diff --git a/src/App.tsx b/src/App.tsx
index 69f623d1..85490fbf 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1059,6 +1059,8 @@ function MainApp() {
     activeWorkspace,
     models,
     selectedModelId,
+    effort: resolvedEffort,
+    collaborationMode: collaborationModePayload,
     addWorktreeAgent,
     connectWorkspace,
     startThreadForWorkspace,
@@ -1962,6 +1964,13 @@ function MainApp() {
       modelSelections={workspaceModelSelections}
       onToggleModel={toggleWorkspaceModelSelection}
       onModelCountChange={setWorkspaceModelCount}
+      collaborationModes={collaborationModes}
+      selectedCollaborationModeId={selectedCollaborationModeId}
+      onSelectCollaborationMode={setSelectedCollaborationModeId}
+      reasoningOptions={reasoningOptions}
+      selectedEffort={selectedEffort}
+      onSelectEffort={setSelectedEffort}
+      reasoningSupported={reasoningSupported}
       error={workspaceRunError}
       isSubmitting={workspaceRunSubmitting}
       activeWorkspaceId={activeWorkspaceId}
diff --git a/src/features/workspaces/components/WorkspaceHome.tsx b/src/features/workspaces/components/WorkspaceHome.tsx
index 97b0c065..9c6c8fa9 100644
--- a/src/features/workspaces/components/WorkspaceHome.tsx
+++ b/src/features/workspaces/components/WorkspaceHome.tsx
@@ -15,6 +15,7 @@ import type {
   SkillOption,
   WorkspaceInfo,
 } from "../../../types";
+import { formatCollaborationModeLabel } from "../../../utils/collaborationModes";
 import { ComposerInput } from "../../composer/components/ComposerInput";
 import { useComposerImages } from "../../composer/hooks/useComposerImages";
 import { useComposerAutocompleteState } from "../../composer/hooks/useComposerAutocompleteState";
@@ -56,6 +57,13 @@ type WorkspaceHomeProps = {
   modelSelections: Record<string, number>;
   onToggleModel: (modelId: string) => void;
   onModelCountChange: (modelId: string, count: number) => void;
+  collaborationModes: { id: string; label: string }[];
+  selectedCollaborationModeId: string | null;
+  onSelectCollaborationMode: (id: string | null) => void;
+  reasoningOptions: string[];
+  selectedEffort: string | null;
+  onSelectEffort: (effort: string) => void;
+  reasoningSupported: boolean;
   error: string | null;
   isSubmitting: boolean;
   activeWorkspaceId: string | null;
@@ -124,6 +132,13 @@ export function WorkspaceHome({
   modelSelections,
   onToggleModel,
   onModelCountChange,
+  collaborationModes,
+  selectedCollaborationModeId,
+  onSelectCollaborationMode,
+  reasoningOptions,
+  selectedEffort,
+  onSelectEffort,
+  reasoningSupported,
   error,
   isSubmitting,
   activeWorkspaceId,
@@ -671,6 +686,83 @@ export function WorkspaceHome({
             </div>
           )}
         </div>
+        {collaborationModes.length > 0 && (
+          <div className="composer-select-wrap workspace-home-control">
+            <div className="open-app-button">
+              <span className="composer-icon" aria-hidden>
+                <svg viewBox="0 0 24 24" fill="none">
+                  <path
+                    d="M7 7h10M7 12h6M7 17h8"
+                    stroke="currentColor"
+                    strokeWidth="1.4"
+                    strokeLinecap="round"
+                  />
+                </svg>
+              </span>
+              <select
+                className="composer-select composer-select--model"
+                aria-label="Collaboration mode"
+                value={selectedCollaborationModeId ?? ""}
+                onChange={(event) =>
+                  onSelectCollaborationMode(event.target.value || null)
+                }
+                disabled={isSubmitting}
+              >
+                {collaborationModes.map((mode) => (
+                  <option key={mode.id} value={mode.id}>
+                    {formatCollaborationModeLabel(mode.label || mode.id)}
+                  </option>
+                ))}
+              </select>
+            </div>
+          </div>
+        )}
+        <div className="composer-select-wrap workspace-home-control">
+          <div className="open-app-button">
+            <span className="composer-icon" aria-hidden>
+              <svg viewBox="0 0 24 24" fill="none">
+                <path
+                  d="M8.5 4.5a3.5 3.5 0 0 0-3.46 4.03A4 4 0 0 0 6 16.5h2"
+                  stroke="currentColor"
+                  strokeWidth="1.4"
+                  strokeLinecap="round"
+                />
+                <path
+                  d="M15.5 4.5a3.5 3.5 0 0 1 3.46 4.03A4 4 0 0 1 18 16.5h-2"
+                  stroke="currentColor"
+                  strokeWidth="1.4"
+                  strokeLinecap="round"
+                />
+                <path
+                  d="M9 12h6"
+                  stroke="currentColor"
+                  strokeWidth="1.4"
+                  strokeLinecap="round"
+                />
+                <path
+                  d="M12 12v6"
+                  stroke="currentColor"
+                  strokeWidth="1.4"
+                  strokeLinecap="round"
+                />
+              </svg>
+            </span>
+            <select
+              className="composer-select composer-select--effort"
+              aria-label="Thinking mode"
+              value={selectedEffort ?? ""}
+              onChange={(event) => onSelectEffort(event.target.value)}
+              disabled={isSubmitting || !reasoningSupported}
+            >
+              {reasoningOptions.length === 0 && <option value="">Default</option>}
+              {reasoningOptions.map((effortOption) => (
+                <option key={effortOption} value={effortOption}>
+                  {effortOption}
+                </option>
+              ))}
+            </select>
+          </div>
+        </div>
       </div>
 
