundSendDep<typeof sendMessageWhatsApp>(deps, "whatsapp") ??
+      resolveOutboundSendDep<typeof import("./send.js").sendMessageWhatsApp>(deps, "whatsapp") ??
       (await import("./send.js")).sendMessageWhatsApp;
     const result = await send(to, normalizedText, {
       verbose: false,
@@ -55,7 +55,7 @@ export const whatsappOutbound: ChannelOutboundAdapter = {
   sendMedia: async ({ cfg, to, text, mediaUrl, mediaLocalRoots, accountId, deps, gifPlayback }) => {
     const normalizedText = trimLeadingWhitespace(text);
     const send =
-      resolveOutboundSendDep<typeof sendMessageWhatsApp>(deps, "whatsapp") ??
+      resolveOutboundSendDep<typeof import("./send.js").sendMessageWhatsApp>(deps, "whatsapp") ??
       (await import("./send.js")).sendMessageWhatsApp;
     const result = await send(to, normalizedText, {
       verbose: false,

src/agents/btw.test.ts

@@ -0,0 +1,829 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { SessionEntry } from "../config/sessions.js";
+
+const streamSimpleMock = vi.fn();
+const appendCustomEntryMock = vi.fn();
+const buildSessionContextMock = vi.fn();
+const getLeafEntryMock = vi.fn();
+const branchMock = vi.fn();
+const resetLeafMock = vi.fn();
+const ensureOpenClawModelsJsonMock = vi.fn();
+const discoverAuthStorageMock = vi.fn();
+const discoverModelsMock = vi.fn();
+const resolveModelWithRegistryMock = vi.fn();
+const getApiKeyForModelMock = vi.fn();
+const requireApiKeyMock = vi.fn();
+const acquireSessionWriteLockMock = vi.fn();
+const resolveSessionAuthProfileOverrideMock = vi.fn();
+const getActiveEmbeddedRunSnapshotMock = vi.fn();
+const waitForEmbeddedPiRunEndMock = vi.fn();
+const diagWarnMock = vi.fn();
+const diagDebugMock = vi.fn();
+
+vi.mock("@mariozechner/pi-ai", () => ({
+  streamSimple: (...args: unknown[]) => streamSimpleMock(...args),
+}));
+
+vi.mock("@mariozechner/pi-coding-agent", () => ({
+  SessionManager: {
+    open: () => ({
+      getLeafEntry: getLeafEntryMock,
+      branch: branchMock,
+      resetLeaf: resetLeafMock,
+      buildSessionContext: buildSessionContextMock,
+      appendCustomEntry: appendCustomEntryMock,
+    }),
+  },
+}));
+
+vi.mock("./models-config.js", () => ({
+  ensureOpenClawModelsJson: (...args: unknown[]) => ensureOpenClawModelsJsonMock(...args),
+}));
+
+vi.mock("./pi-model-discovery.js", () => ({
+  discoverAuthStorage: (...args: unknown[]) => discoverAuthStorageMock(...args),
+  discoverModels: (...args: unknown[]) => discoverModelsMock(...args),
+}));
+
+vi.mock("./pi-embedded-runner/model.js", () => ({
+  resolveModelWithRegistry: (...args: unknown[]) => resolveModelWithRegistryMock(...args),
+}));
+
+vi.mock("./model-auth.js", () => ({
+  getApiKeyForModel: (...args: unknown[]) => getApiKeyForModelMock(...args),
+  requireApiKey: (...args: unknown[]) => requireApiKeyMock(...args),
+}));
+
+vi.mock("./session-write-lock.js", () => ({
+  acquireSessionWriteLock: (...args: unknown[]) => acquireSessionWriteLockMock(...args),
+}));
+
+vi.mock("./pi-embedded-runner/runs.js", () => ({
+  getActiveEmbeddedRunSnapshot: (...args: unknown[]) => getActiveEmbeddedRunSnapshotMock(...args),
+  waitForEmbeddedPiRunEnd: (...args: unknown[]) => waitForEmbeddedPiRunEndMock(...args),
+}));
+
+vi.mock("./auth-profiles/session-override.js", () => ({
+  resolveSessionAuthProfileOverride: (...args: unknown[]) =>
+    resolveSessionAuthProfileOverrideMock(...args),
+}));
+
+vi.mock("../logging/diagnostic.js", () => ({
+  diagnosticLogger: {
+    warn: (...args: unknown[]) => diagWarnMock(...args),
+    debug: (...args: unknown[]) => diagDebugMock(...args),
+  },
+}));
+
+const { BTW_CUSTOM_TYPE, runBtwSideQuestion } = await import("./btw.js");
+
+function makeAsyncEvents(events: unknown[]) {
+  return {
+    async *[Symbol.asyncIterator]() {
+      for (const event of events) {
+        yield event;
+      }
+    },
+  };
+}
+
+function createSessionEntry(overrides: Partial<SessionEntry> = {}): SessionEntry {
+  return {
+    sessionId: "session-1",
+    sessionFile: "session-1.jsonl",
+    updatedAt: Date.now(),
+    ...overrides,
+  };
+}
+
+describe("runBtwSideQuestion", () => {
+  beforeEach(() => {
+    streamSimpleMock.mockReset();
+    appendCustomEntryMock.mockReset();
+    buildSessionContextMock.mockReset();
+    getLeafEntryMock.mockReset();
+    branchMock.mockReset();
+    resetLeafMock.mockReset();
+    ensureOpenClawModelsJsonMock.mockReset();
+    discoverAuthStorageMock.mockReset();
+    discoverModelsMock.mockReset();
+    resolveModelWithRegistryMock.mockReset();
+    getApiKeyForModelMock.mockReset();
+    requireApiKeyMock.mockReset();
+    acquireSessionWriteLockMock.mockReset();
+    resolveSessionAuthProfileOverrideMock.mockReset();
+    getActiveEmbeddedRunSnapshotMock.mockReset();
+    waitForEmbeddedPiRunEndMock.mockReset();
+    diagWarnMock.mockReset();
+    diagDebugMock.mockReset();
+
+    buildSessionContextMock.mockReturnValue({
+      messages: [{ role: "user", content: [{ type: "text", text: "hi" }], timestamp: 1 }],
+    });
+    getLeafEntryMock.mockReturnValue(null);
+    resolveModelWithRegistryMock.mockReturnValue({
+      provider: "anthropic",
+      id: "claude-sonnet-4-5",
+      api: "anthropic-messages",
+    });
+    getApiKeyForModelMock.mockResolvedValue({ apiKey: "secret", mode: "api-key", source: "test" });
+    requireApiKeyMock.mockReturnValue("secret");
+    acquireSessionWriteLockMock.mockResolvedValue({
+      release: vi.fn().mockResolvedValue(undefined),
+    });
+    resolveSessionAuthProfileOverrideMock.mockResolvedValue("profile-1");
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue(undefined);
+    waitForEmbeddedPiRunEndMock.mockResolvedValue(true);
+  });
+
+  it("streams blocks and persists a non-context custom entry", async () => {
+    const onBlockReply = vi.fn().mockResolvedValue(undefined);
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "text_delta",
+          delta: "Side answer.",
+          partial: {
+            role: "assistant",
+            content: [],
+            provider: "anthropic",
+            model: "claude-sonnet-4-5",
+          },
+        },
+        {
+          type: "text_end",
+          content: "Side answer.",
+          contentIndex: 0,
+          partial: {
+            role: "assistant",
+            content: [],
+            provider: "anthropic",
+            model: "claude-sonnet-4-5",
+          },
+        },
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "Side answer." }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What changed?",
+      sessionEntry: createSessionEntry(),
+      sessionStore: {},
+      sessionKey: "agent:main:main",
+      storePath: "/tmp/sessions.json",
+      resolvedThinkLevel: "low",
+      resolvedReasoningLevel: "off",
+      blockReplyChunking: {
+        minChars: 1,
+        maxChars: 200,
+        breakPreference: "paragraph",
+      },
+      resolvedBlockStreamingBreak: "text_end",
+      opts: { onBlockReply },
+      isNewSession: false,
+    });
+
+    expect(result).toBeUndefined();
+    expect(onBlockReply).toHaveBeenCalledWith({
+      text: "Side answer.",
+      btw: { question: "What changed?" },
+    });
+    await vi.waitFor(() => {
+      expect(appendCustomEntryMock).toHaveBeenCalledWith(
+        BTW_CUSTOM_TYPE,
+        expect.objectContaining({
+          question: "What changed?",
+          answer: "Side answer.",
+          provider: "anthropic",
+          model: "claude-sonnet-4-5",
+        }),
+      );
+    });
+  });
+
+  it("returns a final payload when block streaming is unavailable", async () => {
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "Final answer." }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What changed?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(result).toEqual({ text: "Final answer." });
+  });
+
+  it("fails when the current branch has no messages", async () => {
+    buildSessionContextMock.mockReturnValue({ messages: [] });
+    streamSimpleMock.mockReturnValue(makeAsyncEvents([]));
+
+    await expect(
+      runBtwSideQuestion({
+        cfg: {} as never,
+        agentDir: "/tmp/agent",
+        provider: "anthropic",
+        model: "claude-sonnet-4-5",
+        question: "What changed?",
+        sessionEntry: createSessionEntry(),
+        resolvedReasoningLevel: "off",
+        opts: {},
+        isNewSession: false,
+      }),
+    ).rejects.toThrow("No active session context.");
+  });
+
+  it("uses active-run snapshot messages for BTW context while the main run is in flight", async () => {
+    buildSessionContextMock.mockReturnValue({ messages: [] });
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue({
+      transcriptLeafId: "assistant-1",
+      messages: [
+        {
+          role: "user",
+          content: [
+            { type: "text", text: "write some things then wait 30 seconds and write more" },
+          ],
+          timestamp: 1,
+        },
+      ],
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(result).toEqual({ text: "323" });
+    expect(streamSimpleMock).toHaveBeenCalledWith(
+      expect.anything(),
+      expect.objectContaining({
+        systemPrompt: expect.stringContaining("ephemeral /btw side question"),
+        messages: expect.arrayContaining([
+          expect.objectContaining({ role: "user" }),
+          expect.objectContaining({
+            role: "user",
+            content: [
+              {
+                type: "text",
+                text: expect.stringContaining(
+                  "<btw_side_question>\nWhat is 17 * 19?\n</btw_side_question>",
+                ),
+              },
+            ],
+          }),
+        ]),
+      }),
+      expect.anything(),
+    );
+  });
+
+  it("uses the in-flight prompt as background only when there is no prior transcript context", async () => {
+    buildSessionContextMock.mockReturnValue({ messages: [] });
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue({
+      transcriptLeafId: null,
+      messages: [],
+      inFlightPrompt: "build me a tic-tac-toe game in brainfuck",
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "You're building a tic-tac-toe game in Brainfuck." }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "what are we doing?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(result).toEqual({ text: "You're building a tic-tac-toe game in Brainfuck." });
+    expect(streamSimpleMock).toHaveBeenCalledWith(
+      expect.anything(),
+      expect.objectContaining({
+        messages: [
+          expect.objectContaining({
+            role: "user",
+            content: [
+              {
+                type: "text",
+                text: expect.stringContaining(
+                  "<in_flight_main_task>\nbuild me a tic-tac-toe game in brainfuck\n</in_flight_main_task>",
+                ),
+              },
+            ],
+          }),
+        ],
+      }),
+      expect.anything(),
+    );
+  });
+
+  it("wraps the side question so the model does not treat it as a main-task continuation", async () => {
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "About 93 million miles." }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "what is the distance to the sun?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    const [, context] = streamSimpleMock.mock.calls[0] ?? [];
+    expect(context).toMatchObject({
+      systemPrompt: expect.stringContaining(
+        "Do not continue, resume, or complete any unfinished task",
+      ),
+    });
+    expect(context).toMatchObject({
+      messages: expect.arrayContaining([
+        expect.objectContaining({
+          role: "user",
+          content: [
+            {
+              type: "text",
+              text: expect.stringContaining(
+                "Ignore any unfinished task in the conversation while answering it.",
+              ),
+            },
+          ],
+        }),
+      ]),
+    });
+  });
+
+  it("branches away from an unresolved trailing user turn before building BTW context", async () => {
+    getLeafEntryMock.mockReturnValue({
+      type: "message",
+      parentId: "assistant-1",
+      message: { role: "user" },
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(branchMock).toHaveBeenCalledWith("assistant-1");
+    expect(resetLeafMock).not.toHaveBeenCalled();
+    expect(buildSessionContextMock).toHaveBeenCalledTimes(1);
+    expect(result).toEqual({ text: "323" });
+  });
+
+  it("branches to the active run snapshot leaf when the session is busy", async () => {
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue({
+      transcriptLeafId: "assistant-seed",
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(branchMock).toHaveBeenCalledWith("assistant-seed");
+    expect(getLeafEntryMock).not.toHaveBeenCalled();
+    expect(result).toEqual({ text: "323" });
+  });
+
+  it("falls back when the active run snapshot leaf no longer exists", async () => {
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue({
+      transcriptLeafId: "assistant-gone",
+    });
+    branchMock.mockImplementationOnce(() => {
+      throw new Error("Entry 3235c7c4 not found");
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(branchMock).toHaveBeenCalledWith("assistant-gone");
+    expect(resetLeafMock).toHaveBeenCalled();
+    expect(result).toEqual({ text: "323" });
+    expect(diagDebugMock).toHaveBeenCalledWith(
+      expect.stringContaining("btw snapshot leaf unavailable: sessionId=session-1"),
+    );
+  });
+
+  it("returns the BTW answer and retries transcript persistence after a session lock", async () => {
+    acquireSessionWriteLockMock
+      .mockRejectedValueOnce(
+        new Error("session file locked (timeout 250ms): pid=123 /tmp/session.lock"),
+      )
+      .mockResolvedValueOnce({
+        release: vi.fn().mockResolvedValue(undefined),
+      });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(result).toEqual({ text: "323" });
+    await vi.waitFor(() => {
+      expect(waitForEmbeddedPiRunEndMock).toHaveBeenCalledWith("session-1", 30000);
+      expect(appendCustomEntryMock).toHaveBeenCalledWith(
+        BTW_CUSTOM_TYPE,
+        expect.objectContaining({
+          question: "What is 17 * 19?",
+          answer: "323",
+        }),
+      );
+    });
+  });
+
+  it("logs deferred persistence failures through the diagnostic logger", async () => {
+    acquireSessionWriteLockMock
+      .mockRejectedValueOnce(
+        new Error("session file locked (timeout 250ms): pid=123 /tmp/session.lock"),
+      )
+      .mockRejectedValueOnce(
+        new Error("session file locked (timeout 10000ms): pid=123 /tmp/session.lock"),
+      );
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    const result = await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    expect(result).toEqual({ text: "323" });
+    await vi.waitFor(() => {
+      expect(diagWarnMock).toHaveBeenCalledWith(
+        expect.stringContaining("btw transcript persistence skipped: sessionId=session-1"),
+      );
+    });
+  });
+
+  it("excludes tool results from BTW context to avoid replaying raw tool output", async () => {
+    getActiveEmbeddedRunSnapshotMock.mockReturnValue({
+      transcriptLeafId: "assistant-1",
+      messages: [
+        {
+          role: "user",
+          content: [{ type: "text", text: "seed" }],
+          timestamp: 1,
+        },
+        {
+          role: "toolResult",
+          content: [{ type: "text", text: "sensitive tool output" }],
+          details: { raw: "secret" },
+          timestamp: 2,
+        },
+        {
+          role: "assistant",
+          content: [{ type: "text", text: "done" }],
+          timestamp: 3,
+        },
+      ],
+    });
+    streamSimpleMock.mockReturnValue(
+      makeAsyncEvents([
+        {
+          type: "done",
+          reason: "stop",
+          message: {
+            role: "assistant",
+            content: [{ type: "text", text: "323" }],
+            provider: "anthropic",
+            api: "anthropic-messages",
+            model: "claude-sonnet-4-5",
+            stopReason: "stop",
+            usage: {
+              input: 1,
+              output: 2,
+              cacheRead: 0,
+              cacheWrite: 0,
+              totalTokens: 3,
+              cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+            },
+            timestamp: Date.now(),
+          },
+        },
+      ]),
+    );
+
+    await runBtwSideQuestion({
+      cfg: {} as never,
+      agentDir: "/tmp/agent",
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      question: "What is 17 * 19?",
+      sessionEntry: createSessionEntry(),
+      resolvedReasoningLevel: "off",
+      opts: {},
+      isNewSession: false,
+    });
+
+    const [, context] = streamSimpleMock.mock.calls[0] ?? [];
+    expect(context).toMatchObject({
+      messages: [
+        expect.objectContaining({ role: "user" }),
+        expect.objectContaining({ role: "assistant" }),
+        expect.objectContaining({ role: "user" }),
+      ],
+    });
+    expect((context as { messages?: Array<{ role?: string }> }).messages).not.toEqual(
+      expect.arrayContaining([expect.objectContaining({ role: "toolResult" })]),
+    );
+  });
+});

