feat(webui): add localized slash commands

Add a session-scoped slash command palette sourced from backend command metadata, and keep welcome-page quick actions localized across all WebUI languages.

Co-authored-by: Cursor <cursoragent@cursor.com>

nanobot/channels/websocket.py

@@ -32,6 +32,7 @@ from websockets.http11 import Response
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.base import BaseChannel
+from nanobot.command.builtin import builtin_command_palette
 from nanobot.config.paths import get_media_dir
 from nanobot.config.schema import Base
 from nanobot.utils.helpers import safe_filename
@@ -553,6 +554,9 @@ class WebSocketChannel(BaseChannel):
         if got == "/api/settings":
             return self._handle_settings(request)
 
+        if got == "/api/commands":
+            return self._handle_commands(request)
+
         if got == "/api/settings/update":
             return self._handle_settings_update(request)
 
@@ -708,6 +712,11 @@ class WebSocketChannel(BaseChannel):
             return _http_error(401, "Unauthorized")
         return _http_json_response(self._settings_payload())
 
+    def _handle_commands(self, request: WsRequest) -> Response:
+        if not self._check_api_token(request):
+            return _http_error(401, "Unauthorized")
+        return _http_json_response({"commands": builtin_command_palette()})
+
     def _handle_settings_update(self, request: WsRequest) -> Response:
         if not self._check_api_token(request):
             return _http_error(401, "Unauthorized")

nanobot/command/builtin.py

@@ -6,6 +6,7 @@ import asyncio
 import os
 import sys
 from contextlib import suppress
+from dataclasses import dataclass
 
 from nanobot import __version__
 from nanobot.bus.events import OutboundMessage
@@ -14,6 +15,88 @@ from nanobot.utils.helpers import build_status_content
 from nanobot.utils.restart import set_restart_notice_to_env
 
 
+@dataclass(frozen=True)
+class BuiltinCommandSpec:
+    command: str
+    title: str
+    description: str
+    icon: str
+    arg_hint: str = ""
+
+    def as_dict(self) -> dict[str, str]:
+        return {
+            "command": self.command,
+            "title": self.title,
+            "description": self.description,
+            "icon": self.icon,
+            "arg_hint": self.arg_hint,
+        }
+
+
+BUILTIN_COMMAND_SPECS: tuple[BuiltinCommandSpec, ...] = (
+    BuiltinCommandSpec(
+        "/new",
+        "New chat",
+        "Stop the current task and start a fresh conversation.",
+        "square-pen",
+    ),
+    BuiltinCommandSpec(
+        "/stop",
+        "Stop current task",
+        "Cancel the active agent turn for this chat.",
+        "square",
+    ),
+    BuiltinCommandSpec(
+        "/restart",
+        "Restart nanobot",
+        "Restart the bot process in place.",
+        "rotate-cw",
+    ),
+    BuiltinCommandSpec(
+        "/status",
+        "Show status",
+        "Display runtime, provider, and channel status.",
+        "activity",
+    ),
+    BuiltinCommandSpec(
+        "/history",
+        "Show conversation history",
+        "Print the last N persisted conversation messages.",
+        "history",
+        "[n]",
+    ),
+    BuiltinCommandSpec(
+        "/dream",
+        "Run Dream",
+        "Manually trigger memory consolidation.",
+        "sparkles",
+    ),
+    BuiltinCommandSpec(
+        "/dream-log",
+        "Show Dream log",
+        "Show what the last Dream consolidation changed.",
+        "book-open",
+    ),
+    BuiltinCommandSpec(
+        "/dream-restore",
+        "Restore memory",
+        "Revert memory to a previous Dream snapshot.",
+        "undo-2",
+    ),
+    BuiltinCommandSpec(
+        "/help",
+        "Show help",
+        "List available slash commands.",
+        "circle-help",
+    ),
+)
+
+
+def builtin_command_palette() -> list[dict[str, str]]:
+    """Return structured command metadata for UI command palettes."""
+    return [spec.as_dict() for spec in BUILTIN_COMMAND_SPECS]
+
+
 async def cmd_stop(ctx: CommandContext) -> OutboundMessage:
     """Cancel all active tasks and subagents for the session."""
     loop = ctx.loop
@@ -378,18 +461,12 @@ async def cmd_help(ctx: CommandContext) -> OutboundMessage:
 
 def build_help_text() -> str:
     """Build canonical help text shared across channels."""
-    lines = [
-        "🐈 nanobot commands:",
-        "/new — Stop current task and start a new conversation",
-        "/stop — Stop the current task",
-        "/restart — Restart the bot",
-        "/status — Show bot status",
-        "/history [n] — Show the last N conversation messages (default 10)",
-        "/dream — Manually trigger Dream consolidation",
-        "/dream-log — Show what the last Dream changed",
-        "/dream-restore — Revert memory to a previous state",
-        "/help — Show available commands",
-    ]
+    lines = ["🐈 nanobot commands:"]
+    for spec in BUILTIN_COMMAND_SPECS:
+        command = spec.command
+        if spec.arg_hint:
+            command = f"{command} {spec.arg_hint}"
+        lines.append(f"{command} — {spec.description}")
     return "\n".join(lines)
 
 

tests/channels/test_websocket_channel.py

@@ -563,6 +563,34 @@ async def test_settings_api_returns_safe_subset_and_updates_whitelist(
         await server_task
 
 
+@pytest.mark.asyncio
+async def test_commands_api_returns_slash_command_metadata(bus: MagicMock) -> None:
+    port = 29892
+    channel = _ch(bus, port=port)
+    channel._api_tokens["tok"] = time.monotonic() + 300
+
+    server_task = asyncio.create_task(channel.start())
+    await asyncio.sleep(0.3)
+
+    try:
+        denied = await _http_get(f"http://127.0.0.1:{port}/api/commands")
+        assert denied.status_code == 401
+
+        response = await _http_get(
+            f"http://127.0.0.1:{port}/api/commands",
+            headers={"Authorization": "Bearer tok"},
+        )
+        assert response.status_code == 200
+        body = response.json()
+        commands = {row["command"]: row for row in body["commands"]}
+        assert commands["/stop"]["title"] == "Stop current task"
+        assert commands["/history"]["arg_hint"] == "[n]"
+        assert all("description" in row for row in body["commands"])
+    finally:
+        await channel.stop()
+        await server_task
+
+
 def test_settings_payload_normalizes_camel_case_provider(
     bus: MagicMock,
     monkeypatch,

webui/src/components/thread/ThreadComposer.tsx

@@ -7,11 +7,21 @@ import {
   type KeyboardEvent as ReactKeyboardEvent,
 } from "react";
 import {
+  Activity,
   ArrowUp,
+  BookOpen,
+  CircleHelp,
+  History,
   ImageIcon,
   Loader2,
   Plus,
+  RotateCw,
+  Sparkles,
+  Square,
+  SquarePen,
+  Undo2,
   X,
+  type LucideIcon,
 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 
@@ -24,6 +34,7 @@ import {
 } from "@/hooks/useAttachedImages";
 import { useClipboardAndDrop } from "@/hooks/useClipboardAndDrop";
 import type { SendImage } from "@/hooks/useNanobotStream";
+import type { SlashCommand } from "@/lib/types";
 import { cn } from "@/lib/utils";
 
