diff --git a/packages/electron/main.mjs b/packages/electron/main.mjs
index ca7a493e..e9bca981 100644
--- a/packages/electron/main.mjs
+++ b/packages/electron/main.mjs
@@ -2255,6 +2255,13 @@ const dispatchMenuAction = (action) => {
   dispatchDomEventToWindow(target, 'openchamber:menu-action', action);
 };
 
+// Append-style menu actions must reach the renderer exactly once. Dual IPC+DOM
+// delivery (dispatchMenuAction) would insert the selection twice.
+const dispatchAddSelectionToChat = () => {
+  const target = getMenuTargetWindow();
+  if (target) emitToWindow(target, 'openchamber:menu-action', 'add-selection-to-chat');
+};
+
 // Mini-chat draft windows are not deduplicated, so this must reach the renderer
 // exactly once — emitToWindow alone (no DOM-event double dispatch). The renderer
 // resolves the active directory/project and opens the window.
@@ -4564,6 +4571,7 @@ const buildMacMenu = () => {
         { type: 'separator' },
         { role: 'cut' },
         { label: 'Copy', accelerator: 'Cmd+C', click: () => handleCopyAction() },
+        { label: 'Add Selection to Chat', accelerator: 'Cmd+L', registerAccelerator: false, click: () => dispatchAddSelectionToChat() },
         { role: 'paste' },
         { role: 'selectAll' },
       ],
@@ -4582,7 +4590,7 @@ const buildMacMenu = () => {
         { label: 'Dark Theme', click: () => dispatchAction('theme-dark') },
         { label: 'System Theme', click: () => dispatchAction('theme-system') },
         { type: 'separator' },
-        { label: 'Toggle Session Sidebar', accelerator: 'Cmd+L', click: () => dispatchAction('toggle-sidebar') },
+        { label: 'Toggle Session Sidebar', accelerator: 'Cmd+Alt+L', click: () => dispatchAction('toggle-sidebar') },
         { label: 'Toggle Memory Debug', accelerator: 'Cmd+Shift+D', click: () => dispatchAction('toggle-memory-debug') },
         { type: 'separator' },
         { role: 'togglefullscreen' },
@@ -4661,6 +4669,7 @@ const buildAutoHiddenMenu = () => {
         { type: 'separator' },
         { role: 'cut' },
         { label: 'Copy', accelerator: 'Ctrl+C', click: () => handleCopyAction() },
+        { label: 'Add Selection to Chat', accelerator: 'Ctrl+L', registerAccelerator: false, click: () => dispatchAddSelectionToChat() },
         { role: 'paste' },
         { role: 'selectAll' },
       ],
@@ -4683,7 +4692,7 @@ const buildAutoHiddenMenu = () => {
         { label: 'Dark Theme', click: () => dispatchAction('theme-dark') },
         { label: 'System Theme', click: () => dispatchAction('theme-system') },
         { type: 'separator' },
-        { label: 'Toggle Session Sidebar', accelerator: 'Ctrl+L', click: () => dispatchAction('toggle-sidebar') },
+        { label: 'Toggle Session Sidebar', accelerator: 'Ctrl+Alt+L', click: () => dispatchAction('toggle-sidebar') },
         { label: 'Toggle Memory Debug', accelerator: 'Ctrl+Shift+D', click: () => dispatchAction('toggle-memory-debug') },
         { type: 'separator' },
         { role: 'togglefullscreen' },
diff --git a/packages/ui/src/components/chat/message/TextSelectionMenu.tsx b/packages/ui/src/components/chat/message/TextSelectionMenu.tsx
index b8d1486c..c8ecc9f4 100644
--- a/packages/ui/src/components/chat/message/TextSelectionMenu.tsx
+++ b/packages/ui/src/components/chat/message/TextSelectionMenu.tsx
@@ -16,6 +16,7 @@ import { useEffectiveDirectory } from '@/hooks/useEffectiveDirectory';
 import { isVSCodeRuntime } from '@/lib/desktop';
 import { useI18n } from '@/lib/i18n';
 import { rangeToMarkdown, trimSelectionValue, wrapMarkdownSelectionForChat } from './selectionMarkdown';
+import { focusChatInput } from '@/components/chat/composer/editor/dom';
 
 interface TextSelectionMenuProps {
   containerRef: React.RefObject<HTMLElement | null>;
@@ -309,6 +310,9 @@ export const TextSelectionMenu: React.FC<TextSelectionMenuProps> = ({ containerR
     
     // Clear selection
     window.getSelection()?.removeAllRanges();
+    queueMicrotask(() => {
+      focusChatInput();
+    });
   }, [selectedTextMarkdown, setPendingInputText, hideMenu]);
 
   const handleCreateNewSession = React.useCallback(async () => {
diff --git a/packages/ui/src/components/ui/HelpDialog.tsx b/packages/ui/src/components/ui/HelpDialog.tsx
index f74b9ee6..027e8833 100644
--- a/packages/ui/src/components/ui/HelpDialog.tsx
+++ b/packages/ui/src/components/ui/HelpDialog.tsx
@@ -65,6 +65,12 @@ export const HelpDialog: React.FC = () => {
           icon: "layout-left",
           keys: '',
         },
+        {
+          id: 'add_selection_to_chat',