src/agents/btw.ts

@@ -0,0 +1,513 @@
+import {
+  streamSimple,
+  type Api,
+  type AssistantMessageEvent,
+  type ThinkingLevel as SimpleThinkingLevel,
+  type Message,
+  type Model,
+} from "@mariozechner/pi-ai";
+import { SessionManager } from "@mariozechner/pi-coding-agent";
+import type { ReasoningLevel, ThinkLevel } from "../auto-reply/thinking.js";
+import type { GetReplyOptions, ReplyPayload } from "../auto-reply/types.js";
+import type { OpenClawConfig } from "../config/config.js";
+import {
+  resolveSessionFilePath,
+  resolveSessionFilePathOptions,
+  type SessionEntry,
+} from "../config/sessions.js";
+import { diagnosticLogger as diag } from "../logging/diagnostic.js";
+import { resolveSessionAuthProfileOverride } from "./auth-profiles/session-override.js";
+import { getApiKeyForModel, requireApiKey } from "./model-auth.js";
+import { ensureOpenClawModelsJson } from "./models-config.js";
+import { EmbeddedBlockChunker, type BlockReplyChunking } from "./pi-embedded-block-chunker.js";
+import { resolveModelWithRegistry } from "./pi-embedded-runner/model.js";
+import {
+  getActiveEmbeddedRunSnapshot,
+  waitForEmbeddedPiRunEnd,
+} from "./pi-embedded-runner/runs.js";
+import { mapThinkingLevel } from "./pi-embedded-runner/utils.js";
+import { discoverAuthStorage, discoverModels } from "./pi-model-discovery.js";
+import { stripToolResultDetails } from "./session-transcript-repair.js";
+import { acquireSessionWriteLock } from "./session-write-lock.js";
+
+const BTW_CUSTOM_TYPE = "openclaw:btw";
+const BTW_PERSIST_TIMEOUT_MS = 250;
+const BTW_PERSIST_RETRY_WAIT_MS = 30_000;
+const BTW_PERSIST_RETRY_LOCK_MS = 10_000;
+
+type SessionManagerLike = {
+  getLeafEntry?: () => {
+    id?: string;
+    type?: string;
+    parentId?: string | null;
+    message?: { role?: string };
+  } | null;
+  branch?: (parentId: string) => void;
+  resetLeaf?: () => void;
+  buildSessionContext: () => { messages?: unknown[] };
+};
+
+type BtwCustomEntryData = {
+  timestamp: number;
+  question: string;
+  answer: string;
+  provider: string;
+  model: string;
+  thinkingLevel: ThinkLevel | "off";
+  reasoningLevel: ReasoningLevel;
+  sessionKey?: string;
+  authProfileId?: string;
+  authProfileIdSource?: "auto" | "user";
+  usage?: unknown;
+};
+
+async function appendBtwCustomEntry(params: {
+  sessionFile: string;
+  timeoutMs: number;
+  entry: BtwCustomEntryData;
+}) {
+  const lock = await acquireSessionWriteLock({
+    sessionFile: params.sessionFile,
+    timeoutMs: params.timeoutMs,
+    allowReentrant: false,
+  });
+  try {
+    const persisted = SessionManager.open(params.sessionFile);
+    persisted.appendCustomEntry(BTW_CUSTOM_TYPE, params.entry);
+  } finally {
+    await lock.release();
+  }
+}
+
+function isSessionLockError(error: unknown): boolean {
+  const message = error instanceof Error ? error.message : String(error);
+  return message.includes("session file locked");
+}
+
+function deferBtwCustomEntryPersist(params: {
+  sessionId: string;
+  sessionFile: string;
+  entry: BtwCustomEntryData;
+}) {
+  void (async () => {
+    try {
+      await waitForEmbeddedPiRunEnd(params.sessionId, BTW_PERSIST_RETRY_WAIT_MS);
+      await appendBtwCustomEntry({
+        sessionFile: params.sessionFile,
+        timeoutMs: BTW_PERSIST_RETRY_LOCK_MS,
+        entry: params.entry,
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : String(error);
+      diag.warn(`btw transcript persistence skipped: sessionId=${params.sessionId} err=${message}`);
+    }
+  })();
+}
+
+async function persistBtwCustomEntry(params: {
+  sessionId: string;
+  sessionFile: string;
+  entry: BtwCustomEntryData;
+}) {
+  try {
+    await appendBtwCustomEntry({
+      sessionFile: params.sessionFile,
+      timeoutMs: BTW_PERSIST_TIMEOUT_MS,
+      entry: params.entry,
+    });
+  } catch (error) {
+    if (!isSessionLockError(error)) {
+      throw error;
+    }
+    deferBtwCustomEntryPersist({
+      sessionId: params.sessionId,
+      sessionFile: params.sessionFile,
+      entry: params.entry,
+    });
+  }
+}
+
+function persistBtwCustomEntryInBackground(params: {
+  sessionId: string;
+  sessionFile: string;
+  entry: BtwCustomEntryData;
+}) {
+  void persistBtwCustomEntry(params).catch((error) => {
+    const message = error instanceof Error ? error.message : String(error);
+    diag.warn(`btw transcript persistence skipped: sessionId=${params.sessionId} err=${message}`);
+  });
+}
+
+function collectTextContent(content: Array<{ type?: string; text?: string }>): string {
+  return content
+    .filter((part): part is { type: "text"; text: string } => part.type === "text")
+    .map((part) => part.text)
+    .join("");
+}
+
+function collectThinkingContent(content: Array<{ type?: string; thinking?: string }>): string {
+  return content
+    .filter((part): part is { type: "thinking"; thinking: string } => part.type === "thinking")
+    .map((part) => part.thinking)
+    .join("");
+}
+
+function buildBtwSystemPrompt(): string {
+  return [
+    "You are answering an ephemeral /btw side question about the current conversation.",
+    "Use the conversation only as background context.",
+    "Answer only the side question in the last user message.",
+    "Do not continue, resume, or complete any unfinished task from the conversation.",
+    "Do not emit tool calls, pseudo-tool calls, shell commands, file writes, patches, or code unless the side question explicitly asks for them.",
+    "Do not say you will continue the main task after answering.",
+    "If the question can be answered briefly, answer briefly.",
+  ].join("\n");
+}
+
+function buildBtwQuestionPrompt(question: string, inFlightPrompt?: string): string {
+  const lines = [
+    "Answer this side question only.",
+    "Ignore any unfinished task in the conversation while answering it.",
+  ];
+  const trimmedPrompt = inFlightPrompt?.trim();
+  if (trimmedPrompt) {
+    lines.push(
+      "",
+      "Current in-flight main task request for background context only:",
+      "<in_flight_main_task>",
+      trimmedPrompt,
+      "</in_flight_main_task>",
+      "Do not continue or complete that task while answering the side question.",
+    );
+  }
+  lines.push("", "<btw_side_question>", question.trim(), "</btw_side_question>");
+  return lines.join("\n");
+}
+
+function toSimpleContextMessages(messages: unknown[]): Message[] {
+  const contextMessages = messages.filter((message): message is Message => {
+    if (!message || typeof message !== "object") {
+      return false;
+    }
+    const role = (message as { role?: unknown }).role;
+    return role === "user" || role === "assistant";
+  });
+  return stripToolResultDetails(
+    contextMessages as Parameters<typeof stripToolResultDetails>[0],
+  ) as Message[];
+}
+
+function resolveSimpleThinkingLevel(level?: ThinkLevel): SimpleThinkingLevel | undefined {
+  if (!level || level === "off") {
+    return undefined;
+  }
+  return mapThinkingLevel(level) as SimpleThinkingLevel;
+}
+
+function resolveSessionTranscriptPath(params: {
+  sessionId: string;
+  sessionEntry?: SessionEntry;
+  sessionKey?: string;
+  storePath?: string;
+}): string | undefined {
+  try {
+    const agentId = params.sessionKey?.split(":")[1];
+    const pathOpts = resolveSessionFilePathOptions({
+      agentId,
+      storePath: params.storePath,
+    });
+    return resolveSessionFilePath(params.sessionId, params.sessionEntry, pathOpts);
+  } catch (error) {
+    diag.debug(
+      `resolveSessionTranscriptPath failed: sessionId=${params.sessionId} err=${String(error)}`,
+    );
+    return undefined;
+  }
+}
+
+async function resolveRuntimeModel(params: {
+  cfg: OpenClawConfig;
+  provider: string;
+  model: string;
+  agentDir: string;
+  sessionEntry?: SessionEntry;
+  sessionStore?: Record<string, SessionEntry>;
+  sessionKey?: string;
+  storePath?: string;
+  isNewSession: boolean;
+}): Promise<{
+  model: Model<Api>;
+  authProfileId?: string;
+  authProfileIdSource?: "auto" | "user";
+}> {
+  await ensureOpenClawModelsJson(params.cfg, params.agentDir);
+  const authStorage = discoverAuthStorage(params.agentDir);
+  const modelRegistry = discoverModels(authStorage, params.agentDir);
+  const model = resolveModelWithRegistry({
+    provider: params.provider,
+    modelId: params.model,
+    modelRegistry,
+    cfg: params.cfg,
+  });
+  if (!model) {
+    throw new Error(`Unknown model: ${params.provider}/${params.model}`);
+  }
+
+  const authProfileId = await resolveSessionAuthProfileOverride({
+    cfg: params.cfg,
+    provider: params.provider,
+    agentDir: params.agentDir,
+    sessionEntry: params.sessionEntry,
+    sessionStore: params.sessionStore,
+    sessionKey: params.sessionKey,
+    storePath: params.storePath,
+    isNewSession: params.isNewSession,
+  });
+  return {
+    model,
+    authProfileId,
+    authProfileIdSource: params.sessionEntry?.authProfileOverrideSource,
+  };
+}
+
+type RunBtwSideQuestionParams = {
+  cfg: OpenClawConfig;
+  agentDir: string;
+  provider: string;
+  model: string;
+  question: string;
+  sessionEntry: SessionEntry;
+  sessionStore?: Record<string, SessionEntry>;
+  sessionKey?: string;
+  storePath?: string;
+  resolvedThinkLevel?: ThinkLevel;
+  resolvedReasoningLevel: ReasoningLevel;
+  blockReplyChunking?: BlockReplyChunking;
+  resolvedBlockStreamingBreak?: "text_end" | "message_end";
+  opts?: GetReplyOptions;
+  isNewSession: boolean;
+};
+
+export async function runBtwSideQuestion(
+  params: RunBtwSideQuestionParams,
+): Promise<ReplyPayload | undefined> {
+  const sessionId = params.sessionEntry.sessionId?.trim();
+  if (!sessionId) {
+    throw new Error("No active session context.");
+  }
+
+  const sessionFile = resolveSessionTranscriptPath({
+    sessionId,
+    sessionEntry: params.sessionEntry,
+    sessionKey: params.sessionKey,
+    storePath: params.storePath,
+  });
+  if (!sessionFile) {
+    throw new Error("No active session transcript.");
+  }
+
+  const sessionManager = SessionManager.open(sessionFile) as SessionManagerLike;
+  const activeRunSnapshot = getActiveEmbeddedRunSnapshot(sessionId);
+  let messages: Message[] = [];
+  let inFlightPrompt: string | undefined;
+  if (Array.isArray(activeRunSnapshot?.messages) && activeRunSnapshot.messages.length > 0) {
+    messages = toSimpleContextMessages(activeRunSnapshot.messages);
+    inFlightPrompt = activeRunSnapshot.inFlightPrompt;
+  } else if (activeRunSnapshot) {
+    inFlightPrompt = activeRunSnapshot.inFlightPrompt;
+    if (activeRunSnapshot.transcriptLeafId && sessionManager.branch) {
+      try {
+        sessionManager.branch(activeRunSnapshot.transcriptLeafId);
+      } catch (error) {
+        diag.debug(
+          `btw snapshot leaf unavailable: sessionId=${sessionId} leaf=${activeRunSnapshot.transcriptLeafId} err=${String(error)}`,
+        );
+        sessionManager.resetLeaf?.();
+      }
+    } else {
+      sessionManager.resetLeaf?.();
+    }
+  } else {
+    const leafEntry = sessionManager.getLeafEntry?.();
+    if (leafEntry?.type === "message" && leafEntry.message?.role === "user") {
+      if (leafEntry.parentId && sessionManager.branch) {
+        sessionManager.branch(leafEntry.parentId);
+      } else {
+        sessionManager.resetLeaf?.();
+      }
+    }
+  }
+  if (messages.length === 0) {
+    const sessionContext = sessionManager.buildSessionContext();
+    messages = toSimpleContextMessages(
+      Array.isArray(sessionContext.messages) ? sessionContext.messages : [],
+    );
+  }
+  if (messages.length === 0 && !inFlightPrompt?.trim()) {
+    throw new Error("No active session context.");
+  }
+
+  const { model, authProfileId, authProfileIdSource } = await resolveRuntimeModel({
+    cfg: params.cfg,
+    provider: params.provider,
+    model: params.model,
+    agentDir: params.agentDir,
+    sessionEntry: params.sessionEntry,
+    sessionStore: params.sessionStore,
+    sessionKey: params.sessionKey,
+    storePath: params.storePath,
+    isNewSession: params.isNewSession,
+  });
+  const apiKeyInfo = await getApiKeyForModel({
+    model,
+    cfg: params.cfg,
+    profileId: authProfileId,
+    agentDir: params.agentDir,
+  });
+  const apiKey = requireApiKey(apiKeyInfo, model.provider);
+
+  const chunker =
+    params.opts?.onBlockReply && params.blockReplyChunking
+      ? new EmbeddedBlockChunker(params.blockReplyChunking)
+      : undefined;
+  let emittedBlocks = 0;
+  let blockEmitChain: Promise<void> = Promise.resolve();
+  let answerText = "";
+  let reasoningText = "";
+  let assistantStarted = false;
+  let sawTextEvent = false;
+
+  const emitBlockChunk = async (text: string) => {
+    const trimmed = text.trim();
+    if (!trimmed || !params.opts?.onBlockReply) {
+      return;
+    }
+    emittedBlocks += 1;
+    blockEmitChain = blockEmitChain.then(async () => {
+      await params.opts?.onBlockReply?.({
+        text,
+        btw: { question: params.question },
+      });
+    });
+    await blockEmitChain;
+  };
+
+  const stream = streamSimple(
+    model,
+    {
+      systemPrompt: buildBtwSystemPrompt(),
+      messages: [
+        ...messages,
+        {
+          role: "user",
+          content: [
+            {
+              type: "text",
+              text: buildBtwQuestionPrompt(params.question, inFlightPrompt),
+            },
+          ],
+          timestamp: Date.now(),
+        },
+      ],
+    },
+    {
+      apiKey,
+      reasoning: resolveSimpleThinkingLevel(params.resolvedThinkLevel),
+      signal: params.opts?.abortSignal,
+    },
+  );
+
+  let finalEvent:
+    | Extract<AssistantMessageEvent, { type: "done" }>
+    | Extract<AssistantMessageEvent, { type: "error" }>
+    | undefined;
+
+  for await (const event of stream) {
+    finalEvent = event.type === "done" || event.type === "error" ? event : finalEvent;
+
+    if (!assistantStarted && (event.type === "text_start" || event.type === "start")) {
+      assistantStarted = true;
+      await params.opts?.onAssistantMessageStart?.();
+    }
+
+    if (event.type === "text_delta") {
+      sawTextEvent = true;
+      answerText += event.delta;
+      chunker?.append(event.delta);
+      if (chunker && params.resolvedBlockStreamingBreak === "text_end") {
+        chunker.drain({ force: false, emit: (chunk) => void emitBlockChunk(chunk) });
+      }
+      continue;
+    }
+
+    if (event.type === "text_end" && chunker && params.resolvedBlockStreamingBreak === "text_end") {
+      chunker.drain({ force: true, emit: (chunk) => void emitBlockChunk(chunk) });
+      continue;
+    }
+
+    if (event.type === "thinking_delta") {
+      reasoningText += event.delta;
+      if (params.resolvedReasoningLevel !== "off") {
+        await params.opts?.onReasoningStream?.({ text: reasoningText, isReasoning: true });
+      }
+      continue;
+    }
+
+    if (event.type === "thinking_end" && params.resolvedReasoningLevel !== "off") {
+      await params.opts?.onReasoningEnd?.();
+    }
+  }
+
+  if (chunker && params.resolvedBlockStreamingBreak !== "text_end" && chunker.hasBuffered()) {
+    chunker.drain({ force: true, emit: (chunk) => void emitBlockChunk(chunk) });
+  }
+  await blockEmitChain;
+
+  if (finalEvent?.type === "error") {
+    const message = collectTextContent(finalEvent.error.content);
+    throw new Error(message || finalEvent.error.errorMessage || "BTW failed.");
+  }
+
+  const finalMessage = finalEvent?.type === "done" ? finalEvent.message : undefined;
+  if (finalMessage) {
+    if (!sawTextEvent) {
+      answerText = collectTextContent(finalMessage.content);
+    }
+    if (!reasoningText) {
+      reasoningText = collectThinkingContent(finalMessage.content);
+    }
+  }
+
+  const answer = answerText.trim();
+  if (!answer) {
+    throw new Error("No BTW response generated.");
+  }
+
+  const customEntry = {
+    timestamp: Date.now(),
+    question: params.question,
+    answer,
+    provider: model.provider,
+    model: model.id,
+    thinkingLevel: params.resolvedThinkLevel ?? "off",
+    reasoningLevel: params.resolvedReasoningLevel,
+    sessionKey: params.sessionKey,
+    authProfileId,
+    authProfileIdSource,
+    usage: finalMessage?.usage,
+  } satisfies BtwCustomEntryData;
+
+  persistBtwCustomEntryInBackground({
+    sessionId,
+    sessionFile,
+    entry: customEntry,
+  });
+
+  if (emittedBlocks > 0) {
+    return undefined;
+  }
+
+  return { text: answer };
+}
+
+export { BTW_CUSTOM_TYPE };

