diff --git a/dev-dashboard/backend/src/server.ts b/dev-dashboard/backend/src/server.ts
index c0fd777d37..270e33112b 100644
--- a/dev-dashboard/backend/src/server.ts
+++ b/dev-dashboard/backend/src/server.ts
@@ -4,8 +4,7 @@ import {
   addWorktree,
   removeWorktree,
   openWorktree,
-  closeWorktree,
-  sendPrompt,
+  mergeWorktree,
   readEnvLocal,
   type Profile,
   type Agent,
@@ -226,22 +225,13 @@ async function handleApi(req: Request, url: URL): Promise<Response> {
       return jsonResponse({ message: await openWorktree(name) });
     }
 
-    // POST /api/worktrees/:name/close
-    if (parts[0] === "worktrees" && parts.length === 3 && parts[2] === "close" && method === "POST") {
+    // POST /api/worktrees/:name/merge
+    if (parts[0] === "worktrees" && parts.length === 3 && parts[2] === "merge" && method === "POST") {
       const name = decodeURIComponent(parts[1]);
-      console.log(`[worktree:close] name=${name}`);
-      return jsonResponse({ message: await closeWorktree(name) });
-    }
-
-    // POST /api/worktrees/:name/send
-    if (parts[0] === "worktrees" && parts.length === 3 && parts[2] === "send" && method === "POST") {
-      const name = decodeURIComponent(parts[1]);
-      const body = await req.json() as { prompt?: string };
-      if (!body.prompt) {
-        return errorResponse("prompt is required", 400);
-      }
-      console.log(`[worktree:send] name=${name} prompt="${body.prompt.slice(0, 80)}"`);
-      return jsonResponse({ message: await sendPrompt(name, body.prompt) });
+      console.log(`[worktree:merge] name=${name}`);
+      const result = await mergeWorktree(name);
+      console.log(`[worktree:merge] done name=${name}: ${result}`);
+      return jsonResponse({ message: result });
     }
 
     // GET /api/worktrees/:name/status
diff --git a/dev-dashboard/backend/src/workmux.ts b/dev-dashboard/backend/src/workmux.ts
index 3ae4d33599..edf06628b7 100644
--- a/dev-dashboard/backend/src/workmux.ts
+++ b/dev-dashboard/backend/src/workmux.ts
@@ -239,12 +239,12 @@ export async function openWorktree(name: string): Promise<string> {
   return runChecked(["workmux", "open", name]);
 }
 
-export async function closeWorktree(name: string): Promise<string> {
-  return runChecked(["workmux", "close", name]);
-}
-
-export async function sendPrompt(name: string, prompt: string): Promise<string> {
-  return runChecked(["workmux", "send", name, prompt]);
+export async function mergeWorktree(name: string): Promise<string> {
+  console.log(`[workmux:merge] running: workmux merge ${name}`);
+  stopForwarding(name);
+  const result = await runChecked(["workmux", "merge", name]);
+  console.log(`[workmux:merge] result: ${result}`);
+  return result;
 }
 
 export async function getTmuxSession(): Promise<string> {
diff --git a/dev-dashboard/frontend/src/App.svelte b/dev-dashboard/frontend/src/App.svelte
index 66a720c94c..3aa4a57957 100644
--- a/dev-dashboard/frontend/src/App.svelte
+++ b/dev-dashboard/frontend/src/App.svelte
@@ -13,6 +13,9 @@
   let worktrees = $state<WorktreeInfo[]>([]);
   let selectedBranch = $state<string | null>(null);
   let removeBranch = $state<string | null>(null);
+  let mergeBranch = $state<string | null>(null);
+  let merging = $state(false);
+  let mergeError = $state("");
   let removingBranches = $state<Set<string>>(new Set());
   const SSH_STORAGE_KEY = "wt-ssh-host";
   let showCreateDialog = $state(false);
@@ -84,6 +87,31 @@
     }
   }
 