+          descriptionKey: "helpDialog.item.addSelectionToChat",
+          icon: "add",
+          keys: '',
+        },
         {
           id: 'cycle_agent',
           keys: '',
diff --git a/packages/ui/src/hooks/useKeyboardShortcuts.ts b/packages/ui/src/hooks/useKeyboardShortcuts.ts
index c3f5a6f4..87cabf01 100644
--- a/packages/ui/src/hooks/useKeyboardShortcuts.ts
+++ b/packages/ui/src/hooks/useKeyboardShortcuts.ts
@@ -16,6 +16,7 @@ import { useDirectoryStore } from '@/stores/useDirectoryStore';
 import { useProjectsStore } from '@/stores/useProjectsStore';
 import { getCycledPrimaryAgentName } from '@/components/chat/mobileControlsUtils';
 import { focusChatInput } from '@/components/chat/composer/editor/dom';
+import { addSelectionToChat } from '@/lib/addSelectionToChat';
 import { hasOpenDropdown } from './keyboard-shortcut-dom';
 
 export const useKeyboardShortcuts = () => {
@@ -337,6 +338,12 @@ export const useKeyboardShortcuts = () => {
         return;
       }
 
+      if (eventMatchesShortcut(e, combo('add_selection_to_chat'))) {
+        e.preventDefault();
+        addSelectionToChat();
+        return;
+      }
+
       if (eventMatchesShortcut(e, combo('toggle_sidebar'))) {
         e.preventDefault();
         const { isMobile, isSessionSwitcherOpen } = useUIStore.getState();
diff --git a/packages/ui/src/hooks/useMenuActions.ts b/packages/ui/src/hooks/useMenuActions.ts
index 6b6abc09..d74243ec 100644
--- a/packages/ui/src/hooks/useMenuActions.ts
+++ b/packages/ui/src/hooks/useMenuActions.ts
@@ -10,6 +10,7 @@ import { useThemeSystem } from '@/contexts/useThemeSystem';
 import { sessionEvents } from '@/lib/sessionEvents';
 import { createWorktreeSession } from '@/lib/worktreeSessionCreator';
 import { showOpenCodeStatus } from '@/lib/openCodeStatus';
+import { addSelectionToChat } from '@/lib/addSelectionToChat';
 
 const getActiveElementSelectedText = (): string => {
   if (typeof document === 'undefined') {
@@ -77,6 +78,7 @@ type MenuAction =
   | 'toggle-terminal'
   | 'toggle-terminal-expanded'
   | 'copy'
+  | 'add-selection-to-chat'
   | 'theme-light'
   | 'theme-dark'
   | 'theme-system'
@@ -278,6 +280,10 @@ export const useMenuActions = (
           setThemeMode('system');
           break;
 
+        case 'add-selection-to-chat':
+          addSelectionToChat();
+          break;
+
         case 'toggle-sidebar':
           toggleSidebar();
           break;
diff --git a/packages/ui/src/lib/addSelectionToChat.test.ts b/packages/ui/src/lib/addSelectionToChat.test.ts
new file mode 100644
index 00000000..6acc225a
--- /dev/null
+++ b/packages/ui/src/lib/addSelectionToChat.test.ts
@@ -0,0 +1,298 @@
+import { afterEach, beforeEach, describe, expect, mock, test } from 'bun:test';
+
+const focusChatInputCalls: number[] = [];
+const pendingInputCalls: Array<{ text: string | null; mode?: string }> = [];
+const activeMainTabCalls: string[] = [];
+const sessionSwitcherCalls: boolean[] = [];
+const codeMirrorDispatches: Array<{ selection: { anchor: number } }> = [];
+
+type MockCodeMirrorView = {
+  state: {
+    selection: { main: { from: number; to: number } };
+    sliceDoc: (from: number, to: number) => string;
+  };
+  dispatch: (transaction: { selection: { anchor: number } }) => void;
+};
+
+let codeMirrorView: MockCodeMirrorView | null = null;
+
+mock.module('@codemirror/view', () => ({
+  EditorView: {
+    findFromDOM: () => codeMirrorView,
+  },
+}));
+
+mock.module('@/components/chat/composer/editor/dom', () => ({
+  focusChatInput: () => {
+    focusChatInputCalls.push(1);
+  },
+}));
+
+mock.module('@/sync/input-store', () => ({
+  useInputStore: {
+    getState: () => ({
+      setPendingInputText: (text: string | null, mode?: string) => {
+        pendingInputCalls.push({ text, mode });
+      },
+    }),
+  },
+}));
+
+mock.module('@/stores/useUIStore', () => ({
+  useUIStore: {
+    getState: () => ({
+      setActiveMainTab: (tab: string) => {
+        activeMainTabCalls.push(tab);
+      },
+      setSessionSwitcherOpen: (open: boolean) => {
+        sessionSwitcherCalls.push(open);
+      },
+    }),
+  },
+}));
+
+const { addSelectionToChat, captureSelectionMarkdownForChat } = await import('./addSelectionToChat');
+
+const originalDocument = globalThis.document;
+const originalWindow = globalThis.window;
+
+const installSelectionEnvironment = (options: {
+  activeElement?: Element | null;
+  focusedCodeMirror?: Element | null;
+  selection?: Selection | null;
+} = {}) => {
+  const {
+    activeElement = null,
+    focusedCodeMirror = null,