src/agents/pi-embedded-runner/run/attempt.ts

@@ -111,6 +111,7 @@ import {
   clearActiveEmbeddedRun,
   type EmbeddedPiQueueHandle,
   setActiveEmbeddedRun,
+  updateActiveEmbeddedRunSnapshot,
 } from "../runs.js";
 import { buildEmbeddedSandboxInfo } from "../sandbox-info.js";
 import { prewarmSessionFile, trackSessionManagerAccess } from "../session-manager-cache.js";
@@ -830,6 +831,7 @@ function extractBalancedJsonPrefix(raw: string): string | null {
 const MAX_TOOLCALL_REPAIR_BUFFER_CHARS = 64_000;
 const MAX_TOOLCALL_REPAIR_TRAILING_CHARS = 3;
 const TOOLCALL_REPAIR_ALLOWED_TRAILING_RE = /^[^\s{}[\]":,\\]{1,3}$/;
+const MAX_BTW_SNAPSHOT_MESSAGES = 100;
 
 function shouldAttemptMalformedToolCallRepair(partialJson: string, delta: string): boolean {
   if (/[}\]]/.test(delta)) {
@@ -2376,6 +2378,8 @@ export async function runEmbeddedAttempt(
               `runId=${params.runId} sessionId=${params.sessionId}`,
           );
         }
+        const transcriptLeafId =
+          (sessionManager.getLeafEntry() as { id?: string } | null | undefined)?.id ?? null;
 
         try {
           // Idempotent cleanup for legacy sessions with persisted image payloads.
@@ -2454,6 +2458,13 @@ export async function runEmbeddedAttempt(
               });
           }
 
+          const btwSnapshotMessages = activeSession.messages.slice(-MAX_BTW_SNAPSHOT_MESSAGES);
+          updateActiveEmbeddedRunSnapshot(params.sessionId, {
+            transcriptLeafId,
+            messages: btwSnapshotMessages,
+            inFlightPrompt: effectivePrompt,
+          });
+
           // Only pass images option if there are actually images to pass
           // This avoids potential issues with models that don't expect the images parameter
           if (imageResult.images.length > 0) {

src/agents/pi-embedded-runner/runs.test.ts

@@ -4,7 +4,9 @@ import {
   __testing,
   abortEmbeddedPiRun,
   clearActiveEmbeddedRun,
+  getActiveEmbeddedRunSnapshot,
   setActiveEmbeddedRun,
+  updateActiveEmbeddedRunSnapshot,
   waitForActiveEmbeddedRuns,
 } from "./runs.js";
 
@@ -137,4 +139,28 @@ describe("pi-embedded runner run registry", () => {
       runsB.__testing.resetActiveEmbeddedRuns();
     }
   });
+
+  it("tracks and clears per-session transcript snapshots for active runs", () => {
+    const handle = {
+      queueMessage: async () => {},
+      isStreaming: () => true,
+      isCompacting: () => false,
+      abort: vi.fn(),
+    };
+
+    setActiveEmbeddedRun("session-snapshot", handle);
+    updateActiveEmbeddedRunSnapshot("session-snapshot", {
+      transcriptLeafId: "assistant-1",
+      messages: [{ role: "user", content: [{ type: "text", text: "hello" }], timestamp: 1 }],
+      inFlightPrompt: "keep going",
+    });
+    expect(getActiveEmbeddedRunSnapshot("session-snapshot")).toEqual({
+      transcriptLeafId: "assistant-1",
+      messages: [{ role: "user", content: [{ type: "text", text: "hello" }], timestamp: 1 }],
+      inFlightPrompt: "keep going",
+    });
+
+    clearActiveEmbeddedRun("session-snapshot", handle);
+    expect(getActiveEmbeddedRunSnapshot("session-snapshot")).toBeUndefined();
+  });
 });

src/agents/pi-embedded-runner/runs.ts

@@ -12,6 +12,12 @@ type EmbeddedPiQueueHandle = {
   abort: () => void;
 };
 
+export type ActiveEmbeddedRunSnapshot = {
+  transcriptLeafId: string | null;
+  messages?: unknown[];
+  inFlightPrompt?: string;
+};
+
 type EmbeddedRunWaiter = {
   resolve: (ended: boolean) => void;
   timer: NodeJS.Timeout;
@@ -25,9 +31,11 @@ const EMBEDDED_RUN_STATE_KEY = Symbol.for("openclaw.embeddedRunState");
 
 const embeddedRunState = resolveGlobalSingleton(EMBEDDED_RUN_STATE_KEY, () => ({
   activeRuns: new Map<string, EmbeddedPiQueueHandle>(),
+  snapshots: new Map<string, ActiveEmbeddedRunSnapshot>(),
   waiters: new Map<string, Set<EmbeddedRunWaiter>>(),
 }));
 const ACTIVE_EMBEDDED_RUNS = embeddedRunState.activeRuns;
+const ACTIVE_EMBEDDED_RUN_SNAPSHOTS = embeddedRunState.snapshots;
 const EMBEDDED_RUN_WAITERS = embeddedRunState.waiters;
 
 export function queueEmbeddedPiMessage(sessionId: string, text: string): boolean {
@@ -135,6 +143,12 @@ export function getActiveEmbeddedRunCount(): number {
   return ACTIVE_EMBEDDED_RUNS.size;
 }
 
+export function getActiveEmbeddedRunSnapshot(
+  sessionId: string,
+): ActiveEmbeddedRunSnapshot | undefined {
+  return ACTIVE_EMBEDDED_RUN_SNAPSHOTS.get(sessionId);
+}
+
 /**
  * Wait for active embedded runs to drain.
  *
@@ -230,6 +244,16 @@ export function setActiveEmbeddedRun(
   }
 }
 
+export function updateActiveEmbeddedRunSnapshot(
+  sessionId: string,
+  snapshot: ActiveEmbeddedRunSnapshot,
+) {
+  if (!ACTIVE_EMBEDDED_RUNS.has(sessionId)) {
+    return;
+  }
+  ACTIVE_EMBEDDED_RUN_SNAPSHOTS.set(sessionId, snapshot);
+}
+
 export function clearActiveEmbeddedRun(
   sessionId: string,
   handle: EmbeddedPiQueueHandle,
@@ -237,6 +261,7 @@ export function clearActiveEmbeddedRun(
 ) {
   if (ACTIVE_EMBEDDED_RUNS.get(sessionId) === handle) {
     ACTIVE_EMBEDDED_RUNS.delete(sessionId);
+    ACTIVE_EMBEDDED_RUN_SNAPSHOTS.delete(sessionId);
     logSessionStateChange({ sessionId, sessionKey, state: "idle", reason: "run_completed" });
     if (!sessionId.startsWith("probe-")) {
       diag.debug(`run cleared: sessionId=${sessionId} totalActive=${ACTIVE_EMBEDDED_RUNS.size}`);
@@ -257,6 +282,7 @@ export const __testing = {
     }
     EMBEDDED_RUN_WAITERS.clear();
     ACTIVE_EMBEDDED_RUNS.clear();
+    ACTIVE_EMBEDDED_RUN_SNAPSHOTS.clear();
   },
 };
 

src/auto-reply/commands-registry.data.ts

@@ -196,6 +196,14 @@ function buildChatCommands(): ChatCommandDefinition[] {
       acceptsArgs: true,
       category: "status",
     }),
+    defineChatCommand({
+      key: "btw",
+      nativeName: "btw",
+      description: "Ask a side question without changing future session context.",
+      textAlias: "/btw",
+      acceptsArgs: true,
+      category: "tools",
+    }),
     defineChatCommand({
       key: "export-session",
       nativeName: "export-session",

src/auto-reply/reply/btw-command.ts

@@ -0,0 +1,26 @@
+import { normalizeCommandBody, type CommandNormalizeOptions } from "../commands-registry.js";
+
+const BTW_COMMAND_RE = /^\/btw(?::|\s|$)/i;
+
+export function isBtwRequestText(text?: string, options?: CommandNormalizeOptions): boolean {
+  if (!text) {
+    return false;
+  }
+  const normalized = normalizeCommandBody(text, options).trim();
+  return BTW_COMMAND_RE.test(normalized);
+}
+
+export function extractBtwQuestion(
+  text?: string,
+  options?: CommandNormalizeOptions,
+): string | null {
+  if (!text) {
+    return null;
+  }
+  const normalized = normalizeCommandBody(text, options).trim();
+  const match = normalized.match(/^\/btw(?:\s+(.*))?$/i);
+  if (!match) {
+    return null;
+  }
+  return match[1]?.trim() ?? "";
+}

src/auto-reply/reply/commands-btw.test.ts

@@ -0,0 +1,131 @@
+import { describe, expect, it, vi, beforeEach } from "vitest";
+import type { OpenClawConfig } from "../../config/config.js";
+import { buildCommandTestParams } from "./commands.test-harness.js";
+import { createMockTypingController } from "./test-helpers.js";
+
+const runBtwSideQuestionMock = vi.fn();
+
+vi.mock("../../agents/btw.js", () => ({
+  runBtwSideQuestion: (...args: unknown[]) => runBtwSideQuestionMock(...args),
+}));
+
+const { handleBtwCommand } = await import("./commands-btw.js");
+
+function buildParams(commandBody: string) {
+  const cfg = {
+    commands: { text: true },
+    channels: { whatsapp: { allowFrom: ["*"] } },
+  } as OpenClawConfig;
+  return buildCommandTestParams(commandBody, cfg, undefined, { workspaceDir: "/tmp/workspace" });
+}
+
+describe("handleBtwCommand", () => {
+  beforeEach(() => {
+    runBtwSideQuestionMock.mockReset();
+  });
+
+  it("returns usage when the side question is missing", async () => {
+    const result = await handleBtwCommand(buildParams("/btw"), true);
+
+    expect(result).toEqual({
+      shouldContinue: false,
+      reply: { text: "Usage: /btw <side question>" },
+    });
+  });
+
+  it("ignores /btw when text commands are disabled", async () => {
+    const result = await handleBtwCommand(buildParams("/btw what changed?"), false);
+
+    expect(result).toBeNull();
+    expect(runBtwSideQuestionMock).not.toHaveBeenCalled();
+  });
+
+  it("ignores /btw from unauthorized senders", async () => {
+    const params = buildParams("/btw what changed?");
+    params.command.isAuthorizedSender = false;
+
+    const result = await handleBtwCommand(params, true);
+
+    expect(result).toEqual({ shouldContinue: false });
+    expect(runBtwSideQuestionMock).not.toHaveBeenCalled();
+  });
+
+  it("requires an active session context", async () => {
+    const params = buildParams("/btw what changed?");
+    params.sessionEntry = undefined;
+
+    const result = await handleBtwCommand(params, true);
+
+    expect(result).toEqual({
+      shouldContinue: false,
+      reply: { text: "⚠️ /btw requires an active session with existing context." },
+    });
+  });
+
+  it("still delegates while the session is actively running", async () => {
+    const params = buildParams("/btw what changed?");
+    params.agentDir = "/tmp/agent";
+    params.sessionEntry = {
+      sessionId: "session-1",
+      updatedAt: Date.now(),
+    };
+    runBtwSideQuestionMock.mockResolvedValue({ text: "snapshot answer" });
+
+    const result = await handleBtwCommand(params, true);
+
+    expect(runBtwSideQuestionMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        question: "what changed?",
+        sessionEntry: params.sessionEntry,
+        resolvedThinkLevel: "off",
+        resolvedReasoningLevel: "off",
+      }),
+    );
+    expect(result).toEqual({
+      shouldContinue: false,
+      reply: { text: "snapshot answer", btw: { question: "what changed?" } },
+    });
+  });
+
+  it("starts the typing keepalive while the side question runs", async () => {
+    const params = buildParams("/btw what changed?");
+    const typing = createMockTypingController();
+    params.typing = typing;
+    params.agentDir = "/tmp/agent";
+    params.sessionEntry = {
+      sessionId: "session-1",
+      updatedAt: Date.now(),
+    };
+    runBtwSideQuestionMock.mockResolvedValue({ text: "snapshot answer" });
+
+    await handleBtwCommand(params, true);
+
+    expect(typing.startTypingLoop).toHaveBeenCalledTimes(1);
+  });
+
+  it("delegates to the side-question runner", async () => {
+    const params = buildParams("/btw what changed?");
+    params.agentDir = "/tmp/agent";
+    params.sessionEntry = {
+      sessionId: "session-1",
+      updatedAt: Date.now(),
+    };
+    runBtwSideQuestionMock.mockResolvedValue({ text: "nothing important" });
+
+    const result = await handleBtwCommand(params, true);
+
+    expect(runBtwSideQuestionMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        question: "what changed?",
+        agentDir: "/tmp/agent",
+        sessionEntry: params.sessionEntry,
+        resolvedThinkLevel: "off",
+        resolvedReasoningLevel: "off",
+      }),
+    );
+    expect(result).toEqual({
+      shouldContinue: false,
+      reply: { text: "nothing important", btw: { question: "what changed?" } },
+    });
+  });
+});

src/auto-reply/reply/commands-btw.ts

@@ -0,0 +1,80 @@
+import { runBtwSideQuestion } from "../../agents/btw.js";
+import { extractBtwQuestion } from "./btw-command.js";
+import { rejectUnauthorizedCommand } from "./command-gates.js";
+import type { CommandHandler } from "./commands-types.js";
+
+const BTW_USAGE = "Usage: /btw <side question>";
+
+export const handleBtwCommand: CommandHandler = async (params, allowTextCommands) => {
+  if (!allowTextCommands) {
+    return null;
+  }
+  const question = extractBtwQuestion(params.command.commandBodyNormalized);
+  if (question === null) {
+    return null;
+  }
+  const unauthorized = rejectUnauthorizedCommand(params, "/btw");
+  if (unauthorized) {
+    return unauthorized;
+  }
+
+  if (!question) {
+    return {
+      shouldContinue: false,
+      reply: { text: BTW_USAGE },
+    };
+  }
+
+  if (!params.sessionEntry?.sessionId) {
+    return {
+      shouldContinue: false,
+      reply: { text: "⚠️ /btw requires an active session with existing context." },
+    };
+  }
+
+  if (!params.agentDir) {
+    return {
+      shouldContinue: false,
+      reply: {
+        text: "⚠️ /btw is unavailable because the active agent directory could not be resolved.",
+      },
+    };
+  }
+
+  try {
+    await params.typing?.startTypingLoop();
+    const reply = await runBtwSideQuestion({
+      cfg: params.cfg,
+      agentDir: params.agentDir,
+      provider: params.provider,
+      model: params.model,
+      question,
+      sessionEntry: params.sessionEntry,
+      sessionStore: params.sessionStore,
+      sessionKey: params.sessionKey,
+      storePath: params.storePath,
+      // BTW is intentionally a quick side question, so do not inherit slower
+      // session-level think/reasoning settings from the main run.
+      resolvedThinkLevel: "off",
+      resolvedReasoningLevel: "off",
+      blockReplyChunking: params.blockReplyChunking,
+      resolvedBlockStreamingBreak: params.resolvedBlockStreamingBreak,
+      opts: params.opts,
+      isNewSession: false,
+    });
+    return {
+      shouldContinue: false,
+      reply: reply ? { ...reply, btw: { question } } : reply,
+    };
+  } catch (error) {
+    const message = error instanceof Error ? error.message.trim() : "";
+    return {
+      shouldContinue: false,
+      reply: {
+        text: `⚠️ /btw failed${message ? `: ${message}` : "."}`,
+        btw: { question },
+        isError: true,
+      },
+    };
+  }
+};