 /** ``<input accept>``: aligned with the server's MIME whitelist. SVG is
@@ -43,6 +54,23 @@ interface ThreadComposerProps {
   isStreaming?: boolean;
   modelLabel?: string | null;
   variant?: "thread" | "hero";
+  slashCommands?: SlashCommand[];
+}
+
+const COMMAND_ICONS: Record<string, LucideIcon> = {
+  activity: Activity,
+  "book-open": BookOpen,
+  "circle-help": CircleHelp,
+  history: History,
+  "rotate-cw": RotateCw,
+  sparkles: Sparkles,
+  square: Square,
+  "square-pen": SquarePen,
+  "undo-2": Undo2,
+};
+
+function slashCommandI18nKey(command: string): string {
+  return command.replace(/^\//, "").replace(/-/g, "_");
 }
 
 export function ThreadComposer({
@@ -52,10 +80,13 @@ export function ThreadComposer({
   isStreaming = false,
   modelLabel = null,
   variant = "thread",
+  slashCommands = [],
 }: ThreadComposerProps) {
   const { t } = useTranslation();
   const [value, setValue] = useState("");
   const [inlineError, setInlineError] = useState<string | null>(null);
+  const [slashMenuDismissed, setSlashMenuDismissed] = useState(false);
+  const [selectedCommandIndex, setSelectedCommandIndex] = useState(0);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const chipRefs = useRef(new Map<string, HTMLButtonElement>());
@@ -119,6 +150,66 @@ export function ThreadComposer({
     && !hasErrors
     && (value.trim().length > 0 || readyImages.length > 0);
 
+  const slashQuery = useMemo(() => {
+    if (disabled || slashMenuDismissed || !value.startsWith("/")) return null;
+    const commandToken = value.slice(1);
+    if (/\s/.test(commandToken)) return null;
+    return commandToken.toLowerCase();
+  }, [disabled, slashMenuDismissed, value]);
+
+  const filteredSlashCommands = useMemo(() => {
+    if (slashQuery === null) return [];
+    return slashCommands
+      .filter((command) => {
+        const haystack = [
+          command.command,
+          command.title,
+          command.description,
+          command.argHint ?? "",
+          t(`thread.composer.slash.commands.${slashCommandI18nKey(command.command)}.title`, {
+            defaultValue: "",
+          }),
+          t(`thread.composer.slash.commands.${slashCommandI18nKey(command.command)}.description`, {
+            defaultValue: "",
+          }),
+        ].join(" ").toLowerCase();
+        return haystack.includes(slashQuery);
+      })
+      .slice(0, 8);
+  }, [slashCommands, slashQuery, t]);
+
+  const showSlashMenu = filteredSlashCommands.length > 0;
+
+  useEffect(() => {
+    setSelectedCommandIndex(0);
+  }, [slashQuery]);
+
+  useEffect(() => {
+    if (selectedCommandIndex >= filteredSlashCommands.length) {
+      setSelectedCommandIndex(0);
+    }
+  }, [filteredSlashCommands.length, selectedCommandIndex]);
+
+  const resizeTextarea = useCallback(() => {
+    requestAnimationFrame(() => {
+      const el = textareaRef.current;
+      if (!el) return;
+      el.style.height = "auto";
+      el.style.height = `${Math.min(el.scrollHeight, 260)}px`;
+      el.focus();
+    });
+  }, []);
+
+  const chooseSlashCommand = useCallback(
+    (command: SlashCommand) => {
+      setValue(command.argHint ? `${command.command} ` : command.command);
+      setSlashMenuDismissed(true);
+      setInlineError(null);
+      resizeTextarea();
+    },
+    [resizeTextarea],
+  );
+
   const submit = useCallback(() => {
     if (!canSend) return;
     const trimmed = value.trim();
@@ -142,16 +233,35 @@ export function ThreadComposer({
     // Bubble owns the data URL copy; safe to revoke every staged blob
     // preview here without affecting the rendered message.
     clear();
-    requestAnimationFrame(() => {
-      const el = textareaRef.current;
-      if (el) {
-        el.style.height = "auto";
-        el.focus();
-      }
-    });
-  }, [canSend, clear, onSend, readyImages, value]);
+    setSlashMenuDismissed(false);
+    resizeTextarea();
+  }, [canSend, clear, onSend, readyImages, resizeTextarea, value]);
 
   const onKeyDown = (e: ReactKeyboardEvent<HTMLTextAreaElement>) => {
+    if (showSlashMenu) {
+      if (e.key === "ArrowDown") {
+        e.preventDefault();
+        setSelectedCommandIndex((idx) => (idx + 1) % filteredSlashCommands.length);
+        return;
+      }
+      if (e.key === "ArrowUp") {
+        e.preventDefault();
+        setSelectedCommandIndex(
+          (idx) => (idx - 1 + filteredSlashCommands.length) % filteredSlashCommands.length,
+        );
+        return;
+      }
+      if (e.key === "Tab" || (e.key === "Enter" && !e.shiftKey)) {
+        e.preventDefault();
+        chooseSlashCommand(filteredSlashCommands[selectedCommandIndex]);
+        return;
+      }
+      if (e.key === "Escape") {
+        e.preventDefault();
+        setSlashMenuDismissed(true);
+        return;
+      }
+    }
     if (e.key === "Enter" && !e.shiftKey && !e.nativeEvent.isComposing) {
       e.preventDefault();
       submit();
@@ -213,8 +323,17 @@ export function ThreadComposer({
       onDragOver={onDragOver}
       onDragLeave={onDragLeave}
       onDrop={onDrop}
-      className={cn("w-full", isHero ? "px-0" : "px-1 pb-1.5 pt-1 sm:px-0")}
+      className={cn("relative w-full", isHero ? "px-0" : "px-1 pb-1.5 pt-1 sm:px-0")}
     >
+      {showSlashMenu ? (
+        <SlashCommandPalette
+          commands={filteredSlashCommands}
+          selectedIndex={selectedCommandIndex}
+          isHero={isHero}
+          onHover={setSelectedCommandIndex}
+          onChoose={chooseSlashCommand}
+        />
+      ) : null}
       <div
         className={cn(
           "relative mx-auto flex w-full flex-col overflow-hidden transition-all duration-200",
@@ -257,7 +376,10 @@ export function ThreadComposer({
         <textarea
           ref={textareaRef}
           value={value}
-          onChange={(e) => setValue(e.target.value)}
+          onChange={(e) => {
+            setValue(e.target.value);
+            setSlashMenuDismissed(false);
+          }}
           onInput={onInput}
           onKeyDown={onKeyDown}
           onPaste={onPaste}
@@ -367,6 +489,106 @@ export function ThreadComposer({
   );
 }
 