+    selection = null,
+  } = options;
+
+  const documentLike = {
+    activeElement,
+    querySelector: (selector: string) => {
+      if (selector === '.cm-editor.cm-focused') {
+        return focusedCodeMirror;
+      }
+      return null;
+    },
+  };
+  const windowLike = {
+    getSelection: () => selection,
+  };
+  Object.defineProperty(globalThis, 'document', { value: documentLike, configurable: true });
+  Object.defineProperty(globalThis, 'window', { value: windowLike, configurable: true });
+};
+
+const clearCalls = () => {
+  focusChatInputCalls.length = 0;
+  pendingInputCalls.length = 0;
+  activeMainTabCalls.length = 0;
+  sessionSwitcherCalls.length = 0;
+  codeMirrorDispatches.length = 0;
+  codeMirrorView = null;
+};
+
+afterEach(() => {
+  Object.defineProperty(globalThis, 'document', { value: originalDocument, configurable: true });
+  Object.defineProperty(globalThis, 'window', { value: originalWindow, configurable: true });
+});
+
+describe('captureSelectionMarkdownForChat', () => {
+  beforeEach(() => {
+    clearCalls();
+  });
+
+  test('returns null when nothing is selected', () => {
+    installSelectionEnvironment();
+    expect(captureSelectionMarkdownForChat()).toBeNull();
+  });
+
+  test('captures a textarea selection outside the composer and collapses it', () => {
+    const textarea = {
+      tagName: 'TEXTAREA',
+      value: 'alpha beta gamma',
+      selectionStart: 6,
+      selectionEnd: 10,
+      closest: () => null,
+    } as unknown as HTMLTextAreaElement;
+
+    installSelectionEnvironment({ activeElement: textarea });
+    expect(captureSelectionMarkdownForChat()).toBe('```md\nbeta\n```');
+    expect(textarea.selectionStart).toBe(10);
+    expect(textarea.selectionEnd).toBe(10);
+  });
+
+  test('ignores selections inside the chat composer', () => {
+    const textarea = {
+      tagName: 'TEXTAREA',
+      value: 'draft text',
+      selectionStart: 0,
+      selectionEnd: 5,
+      closest: (selector: string) => (selector === '[data-chat-input="true"]' ? textarea : null),
+    } as unknown as HTMLTextAreaElement;
+
+    installSelectionEnvironment({ activeElement: textarea });
+    expect(captureSelectionMarkdownForChat()).toBeNull();
+  });
+
+  test('captures a focused CodeMirror selection outside the composer and collapses it', () => {
+    const focusedEditor = {
+      closest: () => null,
+    } as unknown as HTMLElement;
+
+    codeMirrorView = {
+      state: {
+        selection: { main: { from: 4, to: 11 } },
+        sliceDoc: (from: number, to: number) => 'const x'.slice(0, to - from),
+      },
+      dispatch: (transaction) => {
+        codeMirrorDispatches.push(transaction);
+        codeMirrorView!.state.selection.main = {
+          from: transaction.selection.anchor,
+          to: transaction.selection.anchor,
+        };
+      },
+    };
+
+    // sliceDoc should return the selected slice; use explicit text instead of slice math.
+    codeMirrorView.state.sliceDoc = () => 'const x';
+
+    installSelectionEnvironment({ focusedCodeMirror: focusedEditor });
+    expect(captureSelectionMarkdownForChat()).toBe('```\nconst x\n```');
+    expect(codeMirrorDispatches).toEqual([{ selection: { anchor: 11 } }]);
+    expect(codeMirrorView.state.selection.main).toEqual({ from: 11, to: 11 });
+  });
+
+  test('ignores a focused CodeMirror editor inside the chat composer', () => {
+    const focusedEditor = {
+      closest: (selector: string) => (selector === '[data-chat-input="true"]' ? focusedEditor : null),
+    } as unknown as HTMLElement;
+
+    codeMirrorView = {
+      state: {
+        selection: { main: { from: 0, to: 5 } },
+        sliceDoc: () => 'draft',
+      },
+      dispatch: (transaction) => {
+        codeMirrorDispatches.push(transaction);
+      },
+    };
+
+    installSelectionEnvironment({ focusedCodeMirror: focusedEditor });
+    expect(captureSelectionMarkdownForChat()).toBeNull();
+    expect(codeMirrorDispatches).toEqual([]);
+  });
+
+  test('captures a DOM selection from chat-message content and clears it', () => {
+    const parent = {
+      closest: (selector: string) => (selector === 'pre code' ? null : null),
+    };
+    const textNode = {
+      nodeType: 3,
+      parentElement: parent,
+    };
+    let rangeCount = 1;
+    let collapsed = false;
+    const selection = {
+      get rangeCount() {
+        return rangeCount;
+      },
+      get isCollapsed() {
+        return collapsed;
+      },
+      toString: () => 'Hello world',
+      getRangeAt: () => ({
