Fix setTheme not triggering rerender, improve mac-system-theme example

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- `setTheme()` now triggers a full rerender so previously rendered components update with the new theme colors
+- `mac-system-theme.ts` example now polls every 2 seconds and uses `osascript` for real-time macOS appearance detection
+
 ## [0.39.0] - 2026-01-08
 
 ### Breaking Changes

packages/coding-agent/examples/extensions/mac-system-theme.ts

@@ -10,10 +10,13 @@ import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
 
 function isDarkMode(): boolean {
 	try {
-		execSync("defaults read -g AppleInterfaceStyle", { encoding: "utf-8" });
-		return true; // Returns "Dark" if dark mode
+		const result = execSync(
+			"osascript -e 'tell application \"System Events\" to tell appearance preferences to return dark mode'",
+			{ encoding: "utf-8" },
+		);
+		return result.trim() === "true";
 	} catch {
-		return false; // Throws if light mode
+		return false;
 	}
 }
 

packages/coding-agent/src/modes/interactive/theme/theme.ts

@@ -621,6 +621,9 @@ export function setTheme(name: string, enableWatcher: boolean = false): { succes
 		if (enableWatcher) {
 			startThemeWatcher();
 		}
+		if (onThemeChangeCallback) {
+			onThemeChangeCallback();
+		}
 		return { success: true };
 	} catch (error) {
 		// Theme is invalid - fall back to dark theme
@@ -638,6 +641,9 @@ export function setThemeInstance(themeInstance: Theme): void {
 	theme = themeInstance;
 	currentThemeName = "<in-memory>";
 	stopThemeWatcher(); // Can't watch a direct instance
+	if (onThemeChangeCallback) {
+		onThemeChangeCallback();
+	}
 }
 
 export function onThemeChange(callback: () => void): void {