+interface SlashCommandPaletteProps {
+  commands: SlashCommand[];
+  selectedIndex: number;
+  isHero: boolean;
+  onHover: (index: number) => void;
+  onChoose: (command: SlashCommand) => void;
+}
+
+function SlashCommandPalette({
+  commands,
+  selectedIndex,
+  isHero,
+  onHover,
+  onChoose,
+}: SlashCommandPaletteProps) {
+  const { t } = useTranslation();
+  return (
+    <div
+      role="listbox"
+      aria-label={t("thread.composer.slash.ariaLabel")}
+      className={cn(
+        "absolute bottom-full left-1/2 z-30 mb-2 max-h-[22rem] w-[calc(100%-0.5rem)] -translate-x-1/2 overflow-hidden rounded-[18px] border",
+        "border-border/65 bg-popover/98 p-1.5 text-popover-foreground shadow-[0_18px_55px_rgba(15,23,42,0.18)] backdrop-blur",
+        "dark:border-white/10 dark:shadow-[0_22px_55px_rgba(0,0,0,0.45)]",
+        isHero ? "max-w-[58rem]" : "max-w-[49.5rem]",
+      )}
+    >
+      <div className="px-2 pb-1 pt-1 text-[11px] font-medium tracking-[0.08em] text-muted-foreground/70">
+        {t("thread.composer.slash.label")}
+      </div>
+      <div className="max-h-[18rem] overflow-y-auto pr-0.5">
+        {commands.map((command, index) => {
+          const Icon = COMMAND_ICONS[command.icon] ?? CircleHelp;
+          const selected = index === selectedIndex;
+          const commandKey = slashCommandI18nKey(command.command);
+          const title = t(`thread.composer.slash.commands.${commandKey}.title`, {
+            defaultValue: command.title,
+          });
+          const description = t(`thread.composer.slash.commands.${commandKey}.description`, {
+            defaultValue: command.description,
+          });
+          return (
+            <button
+              key={command.command}
+              type="button"
+              role="option"
+              aria-selected={selected}
+              onMouseEnter={() => onHover(index)}
+              onMouseDown={(e) => {
+                e.preventDefault();
+                onChoose(command);
+              }}
+              className={cn(
+                "flex w-full items-center gap-3 rounded-[13px] px-3 py-2.5 text-left transition-colors",
+                selected
+                  ? "bg-primary/10 text-foreground"
+                  : "text-foreground/86 hover:bg-accent/55",
+              )}
+            >
+              <span
+                className={cn(
+                  "flex h-8 w-8 shrink-0 items-center justify-center rounded-[10px] border",
+                  selected
+                    ? "border-primary/25 bg-primary/12 text-primary"
+                    : "border-border/65 bg-muted/45 text-muted-foreground",
+                )}
+              >
+                <Icon className="h-4 w-4" />
+              </span>
+              <span className="min-w-0 flex-1">
+                <span className="flex min-w-0 items-baseline gap-2">
+                  <span className="font-mono text-[13px] font-semibold text-foreground">
+                    {command.command}
+                  </span>
+                  {command.argHint ? (
+                    <span className="font-mono text-[12px] text-muted-foreground">
+                      {command.argHint}
+                    </span>
+                  ) : null}
+                  <span className="truncate text-[13px] font-medium">
+                    {title}
+                  </span>
+                </span>
+                <span className="mt-0.5 block truncate text-[12px] text-muted-foreground">
+                  {description}
+                </span>
+              </span>
+            </button>
+          );
+        })}
+      </div>
+      <div className="flex items-center gap-2 px-2 pt-1.5 text-[10.5px] text-muted-foreground/70">
+        <span>{t("thread.composer.slash.navigateHint")}</span>
+        <span>{t("thread.composer.slash.selectHint")}</span>
+        <span>{t("thread.composer.slash.closeHint")}</span>
+      </div>
+    </div>
+  );
+}
+
 interface AttachmentChipProps {
   image: AttachedImage;
   labelRemove: string;

webui/src/components/thread/ThreadShell.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from "react";
 import {
   BarChart3,
   BookOpen,
@@ -17,7 +17,8 @@ import { StreamErrorNotice } from "@/components/thread/StreamErrorNotice";
 import { ThreadViewport } from "@/components/thread/ThreadViewport";
 import { useNanobotStream } from "@/hooks/useNanobotStream";
 import { useSessionHistory } from "@/hooks/useSessions";
-import type { ChatSummary, UIMessage } from "@/lib/types";
+import { listSlashCommands } from "@/lib/api";
+import type { ChatSummary, SlashCommand, UIMessage } from "@/lib/types";
 import { useClient } from "@/providers/ClientProvider";
 
 interface ThreadShellProps {
@@ -66,8 +67,9 @@ export function ThreadShell({
   const chatId = session?.chatId ?? null;
   const historyKey = session?.key ?? null;
   const { messages: historical, loading, hasPendingToolCalls } = useSessionHistory(historyKey);
-  const { client, modelName } = useClient();
+  const { client, modelName, token } = useClient();
   const [booting, setBooting] = useState(false);
+  const [slashCommands, setSlashCommands] = useState<SlashCommand[]>([]);
   const pendingFirstRef = useRef<string | null>(null);
   const messageCacheRef = useRef<Map<string, UIMessage[]>>(new Map());
   const lastCachedChatIdRef = useRef<string | null>(null);
@@ -116,17 +118,24 @@ export function ThreadShell({
     setMessages(historical);
   }, [chatId, historical, setMessages]);
 
-  useEffect(() => {
-    if (!chatId) return;
+  useLayoutEffect(() => {
+    if (!chatId) {
+      lastCachedChatIdRef.current = null;
+      return;
+    }
+    if (loading) return;
     // Skip the first cache write after a chat switch. During that render,
     // `messages` can still belong to the previous chat until the stream hook
     // resets its local state for the new session.
     if (lastCachedChatIdRef.current !== chatId) {
       lastCachedChatIdRef.current = chatId;
+      if (messages.length > 0) {
+        messageCacheRef.current.set(chatId, messages);
+      }
       return;
     }
     messageCacheRef.current.set(chatId, messages);
-  }, [chatId, messages]);
+  }, [chatId, loading, messages]);
 
   useEffect(() => {
     if (!chatId) return;
@@ -146,6 +155,21 @@ export function ThreadShell({
     setBooting(false);
   }, [chatId, client, setMessages]);
 
+  useEffect(() => {
+    let cancelled = false;
+    (async () => {
+      try {
+        const commands = await listSlashCommands(token);
+        if (!cancelled) setSlashCommands(commands);
+      } catch {
+        if (!cancelled) setSlashCommands([]);
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [token]);
+
   const handleWelcomeSend = useCallback(
     async (content: string) => {
       if (booting) return;
@@ -222,6 +246,7 @@ export function ThreadShell({
           }
           modelLabel={toModelBadgeLabel(modelName)}
           variant={showHeroComposer ? "hero" : "thread"}
+          slashCommands={slashCommands}
         />
       ) : (
         <ThreadComposer

webui/src/i18n/locales/en/common.json

@@ -127,6 +127,51 @@
         "deepResearch": "Deep research",
         "voice": "Voice input"
       },
+      "slash": {
+        "ariaLabel": "Slash commands",
+        "label": "commands",
+        "navigateHint": "↑↓ Navigate",
+        "selectHint": "Enter/Tab Select",
+        "closeHint": "Esc Close",
+        "commands": {
+          "new": {
+            "title": "New chat",
+            "description": "Stop the current task and start a fresh conversation."
+          },
+          "stop": {
+            "title": "Stop current task",
+            "description": "Cancel the active agent turn for this chat."
+          },
+          "restart": {
+            "title": "Restart nanobot",
+            "description": "Restart the bot process in place."
+          },
+          "status": {
+            "title": "Show status",
+            "description": "Display runtime, provider, and channel status."
+          },
+          "history": {
+            "title": "Show conversation history",
+            "description": "Print the last N persisted conversation messages."
+          },
+          "dream": {
+            "title": "Run Dream",
+            "description": "Manually trigger memory consolidation."
+          },
+          "dream_log": {
+            "title": "Show Dream log",
+            "description": "Show what the last Dream consolidation changed."
+          },
+          "dream_restore": {
+            "title": "Restore memory",
+            "description": "Revert memory to a previous Dream snapshot."
+          },
+          "help": {
+            "title": "Show help",
+            "description": "List available slash commands."
+          }
+        }
+      },
       "encoding": "Encoding…",
       "remove": "Remove attachment",
       "normalizedSizeHint": "{{orig}} → {{current}} (auto)",