+        commonAncestorContainer: textNode,
+        startContainer: textNode,
+        endContainer: textNode,
+        cloneContents: () => ({ childNodes: [] }),
+      }),
+      removeAllRanges: () => {
+        rangeCount = 0;
+        collapsed = true;
+      },
+    } as unknown as Selection;
+
+    installSelectionEnvironment({ selection });
+    expect(captureSelectionMarkdownForChat()).toBe('```md\nHello world\n```');
+    expect(selection.rangeCount).toBe(0);
+    expect(selection.isCollapsed).toBe(true);
+  });
+
+  test('ignores a DOM selection inside the chat composer', () => {
+    const composerHost = {};
+    const parent = {
+      closest: (selector: string) => (selector === '[data-chat-input="true"]' ? composerHost : null),
+    };
+    const textNode = {
+      nodeType: 3,
+      parentElement: parent,
+    };
+    const selection = {
+      rangeCount: 1,
+      isCollapsed: false,
+      toString: () => 'draft',
+      getRangeAt: () => ({
+        commonAncestorContainer: textNode,
+        startContainer: textNode,
+        endContainer: textNode,
+        cloneContents: () => ({ childNodes: [] }),
+      }),
+      removeAllRanges: () => undefined,
+    } as unknown as Selection;
+
+    installSelectionEnvironment({ selection });
+    expect(captureSelectionMarkdownForChat()).toBeNull();
+  });
+});
+
+describe('addSelectionToChat', () => {
+  beforeEach(() => {
+    clearCalls();
+  });
+
+  test('appends captured selection and focuses chat input', async () => {
+    const textarea = {
+      tagName: 'TEXTAREA',
+      value: 'selected',
+      selectionStart: 0,
+      selectionEnd: 8,
+      closest: () => null,
+    } as unknown as HTMLTextAreaElement;
+    installSelectionEnvironment({ activeElement: textarea });
+
+    expect(addSelectionToChat()).toBe(true);
+    expect(activeMainTabCalls).toEqual(['chat']);
+    expect(sessionSwitcherCalls).toEqual([false]);
+    expect(pendingInputCalls).toEqual([{ text: '```md\nselected\n```', mode: 'append' }]);
+
+    await Promise.resolve();
+    expect(focusChatInputCalls.length).toBe(1);
+  });
+
+  test('second capture after textarea collapse does not append again', () => {
+    const textarea = {
+      tagName: 'TEXTAREA',
+      value: 'selected',
+      selectionStart: 0,
+      selectionEnd: 8,
+      closest: () => null,
+    } as unknown as HTMLTextAreaElement;
+    installSelectionEnvironment({ activeElement: textarea });
+
+    expect(addSelectionToChat()).toBe(true);
+    expect(addSelectionToChat()).toBe(false);
+    expect(pendingInputCalls).toEqual([{ text: '```md\nselected\n```', mode: 'append' }]);
+  });
+
+  test('focuses chat input when nothing is selected', async () => {
+    installSelectionEnvironment();
+
+    expect(addSelectionToChat()).toBe(false);
+    expect(pendingInputCalls).toEqual([]);
+    expect(activeMainTabCalls).toEqual(['chat']);
+
+    await Promise.resolve();
+    expect(focusChatInputCalls.length).toBe(1);
+  });
+});
diff --git a/packages/ui/src/lib/addSelectionToChat.ts b/packages/ui/src/lib/addSelectionToChat.ts
new file mode 100644
index 00000000..ce296569
--- /dev/null
+++ b/packages/ui/src/lib/addSelectionToChat.ts
@@ -0,0 +1,166 @@
+import { EditorView } from '@codemirror/view';
+import { focusChatInput } from '@/components/chat/composer/editor/dom';
+import {
+  formatCodeSelectionMarkdown,
+  rangeToMarkdown,
+  trimSelectionValue,
+  wrapMarkdownSelectionForChat,
+} from '@/components/chat/message/selectionMarkdown';
+import { useInputStore } from '@/sync/input-store';
+import { useUIStore } from '@/stores/useUIStore';
+
+const CHAT_INPUT_HOST_SELECTOR = '[data-chat-input="true"]';
+
+const isInsideChatComposer = (node: Node | null): boolean => {
+  if (!node) {
+    return false;
+  }
+  const asElement = node as Element;
+  const element = typeof asElement.closest === 'function'
+    ? asElement
+    : (node as Node).parentElement;
+  return Boolean(element?.closest(CHAT_INPUT_HOST_SELECTOR));
+};
+
+const readTextControlSelection = (element: Element): string | null => {
+  if (isInsideChatComposer(element)) {
+    return null;
+  }
+
+  const tag = element.tagName?.toLowerCase();
+  if (tag === 'textarea') {
+    const control = element as HTMLTextAreaElement;
+    const start = control.selectionStart ?? 0;
+    const end = control.selectionEnd ?? 0;
+    const text = trimSelectionValue(control.value.slice(start, end));
+    if (!text) {
+      return null;
+    }
+    // Collapse so a duplicate menu delivery cannot append the same range twice.
