fix(config): preserve disabled arrays during partial parsing

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/plugin-config.ts

@@ -11,6 +11,15 @@ import {
   migrateConfigFile,
 } from "./shared";
 
+const PARTIAL_STRING_ARRAY_KEYS = new Set([
+  "disabled_mcps",
+  "disabled_agents",
+  "disabled_skills",
+  "disabled_hooks",
+  "disabled_commands",
+  "disabled_tools",
+]);
+
 export function parseConfigPartially(
   rawConfig: Record<string, unknown>
 ): OhMyOpenCodeConfig | null {
@@ -23,6 +32,14 @@ export function parseConfigPartially(
   const invalidSections: string[] = [];
 
   for (const key of Object.keys(rawConfig)) {
+    if (PARTIAL_STRING_ARRAY_KEYS.has(key)) {
+      const sectionValue = rawConfig[key];
+      if (Array.isArray(sectionValue) && sectionValue.every((value) => typeof value === "string")) {
+        partialConfig[key] = sectionValue;
+      }
+      continue;
+    }
+
     const sectionResult = OhMyOpenCodeConfigSchema.safeParse({ [key]: rawConfig[key] });
     if (sectionResult.success) {
       const parsed = sectionResult.data as Record<string, unknown>;