+  async function handleMerge() {
+    const branch = mergeBranch;
+    if (!branch) return;
+
+    merging = true;
+    mergeError = "";
+    try {
+      await api.mergeWorktree(branch);
+      mergeBranch = null;
+
+      if (selectedBranch === branch) {
+        const idx = visibleWorktrees.findIndex((w) => w.branch === branch);
+        const neighbor = visibleWorktrees[idx - 1] ?? visibleWorktrees[idx + 1];
+        const isNeighborMain = neighbor && (neighbor.path === "(here)" || neighbor.branch === "main");
+        selectedBranch = neighbor && !isNeighborMain ? neighbor.branch : null;
+      }
+
+      await refresh();
+    } catch (err) {
+      mergeError = err instanceof Error ? err.message : String(err);
+    } finally {
+      merging = false;
+    }
+  }
+
   function selectNeighborWorktree(direction: -1 | 1) {
     const selectable = visibleWorktrees.filter(
       (w) => w.path !== "(here)" && w.branch !== "main" && !removingBranches.has(w.branch)
@@ -102,7 +130,7 @@
 
   function handleKeydown(e: KeyboardEvent) {
     // Ignore shortcuts when a dialog is open (let dialog handle its own keys)
-    if (showCreateDialog || removeBranch) return;
+    if (showCreateDialog || removeBranch || mergeBranch) return;
 
     const mod = e.metaKey || e.ctrlKey;
     if (!mod) return;
@@ -157,13 +185,14 @@
       name={selectedBranch}
       worktree={selectedWorktree}
       {sshHost}
+      onmerge={() => { if (selectedBranch) mergeBranch = selectedBranch; }}
       onremove={() => { if (selectedBranch) removeBranch = selectedBranch; }}
       onsettings={() => (showSettingsDialog = true)}
     />
 
     {#if canConnect}
       {#key selectedBranch}
-        <Terminal worktree={selectedBranch} />
+        <Terminal worktree={selectedBranch!} />
       {/key}
     {:else}
       <div class="flex-1 flex items-center justify-center text-muted text-sm">
@@ -195,6 +224,18 @@
   />
 {/if}
 