src/auto-reply/reply/commands-core.ts

@@ -11,6 +11,7 @@ import { resolveBoundAcpThreadSessionKey } from "./commands-acp/targets.js";
 import { handleAllowlistCommand } from "./commands-allowlist.js";
 import { handleApproveCommand } from "./commands-approve.js";
 import { handleBashCommand } from "./commands-bash.js";
+import { handleBtwCommand } from "./commands-btw.js";
 import { handleCompactCommand } from "./commands-compact.js";
 import { handleConfigCommand, handleDebugCommand } from "./commands-config.js";
 import {
@@ -174,6 +175,7 @@ export async function handleCommands(params: HandleCommandsParams): Promise<Comm
     HANDLERS = [
       // Plugin commands are processed first, before built-in commands
       handlePluginCommand,
+      handleBtwCommand,
       handleBashCommand,
       handleActivationCommand,
       handleSendPolicyCommand,

src/auto-reply/reply/commands-types.ts

@@ -1,11 +1,13 @@
+import type { BlockReplyChunking } from "../../agents/pi-embedded-block-chunker.js";
 import type { SkillCommandSpec } from "../../agents/skills.js";
 import type { ChannelId } from "../../channels/plugins/types.js";
 import type { OpenClawConfig } from "../../config/config.js";
 import type { SessionEntry, SessionScope } from "../../config/sessions.js";
 import type { MsgContext } from "../templating.js";
 import type { ElevatedLevel, ReasoningLevel, ThinkLevel, VerboseLevel } from "../thinking.js";
-import type { ReplyPayload } from "../types.js";
+import type { GetReplyOptions, ReplyPayload } from "../types.js";
 import type { InlineDirectives } from "./directive-handling.js";
+import type { TypingController } from "./typing.js";
 
 export type CommandContext = {
   surface: string;
@@ -44,17 +46,21 @@ export type HandleCommandsParams = {
   storePath?: string;
   sessionScope?: SessionScope;
   workspaceDir: string;
+  opts?: GetReplyOptions;
   defaultGroupActivation: () => "always" | "mention";
   resolvedThinkLevel?: ThinkLevel;
   resolvedVerboseLevel: VerboseLevel;
   resolvedReasoningLevel: ReasoningLevel;
   resolvedElevatedLevel?: ElevatedLevel;
+  blockReplyChunking?: BlockReplyChunking;
+  resolvedBlockStreamingBreak?: "text_end" | "message_end";
   resolveDefaultThinkingLevel: () => Promise<ThinkLevel | undefined>;
   provider: string;
   model: string;
   contextTokens: number;
   isGroup: boolean;
   skillCommands?: SkillCommandSpec[];
+  typing?: TypingController;
 };
 
 export type CommandHandlerResult = {

src/auto-reply/reply/get-reply-inline-actions.ts

@@ -1,5 +1,6 @@
 import { collectTextContentBlocks } from "../../agents/content-blocks.js";
 import { createOpenClawTools } from "../../agents/openclaw-tools.js";
+import type { BlockReplyChunking } from "../../agents/pi-embedded-block-chunker.js";
 import type { SkillCommandSpec } from "../../agents/skills.js";
 import { applyOwnerOnlyToolPolicy } from "../../agents/tool-policy.js";
 import { getChannelDock } from "../../channels/dock.js";
@@ -37,6 +38,7 @@ function getBuiltinSlashCommands(): Set<string> {
     return builtinSlashCommands;
   }
   builtinSlashCommands = listReservedChatSlashCommandNames([
+    "btw",
     "think",
     "verbose",
     "reasoning",
@@ -113,6 +115,8 @@ export async function handleInlineActions(params: {
   resolvedVerboseLevel: VerboseLevel | undefined;
   resolvedReasoningLevel: ReasoningLevel;
   resolvedElevatedLevel: ElevatedLevel;
+  blockReplyChunking?: BlockReplyChunking;
+  resolvedBlockStreamingBreak?: "text_end" | "message_end";
   resolveDefaultThinkingLevel: Awaited<
     ReturnType<typeof createModelSelectionState>
   >["resolveDefaultThinkingLevel"];
@@ -152,6 +156,8 @@ export async function handleInlineActions(params: {
     resolvedVerboseLevel,
     resolvedReasoningLevel,
     resolvedElevatedLevel,
+    blockReplyChunking,
+    resolvedBlockStreamingBreak,
     resolveDefaultThinkingLevel,
     provider,
     model,
@@ -357,17 +363,21 @@ export async function handleInlineActions(params: {
       storePath,
       sessionScope,
       workspaceDir,
+      opts,
       defaultGroupActivation: defaultActivation,
       resolvedThinkLevel,
       resolvedVerboseLevel: resolvedVerboseLevel ?? "off",
       resolvedReasoningLevel,
       resolvedElevatedLevel,
+      blockReplyChunking,
+      resolvedBlockStreamingBreak,
       resolveDefaultThinkingLevel,
       provider,
       model,
       contextTokens,
       isGroup,
       skillCommands,
+      typing,
     });
 
   if (inlineCommand) {

src/auto-reply/reply/get-reply.ts

@@ -332,6 +332,8 @@ export async function getReplyFromConfig(
     resolvedVerboseLevel,
     resolvedReasoningLevel,
     resolvedElevatedLevel,
+    blockReplyChunking,
+    resolvedBlockStreamingBreak,
     resolveDefaultThinkingLevel: modelState.resolveDefaultThinkingLevel,
     provider,
     model,

src/auto-reply/reply/reply-payloads.ts

@@ -10,6 +10,19 @@ import type { ReplyPayload } from "../types.js";
 import { extractReplyToTag } from "./reply-tags.js";
 import { createReplyToModeFilterForChannel } from "./reply-threading.js";
 
+export function formatBtwTextForExternalDelivery(payload: ReplyPayload): string | undefined {
+  const text = payload.text?.trim();
+  if (!text) {
+    return payload.text;
+  }
+  const question = payload.btw?.question?.trim();
+  if (!question) {
+    return payload.text;
+  }
+  const formatted = `BTW\nQuestion: ${question}\n\n${text}`;
+  return text === formatted || text.startsWith("BTW\nQuestion:") ? text : formatted;
+}
+
 function resolveReplyThreadingForPayload(params: {
   payload: ReplyPayload;
   implicitReplyToId?: string;

src/auto-reply/reply/route-reply.test.ts

@@ -44,25 +44,33 @@ vi.mock("../../../extensions/slack/src/send.js", () => ({
 vi.mock("../../../extensions/telegram/src/send.js", () => ({
   sendMessageTelegram: mocks.sendMessageTelegram,
 }));
+vi.mock("../../../extensions/telegram/src/send.js", () => ({
+  sendMessageTelegram: mocks.sendMessageTelegram,
+}));
 vi.mock("../../../extensions/whatsapp/src/send.js", () => ({
   sendMessageWhatsApp: mocks.sendMessageWhatsApp,
   sendPollWhatsApp: mocks.sendMessageWhatsApp,
 }));
+vi.mock("../../../extensions/discord/src/send.js", () => ({
+  sendMessageDiscord: mocks.sendMessageDiscord,
+  sendPollDiscord: mocks.sendMessageDiscord,
+  sendWebhookMessageDiscord: vi.fn(),
+}));
 vi.mock("../../../extensions/mattermost/src/mattermost/send.js", () => ({
   sendMessageMattermost: mocks.sendMessageMattermost,
 }));
-vi.mock("../../infra/outbound/deliver.js", async () => {
-  const actual = await vi.importActual<typeof import("../../infra/outbound/deliver.js")>(
-    "../../infra/outbound/deliver.js",
+vi.mock("../../infra/outbound/deliver-runtime.js", async () => {
+  const actual = await vi.importActual<typeof import("../../infra/outbound/deliver-runtime.js")>(
+    "../../infra/outbound/deliver-runtime.js",
   );
   return {
     ...actual,
     deliverOutboundPayloads: mocks.deliverOutboundPayloads,
   };
 });
-const actualDeliver = await vi.importActual<typeof import("../../infra/outbound/deliver.js")>(
-  "../../infra/outbound/deliver.js",
-);
+const actualDeliver = await vi.importActual<
+  typeof import("../../infra/outbound/deliver-runtime.js")
+>("../../infra/outbound/deliver-runtime.js");
 
 const { routeReply } = await import("./route-reply.js");
 
@@ -294,6 +302,36 @@ describe("routeReply", () => {
     );
   });
 
+  it("formats BTW replies prominently on routed sends", async () => {
+    mocks.sendMessageSlack.mockClear();
+    await routeReply({
+      payload: { text: "323", btw: { question: "what is 17 * 19?" } },
+      channel: "slack",
+      to: "channel:C123",
+      cfg: {} as never,
+    });
+    expect(mocks.sendMessageSlack).toHaveBeenCalledWith(
+      "channel:C123",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
+      expect.any(Object),
+    );
+  });
+
+  it("formats BTW replies prominently on routed discord sends", async () => {
+    mocks.sendMessageDiscord.mockClear();
+    await routeReply({
+      payload: { text: "323", btw: { question: "what is 17 * 19?" } },
+      channel: "discord",
+      to: "channel:123456",
+      cfg: {} as never,
+    });
+    expect(mocks.sendMessageDiscord).toHaveBeenCalledWith(
+      "channel:123456",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
+      expect.any(Object),
+    );
+  });
+
   it("passes replyToId to Telegram sends", async () => {
     mocks.sendMessageTelegram.mockClear();
     await routeReply({

src/auto-reply/reply/route-reply.ts

@@ -18,7 +18,10 @@ import { INTERNAL_MESSAGE_CHANNEL, normalizeMessageChannel } from "../../utils/m
 import type { OriginatingChannelType } from "../templating.js";
 import type { ReplyPayload } from "../types.js";
 import { normalizeReplyPayload } from "./normalize-reply.js";
-import { shouldSuppressReasoningPayload } from "./reply-payloads.js";
+import {
+  formatBtwTextForExternalDelivery,
+  shouldSuppressReasoningPayload,
+} from "./reply-payloads.js";
 
 let deliverRuntimePromise: Promise<
   typeof import("../../infra/outbound/deliver-runtime.js")
@@ -102,24 +105,28 @@ export async function routeReply(params: RouteReplyParams): Promise<RouteReplyRe
   if (!normalized) {
     return { ok: true };
   }
+  const externalPayload: ReplyPayload = {
+    ...normalized,
+    text: formatBtwTextForExternalDelivery(normalized),
+  };
 
-  let text = normalized.text ?? "";
-  let mediaUrls = (normalized.mediaUrls?.filter(Boolean) ?? []).length
-    ? (normalized.mediaUrls?.filter(Boolean) as string[])
-    : normalized.mediaUrl
-      ? [normalized.mediaUrl]
+  let text = externalPayload.text ?? "";
+  let mediaUrls = (externalPayload.mediaUrls?.filter(Boolean) ?? []).length
+    ? (externalPayload.mediaUrls?.filter(Boolean) as string[])
+    : externalPayload.mediaUrl
+      ? [externalPayload.mediaUrl]
       : [];
-  const replyToId = normalized.replyToId;
+  const replyToId = externalPayload.replyToId;
   let hasSlackBlocks = false;
   if (
     channel === "slack" &&
-    normalized.channelData?.slack &&
-    typeof normalized.channelData.slack === "object" &&
-    !Array.isArray(normalized.channelData.slack)
+    externalPayload.channelData?.slack &&
+    typeof externalPayload.channelData.slack === "object" &&
+    !Array.isArray(externalPayload.channelData.slack)
   ) {
     try {
       hasSlackBlocks = Boolean(
-        parseSlackBlocksInput((normalized.channelData.slack as { blocks?: unknown }).blocks)
+        parseSlackBlocksInput((externalPayload.channelData.slack as { blocks?: unknown }).blocks)
           ?.length,
       );
     } catch {
@@ -168,7 +175,7 @@ export async function routeReply(params: RouteReplyParams): Promise<RouteReplyRe
       channel: channelId,
       to,
       accountId: accountId ?? undefined,
-      payloads: [normalized],
+      payloads: [externalPayload],
       replyToId: resolvedReplyToId ?? null,
       threadId: resolvedThreadId,
       session: outboundSession,

src/auto-reply/types.ts

@@ -76,6 +76,9 @@ export type ReplyPayload = {
   text?: string;
   mediaUrl?: string;
   mediaUrls?: string[];
+  btw?: {
+    question: string;
+  };
   replyToId?: string;
   replyToTag?: boolean;
   /** True when [[reply_to_current]] was present but not yet mapped to a message id. */

src/gateway/server-methods/chat.ts

@@ -8,6 +8,7 @@ import { dispatchInboundMessage } from "../../auto-reply/dispatch.js";
 import { createReplyDispatcher } from "../../auto-reply/reply/reply-dispatcher.js";
 import type { MsgContext } from "../../auto-reply/templating.js";
 import { isSilentReplyText, SILENT_REPLY_TOKEN } from "../../auto-reply/tokens.js";
+import type { ReplyPayload } from "../../auto-reply/types.js";
 import { createReplyPrefixOptions } from "../../channels/reply-prefix.js";
 import { resolveSessionFilePath } from "../../config/sessions.js";
 import { jsonUtf8Bytes } from "../../infra/json-utf8-bytes.js";
@@ -130,6 +131,16 @@ type ChatSendOriginatingRoute = {
   explicitDeliverRoute: boolean;
 };
 
+type SideResultPayload = {
+  kind: "btw";
+  runId: string;
+  sessionKey: string;
+  question: string;
+  text: string;
+  isError?: boolean;
+  ts: number;
+};
+
 function resolveChatSendOriginatingRoute(params: {
   client?: { mode?: string | null; id?: string | null } | null;
   deliver?: boolean;
@@ -900,6 +911,33 @@ function broadcastChatFinal(params: {
   params.context.agentRunSeq.delete(params.runId);
 }
 
+function isBtwReplyPayload(payload: ReplyPayload | undefined): payload is ReplyPayload & {
+  btw: { question: string };
+  text: string;
+} {
+  return (
+    typeof payload?.btw?.question === "string" &&
+    payload.btw.question.trim().length > 0 &&
+    typeof payload.text === "string" &&
+    payload.text.trim().length > 0
+  );
+}
+
+function broadcastSideResult(params: {
+  context: Pick<GatewayRequestContext, "broadcast" | "nodeSendToSession" | "agentRunSeq">;
+  payload: SideResultPayload;
+}) {
+  const seq = nextChatSeq({ agentRunSeq: params.context.agentRunSeq }, params.payload.runId);
+  params.context.broadcast("chat.side_result", {
+    ...params.payload,
+    seq,
+  });
+  params.context.nodeSendToSession(params.payload.sessionKey, "chat.side_result", {
+    ...params.payload,
+    seq,
+  });
+}
+
 function broadcastChatError(params: {
   context: Pick<GatewayRequestContext, "broadcast" | "nodeSendToSession" | "agentRunSeq">;
   runId: string;
@@ -1284,21 +1322,17 @@ export const chatHandlers: GatewayRequestHandlers = {
         agentId,
         channel: INTERNAL_MESSAGE_CHANNEL,
       });
-      const finalReplyParts: string[] = [];
+      const deliveredReplies: Array<{ payload: ReplyPayload; kind: "block" | "final" }> = [];
       const dispatcher = createReplyDispatcher({
         ...prefixOptions,
         onError: (err) => {
           context.logGateway.warn(`webchat dispatch failed: ${formatForLog(err)}`);
         },
         deliver: async (payload, info) => {
-          if (info.kind !== "final") {
+          if (info.kind !== "block" && info.kind !== "final") {
             return;
           }
-          const text = payload.text?.trim() ?? "";
-          if (!text) {
-            return;
-          }
-          finalReplyParts.push(text);
+          deliveredReplies.push({ payload, kind: info.kind });
         },
       });
 
