feat(omo): quit with :q, :q!, :qa or :wq

A small extension catches Enter while the editor holds :q, :q!, :qa or :wq and shuts omo down, after the running turn if there is one. It reads the key through onTerminalInput rather than the input event, so typing :q never fires UserPromptSubmit hooks, which used to leave the blue working marker behind. setup-mac.sh links it into ~/.omo/agent/extensions.

.config/omo/extensions/vim-quit.ts

@@ -0,0 +1,27 @@
+// Enter is caught before the editor submits, where omo handles /quit, so :q never fires prompt hooks
+// such as UserPromptSubmit. ctx.shutdown() waits for the agent to go idle, so :q mid-turn quits after it.
+import type { ExtensionAPI } from "@code-yeongyu/senpi";
+import { Key, matchesKey } from "@earendil-works/pi-tui";
+
+const QUIT_COMMANDS = new Set([":q", ":q!", ":qa", ":wq"]);
+
+export default function (pi: ExtensionAPI) {
+	let unsubscribe: (() => void) | undefined;
+
+	pi.on("session_start", (_event, ctx) => {
+		unsubscribe?.();
+		unsubscribe = ctx.ui.onTerminalInput((data) => {
+			if (!matchesKey(data, Key.enter) || !QUIT_COMMANDS.has(ctx.ui.getEditorText().trim())) {
+				return undefined;
+			}
+			ctx.ui.setEditorText("");
+			ctx.shutdown();
+			return { consume: true };
+		});
+	});
+
+	pi.on("session_shutdown", () => {
+		unsubscribe?.();
+		unsubscribe = undefined;
+	});
+}