+{#if mergeBranch}
+  <ConfirmDialog
+    message={`Merge worktree "${mergeBranch}" into main? The worktree will be removed after merging.`}
+    confirmLabel="Merge"
+    variant="accent"
+    loading={merging}
+    error={mergeError}
+    onconfirm={handleMerge}
+    oncancel={() => { mergeBranch = null; mergeError = ""; }}
+  />
+{/if}
+
 {#if showSettingsDialog}
   <SettingsDialog
     onsave={(host) => { sshHost = host; showSettingsDialog = false; }}
diff --git a/dev-dashboard/frontend/src/lib/ConfirmDialog.svelte b/dev-dashboard/frontend/src/lib/ConfirmDialog.svelte
index fa90579d85..c2c0f895bb 100644
--- a/dev-dashboard/frontend/src/lib/ConfirmDialog.svelte
+++ b/dev-dashboard/frontend/src/lib/ConfirmDialog.svelte
@@ -1,7 +1,10 @@
 <script lang="ts">
-  let { message, loading = false, onconfirm, oncancel }: {
+  let { message, loading = false, error = "", confirmLabel = "Remove", variant = "danger", onconfirm, oncancel }: {
     message: string;
     loading?: boolean;
+    error?: string;
+    confirmLabel?: string;
+    variant?: "danger" | "accent";
     onconfirm: () => void;
     oncancel: () => void;
   } = $props();
@@ -19,14 +22,14 @@
   <form method="dialog" onsubmit={(e) => { e.preventDefault(); onconfirm(); }}>
     <h2 class="text-base mb-4">Confirm</h2>
     <p class="text-[13px] text-muted mb-6">{message}</p>
+    {#if error}<p class="text-[12px] text-danger mb-4 -mt-2 whitespace-pre-wrap">{error}</p>{/if}
     <div class="flex justify-end gap-2">
       <button type="button" class={btn} onclick={oncancel} disabled={loading}>Cancel</button>
       <button
-        autofocus
         type="submit"
-        class="{btn} !bg-danger !text-white !border-danger hover:!opacity-90 disabled:!opacity-50 disabled:!cursor-not-allowed flex items-center gap-1.5"
+        class="{btn} !text-white hover:!opacity-90 disabled:!opacity-50 disabled:!cursor-not-allowed flex items-center gap-1.5 {variant === 'accent' ? '!bg-accent !border-accent' : '!bg-danger !border-danger'}"
         disabled={loading}
-      >{#if loading}<span class="spinner"></span>{/if} Remove</button>
+      >{#if loading}<span class="spinner"></span>{/if} {confirmLabel}</button>
     </div>
   </form>
 </dialog>
diff --git a/dev-dashboard/frontend/src/lib/SettingsDialog.svelte b/dev-dashboard/frontend/src/lib/SettingsDialog.svelte
index 83a6512271..93d1ae2723 100644
--- a/dev-dashboard/frontend/src/lib/SettingsDialog.svelte
+++ b/dev-dashboard/frontend/src/lib/SettingsDialog.svelte
@@ -39,7 +39,6 @@
         class="w-full px-2.5 py-1.5 rounded-md border border-edge bg-surface text-primary text-[13px] placeholder:text-muted/50 outline-none focus:border-accent"
         placeholder="e.g. devbox or 10.0.0.5"
         bind:value={sshHost}
-        autofocus
       />
       <p class="text-[11px] text-muted mt-1.5">
         Must match an entry in your local <code class="text-accent/80">~/.ssh/config</code>. Leave empty for local mode.
diff --git a/dev-dashboard/frontend/src/lib/TopBar.svelte b/dev-dashboard/frontend/src/lib/TopBar.svelte
index 1b50e8b6b5..e182e20025 100644
--- a/dev-dashboard/frontend/src/lib/TopBar.svelte
+++ b/dev-dashboard/frontend/src/lib/TopBar.svelte
@@ -1,10 +1,11 @@
 <script lang="ts">
   import type { WorktreeInfo } from "./types";
 
-  let { name, worktree, sshHost, onremove, onsettings }: {
+  let { name, worktree, sshHost, onmerge, onremove, onsettings }: {
     name: string | null;
     worktree: WorktreeInfo | undefined;
     sshHost: string;
+    onmerge: () => void;
     onremove: () => void;
     onsettings: () => void;
   } = $props();
@@ -58,6 +59,7 @@
   {#if name}
     <div class="flex gap-2 items-center">
       <span class="text-xs px-2 py-0.5 rounded-xl bg-hover">{worktree?.status || worktree?.agent || ""}</span>
+      <button class="{btn} !text-accent !border-accent hover:!bg-accent/10" onclick={onmerge} title="Merge worktree">Merge</button>
       <button class="{btn} !text-danger !border-danger hover:!bg-danger/10" onclick={onremove} title="Remove worktree">Remove</button>
     </div>
   {/if}
diff --git a/dev-dashboard/frontend/src/lib/api.ts b/dev-dashboard/frontend/src/lib/api.ts
index fea80ca7de..1b38e89d9b 100644
--- a/dev-dashboard/frontend/src/lib/api.ts
+++ b/dev-dashboard/frontend/src/lib/api.ts
@@ -36,13 +36,6 @@ export function openWorktree(name: string): Promise<unknown> {
   return api(`worktrees/${encodeURIComponent(name)}/open`, { method: "POST" });
 }
 
-export function closeWorktree(name: string): Promise<unknown> {
-  return api(`worktrees/${encodeURIComponent(name)}/close`, { method: "POST" });
-}
-
-export function sendPrompt(name: string, prompt: string): Promise<unknown> {
-  return api(`worktrees/${encodeURIComponent(name)}/send`, {
-    method: "POST",
-    body: JSON.stringify({ prompt }),
-  });
+export function mergeWorktree(name: string): Promise<unknown> {
+  return api(`worktrees/${encodeURIComponent(name)}/merge`, { method: "POST" });
 }