@@ -1335,48 +1369,78 @@ export const chatHandlers: GatewayRequestHandlers = {
       })
         .then(() => {
           if (!agentRunStarted) {
-            const combinedReply = finalReplyParts
-              .map((part) => part.trim())
+            const btwReplies = deliveredReplies
+              .map((entry) => entry.payload)
+              .filter(isBtwReplyPayload);
+            const btwText = btwReplies
+              .map((payload) => payload.text.trim())
               .filter(Boolean)
               .join("\n\n")
               .trim();
-            let message: Record<string, unknown> | undefined;
-            if (combinedReply) {
-              const { storePath: latestStorePath, entry: latestEntry } =
-                loadSessionEntry(sessionKey);
-              const sessionId = latestEntry?.sessionId ?? entry?.sessionId ?? clientRunId;
-              const appended = appendAssistantTranscriptMessage({
-                message: combinedReply,
-                sessionId,
-                storePath: latestStorePath,
-                sessionFile: latestEntry?.sessionFile,
-                agentId,
-                createIfMissing: true,
+            if (btwReplies.length > 0 && btwText) {
+              broadcastSideResult({
+                context,
+                payload: {
+                  kind: "btw",
+                  runId: clientRunId,
+                  sessionKey: rawSessionKey,
+                  question: btwReplies[0].btw.question.trim(),
+                  text: btwText,
+                  isError: btwReplies.some((payload) => payload.isError),
+                  ts: Date.now(),
+                },
               });
-              if (appended.ok) {
-                message = appended.message;
-              } else {
-                context.logGateway.warn(
-                  `webchat transcript append failed: ${appended.error ?? "unknown error"}`,
-                );
-                const now = Date.now();
-                message = {
-                  role: "assistant",
-                  content: [{ type: "text", text: combinedReply }],
-                  timestamp: now,
-                  // Keep this compatible with Pi stopReason enums even though this message isn't
-                  // persisted to the transcript due to the append failure.
-                  stopReason: "stop",
-                  usage: { input: 0, output: 0, totalTokens: 0 },
-                };
+              broadcastChatFinal({
+                context,
+                runId: clientRunId,
+                sessionKey: rawSessionKey,
+              });
+            } else {
+              const combinedReply = deliveredReplies
+                .filter((entry) => entry.kind === "final")
+                .map((entry) => entry.payload)
+                .map((part) => part.text?.trim() ?? "")
+                .filter(Boolean)
+                .join("\n\n")
+                .trim();
+              let message: Record<string, unknown> | undefined;
+              if (combinedReply) {
+                const { storePath: latestStorePath, entry: latestEntry } =
+                  loadSessionEntry(sessionKey);
+                const sessionId = latestEntry?.sessionId ?? entry?.sessionId ?? clientRunId;
+                const appended = appendAssistantTranscriptMessage({
+                  message: combinedReply,
+                  sessionId,
+                  storePath: latestStorePath,
+                  sessionFile: latestEntry?.sessionFile,
+                  agentId,
+                  createIfMissing: true,
+                });
+                if (appended.ok) {
+                  message = appended.message;
+                } else {
+                  context.logGateway.warn(
+                    `webchat transcript append failed: ${appended.error ?? "unknown error"}`,
+                  );
+                  const now = Date.now();
+                  message = {
+                    role: "assistant",
+                    content: [{ type: "text", text: combinedReply }],
+                    timestamp: now,
+                    // Keep this compatible with Pi stopReason enums even though this message isn't
+                    // persisted to the transcript due to the append failure.
+                    stopReason: "stop",
+                    usage: { input: 0, output: 0, totalTokens: 0 },
+                  };
+                }
               }
+              broadcastChatFinal({
+                context,
+                runId: clientRunId,
+                sessionKey: rawSessionKey,
+                message,
+              });
             }
-            broadcastChatFinal({
-              context,
-              runId: clientRunId,
-              sessionKey: rawSessionKey,
-              message,
-            });
           }
           setGatewayDedupeEntry({
             dedupe: context.dedupe,

src/gateway/server.chat.gateway-server-chat.test.ts

@@ -497,6 +497,103 @@ describe("gateway server chat", () => {
     });
   });
 
+  test("routes /btw replies through side-result events without transcript injection", async () => {
+    await withMainSessionStore(async () => {
+      const replyMock = vi.mocked(getReplyFromConfig);
+      replyMock.mockResolvedValueOnce({
+        text: "323",
+        btw: { question: "what is 17 * 19?" },
+      });
+      const sideResultPromise = onceMessage(
+        ws,
+        (o) =>
+          o.type === "event" &&
+          o.event === "chat.side_result" &&
+          o.payload?.kind === "btw" &&
+          o.payload?.runId === "idem-btw-1",
+        8000,
+      );
+      const finalPromise = onceMessage(
+        ws,
+        (o) =>
+          o.type === "event" &&
+          o.event === "chat" &&
+          o.payload?.state === "final" &&
+          o.payload?.runId === "idem-btw-1",
+        8000,
+      );
+
+      const res = await rpcReq(ws, "chat.send", {
+        sessionKey: "main",
+        message: "/btw what is 17 * 19?",
+        idempotencyKey: "idem-btw-1",
+      });
+
+      expect(res.ok).toBe(true);
+      const sideResult = await sideResultPromise;
+      const finalEvent = await finalPromise;
+      expect(sideResult.payload).toMatchObject({
+        kind: "btw",
+        runId: "idem-btw-1",
+        sessionKey: "main",
+        question: "what is 17 * 19?",
+        text: "323",
+      });
+      expect(finalEvent.payload).toMatchObject({
+        runId: "idem-btw-1",
+        sessionKey: "main",
+        state: "final",
+      });
+
+      const historyRes = await rpcReq<{ messages?: unknown[] }>(ws, "chat.history", {
+        sessionKey: "main",
+      });
+      expect(historyRes.ok).toBe(true);
+      expect(historyRes.payload?.messages ?? []).toEqual([]);
+    });
+  });
+
+  test("routes block-streamed /btw replies through side-result events", async () => {
+    await withMainSessionStore(async () => {
+      const replyMock = vi.mocked(getReplyFromConfig);
+      replyMock.mockImplementationOnce(async (_ctx, opts) => {
+        await opts?.onBlockReply?.({
+          text: "first chunk",
+          btw: { question: "what changed?" },
+        });
+        await opts?.onBlockReply?.({
+          text: "second chunk",
+          btw: { question: "what changed?" },
+        });
+        return undefined;
+      });
+      const sideResultPromise = onceMessage(
+        ws,
+        (o) =>
+          o.type === "event" &&
+          o.event === "chat.side_result" &&
+          o.payload?.kind === "btw" &&
+          o.payload?.runId === "idem-btw-block-1",
+        8000,
+      );
+
+      const res = await rpcReq(ws, "chat.send", {
+        sessionKey: "main",
+        message: "/btw what changed?",
+        idempotencyKey: "idem-btw-block-1",
+      });
+
+      expect(res.ok).toBe(true);
+      const sideResult = await sideResultPromise;
+      expect(sideResult.payload).toMatchObject({
+        kind: "btw",
+        runId: "idem-btw-block-1",
+        question: "what changed?",
+        text: "first chunk\n\nsecond chunk",
+      });
+    });
+  });
+
   test("chat.history hides assistant NO_REPLY-only entries and keeps mixed-content assistant entries", async () => {
     const historyMessages = await loadChatHistoryWithMessages(buildNoReplyHistoryFixture(true));
     const roleAndText = historyMessages

src/infra/outbound/deliver.test.ts

@@ -1,22 +1,82 @@
 import path from "node:path";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { markdownToSignalTextChunks } from "../../../extensions/signal/src/format.js";
-import type { ChannelOutboundAdapter } from "../../channels/plugins/types.adapters.js";
+import { signalOutbound } from "../../channels/plugins/outbound/signal.js";
+import { telegramOutbound } from "../../channels/plugins/outbound/telegram.js";
+import { whatsappOutbound } from "../../channels/plugins/outbound/whatsapp.js";
 import type { OpenClawConfig } from "../../config/config.js";
 import { STATE_DIR } from "../../config/paths.js";
 import { setActivePluginRegistry } from "../../plugins/runtime.js";
 import { createOutboundTestPlugin, createTestRegistry } from "../../test-utils/channel-plugins.js";
 import { withEnvAsync } from "../../test-utils/env.js";
 import { createIMessageTestPlugin } from "../../test-utils/imessage-test-plugin.js";
+import { createInternalHookEventPayload } from "../../test-utils/internal-hook-event-payload.js";
 import { resolvePreferredOpenClawTmpDir } from "../tmp-openclaw-dir.js";
-import {
-  clearDeliverTestRegistry,
-  hookMocks,
-  resetDeliverTestState,
-  resetDeliverTestMocks,
-  runChunkedWhatsAppDelivery as runChunkedWhatsAppDeliveryHelper,
-  whatsappChunkConfig,
-} from "./deliver.test-helpers.js";
+
+const mocks = vi.hoisted(() => ({
+  appendAssistantMessageToSessionTranscript: vi.fn(async () => ({ ok: true, sessionFile: "x" })),
+}));
+const hookMocks = vi.hoisted(() => ({
+  runner: {
+    hasHooks: vi.fn(() => false),
+    runMessageSent: vi.fn(async () => {}),
+  },
+}));
+const internalHookMocks = vi.hoisted(() => ({
+  createInternalHookEvent: vi.fn(),
+  triggerInternalHook: vi.fn(async () => {}),
+}));
+const queueMocks = vi.hoisted(() => ({
+  enqueueDelivery: vi.fn(async () => "mock-queue-id"),
+  ackDelivery: vi.fn(async () => {}),
+  failDelivery: vi.fn(async () => {}),
+}));
+const logMocks = vi.hoisted(() => ({
+  warn: vi.fn(),
+}));
+
+vi.mock("../../config/sessions.js", async () => {
+  const actual = await vi.importActual<typeof import("../../config/sessions.js")>(
+    "../../config/sessions.js",
+  );
+  return {
+    ...actual,
+    appendAssistantMessageToSessionTranscript: mocks.appendAssistantMessageToSessionTranscript,
+  };
+});
+vi.mock("../../config/sessions/transcript.js", async () => {
+  const actual = await vi.importActual<typeof import("../../config/sessions/transcript.js")>(
+    "../../config/sessions/transcript.js",
+  );
+  return {
+    ...actual,
+    appendAssistantMessageToSessionTranscript: mocks.appendAssistantMessageToSessionTranscript,
+  };
+});
+vi.mock("../../plugins/hook-runner-global.js", () => ({
+  getGlobalHookRunner: () => hookMocks.runner,
+}));
+vi.mock("../../hooks/internal-hooks.js", () => ({
+  createInternalHookEvent: internalHookMocks.createInternalHookEvent,
+  triggerInternalHook: internalHookMocks.triggerInternalHook,
+}));
+vi.mock("./delivery-queue.js", () => ({
+  enqueueDelivery: queueMocks.enqueueDelivery,
+  ackDelivery: queueMocks.ackDelivery,
+  failDelivery: queueMocks.failDelivery,
+}));
+vi.mock("../../logging/subsystem.js", () => ({
+  createSubsystemLogger: () => {
+    const makeLogger = () => ({
+      warn: logMocks.warn,
+      info: vi.fn(),
+      error: vi.fn(),
+      debug: vi.fn(),
+      child: vi.fn(() => makeLogger()),
+    });
+    return makeLogger();
+  },
+}));
 
 const { deliverOutboundPayloads, normalizeOutboundPayloads } = await import("./deliver.js");
 
@@ -24,39 +84,19 @@ const telegramChunkConfig: OpenClawConfig = {
   channels: { telegram: { botToken: "tok-1", textChunkLimit: 2 } },
 };
 
+const whatsappChunkConfig: OpenClawConfig = {
+  channels: { whatsapp: { textChunkLimit: 4000 } },
+};
+
 type DeliverOutboundArgs = Parameters<typeof deliverOutboundPayloads>[0];
 type DeliverOutboundPayload = DeliverOutboundArgs["payloads"][number];
 type DeliverSession = DeliverOutboundArgs["session"];
 
-function setMatrixTextOnlyPlugin(sendText: NonNullable<ChannelOutboundAdapter["sendText"]>) {
-  setActivePluginRegistry(
-    createTestRegistry([
-      {
-        pluginId: "matrix",
-        source: "test",
-        plugin: createOutboundTestPlugin({
-          id: "matrix",
-          outbound: { deliveryMode: "direct", sendText },
-        }),
-      },
-    ]),
-  );
-}
-
-async function deliverMatrixPayloads(payloads: DeliverOutboundPayload[]) {
-  return deliverOutboundPayloads({
-    cfg: {},
-    channel: "matrix",
-    to: "!room:1",
-    payloads,
-  });
-}
-
 async function deliverWhatsAppPayload(params: {
   sendWhatsApp: NonNullable<
     NonNullable<Parameters<typeof deliverOutboundPayloads>[0]["deps"]>["sendWhatsApp"]
   >;
-  payload: { text: string; mediaUrl?: string };
+  payload: DeliverOutboundPayload;
   cfg?: OpenClawConfig;
 }) {
   return deliverOutboundPayloads({
@@ -86,14 +126,97 @@ async function deliverTelegramPayload(params: {
   });
 }
 
+async function runChunkedWhatsAppDelivery(params?: {
+  mirror?: Parameters<typeof deliverOutboundPayloads>[0]["mirror"];
+}) {
+  const sendWhatsApp = vi
+    .fn()
+    .mockResolvedValueOnce({ messageId: "w1", toJid: "jid" })
+    .mockResolvedValueOnce({ messageId: "w2", toJid: "jid" });
+  const cfg: OpenClawConfig = {
+    channels: { whatsapp: { textChunkLimit: 2 } },
+  };
+  const results = await deliverOutboundPayloads({
+    cfg,
+    channel: "whatsapp",
+    to: "+1555",
+    payloads: [{ text: "abcd" }],
+    deps: { sendWhatsApp },
+    ...(params?.mirror ? { mirror: params.mirror } : {}),
+  });
+  return { sendWhatsApp, results };
+}
+
+async function deliverSingleWhatsAppForHookTest(params?: { sessionKey?: string }) {
+  const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
+  await deliverOutboundPayloads({
+    cfg: whatsappChunkConfig,
+    channel: "whatsapp",
+    to: "+1555",
+    payloads: [{ text: "hello" }],
+    deps: { sendWhatsApp },
+    ...(params?.sessionKey ? { session: { key: params.sessionKey } } : {}),
+  });
+}
+
+async function runBestEffortPartialFailureDelivery() {
+  const sendWhatsApp = vi
+    .fn()
+    .mockRejectedValueOnce(new Error("fail"))
+    .mockResolvedValueOnce({ messageId: "w2", toJid: "jid" });
+  const onError = vi.fn();
+  const cfg: OpenClawConfig = {};
+  const results = await deliverOutboundPayloads({
+    cfg,
+    channel: "whatsapp",
+    to: "+1555",
+    payloads: [{ text: "a" }, { text: "b" }],
+    deps: { sendWhatsApp },
+    bestEffort: true,
+    onError,
+  });
+  return { sendWhatsApp, onError, results };
+}
+
+function expectSuccessfulWhatsAppInternalHookPayload(
+  expected: Partial<{
+    content: string;
+    messageId: string;
+    isGroup: boolean;
+    groupId: string;
+  }>,
+) {
+  return expect.objectContaining({
+    to: "+1555",
+    success: true,
+    channelId: "whatsapp",
+    conversationId: "+1555",
+    ...expected,
+  });
+}
+
 describe("deliverOutboundPayloads", () => {
   beforeEach(() => {
-    resetDeliverTestState();
-    resetDeliverTestMocks();
+    setActivePluginRegistry(defaultRegistry);
+    mocks.appendAssistantMessageToSessionTranscript.mockClear();
+    hookMocks.runner.hasHooks.mockClear();
+    hookMocks.runner.hasHooks.mockReturnValue(false);
+    hookMocks.runner.runMessageSent.mockClear();
+    hookMocks.runner.runMessageSent.mockResolvedValue(undefined);
+    internalHookMocks.createInternalHookEvent.mockClear();
+    internalHookMocks.createInternalHookEvent.mockImplementation(createInternalHookEventPayload);
+    internalHookMocks.triggerInternalHook.mockClear();
+    queueMocks.enqueueDelivery.mockClear();
+    queueMocks.enqueueDelivery.mockResolvedValue("mock-queue-id");
+    queueMocks.ackDelivery.mockClear();
+    queueMocks.ackDelivery.mockResolvedValue(undefined);
+    queueMocks.failDelivery.mockClear();
+    queueMocks.failDelivery.mockResolvedValue(undefined);
+    logMocks.warn.mockClear();
   });
 
   afterEach(() => {
-    clearDeliverTestRegistry();
+    setActivePluginRegistry(emptyRegistry);
   });
   it("chunks telegram markdown and passes through accountId", async () => {
     const sendTelegram = vi.fn().mockResolvedValue({ messageId: "m1", chatId: "c1" });
@@ -175,6 +298,24 @@ describe("deliverOutboundPayloads", () => {
     );
   });
 