webui/src/i18n/locales/es/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "Cargando conversación…",
     "empty": {
-      "description": "Haz preguntas, continúa tu trabajo local o inicia un nuevo hilo."
+      "description": "Haz preguntas, continúa tu trabajo local o inicia un nuevo hilo.",
+      "greeting": "¿Qué puedo hacer por ti?",
+      "quickActions": {
+        "plan": {
+          "title": "Crear un plan de proyecto",
+          "prompt": "Crea un plan de proyecto conciso para lo que debería construir después."
+        },
+        "analyze": {
+          "title": "Analizar estos datos",
+          "prompt": "Ayúdame a analizar estos datos y destaca los patrones más importantes."
+        },
+        "brainstorm": {
+          "title": "Lluvia de ideas",
+          "prompt": "Propón algunas ideas prácticas y sus compensaciones para este problema."
+        },
+        "code": {
+          "title": "Escribir código",
+          "prompt": "Ayúdame a escribir el código para esta tarea, empezando por el cambio útil más pequeño."
+        },
+        "summarize": {
+          "title": "Resumir este documento",
+          "prompt": "Resume este documento y enumera las conclusiones clave."
+        },
+        "more": {
+          "title": "Más",
+          "prompt": "Muéstrame algunas formas útiles en las que puedes ayudar en este workspace."
+        }
+      }
     },
     "header": {
       "toggleSidebar": "Mostrar u ocultar la barra lateral"
@@ -77,6 +104,51 @@
         "decode_failed": "No se pudo decodificar esta imagen",
         "too_large": "Imagen demasiado grande — prueba una más pequeña",
         "io": "No se pudo leer este archivo"
+      },
+      "slash": {
+        "ariaLabel": "Comandos slash",
+        "label": "comandos",
+        "navigateHint": "↑↓ Navegar",
+        "selectHint": "Enter/Tab Insertar",
+        "closeHint": "Esc Cerrar",
+        "commands": {
+          "new": {
+            "title": "Nuevo chat",
+            "description": "Detiene la tarea actual e inicia una conversación nueva."
+          },
+          "stop": {
+            "title": "Detener tarea actual",
+            "description": "Cancela el turno activo del agent en este chat."
+          },
+          "restart": {
+            "title": "Reiniciar nanobot",
+            "description": "Reinicia el proceso del bot en el mismo lugar."
+          },
+          "status": {
+            "title": "Mostrar estado",
+            "description": "Muestra el estado del runtime, provider y channels."
+          },
+          "history": {
+            "title": "Mostrar historial",
+            "description": "Imprime los últimos N mensajes persistidos de la conversación."
+          },
+          "dream": {
+            "title": "Ejecutar Dream",
+            "description": "Activa manualmente la consolidación de memoria."
+          },
+          "dream_log": {
+            "title": "Mostrar registro de Dream",
+            "description": "Muestra qué cambió la última consolidación Dream."
+          },
+          "dream_restore": {
+            "title": "Restaurar memoria",
+            "description": "Revierte la memoria a una instantánea Dream anterior."
+          },
+          "help": {
+            "title": "Mostrar ayuda",
+            "description": "Lista los comandos slash disponibles."
+          }
+        }
       }
     },
     "scrollToBottom": "Desplazarse al final"

webui/src/i18n/locales/fr/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "Chargement de la conversation…",
     "empty": {
-      "description": "Posez des questions, poursuivez votre travail local ou démarrez un nouveau fil."
+      "description": "Posez des questions, poursuivez votre travail local ou démarrez un nouveau fil.",
+      "greeting": "Que puis-je faire pour vous ?",
+      "quickActions": {
+        "plan": {
+          "title": "Créer un plan de projet",
+          "prompt": "Créez un plan de projet concis pour ce que je devrais construire ensuite."
+        },
+        "analyze": {
+          "title": "Analyser ces données",
+          "prompt": "Aidez-moi à analyser ces données et à faire ressortir les tendances les plus importantes."
+        },
+        "brainstorm": {
+          "title": "Trouver des idées",
+          "prompt": "Proposez quelques idées pratiques et leurs compromis pour ce problème."
+        },
+        "code": {
+          "title": "Écrire du code",
+          "prompt": "Aidez-moi à écrire le code pour cette tâche, en commençant par le plus petit changement utile."
+        },
+        "summarize": {
+          "title": "Résumer ce document",
+          "prompt": "Résumez ce document et listez les points clés à retenir."
+        },
+        "more": {
+          "title": "Plus",
+          "prompt": "Montrez-moi quelques façons utiles dont vous pouvez m’aider dans cet espace de travail."
+        }
+      }
     },
     "header": {
       "toggleSidebar": "Afficher ou masquer la barre latérale"
@@ -77,6 +104,51 @@
         "decode_failed": "Impossible de décoder cette image",
         "too_large": "Image trop grande — essayez-en une plus petite",
         "io": "Impossible de lire ce fichier"
+      },
+      "slash": {
+        "ariaLabel": "Commandes slash",
+        "label": "commandes",
+        "navigateHint": "↑↓ Naviguer",
+        "selectHint": "Entrée/Tab Insérer",
+        "closeHint": "Échap Fermer",
+        "commands": {
+          "new": {
+            "title": "Nouvelle discussion",
+            "description": "Arrêter la tâche en cours et démarrer une nouvelle conversation."
+          },
+          "stop": {
+            "title": "Arrêter la tâche en cours",
+            "description": "Annuler le tour agent actif pour cette discussion."
+          },
+          "restart": {
+            "title": "Redémarrer nanobot",
+            "description": "Redémarrer le processus du bot sur place."
+          },
+          "status": {
+            "title": "Afficher l’état",
+            "description": "Afficher l’état du runtime, du provider et des channels."
+          },
+          "history": {
+            "title": "Afficher l’historique",
+            "description": "Afficher les N derniers messages persistés de la conversation."
+          },
+          "dream": {
+            "title": "Lancer Dream",
+            "description": "Déclencher manuellement la consolidation de la mémoire."
+          },
+          "dream_log": {
+            "title": "Afficher le journal Dream",
+            "description": "Afficher ce que la dernière consolidation Dream a changé."
+          },
+          "dream_restore": {
+            "title": "Restaurer la mémoire",
+            "description": "Revenir à un instantané Dream précédent."
+          },
+          "help": {
+            "title": "Afficher l’aide",
+            "description": "Lister les commandes slash disponibles."
+          }
+        }
       }
     },
     "scrollToBottom": "Faire défiler vers le bas"

