fix: fixed #11 schema normalization, #10 version parsing, and variable declarations

- Fixed schema normalization in Google provider to handle array-valued type fields by converting them to single type with nullable flag.
- Refactored version parsing in install script to use bash parameter expansion instead of IFS field splitting.
- Changed variable declarations from let to var in theme module global scope.

packages/ai/CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 
 ## [Unreleased]
+### Fixed
+
+- Fixed schema normalization to handle array-valued `type` fields by converting them to a single type with nullable flag for Google provider compatibility
 
 ## [11.3.0] - 2026-02-06
 ### Added

packages/ai/src/providers/google-shared.ts

@@ -332,6 +332,17 @@ function sanitizeSchemaImpl(value: unknown, isInsideProperties: boolean): unknow
 		result[key] = sanitizeSchemaImpl(entry, key === "properties");
 	}
 
+	// Normalize array-valued "type" (e.g. ["string", "null"]) to a single type + nullable.
+	// Google's Schema proto expects type to be a single enum string, not an array.
+	if (Array.isArray(result.type)) {
+		const types = result.type as string[];
+		const nonNull = types.filter(t => t !== "null");
+		if (types.includes("null")) {
+			result.nullable = true;
+		}
+		result.type = nonNull[0] ?? types[0];
+	}
+
 	if (constValue !== undefined) {
 		// Convert const to enum, merging with existing enum if present
 		const existingEnum = Array.isArray(result.enum) ? result.enum : [];

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

@@ -1724,12 +1724,12 @@ function getDefaultTheme(): string {
 // Global Theme Instance
 // ============================================================================
 
-export let theme: Theme;
-let currentThemeName: string | undefined;
-let currentSymbolPresetOverride: SymbolPreset | undefined;
-let currentColorBlindMode: boolean = false;
-let themeWatcher: fs.FSWatcher | undefined;
-let onThemeChangeCallback: (() => void) | undefined;
+export var theme: Theme;
+var currentThemeName: string | undefined;
+var currentSymbolPresetOverride: SymbolPreset | undefined;
+var currentColorBlindMode: boolean = false;
+var themeWatcher: fs.FSWatcher | undefined;
+var onThemeChangeCallback: (() => void) | undefined;
 
 function getCurrentThemeOptions(): CreateThemeOptions {
 	return {

scripts/install.sh

@@ -75,15 +75,17 @@ version_ge() {
     current="$1"
     minimum="$2"
 
-    IFS=. set -- $current
-    current_major=${1:-0}
-    current_minor=${2:-0}
-    current_patch=${3:-0}
+    current_major="${current%%.*}"
+    current_rest="${current#*.}"
+    current_minor="${current_rest%%.*}"
+    current_patch="${current_rest#*.}"
+    current_patch="${current_patch%%.*}"
 
-    IFS=. set -- $minimum
-    minimum_major=${1:-0}
-    minimum_minor=${2:-0}
-    minimum_patch=${3:-0}
+    minimum_major="${minimum%%.*}"
+    minimum_rest="${minimum#*.}"
+    minimum_minor="${minimum_rest%%.*}"
+    minimum_patch="${minimum_rest#*.}"
+    minimum_patch="${minimum_patch%%.*}"
 
     if [ "$current_major" -ne "$minimum_major" ]; then
         [ "$current_major" -gt "$minimum_major" ]