+  it("formats BTW replies prominently for telegram delivery", async () => {
+    const sendTelegram = vi.fn().mockResolvedValue({ messageId: "m1", chatId: "c1" });
+
+    await deliverTelegramPayload({
+      sendTelegram,
+      cfg: {
+        channels: { telegram: { botToken: "tok-1", textChunkLimit: 100 } },
+      },
+      payload: { text: "323", btw: { question: "what is 17 * 19?" } },
+    });
+
+    expect(sendTelegram).toHaveBeenCalledWith(
+      "123",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
+      expect.objectContaining({ verbose: false, textMode: "html" }),
+    );
+  });
+
   it("preserves HTML text for telegram sendPayload channelData path", async () => {
     const sendTelegram = vi.fn().mockResolvedValue({ messageId: "m1", chatId: "c1" });
 
@@ -416,9 +557,7 @@ describe("deliverOutboundPayloads", () => {
   });
 
   it("chunks WhatsApp text and returns all results", async () => {
-    const { sendWhatsApp, results } = await runChunkedWhatsAppDeliveryHelper({
-      deliverOutboundPayloads,
-    });
+    const { sendWhatsApp, results } = await runChunkedWhatsAppDelivery();
 
     expect(sendWhatsApp).toHaveBeenCalledTimes(2);
     expect(results.map((r) => r.messageId)).toEqual(["w1", "w2"]);
@@ -614,6 +753,226 @@ describe("deliverOutboundPayloads", () => {
     ]);
   });
 
+  it("formats BTW replies prominently for whatsapp delivery", async () => {
+    const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
+
+    await deliverWhatsAppPayload({
+      sendWhatsApp,
+      payload: { text: "323", btw: { question: "what is 17 * 19?" } },
+    });
+
+    expect(sendWhatsApp).toHaveBeenCalledWith(
+      "+1555",
+      "BTW\nQuestion: what is 17 * 19?\n\n323",
+      expect.any(Object),
+    );
+  });
+
+  it("continues on errors when bestEffort is enabled", async () => {
+    const { sendWhatsApp, onError, results } = await runBestEffortPartialFailureDelivery();
+
+    expect(sendWhatsApp).toHaveBeenCalledTimes(2);
+    expect(onError).toHaveBeenCalledTimes(1);
+    expect(results).toEqual([{ channel: "whatsapp", messageId: "w2", toJid: "jid" }]);
+  });
+
+  it("emits internal message:sent hook with success=true for chunked payload delivery", async () => {
+    const { sendWhatsApp } = await runChunkedWhatsAppDelivery({
+      mirror: {
+        sessionKey: "agent:main:main",
+        isGroup: true,
+        groupId: "whatsapp:group:123",
+      },
+    });
+    expect(sendWhatsApp).toHaveBeenCalledTimes(2);
+
+    expect(internalHookMocks.createInternalHookEvent).toHaveBeenCalledTimes(1);
+    expect(internalHookMocks.createInternalHookEvent).toHaveBeenCalledWith(
+      "message",
+      "sent",
+      "agent:main:main",
+      expectSuccessfulWhatsAppInternalHookPayload({
+        content: "abcd",
+        messageId: "w2",
+        isGroup: true,
+        groupId: "whatsapp:group:123",
+      }),
+    );
+    expect(internalHookMocks.triggerInternalHook).toHaveBeenCalledTimes(1);
+  });
+
+  it("does not emit internal message:sent hook when neither mirror nor sessionKey is provided", async () => {
+    await deliverSingleWhatsAppForHookTest();
+
+    expect(internalHookMocks.createInternalHookEvent).not.toHaveBeenCalled();
+    expect(internalHookMocks.triggerInternalHook).not.toHaveBeenCalled();
+  });
+
+  it("emits internal message:sent hook when sessionKey is provided without mirror", async () => {
+    await deliverSingleWhatsAppForHookTest({ sessionKey: "agent:main:main" });
+
+    expect(internalHookMocks.createInternalHookEvent).toHaveBeenCalledTimes(1);
+    expect(internalHookMocks.createInternalHookEvent).toHaveBeenCalledWith(
+      "message",
+      "sent",
+      "agent:main:main",
+      expectSuccessfulWhatsAppInternalHookPayload({ content: "hello", messageId: "w1" }),
+    );
+    expect(internalHookMocks.triggerInternalHook).toHaveBeenCalledTimes(1);
+  });
+
+  it("warns when session.agentId is set without a session key", async () => {
+    const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
+    hookMocks.runner.hasHooks.mockReturnValue(true);
+
+    await deliverOutboundPayloads({
+      cfg: whatsappChunkConfig,
+      channel: "whatsapp",
+      to: "+1555",
+      payloads: [{ text: "hello" }],
+      deps: { sendWhatsApp },
+      session: { agentId: "agent-main" },
+    });
+
+    expect(logMocks.warn).toHaveBeenCalledWith(
+      "deliverOutboundPayloads: session.agentId present without session key; internal message:sent hook will be skipped",
+      expect.objectContaining({ channel: "whatsapp", to: "+1555", agentId: "agent-main" }),
+    );
+  });
+
+  it("calls failDelivery instead of ackDelivery on bestEffort partial failure", async () => {
+    const { onError } = await runBestEffortPartialFailureDelivery();
+
+    // onError was called for the first payload's failure.
+    expect(onError).toHaveBeenCalledTimes(1);
+
+    // Queue entry should NOT be acked — failDelivery should be called instead.
+    expect(queueMocks.ackDelivery).not.toHaveBeenCalled();
+    expect(queueMocks.failDelivery).toHaveBeenCalledWith(
+      "mock-queue-id",
+      "partial delivery failure (bestEffort)",
+    );
+  });
+
+  it("acks the queue entry when delivery is aborted", async () => {
+    const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
+    const abortController = new AbortController();
+    abortController.abort();
+    const cfg: OpenClawConfig = {};
+
+    await expect(
+      deliverOutboundPayloads({
+        cfg,
+        channel: "whatsapp",
+        to: "+1555",
+        payloads: [{ text: "a" }],
+        deps: { sendWhatsApp },
+        abortSignal: abortController.signal,
+      }),
+    ).rejects.toThrow("Operation aborted");
+
+    expect(queueMocks.ackDelivery).toHaveBeenCalledWith("mock-queue-id");
+    expect(queueMocks.failDelivery).not.toHaveBeenCalled();
+    expect(sendWhatsApp).not.toHaveBeenCalled();
+  });
+
+  it("passes normalized payload to onError", async () => {
+    const sendWhatsApp = vi.fn().mockRejectedValue(new Error("boom"));
+    const onError = vi.fn();
+    const cfg: OpenClawConfig = {};
+
+    await deliverOutboundPayloads({
+      cfg,
+      channel: "whatsapp",
+      to: "+1555",
+      payloads: [{ text: "hi", mediaUrl: "https://x.test/a.jpg" }],
+      deps: { sendWhatsApp },
+      bestEffort: true,
+      onError,
+    });
+
+    expect(onError).toHaveBeenCalledTimes(1);
+    expect(onError).toHaveBeenCalledWith(
+      expect.any(Error),
+      expect.objectContaining({ text: "hi", mediaUrls: ["https://x.test/a.jpg"] }),
+    );
+  });
+
+  it("mirrors delivered output when mirror options are provided", async () => {
+    const sendTelegram = vi.fn().mockResolvedValue({ messageId: "m1", chatId: "c1" });
+    mocks.appendAssistantMessageToSessionTranscript.mockClear();
+
+    await deliverOutboundPayloads({
+      cfg: telegramChunkConfig,
+      channel: "telegram",
+      to: "123",
+      payloads: [{ text: "caption", mediaUrl: "https://example.com/files/report.pdf?sig=1" }],
+      deps: { sendTelegram },
+      mirror: {
+        sessionKey: "agent:main:main",
+        text: "caption",
+        mediaUrls: ["https://example.com/files/report.pdf?sig=1"],
+        idempotencyKey: "idem-deliver-1",
+      },
+    });
+
+    expect(mocks.appendAssistantMessageToSessionTranscript).toHaveBeenCalledWith(
+      expect.objectContaining({
+        text: "report.pdf",
+        idempotencyKey: "idem-deliver-1",
+      }),
+    );
+  });
+
+  it("emits message_sent success for text-only deliveries", async () => {
+    hookMocks.runner.hasHooks.mockReturnValue(true);
+    const sendWhatsApp = vi.fn().mockResolvedValue({ messageId: "w1", toJid: "jid" });
+
+    await deliverOutboundPayloads({
+      cfg: {},
+      channel: "whatsapp",
+      to: "+1555",
+      payloads: [{ text: "hello" }],
+      deps: { sendWhatsApp },
+    });
+
+    expect(hookMocks.runner.runMessageSent).toHaveBeenCalledWith(
+      expect.objectContaining({ to: "+1555", content: "hello", success: true }),
+      expect.objectContaining({ channelId: "whatsapp" }),
+    );
+  });
+
+  it("emits message_sent success for sendPayload deliveries", async () => {
+    hookMocks.runner.hasHooks.mockReturnValue(true);
+    const sendPayload = vi.fn().mockResolvedValue({ channel: "matrix", messageId: "mx-1" });
+    const sendText = vi.fn();
+    const sendMedia = vi.fn();
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "matrix",
+          source: "test",
+          plugin: createOutboundTestPlugin({
+            id: "matrix",
+            outbound: { deliveryMode: "direct", sendPayload, sendText, sendMedia },
+          }),
+        },
+      ]),
+    );
+
+    await deliverOutboundPayloads({
+      cfg: {},
+      channel: "matrix",
+      to: "!room:1",
+      payloads: [{ text: "payload text", channelData: { mode: "custom" } }],
+    });
+
+    expect(hookMocks.runner.runMessageSent).toHaveBeenCalledWith(
+      expect.objectContaining({ to: "!room:1", content: "payload text", success: true }),
+      expect.objectContaining({ channelId: "matrix" }),
+    );
+  });
+
   it("preserves channelData-only payloads with empty text for non-WhatsApp sendPayload channels", async () => {
     const sendPayload = vi.fn().mockResolvedValue({ channel: "line", messageId: "ln-1" });
     const sendText = vi.fn();
@@ -649,11 +1008,25 @@ describe("deliverOutboundPayloads", () => {
 
   it("falls back to sendText when plugin outbound omits sendMedia", async () => {
     const sendText = vi.fn().mockResolvedValue({ channel: "matrix", messageId: "mx-1" });
-    setMatrixTextOnlyPlugin(sendText);
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "matrix",
+          source: "test",
+          plugin: createOutboundTestPlugin({
+            id: "matrix",
+            outbound: { deliveryMode: "direct", sendText },
+          }),
+        },
+      ]),
+    );
 
-    const results = await deliverMatrixPayloads([
-      { text: "caption", mediaUrl: "https://example.com/file.png" },
-    ]);
+    const results = await deliverOutboundPayloads({
+      cfg: {},
+      channel: "matrix",
+      to: "!room:1",
+      payloads: [{ text: "caption", mediaUrl: "https://example.com/file.png" }],
+    });
 
     expect(sendText).toHaveBeenCalledTimes(1);
     expect(sendText).toHaveBeenCalledWith(
@@ -661,19 +1034,42 @@ describe("deliverOutboundPayloads", () => {
         text: "caption",
       }),
     );
+    expect(logMocks.warn).toHaveBeenCalledWith(
+      "Plugin outbound adapter does not implement sendMedia; media URLs will be dropped and text fallback will be used",
+      expect.objectContaining({
+        channel: "matrix",
+        mediaCount: 1,
+      }),
+    );
     expect(results).toEqual([{ channel: "matrix", messageId: "mx-1" }]);
   });
 
   it("falls back to one sendText call for multi-media payloads when sendMedia is omitted", async () => {
     const sendText = vi.fn().mockResolvedValue({ channel: "matrix", messageId: "mx-2" });
-    setMatrixTextOnlyPlugin(sendText);
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "matrix",
+          source: "test",
+          plugin: createOutboundTestPlugin({
+            id: "matrix",
+            outbound: { deliveryMode: "direct", sendText },
+          }),
+        },
+      ]),
+    );
 
-    const results = await deliverMatrixPayloads([
-      {
-        text: "caption",
-        mediaUrls: ["https://example.com/a.png", "https://example.com/b.png"],
-      },
-    ]);
+    const results = await deliverOutboundPayloads({
+      cfg: {},
+      channel: "matrix",
+      to: "!room:1",
+      payloads: [
+        {
+          text: "caption",
+          mediaUrls: ["https://example.com/a.png", "https://example.com/b.png"],
+        },
+      ],
+    });
 
     expect(sendText).toHaveBeenCalledTimes(1);
     expect(sendText).toHaveBeenCalledWith(
@@ -681,20 +1077,109 @@ describe("deliverOutboundPayloads", () => {
         text: "caption",
       }),
     );
+    expect(logMocks.warn).toHaveBeenCalledWith(
+      "Plugin outbound adapter does not implement sendMedia; media URLs will be dropped and text fallback will be used",
+      expect.objectContaining({
+        channel: "matrix",
+        mediaCount: 2,
+      }),
+    );
     expect(results).toEqual([{ channel: "matrix", messageId: "mx-2" }]);
   });
 
   it("fails media-only payloads when plugin outbound omits sendMedia", async () => {
     hookMocks.runner.hasHooks.mockReturnValue(true);
     const sendText = vi.fn().mockResolvedValue({ channel: "matrix", messageId: "mx-3" });
-    setMatrixTextOnlyPlugin(sendText);
+    setActivePluginRegistry(
+      createTestRegistry([
+        {
+          pluginId: "matrix",
+          source: "test",
+          plugin: createOutboundTestPlugin({
+            id: "matrix",
+            outbound: { deliveryMode: "direct", sendText },
+          }),
+        },
+      ]),
+    );
 
     await expect(
-      deliverMatrixPayloads([{ text: "   ", mediaUrl: "https://example.com/file.png" }]),
+      deliverOutboundPayloads({
+        cfg: {},
+        channel: "matrix",
+        to: "!room:1",
+        payloads: [{ text: "   ", mediaUrl: "https://example.com/file.png" }],
+      }),
     ).rejects.toThrow(
       "Plugin outbound adapter does not implement sendMedia and no text fallback is available for media payload",
     );
 
     expect(sendText).not.toHaveBeenCalled();
+    expect(logMocks.warn).toHaveBeenCalledWith(
+      "Plugin outbound adapter does not implement sendMedia; media URLs will be dropped and text fallback will be used",
+      expect.objectContaining({
+        channel: "matrix",
+        mediaCount: 1,
+      }),
+    );
+    expect(hookMocks.runner.runMessageSent).toHaveBeenCalledWith(
+      expect.objectContaining({
+        to: "!room:1",
+        content: "",
+        success: false,
+        error:
+          "Plugin outbound adapter does not implement sendMedia and no text fallback is available for media payload",
+      }),
+      expect.objectContaining({ channelId: "matrix" }),
+    );
+  });
+
+  it("emits message_sent failure when delivery errors", async () => {
+    hookMocks.runner.hasHooks.mockReturnValue(true);
+    const sendWhatsApp = vi.fn().mockRejectedValue(new Error("downstream failed"));
+
+    await expect(
+      deliverOutboundPayloads({
+        cfg: {},
+        channel: "whatsapp",
+        to: "+1555",
+        payloads: [{ text: "hi" }],
+        deps: { sendWhatsApp },
+      }),
+    ).rejects.toThrow("downstream failed");
+
+    expect(hookMocks.runner.runMessageSent).toHaveBeenCalledWith(
+      expect.objectContaining({
+        to: "+1555",
+        content: "hi",
+        success: false,
+        error: "downstream failed",
+      }),
+      expect.objectContaining({ channelId: "whatsapp" }),
+    );
   });
 });
+
+const emptyRegistry = createTestRegistry([]);
+const defaultRegistry = createTestRegistry([
+  {
+    pluginId: "telegram",
+    plugin: createOutboundTestPlugin({ id: "telegram", outbound: telegramOutbound }),
+    source: "test",
+  },
+  {
+    pluginId: "signal",
+    plugin: createOutboundTestPlugin({ id: "signal", outbound: signalOutbound }),
+    source: "test",
+  },
+  {
+    pluginId: "whatsapp",
+    plugin: createOutboundTestPlugin({ id: "whatsapp", outbound: whatsappOutbound }),
+    source: "test",
+  },
+  {
+    pluginId: "imessage",
+    plugin: createIMessageTestPlugin(),
+    source: "test",
+  },
+]);