webui/src/i18n/locales/id/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "Memuat percakapan…",
     "empty": {
-      "description": "Ajukan pertanyaan, lanjutkan pekerjaan lokal, atau mulai thread baru."
+      "description": "Ajukan pertanyaan, lanjutkan pekerjaan lokal, atau mulai thread baru.",
+      "greeting": "Apa yang bisa saya bantu?",
+      "quickActions": {
+        "plan": {
+          "title": "Buat rencana proyek",
+          "prompt": "Buat rencana proyek ringkas untuk apa yang sebaiknya saya bangun berikutnya."
+        },
+        "analyze": {
+          "title": "Analisis data ini",
+          "prompt": "Bantu saya menganalisis data ini dan soroti pola yang paling penting."
+        },
+        "brainstorm": {
+          "title": "Brainstorm ide",
+          "prompt": "Brainstorm beberapa ide praktis dan tradeoff untuk masalah ini."
+        },
+        "code": {
+          "title": "Tulis kode",
+          "prompt": "Bantu saya menulis kode untuk tugas ini, mulai dari perubahan berguna yang paling kecil."
+        },
+        "summarize": {
+          "title": "Ringkas dokumen ini",
+          "prompt": "Ringkas dokumen ini dan daftar poin-poin utamanya."
+        },
+        "more": {
+          "title": "Lainnya",
+          "prompt": "Tunjukkan beberapa cara berguna Anda dapat membantu di workspace ini."
+        }
+      }
     },
     "header": {
       "toggleSidebar": "Tampilkan atau sembunyikan sidebar"
@@ -77,6 +104,51 @@
         "decode_failed": "Tidak dapat mendekode gambar ini",
         "too_large": "Gambar terlalu besar — coba yang lebih kecil",
         "io": "Tidak dapat membaca file ini"
+      },
+      "slash": {
+        "ariaLabel": "Perintah slash",
+        "label": "perintah",
+        "navigateHint": "↑↓ Pilih",
+        "selectHint": "Enter/Tab Sisipkan",
+        "closeHint": "Esc Tutup",
+        "commands": {
+          "new": {
+            "title": "Obrolan baru",
+            "description": "Hentikan tugas saat ini dan mulai percakapan baru."
+          },
+          "stop": {
+            "title": "Hentikan tugas saat ini",
+            "description": "Batalkan giliran agent yang sedang aktif di chat ini."
+          },
+          "restart": {
+            "title": "Mulai ulang nanobot",
+            "description": "Mulai ulang proses bot di tempat."
+          },
+          "status": {
+            "title": "Tampilkan status",
+            "description": "Tampilkan status runtime, provider, dan channel."
+          },
+          "history": {
+            "title": "Tampilkan riwayat",
+            "description": "Cetak N pesan percakapan tersimpan terbaru."
+          },
+          "dream": {
+            "title": "Jalankan Dream",
+            "description": "Picu konsolidasi memori secara manual."
+          },
+          "dream_log": {
+            "title": "Tampilkan log Dream",
+            "description": "Tampilkan perubahan dari konsolidasi Dream terakhir."
+          },
+          "dream_restore": {
+            "title": "Pulihkan memori",
+            "description": "Kembalikan memori ke snapshot Dream sebelumnya."
+          },
+          "help": {
+            "title": "Tampilkan bantuan",
+            "description": "Daftar perintah slash yang tersedia."
+          }
+        }
       }
     },
     "scrollToBottom": "Gulir ke bawah"

webui/src/i18n/locales/ja/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "会話を読み込み中…",
     "empty": {
-      "description": "質問したり、ローカル作業を続けたり、新しいスレッドを始めたりできます。"
+      "description": "質問したり、ローカル作業を続けたり、新しいスレッドを始めたりできます。",
+      "greeting": "何をお手伝いしましょうか？",
+      "quickActions": {
+        "plan": {
+          "title": "プロジェクト計画を作成",
+          "prompt": "次に作るものについて、簡潔なプロジェクト計画を作成してください。"
+        },
+        "analyze": {
+          "title": "このデータを分析",
+          "prompt": "このデータを分析し、最も重要なパターンを指摘してください。"
+        },
+        "brainstorm": {
+          "title": "アイデアを出す",
+          "prompt": "この問題について、実用的なアイデアとトレードオフをいくつか出してください。"
+        },
+        "code": {
+          "title": "コードを書く",
+          "prompt": "このタスクのコードを書くのを手伝ってください。まず最小限の有用な変更から始めてください。"
+        },
+        "summarize": {
+          "title": "この文書を要約",
+          "prompt": "この文書を要約し、重要なポイントを列挙してください。"
+        },
+        "more": {
+          "title": "その他",
+          "prompt": "このワークスペースであなたが手伝える便利な方法をいくつか見せてください。"
+        }
+      }
     },
     "header": {
       "toggleSidebar": "サイドバーを切り替える"
@@ -77,6 +104,51 @@
         "decode_failed": "この画像をデコードできません",
         "too_large": "画像が大きすぎます。小さいものを選んでください",
         "io": "このファイルを読み込めません"
+      },
+      "slash": {
+        "ariaLabel": "スラッシュコマンド",
+        "label": "コマンド",
+        "navigateHint": "↑↓ 選択",
+        "selectHint": "Enter/Tab 入力",
+        "closeHint": "Esc 閉じる",
+        "commands": {
+          "new": {
+            "title": "新しいチャット",
+            "description": "現在のタスクを停止して、新しい会話を開始します。"
+          },
+          "stop": {
+            "title": "現在のタスクを停止",
+            "description": "このチャットで実行中の agent ターンをキャンセルします。"
+          },
+          "restart": {
+            "title": "nanobot を再起動",
+            "description": "bot プロセスをその場で再起動します。"
+          },
+          "status": {
+            "title": "ステータスを表示",
+            "description": "ランタイム、provider、channel の状態を表示します。"
+          },
+          "history": {
+            "title": "会話履歴を表示",
+            "description": "保存済みの直近 N 件の会話メッセージを表示します。"
+          },
+          "dream": {
+            "title": "Dream を実行",
+            "description": "メモリ統合を手動で開始します。"
+          },
+          "dream_log": {
+            "title": "Dream ログを表示",
+            "description": "直近の Dream 統合で変更された内容を表示します。"
+          },
+          "dream_restore": {
+            "title": "メモリを復元",
+            "description": "以前の Dream スナップショットへメモリを戻します。"
+          },
+          "help": {
+            "title": "ヘルプを表示",
+            "description": "利用可能なスラッシュコマンドを一覧表示します。"
+          }
+        }
       }
     },
     "scrollToBottom": "一番下へスクロール"