+    control.selectionStart = end;
+    control.selectionEnd = end;
+    return text;
+  }
+
+  if (tag === 'input') {
+    const control = element as HTMLInputElement;
+    const type = control.type?.toLowerCase() ?? 'text';
+    if (!['text', 'search', 'url', 'tel', 'password'].includes(type)) {
+      return null;
+    }
+    const start = control.selectionStart ?? 0;
+    const end = control.selectionEnd ?? 0;
+    const text = trimSelectionValue(control.value.slice(start, end));
+    if (!text) {
+      return null;
+    }
+    control.selectionStart = end;
+    control.selectionEnd = end;
+    return text;
+  }
+
+  return null;
+};
+
+const captureActiveElementSelection = (): string | null => {
+  if (typeof document === 'undefined') {
+    return null;
+  }
+
+  const activeElement = document.activeElement;
+  if (!activeElement || typeof (activeElement as Element).tagName !== 'string') {
+    return null;
+  }
+
+  const text = readTextControlSelection(activeElement as Element);
+  return text ? wrapMarkdownSelectionForChat(text) : null;
+};
+
+const captureCodeMirrorSelection = (): string | null => {
+  if (typeof document === 'undefined') {
+    return null;
+  }
+
+  const focusedEditor = document.querySelector<HTMLElement>('.cm-editor.cm-focused');
+  if (!focusedEditor || isInsideChatComposer(focusedEditor)) {
+    return null;
+  }
+
+  const view = EditorView.findFromDOM(focusedEditor);
+  if (!view) {
+    return null;
+  }
+
+  const { from, to } = view.state.selection.main;
+  if (from === to) {
+    return null;
+  }
+
+  const text = trimSelectionValue(view.state.sliceDoc(from, to));
+  if (!text) {
+    return null;
+  }
+
+  view.dispatch({
+    selection: { anchor: to },
+  });
+
+  return formatCodeSelectionMarkdown(text);
+};
+
+const captureDomSelection = (): string | null => {
+  if (typeof window === 'undefined') {
+    return null;
+  }
+
+  const selection = window.getSelection();
+  if (!selection || selection.rangeCount === 0 || selection.isCollapsed) {
+    return null;
+  }
+
+  const range = selection.getRangeAt(0);
+  if (isInsideChatComposer(range.commonAncestorContainer)) {
+    return null;
+  }
+
+  const plainText = trimSelectionValue(selection.toString());
+  if (!plainText) {
+    return null;
+  }
+
+  const markdown = rangeToMarkdown(range, plainText);
+  selection.removeAllRanges();
+  return wrapMarkdownSelectionForChat(markdown);
+};
+
+/**
+ * Capture the current non-composer selection as chat-ready markdown.
+ * Returns null when nothing usable is selected.
+ */
+export const captureSelectionMarkdownForChat = (): string | null => {
+  return captureCodeMirrorSelection()
+    ?? captureActiveElementSelection()
+    ?? captureDomSelection();
+};
+
+/**
+ * Append the current selection to the chat composer.
+ * When nothing is selected, focuses the chat input (Cursor-style Ctrl/Cmd+L).
+ * Returns true when selected text was appended.
+ */
+export const addSelectionToChat = (): boolean => {
+  const markdown = captureSelectionMarkdownForChat();
+
+  useUIStore.getState().setActiveMainTab('chat');
+  useUIStore.getState().setSessionSwitcherOpen(false);
+
+  if (markdown) {
+    useInputStore.getState().setPendingInputText(markdown, 'append');
+  }
+
+  queueMicrotask(() => {
+    focusChatInput();
+  });
+
+  return markdown !== null;
+};
diff --git a/packages/ui/src/lib/i18n/messages/de.settings.ts b/packages/ui/src/lib/i18n/messages/de.settings.ts
index 2bf271a5..fc3cfa86 100644
--- a/packages/ui/src/lib/i18n/messages/de.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/de.settings.ts
@@ -1038,6 +1038,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': 'Einstellungen öffnen',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': 'Terminal-Dock umschalten',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': 'Terminal erweitert umschalten',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': 'Auswahl zum Chat hinzufügen',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': 'Seitenleiste umschalten',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': 'Rechte Seitenleiste umschalten',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': 'Git-Tab der rechten Seitenleiste öffnen',
diff --git a/packages/ui/src/lib/i18n/messages/de.ts b/packages/ui/src/lib/i18n/messages/de.ts
index e740b352..99a50cd0 100644
--- a/packages/ui/src/lib/i18n/messages/de.ts
+++ b/packages/ui/src/lib/i18n/messages/de.ts
@@ -1532,6 +1532,7 @@ export const dict = {
   'helpDialog.item.openCommandPalette': 'Befehlspalette öffnen',
   'helpDialog.item.showKeyboardShortcuts': 'Tastaturkürzel anzeigen (dieses Dialogfeld)',
   'helpDialog.item.toggleSessionSidebar': 'Sitzungs-Seitenleiste umschalten',
+  'helpDialog.item.addSelectionToChat': 'Auswahl zum Chat hinzufügen',
   'helpDialog.item.cycleAgent': 'Agent wechseln (Chat-Eingabe)',
   'helpDialog.item.openModelSelector': 'Modell-Auswahldialog öffnen',
   'helpDialog.item.navigateModels': 'Modelle navigieren (in Auswahl)',
diff --git a/packages/ui/src/lib/i18n/messages/en.settings.ts b/packages/ui/src/lib/i18n/messages/en.settings.ts
index 6261cb9c..4a1deb81 100644
--- a/packages/ui/src/lib/i18n/messages/en.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/en.settings.ts