src/infra/outbound/payloads.ts

@@ -1,5 +1,6 @@
 import { parseReplyDirectives } from "../../auto-reply/reply/reply-directives.js";
 import {
+  formatBtwTextForExternalDelivery,
   isRenderablePayload,
   shouldSuppressReasoningPayload,
 } from "../../auto-reply/reply/reply-payloads.js";
@@ -59,7 +60,11 @@ export function normalizeReplyPayloadsForDelivery(
     const resolvedMediaUrl = hasMultipleMedia ? undefined : explicitMediaUrl;
     const next: ReplyPayload = {
       ...payload,
-      text: parsed.text ?? "",
+      text:
+        formatBtwTextForExternalDelivery({
+          ...payload,
+          text: parsed.text ?? "",
+        }) ?? "",
       mediaUrls: mergedMedia.length ? mergedMedia : undefined,
       mediaUrl: resolvedMediaUrl,
       replyToId: payload.replyToId ?? parsed.replyToId,

src/plugins/commands.ts

@@ -37,6 +37,7 @@ const RESERVED_COMMANDS = new Set([
   "status",
   "whoami",
   "context",
+  "btw",
   // Session management
   "stop",
   "restart",

src/tui/components/btw-inline-message.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from "vitest";
+import { BtwInlineMessage } from "./btw-inline-message.js";
+
+describe("btw inline message", () => {
+  it("renders the BTW question, answer, and dismiss hint inline", () => {
+    const message = new BtwInlineMessage({
+      question: "what is 17 * 19?",
+      text: "323",
+    });
+
+    const rendered = message.render(80).join("\n");
+    expect(rendered).toContain("BTW: what is 17 * 19?");
+    expect(rendered).toContain("323");
+    expect(rendered).toContain("Press Enter or Esc to dismiss");
+  });
+});

src/tui/components/btw-inline-message.ts

@@ -0,0 +1,28 @@
+import { Container, Spacer, Text } from "@mariozechner/pi-tui";
+import { theme } from "../theme/theme.js";
+import { AssistantMessageComponent } from "./assistant-message.js";
+
+type BtwInlineMessageParams = {
+  question: string;
+  text: string;
+  isError?: boolean;
+};
+
+export class BtwInlineMessage extends Container {
+  constructor(params: BtwInlineMessageParams) {
+    super();
+    this.setResult(params);
+  }
+
+  setResult(params: BtwInlineMessageParams) {
+    this.clear();
+    this.addChild(new Spacer(1));
+    this.addChild(new Text(theme.header(`BTW: ${params.question}`), 1, 0));
+    if (params.isError) {
+      this.addChild(new Text(theme.error(params.text), 1, 0));
+    } else {
+      this.addChild(new AssistantMessageComponent(params.text));
+    }
+    this.addChild(new Text(theme.dim("Press Enter or Esc to dismiss"), 1, 0));
+  }
+}

src/tui/components/chat-log.test.ts

@@ -52,4 +52,25 @@ describe("ChatLog", () => {
 
     expect(chatLog.children.length).toBe(20);
   });
+
+  it("renders BTW inline and removes it when dismissed", () => {
+    const chatLog = new ChatLog(40);
+
+    chatLog.addSystem("session agent:main:main");
+    chatLog.showBtw({
+      question: "what is 17 * 19?",
+      text: "323",
+    });
+
+    let rendered = chatLog.render(120).join("\n");
+    expect(rendered).toContain("BTW: what is 17 * 19?");
+    expect(rendered).toContain("323");
+    expect(chatLog.hasVisibleBtw()).toBe(true);
+
+    chatLog.dismissBtw();
+
+    rendered = chatLog.render(120).join("\n");
+    expect(rendered).not.toContain("BTW: what is 17 * 19?");
+    expect(chatLog.hasVisibleBtw()).toBe(false);
+  });
 });

src/tui/components/chat-log.ts

@@ -2,6 +2,7 @@ import type { Component } from "@mariozechner/pi-tui";
 import { Container, Spacer, Text } from "@mariozechner/pi-tui";
 import { theme } from "../theme/theme.js";
 import { AssistantMessageComponent } from "./assistant-message.js";
+import { BtwInlineMessage } from "./btw-inline-message.js";
 import { ToolExecutionComponent } from "./tool-execution.js";
 import { UserMessageComponent } from "./user-message.js";
 
@@ -9,6 +10,7 @@ export class ChatLog extends Container {
   private readonly maxComponents: number;
   private toolById = new Map<string, ToolExecutionComponent>();
   private streamingRuns = new Map<string, AssistantMessageComponent>();
+  private btwMessage: BtwInlineMessage | null = null;
   private toolsExpanded = false;
 
   constructor(maxComponents = 180) {
@@ -27,6 +29,9 @@ export class ChatLog extends Container {
         this.streamingRuns.delete(runId);
       }
     }
+    if (this.btwMessage === component) {
+      this.btwMessage = null;
+    }
   }
 
   private pruneOverflow() {
@@ -49,6 +54,7 @@ export class ChatLog extends Container {
     this.clear();
     this.toolById.clear();
     this.streamingRuns.clear();
+    this.btwMessage = null;
   }
 
   addSystem(text: string) {
@@ -108,6 +114,33 @@ export class ChatLog extends Container {
     this.streamingRuns.delete(effectiveRunId);
   }
 
+  showBtw(params: { question: string; text: string; isError?: boolean }) {
+    if (this.btwMessage) {
+      this.btwMessage.setResult(params);
+      if (this.children[this.children.length - 1] !== this.btwMessage) {
+        this.removeChild(this.btwMessage);
+        this.append(this.btwMessage);
+      }
+      return this.btwMessage;
+    }
+    const component = new BtwInlineMessage(params);
+    this.btwMessage = component;
+    this.append(component);
+    return component;
+  }
+
+  dismissBtw() {
+    if (!this.btwMessage) {
+      return;
+    }
+    this.removeChild(this.btwMessage);
+    this.btwMessage = null;
+  }
+
+  hasVisibleBtw() {
+    return this.btwMessage !== null;
+  }
+
   startTool(toolCallId: string, toolName: string, args: unknown) {
     const existing = this.toolById.get(toolCallId);
     if (existing) {

src/tui/tui-command-handlers.test.ts

@@ -12,6 +12,7 @@ function createHarness(params?: {
   loadHistory?: LoadHistoryMock;
   setActivityStatus?: SetActivityStatusMock;
   isConnected?: boolean;
+  activeChatRunId?: string | null;
 }) {
   const sendChat = params?.sendChat ?? vi.fn().mockResolvedValue({ runId: "r1" });
   const resetSession = params?.resetSession ?? vi.fn().mockResolvedValue({ ok: true });
@@ -19,21 +20,24 @@ function createHarness(params?: {
   const addUser = vi.fn();
   const addSystem = vi.fn();
   const requestRender = vi.fn();
+  const noteLocalRunId = vi.fn();
+  const noteLocalBtwRunId = vi.fn();
   const loadHistory =
     params?.loadHistory ?? (vi.fn().mockResolvedValue(undefined) as LoadHistoryMock);
   const setActivityStatus = params?.setActivityStatus ?? (vi.fn() as SetActivityStatusMock);
+  const state = {
+    currentSessionKey: "agent:main:main",
+    activeChatRunId: params?.activeChatRunId ?? null,
+    isConnected: params?.isConnected ?? true,
+    sessionInfo: {},
+  };
 
   const { handleCommand } = createCommandHandlers({
     client: { sendChat, resetSession } as never,
     chatLog: { addUser, addSystem } as never,
     tui: { requestRender } as never,
     opts: {},
-    state: {
-      currentSessionKey: "agent:main:main",
-      activeChatRunId: null,
-      isConnected: params?.isConnected ?? true,
-      sessionInfo: {},
-    } as never,
+    state: state as never,
     deliverDefault: false,
     openOverlay: vi.fn(),
     closeOverlay: vi.fn(),
@@ -45,8 +49,10 @@ function createHarness(params?: {
     setActivityStatus,
     formatSessionKey: vi.fn(),
     applySessionInfoFromPatch: vi.fn(),
-    noteLocalRunId: vi.fn(),
+    noteLocalRunId,
+    noteLocalBtwRunId,
     forgetLocalRunId: vi.fn(),
+    forgetLocalBtwRunId: vi.fn(),
     requestExit: vi.fn(),
   });
 
@@ -60,6 +66,9 @@ function createHarness(params?: {
     requestRender,
     loadHistory,
     setActivityStatus,
+    noteLocalRunId,
+    noteLocalBtwRunId,
+    state,
   };
 }
 
@@ -108,6 +117,29 @@ describe("tui command handlers", () => {
     expect(requestRender).toHaveBeenCalled();
   });
 
+  it("sends /btw without hijacking the active main run", async () => {
+    const setActivityStatus = vi.fn();
+    const { handleCommand, sendChat, addUser, noteLocalRunId, noteLocalBtwRunId, state } =
+      createHarness({
+        activeChatRunId: "run-main",
+        setActivityStatus,
+      });
+
+    await handleCommand("/btw what changed?");
+
+    expect(addUser).not.toHaveBeenCalled();
+    expect(noteLocalRunId).not.toHaveBeenCalled();
+    expect(noteLocalBtwRunId).toHaveBeenCalledTimes(1);
+    expect(state.activeChatRunId).toBe("run-main");
+    expect(setActivityStatus).not.toHaveBeenCalledWith("sending");
+    expect(setActivityStatus).not.toHaveBeenCalledWith("waiting");
+    expect(sendChat).toHaveBeenCalledWith(
+      expect.objectContaining({
+        message: "/btw what changed?",
+      }),
+    );
+  });
+
   it("creates unique session for /new and resets shared session for /reset", async () => {
     const loadHistory = vi.fn().mockResolvedValue(undefined);
     const setSessionMock = vi.fn().mockResolvedValue(undefined) as SetSessionMock;

src/tui/tui-command-handlers.ts

@@ -43,10 +43,16 @@ type CommandHandlerContext = {
   formatSessionKey: (key: string) => string;
   applySessionInfoFromPatch: (result: SessionsPatchResult) => void;
   noteLocalRunId: (runId: string) => void;
+  noteLocalBtwRunId?: (runId: string) => void;
   forgetLocalRunId?: (runId: string) => void;
+  forgetLocalBtwRunId?: (runId: string) => void;
   requestExit: () => void;
 };
 
+function isBtwCommand(text: string): boolean {
+  return /^\/btw(?::|\s|$)/i.test(text.trim());
+}
+
 export function createCommandHandlers(context: CommandHandlerContext) {
   const {
     client,
@@ -66,7 +72,9 @@ export function createCommandHandlers(context: CommandHandlerContext) {
     formatSessionKey,
     applySessionInfoFromPatch,
     noteLocalRunId,
+    noteLocalBtwRunId,
     forgetLocalRunId,
+    forgetLocalBtwRunId,
     requestExit,
   } = context;
 
@@ -501,13 +509,17 @@ export function createCommandHandlers(context: CommandHandlerContext) {
       tui.requestRender();
       return;
     }
+    const isBtw = isBtwCommand(text);
+    const runId = randomUUID();
     try {
-      chatLog.addUser(text);
-      tui.requestRender();
-      const runId = randomUUID();
-      noteLocalRunId(runId);
-      state.activeChatRunId = runId;
-      setActivityStatus("sending");
+      if (!isBtw) {
+        chatLog.addUser(text);
+        noteLocalRunId(runId);
+        state.activeChatRunId = runId;
+        setActivityStatus("sending");
+      } else {
+        noteLocalBtwRunId?.(runId);
+      }
       tui.requestRender();
       await client.sendChat({
         sessionKey: state.currentSessionKey,
@@ -517,15 +529,24 @@ export function createCommandHandlers(context: CommandHandlerContext) {
         timeoutMs: opts.timeoutMs,
         runId,
       });
-      setActivityStatus("waiting");
-      tui.requestRender();
+      if (!isBtw) {
+        setActivityStatus("waiting");
+        tui.requestRender();
+      }
     } catch (err) {
-      if (state.activeChatRunId) {
+      if (isBtw) {
+        forgetLocalBtwRunId?.(runId);
+      }
+      if (!isBtw && state.activeChatRunId) {
         forgetLocalRunId?.(state.activeChatRunId);
       }
-      state.activeChatRunId = null;
-      chatLog.addSystem(`send failed: ${String(err)}`);
-      setActivityStatus("error");
+      if (!isBtw) {
+        state.activeChatRunId = null;
+      }
+      chatLog.addSystem(`${isBtw ? "btw failed" : "send failed"}: ${String(err)}`);
+      if (!isBtw) {
+        setActivityStatus("error");
+      }
       tui.requestRender();
     }
   };

src/tui/tui-event-handlers.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it, vi } from "vitest";
 import { createEventHandlers } from "./tui-event-handlers.js";
-import type { AgentEvent, ChatEvent, TuiStateAccess } from "./tui-types.js";
+import type { AgentEvent, BtwEvent, ChatEvent, TuiStateAccess } from "./tui-types.js";
 
 type MockFn = ReturnType<typeof vi.fn>;
 type HandlerChatLog = {
@@ -11,6 +11,10 @@ type HandlerChatLog = {
   finalizeAssistant: (...args: unknown[]) => void;
   dropAssistant: (...args: unknown[]) => void;
 };
+type HandlerBtwPresenter = {
+  showResult: (...args: unknown[]) => void;
+  clear: (...args: unknown[]) => void;
+};
 type HandlerTui = { requestRender: (...args: unknown[]) => void };
 type MockChatLog = {
   startTool: MockFn;
@@ -20,6 +24,10 @@ type MockChatLog = {
   finalizeAssistant: MockFn;
   dropAssistant: MockFn;
 };
+type MockBtwPresenter = {
+  showResult: MockFn;
+  clear: MockFn;
+};
 type MockTui = { requestRender: MockFn };
 
 function createMockChatLog(): MockChatLog & HandlerChatLog {
@@ -33,6 +41,13 @@ function createMockChatLog(): MockChatLog & HandlerChatLog {
   } as unknown as MockChatLog & HandlerChatLog;
 }
 
+function createMockBtwPresenter(): MockBtwPresenter & HandlerBtwPresenter {
+  return {
+    showResult: vi.fn(),
+    clear: vi.fn(),
+  } as unknown as MockBtwPresenter & HandlerBtwPresenter;
+}
+
 describe("tui-event-handlers: handleAgentEvent", () => {
   const makeState = (overrides?: Partial<TuiStateAccess>): TuiStateAccess => ({
     agentDefaultId: "main",
@@ -59,50 +74,69 @@ describe("tui-event-handlers: handleAgentEvent", () => {
 
   const makeContext = (state: TuiStateAccess) => {
     const chatLog = createMockChatLog();
+    const btw = createMockBtwPresenter();
     const tui = { requestRender: vi.fn() } as unknown as MockTui & HandlerTui;
     const setActivityStatus = vi.fn();
     const loadHistory = vi.fn();
     const localRunIds = new Set<string>();
+    const localBtwRunIds = new Set<string>();
     const noteLocalRunId = (runId: string) => {
       localRunIds.add(runId);
     };
     const forgetLocalRunId = localRunIds.delete.bind(localRunIds);
     const isLocalRunId = localRunIds.has.bind(localRunIds);
     const clearLocalRunIds = localRunIds.clear.bind(localRunIds);
+    const noteLocalBtwRunId = (runId: string) => {
+      localBtwRunIds.add(runId);
+    };
+    const forgetLocalBtwRunId = localBtwRunIds.delete.bind(localBtwRunIds);
+    const isLocalBtwRunId = localBtwRunIds.has.bind(localBtwRunIds);
+    const clearLocalBtwRunIds = localBtwRunIds.clear.bind(localBtwRunIds);
 
     return {
       chatLog,
+      btw,
       tui,
       state,
       setActivityStatus,
       loadHistory,
       noteLocalRunId,
+      noteLocalBtwRunId,
       forgetLocalRunId,
       isLocalRunId,
       clearLocalRunIds,
+      forgetLocalBtwRunId,
+      isLocalBtwRunId,
+      clearLocalBtwRunIds,
     };
   };
 
   const createHandlersHarness = (params?: {
     state?: Partial<TuiStateAccess>;
     chatLog?: HandlerChatLog;
+    btw?: HandlerBtwPresenter;
   }) => {
     const state = makeState(params?.state);
     const context = makeContext(state);
     const chatLog = (params?.chatLog ?? context.chatLog) as MockChatLog & HandlerChatLog;
     const handlers = createEventHandlers({
       chatLog,
+      btw: (params?.btw ?? context.btw) as MockBtwPresenter & HandlerBtwPresenter,
       tui: context.tui,
       state,
       setActivityStatus: context.setActivityStatus,
       loadHistory: context.loadHistory,
       isLocalRunId: context.isLocalRunId,
       forgetLocalRunId: context.forgetLocalRunId,
+      isLocalBtwRunId: context.isLocalBtwRunId,
+      forgetLocalBtwRunId: context.forgetLocalBtwRunId,
+      clearLocalBtwRunIds: context.clearLocalBtwRunIds,
     });
     return {
       ...context,
       state,
       chatLog,
+      btw: (params?.btw ?? context.btw) as MockBtwPresenter & HandlerBtwPresenter,
       ...handlers,
     };
   };
@@ -212,6 +246,62 @@ describe("tui-event-handlers: handleAgentEvent", () => {
     expect(chatLog.updateAssistant).toHaveBeenCalledWith("hello", "run-alias");
   });
 