webui/src/i18n/locales/ko/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "대화 불러오는 중…",
     "empty": {
-      "description": "질문을 하거나, 로컬 작업을 이어가거나, 새 스레드를 시작할 수 있습니다."
+      "description": "질문을 하거나, 로컬 작업을 이어가거나, 새 스레드를 시작할 수 있습니다.",
+      "greeting": "무엇을 도와드릴까요?",
+      "quickActions": {
+        "plan": {
+          "title": "프로젝트 계획 만들기",
+          "prompt": "다음에 만들 것에 대한 간결한 프로젝트 계획을 작성해 주세요."
+        },
+        "analyze": {
+          "title": "이 데이터 분석하기",
+          "prompt": "이 데이터를 분석하고 가장 중요한 패턴을 짚어 주세요."
+        },
+        "brainstorm": {
+          "title": "아이디어 브레인스토밍",
+          "prompt": "이 문제에 대한 실용적인 아이디어와 트레이드오프를 몇 가지 제안해 주세요."
+        },
+        "code": {
+          "title": "코드 작성하기",
+          "prompt": "이 작업을 위한 코드를 작성해 주세요. 가장 작은 유용한 변경부터 시작해 주세요."
+        },
+        "summarize": {
+          "title": "문서 요약하기",
+          "prompt": "이 문서를 요약하고 핵심 내용을 정리해 주세요."
+        },
+        "more": {
+          "title": "더 보기",
+          "prompt": "이 워크스페이스에서 도와줄 수 있는 유용한 방법을 몇 가지 보여 주세요."
+        }
+      }
     },
     "header": {
       "toggleSidebar": "사이드바 전환"
@@ -77,6 +104,51 @@
         "decode_failed": "이 이미지를 디코딩할 수 없습니다",
         "too_large": "이미지가 너무 큽니다. 더 작은 걸로 시도해 주세요",
         "io": "이 파일을 읽을 수 없습니다"
+      },
+      "slash": {
+        "ariaLabel": "슬래시 명령",
+        "label": "명령",
+        "navigateHint": "↑↓ 선택",
+        "selectHint": "Enter/Tab 입력",
+        "closeHint": "Esc 닫기",
+        "commands": {
+          "new": {
+            "title": "새 채팅",
+            "description": "현재 작업을 중지하고 새 대화를 시작합니다."
+          },
+          "stop": {
+            "title": "현재 작업 중지",
+            "description": "이 채팅에서 실행 중인 agent 턴을 취소합니다."
+          },
+          "restart": {
+            "title": "nanobot 재시작",
+            "description": "bot 프로세스를 제자리에서 재시작합니다."
+          },
+          "status": {
+            "title": "상태 보기",
+            "description": "런타임, provider, channel 상태를 표시합니다."
+          },
+          "history": {
+            "title": "대화 기록 보기",
+            "description": "저장된 최근 N개의 대화 메시지를 출력합니다."
+          },
+          "dream": {
+            "title": "Dream 실행",
+            "description": "메모리 정리를 수동으로 트리거합니다."
+          },
+          "dream_log": {
+            "title": "Dream 로그 보기",
+            "description": "마지막 Dream 정리에서 변경된 내용을 표시합니다."
+          },
+          "dream_restore": {
+            "title": "메모리 복원",
+            "description": "이전 Dream 스냅샷으로 메모리를 되돌립니다."
+          },
+          "help": {
+            "title": "도움말 보기",
+            "description": "사용 가능한 슬래시 명령을 나열합니다."
+          }
+        }
       }
     },
     "scrollToBottom": "맨 아래로 스크롤"

webui/src/i18n/locales/vi/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "Đang tải cuộc trò chuyện…",
     "empty": {
-      "description": "Hãy đặt câu hỏi, tiếp tục công việc cục bộ hoặc bắt đầu một luồng mới."
+      "description": "Hãy đặt câu hỏi, tiếp tục công việc cục bộ hoặc bắt đầu một luồng mới.",
+      "greeting": "Tôi có thể giúp gì cho bạn?",
+      "quickActions": {
+        "plan": {
+          "title": "Tạo kế hoạch dự án",
+          "prompt": "Tạo một kế hoạch dự án ngắn gọn cho việc tôi nên xây dựng tiếp theo."
+        },
+        "analyze": {
+          "title": "Phân tích dữ liệu này",
+          "prompt": "Giúp tôi phân tích dữ liệu này và chỉ ra các mẫu quan trọng nhất."
+        },
+        "brainstorm": {
+          "title": "Động não ý tưởng",
+          "prompt": "Động não vài ý tưởng thực tế và các đánh đổi cho vấn đề này."
+        },
+        "code": {
+          "title": "Viết mã",
+          "prompt": "Giúp tôi viết mã cho nhiệm vụ này, bắt đầu từ thay đổi hữu ích nhỏ nhất."
+        },
+        "summarize": {
+          "title": "Tóm tắt tài liệu này",
+          "prompt": "Tóm tắt tài liệu này và liệt kê các ý chính."
+        },
+        "more": {
+          "title": "Thêm",
+          "prompt": "Cho tôi xem vài cách hữu ích mà bạn có thể giúp trong workspace này."
+        }
+      }
     },
     "header": {
       "toggleSidebar": "Bật/tắt thanh bên"
@@ -77,6 +104,51 @@
         "decode_failed": "Không thể giải mã ảnh này",
         "too_large": "Ảnh quá lớn — hãy thử ảnh nhỏ hơn",
         "io": "Không thể đọc tệp này"
+      },
+      "slash": {
+        "ariaLabel": "Lệnh slash",
+        "label": "lệnh",
+        "navigateHint": "↑↓ Chọn",
+        "selectHint": "Enter/Tab Chèn",
+        "closeHint": "Esc Đóng",
+        "commands": {
+          "new": {
+            "title": "Cuộc trò chuyện mới",
+            "description": "Dừng tác vụ hiện tại và bắt đầu một cuộc trò chuyện mới."
+          },
+          "stop": {
+            "title": "Dừng tác vụ hiện tại",
+            "description": "Hủy lượt agent đang chạy trong cuộc trò chuyện này."
+          },
+          "restart": {
+            "title": "Khởi động lại nanobot",
+            "description": "Khởi động lại tiến trình bot tại chỗ."
+          },
+          "status": {
+            "title": "Hiển thị trạng thái",
+            "description": "Hiển thị trạng thái runtime, provider và channel."
+          },
+          "history": {
+            "title": "Hiển thị lịch sử",
+            "description": "In N tin nhắn hội thoại đã lưu gần nhất."
+          },
+          "dream": {
+            "title": "Chạy Dream",
+            "description": "Kích hoạt thủ công quá trình hợp nhất bộ nhớ."
+          },
+          "dream_log": {
+            "title": "Hiển thị nhật ký Dream",
+            "description": "Hiển thị những gì lần hợp nhất Dream gần nhất đã thay đổi."
+          },
+          "dream_restore": {
+            "title": "Khôi phục bộ nhớ",
+            "description": "Đưa bộ nhớ về một snapshot Dream trước đó."
+          },
+          "help": {
+            "title": "Hiển thị trợ giúp",
+            "description": "Liệt kê các lệnh slash có sẵn."
+          }
+        }
       }
     },
     "scrollToBottom": "Cuộn xuống cuối"

