diff --git a/crates/buzz-acp/src/acp.rs b/crates/buzz-acp/src/acp.rs
index b553adaabb..cd580a324b 100644
--- a/crates/buzz-acp/src/acp.rs
+++ b/crates/buzz-acp/src/acp.rs
@@ -466,6 +466,17 @@ impl AcpClient {
         #[cfg(unix)]
         cmd.process_group(0);
 
+        // Windows: the desktop layer spawns THIS harness with CREATE_NO_WINDOW
+        // (see managed_agents/runtime.rs), so buzz-acp has no console to share.
+        // Without the same flag here, every console-subsystem agent child — the
+        // `claude-agent-acp`/`goose` cmd-shim, node, `claude.exe` — gets a fresh
+        // visible console window that lingers. Mirror the desktop's suppression.
+        #[cfg(windows)]
+        {
+            const CREATE_NO_WINDOW: u32 = 0x0800_0000;
+            cmd.creation_flags(CREATE_NO_WINDOW);
+        }
+
         let mut child = cmd.spawn()?;
 
         let stdin = child
diff --git a/crates/buzz-agent/src/mcp.rs b/crates/buzz-agent/src/mcp.rs
index 71c3193a06..3629f889bf 100644
--- a/crates/buzz-agent/src/mcp.rs
+++ b/crates/buzz-agent/src/mcp.rs
@@ -732,6 +732,16 @@ async fn spawn_one(
     #[cfg(unix)]
     cmd.process_group(0);
 
+    // Windows: the desktop spawns the agent with CREATE_NO_WINDOW, so buzz-agent has no console
+    // to share. Without the same flag here, every console-subsystem MCP server child — a `node`
+    // stdio server, a cmd shim — gets a fresh visible console window that lingers. Mirror the
+    // desktop's suppression at the MCP spawn, alongside the existing #[cfg(unix)] process_group(0).
+    #[cfg(windows)]
+    {
+        const CREATE_NO_WINDOW: u32 = 0x0800_0000;
+        cmd.creation_flags(CREATE_NO_WINDOW);
+    }
+
     let transport = TokioChildProcess::new(cmd)
         .map_err(|e| AgentError::Mcp(format!("spawn {}: {e}", spec.name)))?;
     let pgid = transport.id();