@@ -1103,6 +1103,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': 'Open settings',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': 'Toggle terminal dock',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': 'Toggle terminal expanded',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': 'Add selection to chat',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': 'Toggle sidebar',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': 'Toggle context panel',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': 'Open Git surface',
diff --git a/packages/ui/src/lib/i18n/messages/en.ts b/packages/ui/src/lib/i18n/messages/en.ts
index fadeeaab..1bb6b1c1 100644
--- a/packages/ui/src/lib/i18n/messages/en.ts
+++ b/packages/ui/src/lib/i18n/messages/en.ts
@@ -1679,6 +1679,7 @@ export const dict = {
   'helpDialog.item.openCommandPalette': 'Open Command Palette',
   'helpDialog.item.showKeyboardShortcuts': 'Show Keyboard Shortcuts (this dialog)',
   'helpDialog.item.toggleSessionSidebar': 'Toggle Session Sidebar',
+  'helpDialog.item.addSelectionToChat': 'Add Selection to Chat',
   'helpDialog.item.cycleAgent': 'Cycle Agent (chat input)',
   'helpDialog.item.openModelSelector': 'Open Model Selector',
   'helpDialog.item.navigateModels': 'Navigate Models (in picker)',
diff --git a/packages/ui/src/lib/i18n/messages/es.settings.ts b/packages/ui/src/lib/i18n/messages/es.settings.ts
index 7f13e2e3..31b07208 100644
--- a/packages/ui/src/lib/i18n/messages/es.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/es.settings.ts
@@ -1070,6 +1070,7 @@ export const settingsDict = {
   "settings.openchamber.keyboardShortcuts.action.open_settings.label": "Abrir configuración",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal.label": "Mostrar u ocultar panel de terminal",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label": "Expandir o contraer terminal",
+  "settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label": "Agregar selección al chat",
   "settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label": "Mostrar u ocultar barra lateral",
   "settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label": 'Alternar panel de contexto',
   "settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label": 'Abrir superficie de Git',
diff --git a/packages/ui/src/lib/i18n/messages/es.ts b/packages/ui/src/lib/i18n/messages/es.ts
index 76c6dec0..6719cc2b 100644
--- a/packages/ui/src/lib/i18n/messages/es.ts
+++ b/packages/ui/src/lib/i18n/messages/es.ts
@@ -1657,6 +1657,7 @@ export const dict: Record<I18nKey, string> = {
   "helpDialog.item.openCommandPalette": "Abrir paleta de comandos",
   "helpDialog.item.showKeyboardShortcuts": "Mostrar atajos de teclado (este diálogo)",
   "helpDialog.item.toggleSessionSidebar": "Mostrar u ocultar barra lateral de sesión",
+  "helpDialog.item.addSelectionToChat": "Agregar selección al chat",
   "helpDialog.item.cycleAgent": "Cambiar agente (entrada de chat)",
   "helpDialog.item.openModelSelector": "Abrir selector de modelos",
   "helpDialog.item.navigateModels": "Navegar modelos (en selector)",
diff --git a/packages/ui/src/lib/i18n/messages/fr.settings.ts b/packages/ui/src/lib/i18n/messages/fr.settings.ts
index d0034fa8..f5dc26d4 100644
--- a/packages/ui/src/lib/i18n/messages/fr.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/fr.settings.ts
@@ -991,6 +991,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': 'Ouvrir les paramètres',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': 'Basculer la station d\'accueil du terminal',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': 'Terminal à bascule étendu',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': 'Ajouter la sélection au chat',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': 'Basculer la barre latérale',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': 'Afficher/masquer le panneau de contexte',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': 'Ouvrir la surface Git',
diff --git a/packages/ui/src/lib/i18n/messages/fr.ts b/packages/ui/src/lib/i18n/messages/fr.ts
index 4104c436..042f21c3 100644
--- a/packages/ui/src/lib/i18n/messages/fr.ts
+++ b/packages/ui/src/lib/i18n/messages/fr.ts
@@ -1492,6 +1492,7 @@ export const dict = {
   'helpDialog.item.openCommandPalette': 'Ouvrir la palette de commandes',
   'helpDialog.item.showKeyboardShortcuts': 'Afficher les raccourcis clavier (cette boîte de dialogue)',
   'helpDialog.item.toggleSessionSidebar': 'Toggle la barre latérale de la session',
+  'helpDialog.item.addSelectionToChat': 'Ajouter la sélection au chat',
   'helpDialog.item.cycleAgent': 'Agent de cycle (entrée de chat)',
   'helpDialog.item.openModelSelector': 'Ouvrir le sélecteur de modèle',
   'helpDialog.item.navigateModels': 'Naviguer dans les modèles (dans le sélecteur)',
diff --git a/packages/ui/src/lib/i18n/messages/ja.settings.ts b/packages/ui/src/lib/i18n/messages/ja.settings.ts
index f61974f8..3d7565a9 100644
--- a/packages/ui/src/lib/i18n/messages/ja.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ja.settings.ts
@@ -1103,6 +1103,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': '設定を開く',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': 'ターミナルドックの切替',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': 'ターミナル拡大の切替',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': '選択範囲をチャットに追加',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': 'サイドバーの切替',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': 'コンテキストパネルの表示切替',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': 'Git サーフェスを開く',
diff --git a/packages/ui/src/lib/i18n/messages/ja.ts b/packages/ui/src/lib/i18n/messages/ja.ts