webui/src/i18n/locales/zh-CN/common.json

@@ -115,6 +115,51 @@
         "deepResearch": "深度研究",
         "voice": "语音输入"
       },
+      "slash": {
+        "ariaLabel": "斜杠命令",
+        "label": "命令",
+        "navigateHint": "↑↓ 选择",
+        "selectHint": "Enter/Tab 填入",
+        "closeHint": "Esc 关闭",
+        "commands": {
+          "new": {
+            "title": "新建对话",
+            "description": "停止当前任务，并开始一个新的对话。"
+          },
+          "stop": {
+            "title": "停止当前任务",
+            "description": "取消这个对话中正在运行的 agent 回合。"
+          },
+          "restart": {
+            "title": "重启 nanobot",
+            "description": "原地重启 bot 进程。"
+          },
+          "status": {
+            "title": "查看状态",
+            "description": "显示运行时、provider 和 channel 状态。"
+          },
+          "history": {
+            "title": "查看对话历史",
+            "description": "打印最近 N 条已持久化的对话消息。"
+          },
+          "dream": {
+            "title": "运行 Dream",
+            "description": "手动触发记忆整理。"
+          },
+          "dream_log": {
+            "title": "查看 Dream 日志",
+            "description": "查看上一次 Dream 整理改变了什么。"
+          },
+          "dream_restore": {
+            "title": "恢复记忆",
+            "description": "将记忆恢复到之前的 Dream 快照。"
+          },
+          "help": {
+            "title": "查看帮助",
+            "description": "列出可用的斜杠命令。"
+          }
+        }
+      },
       "encoding": "处理中…",
       "remove": "移除附件",
       "normalizedSizeHint": "{{orig}} → {{current}}（已自动压缩）",

webui/src/i18n/locales/zh-TW/common.json

@@ -53,7 +53,34 @@
   "thread": {
     "loadingConversation": "正在載入對話…",
     "empty": {
-      "description": "你可以提問、延續本地工作，或是開始新的執行緒。"
+      "description": "你可以提問、延續本地工作，或是開始新的執行緒。",
+      "greeting": "我可以幫你做什麼？",
+      "quickActions": {
+        "plan": {
+          "title": "建立專案計畫",
+          "prompt": "幫我為接下來要做的事情寫一份簡潔的專案計畫。"
+        },
+        "analyze": {
+          "title": "分析這些資料",
+          "prompt": "幫我分析這些資料，並指出最重要的模式。"
+        },
+        "brainstorm": {
+          "title": "腦力激盪想法",
+          "prompt": "圍繞這個問題腦力激盪幾個實用方案，並說明取捨。"
+        },
+        "code": {
+          "title": "撰寫程式碼",
+          "prompt": "幫我為這個任務撰寫程式碼，先從最小可用改動開始。"
+        },
+        "summarize": {
+          "title": "總結這份文件",
+          "prompt": "幫我總結這份文件，並列出關鍵重點。"
+        },
+        "more": {
+          "title": "更多",
+          "prompt": "展示幾個你在這個工作區裡可以幫我的實用方式。"
+        }
+      }
     },
     "header": {
       "toggleSidebar": "切換側邊欄"
@@ -77,6 +104,51 @@
         "decode_failed": "無法解碼這張圖片",
         "too_large": "圖片太大，請換一張小一點的",
         "io": "無法讀取這個檔案"
+      },
+      "slash": {
+        "ariaLabel": "斜線命令",
+        "label": "命令",
+        "navigateHint": "↑↓ 選擇",
+        "selectHint": "Enter/Tab 填入",
+        "closeHint": "Esc 關閉",
+        "commands": {
+          "new": {
+            "title": "新增對話",
+            "description": "停止目前任務，並開始新的對話。"
+          },
+          "stop": {
+            "title": "停止目前任務",
+            "description": "取消這個對話中正在執行的 agent 回合。"
+          },
+          "restart": {
+            "title": "重新啟動 nanobot",
+            "description": "原地重新啟動 bot 進程。"
+          },
+          "status": {
+            "title": "查看狀態",
+            "description": "顯示執行環境、provider 和 channel 狀態。"
+          },
+          "history": {
+            "title": "查看對話歷史",
+            "description": "列印最近 N 則已持久化的對話訊息。"
+          },
+          "dream": {
+            "title": "執行 Dream",
+            "description": "手動觸發記憶整理。"
+          },
+          "dream_log": {
+            "title": "查看 Dream 日誌",
+            "description": "查看上一次 Dream 整理變更了什麼。"
+          },
+          "dream_restore": {
+            "title": "恢復記憶",
+            "description": "將記憶恢復到之前的 Dream 快照。"
+          },
+          "help": {
+            "title": "查看說明",
+            "description": "列出可用的斜線命令。"
+          }
+        }
       }
     },
     "scrollToBottom": "捲動到底部"

webui/src/lib/api.ts

@@ -1,4 +1,4 @@
-import type { ChatSummary, SettingsPayload, SettingsUpdate } from "./types";
+import type { ChatSummary, SettingsPayload, SettingsUpdate, SlashCommand } from "./types";
 
 export class ApiError extends Error {
   status: number;
@@ -114,6 +114,27 @@ export async function fetchSettings(
   return request<SettingsPayload>(`${base}/api/settings`, token);
 }
 
+export async function listSlashCommands(
+  token: string,
+  base: string = "",
+): Promise<SlashCommand[]> {
+  type Row = {
+    command: string;
+    title: string;
+    description: string;
+    icon: string;
+    arg_hint?: string;
+  };
+  const body = await request<{ commands: Row[] }>(`${base}/api/commands`, token);
+  return body.commands.map((command) => ({
+    command: command.command,
+    title: command.title,
+    description: command.description,
+    icon: command.icon,
+    argHint: command.arg_hint ?? "",
+  }));
+}
+
 export async function updateSettings(
   token: string,
   update: SettingsUpdate,

webui/src/lib/types.ts

@@ -89,6 +89,14 @@ export interface SettingsUpdate {
   provider?: string;
 }
 
+export interface SlashCommand {
+  command: string;
+  title: string;
+  description: string;
+  icon: string;
+  argHint?: string;
+}
+
 export type ConnectionStatus =
   | "idle"
   | "connecting"

webui/src/tests/api.test.ts

@@ -1,6 +1,12 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
-import { deleteSession, fetchSessionMessages, listSessions, updateSettings } from "@/lib/api";
+import {
+  deleteSession,
+  fetchSessionMessages,
+  listSessions,
+  listSlashCommands,
+  updateSettings,
+} from "@/lib/api";
 
 describe("webui API helpers", () => {
   beforeEach(() => {
@@ -72,4 +78,37 @@ describe("webui API helpers", () => {
       },
     ]);
   });
+
+  it("maps slash command metadata from the commands endpoint", async () => {
+    vi.mocked(fetch).mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({
+        commands: [
+          {
+            command: "/history",
+            title: "Show conversation history",
+            description: "Print the last N messages.",
+            icon: "history",
+            arg_hint: "[n]",
+          },
+        ],
+      }),
+    } as Response);
+
+    await expect(listSlashCommands("tok")).resolves.toEqual([
+      {
+        command: "/history",
+        title: "Show conversation history",
+        description: "Print the last N messages.",
+        icon: "history",
+        argHint: "[n]",
+      },
+    ]);
+    expect(fetch).toHaveBeenCalledWith(
+      "/api/commands",
+      expect.objectContaining({
+        headers: { Authorization: "Bearer tok" },
+      }),
+    );
+  });
 });

webui/src/tests/i18n.test.tsx

@@ -4,6 +4,9 @@ import { describe, expect, it, vi } from "vitest";
 
 import { LanguageSwitcher } from "@/components/LanguageSwitcher";
 import { ThreadComposer } from "@/components/thread/ThreadComposer";
+import { resources } from "@/i18n";
+
+const QUICK_ACTION_KEYS = ["plan", "analyze", "brainstorm", "code", "summarize", "more"];
 