+  it("renders BTW results separately without disturbing the active run", () => {
+    const { state, btw, setActivityStatus, loadHistory, tui, handleBtwEvent } =
+      createHandlersHarness({
+        state: { activeChatRunId: "run-main" },
+      });
+
+    const evt: BtwEvent = {
+      kind: "btw",
+      runId: "run-btw",
+      sessionKey: state.currentSessionKey,
+      question: "what changed?",
+      text: "nothing important",
+    };
+
+    handleBtwEvent(evt);
+
+    expect(state.activeChatRunId).toBe("run-main");
+    expect(btw.showResult).toHaveBeenCalledWith({
+      question: "what changed?",
+      text: "nothing important",
+      isError: undefined,
+    });
+    expect(setActivityStatus).not.toHaveBeenCalled();
+    expect(loadHistory).not.toHaveBeenCalled();
+    expect(tui.requestRender).toHaveBeenCalledTimes(1);
+  });
+
+  it("keeps a local BTW result visible when its empty final chat event arrives", () => {
+    const { state, btw, loadHistory, noteLocalBtwRunId, handleBtwEvent, handleChatEvent } =
+      createHandlersHarness({
+        state: { activeChatRunId: null },
+      });
+
+    noteLocalBtwRunId("run-btw");
+    handleBtwEvent({
+      kind: "btw",
+      runId: "run-btw",
+      sessionKey: state.currentSessionKey,
+      question: "what changed?",
+      text: "nothing important",
+    } satisfies BtwEvent);
+
+    handleChatEvent({
+      runId: "run-btw",
+      sessionKey: state.currentSessionKey,
+      state: "final",
+    } satisfies ChatEvent);
+
+    expect(loadHistory).not.toHaveBeenCalled();
+    expect(btw.showResult).toHaveBeenCalledWith({
+      question: "what changed?",
+      text: "nothing important",
+      isError: undefined,
+    });
+  });
+
   it("does not cross-match canonical session keys from different agents", () => {
     const { chatLog, handleChatEvent } = createHandlersHarness({
       state: {

src/tui/tui-event-handlers.ts

@@ -1,7 +1,7 @@
 import { parseAgentSessionKey } from "../sessions/session-key-utils.js";
 import { asString, extractTextFromMessage, isCommandMessage } from "./tui-formatters.js";
 import { TuiStreamAssembler } from "./tui-stream-assembler.js";
-import type { AgentEvent, ChatEvent, TuiStateAccess } from "./tui-types.js";
+import type { AgentEvent, BtwEvent, ChatEvent, TuiStateAccess } from "./tui-types.js";
 
 type EventHandlerChatLog = {
   startTool: (toolCallId: string, toolName: string, args: unknown) => void;
@@ -20,8 +20,14 @@ type EventHandlerTui = {
   requestRender: () => void;
 };
 
+type EventHandlerBtwPresenter = {
+  showResult: (params: { question: string; text: string; isError?: boolean }) => void;
+  clear: () => void;
+};
+
 type EventHandlerContext = {
   chatLog: EventHandlerChatLog;
+  btw: EventHandlerBtwPresenter;
   tui: EventHandlerTui;
   state: TuiStateAccess;
   setActivityStatus: (text: string) => void;
@@ -30,11 +36,15 @@ type EventHandlerContext = {
   isLocalRunId?: (runId: string) => boolean;
   forgetLocalRunId?: (runId: string) => void;
   clearLocalRunIds?: () => void;
+  isLocalBtwRunId?: (runId: string) => boolean;
+  forgetLocalBtwRunId?: (runId: string) => void;
+  clearLocalBtwRunIds?: () => void;
 };
 
 export function createEventHandlers(context: EventHandlerContext) {
   const {
     chatLog,
+    btw,
     tui,
     state,
     setActivityStatus,
@@ -43,6 +53,9 @@ export function createEventHandlers(context: EventHandlerContext) {
     isLocalRunId,
     forgetLocalRunId,
     clearLocalRunIds,
+    isLocalBtwRunId,
+    forgetLocalBtwRunId,
+    clearLocalBtwRunIds,
   } = context;
   const finalizedRuns = new Map<string, number>();
   const sessionRuns = new Map<string, number>();
@@ -81,6 +94,8 @@ export function createEventHandlers(context: EventHandlerContext) {
     sessionRuns.clear();
     streamAssembler = new TuiStreamAssembler();
     clearLocalRunIds?.();
+    clearLocalBtwRunIds?.();
+    btw.clear();
   };
 
   const noteSessionRun = (runId: string) => {
@@ -194,7 +209,7 @@ export function createEventHandlers(context: EventHandlerContext) {
       }
     }
     noteSessionRun(evt.runId);
-    if (!state.activeChatRunId) {
+    if (!state.activeChatRunId && !isLocalBtwRunId?.(evt.runId)) {
       state.activeChatRunId = evt.runId;
     }
     if (evt.state === "delta") {
@@ -206,7 +221,14 @@ export function createEventHandlers(context: EventHandlerContext) {
       setActivityStatus("streaming");
     }
     if (evt.state === "final") {
+      const isLocalBtwRun = isLocalBtwRunId?.(evt.runId) ?? false;
       const wasActiveRun = state.activeChatRunId === evt.runId;
+      if (!evt.message && isLocalBtwRun) {
+        forgetLocalBtwRunId?.(evt.runId);
+        noteFinalizedRun(evt.runId);
+        tui.requestRender();
+        return;
+      }
       if (!evt.message) {
         maybeRefreshHistoryForRun(evt.runId, {
           allowLocalWithoutDisplayableFinal: true,
@@ -254,12 +276,14 @@ export function createEventHandlers(context: EventHandlerContext) {
       });
     }
     if (evt.state === "aborted") {
+      forgetLocalBtwRunId?.(evt.runId);
       const wasActiveRun = state.activeChatRunId === evt.runId;
       chatLog.addSystem("run aborted");
       terminateRun({ runId: evt.runId, wasActiveRun, status: "aborted" });
       maybeRefreshHistoryForRun(evt.runId);
     }
     if (evt.state === "error") {
+      forgetLocalBtwRunId?.(evt.runId);
       const wasActiveRun = state.activeChatRunId === evt.runId;
       chatLog.addSystem(`run error: ${evt.errorMessage ?? "unknown"}`);
       terminateRun({ runId: evt.runId, wasActiveRun, status: "error" });
@@ -335,5 +359,30 @@ export function createEventHandlers(context: EventHandlerContext) {
     }
   };
 
-  return { handleChatEvent, handleAgentEvent };
+  const handleBtwEvent = (payload: unknown) => {
+    if (!payload || typeof payload !== "object") {
+      return;
+    }
+    const evt = payload as BtwEvent;
+    syncSessionKey();
+    if (!isSameSessionKey(evt.sessionKey, state.currentSessionKey)) {
+      return;
+    }
+    if (evt.kind !== "btw") {
+      return;
+    }
+    const question = evt.question.trim();
+    const text = evt.text.trim();
+    if (!question || !text) {
+      return;
+    }
+    btw.showResult({
+      question,
+      text,
+      isError: evt.isError,
+    });
+    tui.requestRender();
+  };
+
+  return { handleChatEvent, handleAgentEvent, handleBtwEvent };
 }

src/tui/tui-session-actions.test.ts

@@ -4,6 +4,11 @@ import { createSessionActions } from "./tui-session-actions.js";
 import type { TuiStateAccess } from "./tui-types.js";
 
 describe("tui session actions", () => {
+  const createBtwPresenter = () => ({
+    clear: vi.fn(),
+    showResult: vi.fn(),
+  });
+
   it("queues session refreshes and applies the latest result", async () => {
     let resolveFirst: ((value: unknown) => void) | undefined;
     let resolveSecond: ((value: unknown) => void) | undefined;
@@ -52,6 +57,7 @@ describe("tui session actions", () => {
     const { refreshSessionInfo } = createSessionActions({
       client: { listSessions } as unknown as GatewayChatClient,
       chatLog: { addSystem: vi.fn() } as unknown as import("./components/chat-log.js").ChatLog,
+      btw: createBtwPresenter(),
       tui: { requestRender } as unknown as import("@mariozechner/pi-tui").TUI,
       opts: {},
       state,
@@ -157,6 +163,7 @@ describe("tui session actions", () => {
     const { applySessionInfoFromPatch, refreshSessionInfo } = createSessionActions({
       client: { listSessions } as unknown as GatewayChatClient,
       chatLog: { addSystem: vi.fn() } as unknown as import("./components/chat-log.js").ChatLog,
+      btw: createBtwPresenter(),
       tui: { requestRender: vi.fn() } as unknown as import("@mariozechner/pi-tui").TUI,
       opts: {},
       state,
@@ -211,6 +218,7 @@ describe("tui session actions", () => {
       sessionId: "session-2",
       messages: [],
     });
+    const btw = createBtwPresenter();
 
     const state: TuiStateAccess = {
       agentDefaultId: "main",
@@ -247,6 +255,7 @@ describe("tui session actions", () => {
         addSystem: vi.fn(),
         clearAll: vi.fn(),
       } as unknown as import("./components/chat-log.js").ChatLog,
+      btw,
       tui: { requestRender: vi.fn() } as unknown as import("@mariozechner/pi-tui").TUI,
       opts: {},
       state,
@@ -270,5 +279,6 @@ describe("tui session actions", () => {
     expect(state.sessionInfo.model).toBe("session-model");
     expect(state.sessionInfo.modelProvider).toBe("openai");
     expect(state.sessionInfo.updatedAt).toBe(50);
+    expect(btw.clear).toHaveBeenCalled();
   });
 });

src/tui/tui-session-actions.ts

@@ -10,9 +10,14 @@ import type { GatewayAgentsList, GatewayChatClient } from "./gateway-chat.js";
 import { asString, extractTextFromMessage, isCommandMessage } from "./tui-formatters.js";
 import type { SessionInfo, TuiOptions, TuiStateAccess } from "./tui-types.js";
 
+type SessionActionBtwPresenter = {
+  clear: () => void;
+};
+
 type SessionActionContext = {
   client: GatewayChatClient;
   chatLog: ChatLog;
+  btw: SessionActionBtwPresenter;
   tui: TUI;
   opts: TuiOptions;
   state: TuiStateAccess;
@@ -42,6 +47,7 @@ export function createSessionActions(context: SessionActionContext) {
   const {
     client,
     chatLog,
+    btw,
     tui,
     opts,
     state,
@@ -298,6 +304,7 @@ export function createSessionActions(context: SessionActionContext) {
       state.sessionInfo.verboseLevel = record.verboseLevel ?? state.sessionInfo.verboseLevel;
       const showTools = (state.sessionInfo.verboseLevel ?? "off") !== "off";
       chatLog.clearAll();
+      btw.clear();
       chatLog.addSystem(`session ${state.currentSessionKey}`);
       for (const entry of record.messages ?? []) {
         if (!entry || typeof entry !== "object") {
@@ -367,6 +374,7 @@ export function createSessionActions(context: SessionActionContext) {
     state.sessionInfo.updatedAt = null;
     state.historyLoaded = false;
     clearLocalRunIds?.();
+    btw.clear();
     updateHeader();
     updateFooter();
     await loadHistory();

src/tui/tui-types.ts

@@ -18,6 +18,17 @@ export type ChatEvent = {
   errorMessage?: string;
 };
 
+export type BtwEvent = {
+  kind: "btw";
+  runId?: string;
+  sessionKey?: string;
+  question: string;
+  text: string;
+  isError?: boolean;
+  seq?: number;
+  ts?: number;
+};
+
 export type AgentEvent = {
   runId: string;
   stream: string;

src/tui/tui.ts

@@ -344,6 +344,7 @@ export async function runTui(opts: TuiOptions) {
   let showThinking = false;
   let pairingHintShown = false;
   const localRunIds = new Set<string>();
+  const localBtwRunIds = new Set<string>();
 
   const deliverDefault = opts.deliver ?? false;
   const autoMessage = opts.message?.trim();
@@ -498,6 +499,29 @@ export async function runTui(opts: TuiOptions) {
     localRunIds.clear();
   };
 
+  const noteLocalBtwRunId = (runId: string) => {
+    if (!runId) {
+      return;
+    }
+    localBtwRunIds.add(runId);
+    if (localBtwRunIds.size > 200) {
+      const [first] = localBtwRunIds;
+      if (first) {
+        localBtwRunIds.delete(first);
+      }
+    }
+  };
+
+  const forgetLocalBtwRunId = (runId: string) => {
+    localBtwRunIds.delete(runId);
+  };
+
+  const isLocalBtwRunId = (runId: string) => localBtwRunIds.has(runId);
+
+  const clearLocalBtwRunIds = () => {
+    localBtwRunIds.clear();
+  };
+
   const client = await GatewayChatClient.connect({
     url: opts.url,
     token: opts.token,
@@ -771,6 +795,14 @@ export async function runTui(opts: TuiOptions) {
   };
 
   const { openOverlay, closeOverlay } = createOverlayHandlers(tui, editor);
+  const btw = {
+    showResult: (params: { question: string; text: string; isError?: boolean }) => {
+      chatLog.showBtw(params);
+    },
+    clear: () => {
+      chatLog.dismissBtw();
+    },
+  };
 
   const initialSessionAgentId = (() => {
     if (!initialSessionInput) {
@@ -783,6 +815,7 @@ export async function runTui(opts: TuiOptions) {
   const sessionActions = createSessionActions({
     client,
     chatLog,
+    btw,
     tui,
     opts,
     state,
@@ -805,8 +838,9 @@ export async function runTui(opts: TuiOptions) {
     abortActive,
   } = sessionActions;
 
-  const { handleChatEvent, handleAgentEvent } = createEventHandlers({
+  const { handleChatEvent, handleAgentEvent, handleBtwEvent } = createEventHandlers({
     chatLog,
+    btw,
     tui,
     state,
     setActivityStatus,
@@ -815,6 +849,9 @@ export async function runTui(opts: TuiOptions) {
     isLocalRunId,
     forgetLocalRunId,
     clearLocalRunIds,
+    isLocalBtwRunId,
+    forgetLocalBtwRunId,
+    clearLocalBtwRunIds,
   });
 
   const requestExit = () => {
@@ -846,7 +883,9 @@ export async function runTui(opts: TuiOptions) {
       setActivityStatus,
       formatSessionKey,
       noteLocalRunId,
+      noteLocalBtwRunId,
       forgetLocalRunId,
+      forgetLocalBtwRunId,
       requestExit,
     });
 
@@ -869,6 +908,11 @@ export async function runTui(opts: TuiOptions) {
   });
 
   editor.onEscape = () => {
+    if (chatLog.hasVisibleBtw()) {
+      chatLog.dismissBtw();
+      tui.requestRender();
+      return;
+    }
     void abortActive();
   };
   const handleCtrlC = () => {
@@ -918,10 +962,28 @@ export async function runTui(opts: TuiOptions) {
     void loadHistory();
   };
 
+  tui.addInputListener((data) => {
+    if (!chatLog.hasVisibleBtw()) {
+      return undefined;
+    }
+    if (editor.getText().length > 0) {
+      return undefined;
+    }
+    if (matchesKey(data, "enter")) {
+      chatLog.dismissBtw();
+      tui.requestRender();
+      return { consume: true };
+    }
+    return undefined;
+  });
+
   client.onEvent = (evt) => {
     if (evt.event === "chat") {
       handleChatEvent(evt.payload);
     }
+    if (evt.event === "chat.side_result") {
+      handleBtwEvent(evt.payload);
+    }
     if (evt.event === "agent") {
       handleAgentEvent(evt.payload);
     }