index fd1189d5..0feeccc7 100644
--- a/packages/ui/src/lib/i18n/messages/ja.ts
+++ b/packages/ui/src/lib/i18n/messages/ja.ts
@@ -1675,6 +1675,7 @@ export const dict: Record<I18nKey, string> = {
   'helpDialog.item.openCommandPalette': 'コマンドパレットを開く',
   'helpDialog.item.showKeyboardShortcuts': 'キーボードショートカットを表示（このダイアログ）',
   'helpDialog.item.toggleSessionSidebar': 'セッションサイドバーの切り替え',
+  'helpDialog.item.addSelectionToChat': '選択範囲をチャットに追加',
   'helpDialog.item.cycleAgent': 'エージェント切り替え（チャット入力）',
   'helpDialog.item.openModelSelector': 'モデルセレクターを開く',
   'helpDialog.item.navigateModels': 'モデルを移動（ピッカー内）',
diff --git a/packages/ui/src/lib/i18n/messages/ko.settings.ts b/packages/ui/src/lib/i18n/messages/ko.settings.ts
index 54f276d4..df181c60 100644
--- a/packages/ui/src/lib/i18n/messages/ko.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.settings.ts
@@ -1070,6 +1070,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': '설정 열기',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': '터미널 dock 토글',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': '터미널 확장 토글',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': '선택 내용을 채팅에 추가',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': '사이드바 토글',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': '컨텍스트 패널 표시 전환',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': 'Git 서피스 열기',
diff --git a/packages/ui/src/lib/i18n/messages/ko.ts b/packages/ui/src/lib/i18n/messages/ko.ts
index 3d0a4e7b..c47b078b 100644
--- a/packages/ui/src/lib/i18n/messages/ko.ts
+++ b/packages/ui/src/lib/i18n/messages/ko.ts
@@ -1681,6 +1681,7 @@ export const dict: Record<I18nKey, string> = {
   'helpDialog.item.openCommandPalette': '명령 팔레트 열기',
   'helpDialog.item.showKeyboardShortcuts': '키보드 단축키 보기(이 대화상자)',
   'helpDialog.item.toggleSessionSidebar': '토글 세션 사이드바',
+  'helpDialog.item.addSelectionToChat': '선택 내용을 채팅에 추가',
   'helpDialog.item.cycleAgent': '에이전트 순환(채팅 입력)',
   'helpDialog.item.openModelSelector': '모델 선택기 열기',
   'helpDialog.item.navigateModels': '모델 이동(선택기)',
diff --git a/packages/ui/src/lib/i18n/messages/pl.settings.ts b/packages/ui/src/lib/i18n/messages/pl.settings.ts
index c0ac580c..dcc3d774 100644
--- a/packages/ui/src/lib/i18n/messages/pl.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.settings.ts
@@ -825,6 +825,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.toggle_context_plan.label': 'Przełącz panel kontekstu planu',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': 'Przełącz panel kontekstu',
   'settings.openchamber.keyboardShortcuts.action.toggle_services_menu.label': 'Przełącz menu usług',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': 'Dodaj zaznaczenie do czatu',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': 'Przełącz pasek boczny',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': 'Przełącz dokowanie terminala',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': 'Przełącz rozszerzony terminal',
diff --git a/packages/ui/src/lib/i18n/messages/pl.ts b/packages/ui/src/lib/i18n/messages/pl.ts
index 2312a1d9..acc03cfd 100644
--- a/packages/ui/src/lib/i18n/messages/pl.ts
+++ b/packages/ui/src/lib/i18n/messages/pl.ts
@@ -2325,6 +2325,7 @@ export const dict: Record<I18nKey, string> = {
   'helpDialog.item.toggleRightSidebar': 'Przełącz panel kontekstu',
   'helpDialog.item.toggleServicesMenu': 'Przełącz menu usług',
   'helpDialog.item.toggleSessionSidebar': 'Przełącz panel sesji',
+  'helpDialog.item.addSelectionToChat': 'Dodaj zaznaczenie do czatu',
   'helpDialog.item.toggleTerminalDock': 'Przełącz dolny terminal',
   'helpDialog.item.toggleTerminalExpanded': 'Przełącz rozszerzenie terminala',
   'helpDialog.keyCombiner.or': 'lub',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts b/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
index 19dc9b39..5950ec10 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.settings.ts
@@ -1070,6 +1070,7 @@ export const settingsDict = {
   "settings.openchamber.keyboardShortcuts.action.open_settings.label": "Abrir configurações",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal.label": "Mostrar ou ocultar painel de terminal",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label": "Expandir ou recolher terminal",
+  "settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label": "Adicionar seleção ao chat",
   "settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label": "Mostrar ou ocultar barra lateral",
   "settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label": 'Alternar painel de contexto',
   "settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label": 'Abrir superfície do Git',
diff --git a/packages/ui/src/lib/i18n/messages/pt-BR.ts b/packages/ui/src/lib/i18n/messages/pt-BR.ts
index 1111a781..748628b3 100644
--- a/packages/ui/src/lib/i18n/messages/pt-BR.ts
+++ b/packages/ui/src/lib/i18n/messages/pt-BR.ts
@@ -1657,6 +1657,7 @@ export const dict: Record<I18nKey, string> = {
   "helpDialog.item.openCommandPalette": "Abrir paleta de comandos",
   "helpDialog.item.showKeyboardShortcuts": "Mostrar atalhos de teclado (este diálogo)",
   "helpDialog.item.toggleSessionSidebar": "Mostrar ou ocultar barra lateral de sessão",
+  "helpDialog.item.addSelectionToChat": "Adicionar seleção ao chat",
   "helpDialog.item.cycleAgent": "Alternar agente (entrada do chat)",
   "helpDialog.item.openModelSelector": "Abrir seletor de modelos",
   "helpDialog.item.navigateModels": "Navegar por modelos (no seletor)",