 describe("webui i18n", () => {
   it("switches UI copy and document locale through the language switcher", async () => {
@@ -41,4 +44,16 @@ describe("webui i18n", () => {
 
     expect(screen.getByLabelText("メッセージ入力欄")).toBeInTheDocument();
   });
+
+  it("keeps welcome quick actions localized for every registered locale", () => {
+    for (const resource of Object.values(resources)) {
+      const empty = resource.common.thread.empty;
+      expect(empty.greeting).toBeTruthy();
+      for (const key of QUICK_ACTION_KEYS) {
+        const action = empty.quickActions[key as keyof typeof empty.quickActions];
+        expect(action.title).toBeTruthy();
+        expect(action.prompt).toBeTruthy();
+      }
+    }
+  });
 });

webui/src/tests/thread-composer.test.tsx

@@ -1,7 +1,24 @@
-import { render, screen } from "@testing-library/react";
+import { fireEvent, render, screen } from "@testing-library/react";
 import { describe, expect, it, vi } from "vitest";
 
 import { ThreadComposer } from "@/components/thread/ThreadComposer";
+import type { SlashCommand } from "@/lib/types";
+
+const COMMANDS: SlashCommand[] = [
+  {
+    command: "/stop",
+    title: "Stop current task",
+    description: "Cancel the active agent turn.",
+    icon: "square",
+  },
+  {
+    command: "/history",
+    title: "Show conversation history",
+    description: "Print the last N persisted messages.",
+    icon: "history",
+    argHint: "[n]",
+  },
+];
 
 describe("ThreadComposer", () => {
   it("renders a readonly hero model composer when provided", () => {
@@ -43,4 +60,35 @@ describe("ThreadComposer", () => {
     expect(screen.getByRole("button", { name: "Attach image" }).className).toContain("bg-card");
     expect(screen.getByRole("button", { name: "Send message" }).className).toContain("bg-foreground");
   });
+
+  it("opens a slash command palette and inserts the selected command", () => {
+    const onSend = vi.fn();
+    render(
+      <ThreadComposer
+        onSend={onSend}
+        placeholder="Type your message..."
+        slashCommands={COMMANDS}
+      />,
+    );
+
+    const input = screen.getByLabelText("Message input");
+    fireEvent.change(input, { target: { value: "/" } });
+
+    expect(screen.getByRole("listbox", { name: "Slash commands" })).toBeInTheDocument();
+    expect(screen.getByRole("option", { name: /\/stop/i })).toHaveAttribute(
+      "aria-selected",
+      "true",
+    );
+
+    fireEvent.keyDown(input, { key: "ArrowDown" });
+    expect(screen.getByRole("option", { name: /\/history/i })).toHaveAttribute(
+      "aria-selected",
+      "true",
+    );
+    fireEvent.keyDown(input, { key: "Enter" });
+
+    expect(input).toHaveValue("/history ");
+    expect(onSend).not.toHaveBeenCalled();
+    expect(screen.queryByRole("listbox", { name: "Slash commands" })).not.toBeInTheDocument();
+  });
 });

webui/src/tests/thread-shell.test.tsx

@@ -434,6 +434,138 @@ describe("ThreadShell", () => {
     });
   });
 
+  it("keeps live assistant replies after visiting the blank new-chat page", async () => {
+    const client = makeClient();
+    vi.stubGlobal(
+      "fetch",
+      vi.fn(async (input: RequestInfo | URL) => {
+        const url = String(input);
+        if (url.includes("websocket%3Achat-a/messages")) {
+          return httpJson({
+            key: "websocket:chat-a",
+            created_at: null,
+            updated_at: null,
+            // Simulate a stale history response that has not persisted the
+            // just-received assistant reply yet.
+            messages: [{ role: "user", content: "hello" }],
+          });
+        }
+        return {
+          ok: false,
+          status: 404,
+          json: async () => ({}),
+        };
+      }),
+    );
+
+    const { rerender } = render(
+      wrap(
+        client,
+        <ThreadShell
+          session={session("chat-a")}
+          title="Chat chat-a"
+          onToggleSidebar={() => {}}
+          onNewChat={() => {}}
+        />,
+      ),
+    );
+
+    await waitFor(() => expect(screen.getByText("hello")).toBeInTheDocument());
+    await act(async () => {
+      client._emitChat("chat-a", {
+        event: "message",
+        chat_id: "chat-a",
+        text: "live assistant reply",
+      });
+    });
+    expect(screen.getByText("live assistant reply")).toBeInTheDocument();
+
+    await act(async () => {
+      rerender(
+        wrap(
+          client,
+          <ThreadShell
+            session={null}
+            title="nanobot"
+            onToggleSidebar={() => {}}
+            onNewChat={() => {}}
+          />,
+        ),
+      );
+    });
+
+    expect(screen.queryByText("live assistant reply")).not.toBeInTheDocument();
+    expect(screen.getByText("What can I do for you?")).toBeInTheDocument();
+
+    await act(async () => {
+      rerender(
+        wrap(
+          client,
+          <ThreadShell
+            session={session("chat-a")}
+            title="Chat chat-a"
+            onToggleSidebar={() => {}}
+            onNewChat={() => {}}
+          />,
+        ),
+      );
+    });
+
+    await waitFor(() => expect(screen.getByText("live assistant reply")).toBeInTheDocument());
+  });
+
+  it("does not open slash commands on the blank welcome page", async () => {
+    const client = makeClient();
+    vi.stubGlobal(
+      "fetch",
+      vi.fn(async (input: RequestInfo | URL) => {
+        const url = String(input);
+        if (url.endsWith("/api/commands")) {
+          return httpJson({
+            commands: [
+              {
+                command: "/stop",
+                title: "Stop current task",
+                description: "Cancel the active agent turn.",
+                icon: "square",
+              },
+            ],
+          });
+        }
+        return {
+          ok: false,
+          status: 404,
+          json: async () => ({}),
+        };
+      }),
+    );
+
+    render(
+      wrap(
+        client,
+        <ThreadShell
+          session={null}
+          title="nanobot"
+          onToggleSidebar={() => {}}
+          onNewChat={() => {}}
+        />,
+      ),
+    );
+
+    await waitFor(() => expect(fetch).toHaveBeenCalledWith(
+      "/api/commands",
+      expect.objectContaining({
+        headers: { Authorization: "Bearer tok" },
+      }),
+    ));
+
+    fireEvent.change(screen.getByLabelText("Message input"), {
+      target: { value: "/" },
+    });
+
+    expect(screen.queryByRole("listbox", { name: "Slash commands" })).not.toBeInTheDocument();
+  });
+
   it("surfaces a dismissible banner when the stream reports message_too_big", async () => {
     const client = makeClient();
     const onNewChat = vi.fn().mockResolvedValue("chat-a");
@@ -454,6 +586,7 @@ describe("ThreadShell", () => {
     // No banner yet: only appears once the client emits a matching error.
     expect(screen.queryByRole("alert")).not.toBeInTheDocument();
 
+    await act(async () => {});
     await act(async () => {
       client._emitError({ kind: "message_too_big" });
     });
@@ -485,6 +618,7 @@ describe("ThreadShell", () => {
       ),
     );
 
+    await act(async () => {});
     await act(async () => {
       client._emitError({ kind: "message_too_big" });
     });