       <div className="workspace-home-agent">
diff --git a/src/features/workspaces/hooks/useWorkspaceHome.ts b/src/features/workspaces/hooks/useWorkspaceHome.ts
index bff80e61..297874bc 100644
--- a/src/features/workspaces/hooks/useWorkspaceHome.ts
+++ b/src/features/workspaces/hooks/useWorkspaceHome.ts
@@ -30,6 +30,8 @@ type UseWorkspaceHomeOptions = {
   activeWorkspace: WorkspaceInfo | null;
   models: ModelOption[];
   selectedModelId: string | null;
+  effort?: string | null;
+  collaborationMode?: Record<string, unknown> | null;
   addWorktreeAgent: (
     workspace: WorkspaceInfo,
     branch: string,
@@ -45,7 +47,11 @@ type UseWorkspaceHomeOptions = {
     threadId: string,
     text: string,
     images?: string[],
-    options?: { model?: string | null; effort?: string | null },
+    options?: {
+      model?: string | null;
+      effort?: string | null;
+      collaborationMode?: Record<string, unknown> | null;
+    },
   ) => Promise<void>;
   onWorktreeCreated?: (worktree: WorkspaceInfo, parent: WorkspaceInfo) => Promise<void> | void;
 };
@@ -166,6 +172,8 @@ export function useWorkspaceHome({
   activeWorkspace,
   models,
   selectedModelId,
+  effort = null,
+  collaborationMode = null,
   addWorktreeAgent,
   connectWorkspace,
   startThreadForWorkspace,
@@ -469,6 +477,8 @@ export function useWorkspaceHome({
             : null;
           await sendUserMessageToThread(activeWorkspace, threadId, prompt, images, {
             model: localModel,
+            effort,
+            collaborationMode,
           });
           const model =
             selectedModelId ? modelLookup.get(selectedModelId) ?? null : null;
@@ -530,7 +540,8 @@ export function useWorkspaceHome({
                 images,
                 {
                   model: selection.model?.model ?? selection.modelId,
-                  effort: null,
+                  effort,
+                  collaborationMode,
                 },
               );
               instances.push({
@@ -580,9 +591,11 @@ export function useWorkspaceHome({
     activeWorkspace,
     activeWorkspaceId,
     addWorktreeAgent,
+    collaborationMode,
     connectWorkspace,
     onWorktreeCreated,
     draft,
+    effort,
     isSubmitting,
     modelLookup,
     modelSelections,
diff --git a/src/styles/composer.css b/src/styles/composer.css
index 223ab23b..13f18e6d 100644
--- a/src/styles/composer.css
+++ b/src/styles/composer.css
@@ -661,13 +661,13 @@
 }
 
 .composer-select--collab {
-  width: 88px;
-  max-width: 88px;
+  width: 110px;
+  max-width: 110px;
 }
 
 .composer-select--effort {
-  width: 60px;
-  max-width: 60px;
+  width: 80px;
+  max-width: 80px;
 }
 
 .composer-select--approval {
diff --git a/src/styles/workspace-home.css b/src/styles/workspace-home.css
index d5a91b35..fd1dc5d9 100644
--- a/src/styles/workspace-home.css
+++ b/src/styles/workspace-home.css
@@ -162,6 +162,29 @@
   background: var(--surface-card);
 }
 
+.workspace-home-control.composer-select-wrap {
+  padding: 0;
+  background: transparent;
+  border: none;
+  border-radius: 0;
+  min-height: 0;
+}
+
+.workspace-home-control.composer-select-wrap .open-app-button {
+  border-color: var(--border-muted);
+  background: var(--surface-card);
+  border-radius: 10px;
+  padding: 6px 10px;
+  align-items: center;
+  gap: 6px;
+}
+
+.workspace-home-control.composer-select-wrap .composer-select {
+  font-size: 12px;
+  color: var(--text-stronger);
+  padding: 0 16px 0 0;
+}
+
 .workspace-home-dropdown {
   left: 0;
 }