diff --git a/packages/ui/src/lib/i18n/messages/uk.settings.ts b/packages/ui/src/lib/i18n/messages/uk.settings.ts
index a7325ccb..306608d2 100644
--- a/packages/ui/src/lib/i18n/messages/uk.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.settings.ts
@@ -1070,6 +1070,7 @@ export const settingsDict = {
   "settings.openchamber.keyboardShortcuts.action.open_settings.label": "Відкрити налаштування",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal.label": "Перемкнути панель терміналу",
   "settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label": "Розгорнути або згорнути термінал",
+  "settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label": "Додати виділення в чат",
   "settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label": "Перемкнути бічну панель",
   "settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label": 'Перемкнути контекстну панель',
   "settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label": 'Відкрити поверхню Git',
diff --git a/packages/ui/src/lib/i18n/messages/uk.ts b/packages/ui/src/lib/i18n/messages/uk.ts
index d6c43bbb..c573b669 100644
--- a/packages/ui/src/lib/i18n/messages/uk.ts
+++ b/packages/ui/src/lib/i18n/messages/uk.ts
@@ -1657,6 +1657,7 @@ export const dict: Record<I18nKey, string> = {
   "helpDialog.item.openCommandPalette": "Відкрити палітру команд",
   "helpDialog.item.showKeyboardShortcuts": "Показати комбінації клавіш (це діалогове вікно)",
   "helpDialog.item.toggleSessionSidebar": "Перемкнути бічну панель сесій",
+  "helpDialog.item.addSelectionToChat": "Додати виділення в чат",
   "helpDialog.item.cycleAgent": "Перемкнути агента (введення в чат)",
   "helpDialog.item.openModelSelector": "Відкрити засіб вибору моделі",
   "helpDialog.item.navigateModels": "Навігація моделями (у засобі вибору)",
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts b/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
index adc5a8b6..42aa7d0a 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.settings.ts
@@ -1070,6 +1070,7 @@ export const settingsDict = {
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': '打开设置',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': '切换终端停靠区',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': '切换终端展开',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': '将选中内容添加到聊天',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': '切换侧边栏',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': '切换上下文面板',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': '打开 Git 界面',
diff --git a/packages/ui/src/lib/i18n/messages/zh-CN.ts b/packages/ui/src/lib/i18n/messages/zh-CN.ts
index dd7cccc8..558cc2fa 100644
--- a/packages/ui/src/lib/i18n/messages/zh-CN.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-CN.ts
@@ -1645,6 +1645,7 @@ export const dict: Record<I18nKey, string> = {
   'helpDialog.item.openCommandPalette': '打开命令面板',
   'helpDialog.item.showKeyboardShortcuts': '显示键盘快捷键（此对话框）',
   'helpDialog.item.toggleSessionSidebar': '切换会话侧边栏',
+  'helpDialog.item.addSelectionToChat': '将选中内容添加到聊天',
   'helpDialog.item.cycleAgent': '循环切换智能体（聊天输入）',
   'helpDialog.item.openModelSelector': '打开模型选择器',
   'helpDialog.item.navigateModels': '导航模型（选择器中）',
diff --git a/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts b/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
index 24571ef4..a1d814b0 100644
--- a/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-TW.settings.ts
@@ -977,6 +977,7 @@
   'settings.openchamber.keyboardShortcuts.action.open_settings.label': '開啟設定',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal.label': '切換終端機停靠區',
   'settings.openchamber.keyboardShortcuts.action.toggle_terminal_expanded.label': '切換終端機展開',
+  'settings.openchamber.keyboardShortcuts.action.add_selection_to_chat.label': '將選取內容加入聊天',
   'settings.openchamber.keyboardShortcuts.action.toggle_sidebar.label': '切換側邊欄',
   'settings.openchamber.keyboardShortcuts.action.toggle_right_sidebar.label': '切換上下文面板',
   'settings.openchamber.keyboardShortcuts.action.open_right_sidebar_git.label': '開啟 Git 介面',
diff --git a/packages/ui/src/lib/i18n/messages/zh-TW.ts b/packages/ui/src/lib/i18n/messages/zh-TW.ts
index 9de1163e..6bf7546a 100644
--- a/packages/ui/src/lib/i18n/messages/zh-TW.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-TW.ts
@@ -1649,6 +1649,7 @@ export const dict: Record<I18nKey, string> = {
   'helpDialog.item.openCommandPalette': '開啟命令面板',
   'helpDialog.item.showKeyboardShortcuts': '顯示鍵盤快速鍵（此對話方塊）',
   'helpDialog.item.toggleSessionSidebar': '切換會話側邊欄',
+  'helpDialog.item.addSelectionToChat': '將選取內容加入聊天',
   'helpDialog.item.cycleAgent': '循環切換 Agent（聊天輸入）',
   'helpDialog.item.openModelSelector': '開啟模型選擇器',
   'helpDialog.item.navigateModels': '導覽模型（選擇器中）',
diff --git a/packages/ui/src/lib/shortcuts.ts b/packages/ui/src/lib/shortcuts.ts
index e6e16e29..6afb4656 100644
--- a/packages/ui/src/lib/shortcuts.ts
+++ b/packages/ui/src/lib/shortcuts.ts
@@ -159,8 +159,15 @@ const SHORTCUT_ACTIONS: ReadonlyArray<ShortcutAction> = [
     description: 'Toggle the files panel',
   },
   {
-    id: 'toggle_sidebar',
+    id: 'add_selection_to_chat',
     defaultCombo: 'mod+l',
+    label: 'Add selection to chat',
+    description: 'Add the selected text to the chat input',
+    customizable: true,
+  },
+  {
+    id: 'toggle_sidebar',
+    defaultCombo: 'mod+alt+l',
     label: 'Toggle sidebar',
     description: 'Toggle the session sidebar',
     customizable: true,