fix: add missing chatgptModels.ts, xhigh type support, and tsconfig fixes

src/commands/effort/effort.tsx

@@ -169,7 +169,7 @@ export async function call(
 
   if (COMMON_HELP_ARGS.includes(args)) {
     onDone(
-      'Usage: /effort [low|medium|high|max|auto]\n\nEffort levels:\n- low: Quick, straightforward implementation\n- medium: Balanced approach with standard testing\n- high: Comprehensive implementation with extensive testing\n- max: Maximum capability with deepest reasoning\n- auto: Use the default effort level for your model',
+      'Usage: /effort [low|medium|high|max|xhigh|auto]\\n\\nEffort levels:\\n- low: Quick, straightforward implementation\\n- medium: Balanced approach with standard testing\\n- high: Comprehensive implementation with extensive testing\\n- xhigh: Extended reasoning beyond high\\n- max: Maximum capability with deepest reasoning\\n- auto: Use the default effort level for your model',
     )
     return
   }

src/entrypoints/sdk/runtimeTypes.ts

@@ -60,4 +60,4 @@ export interface Query {
 export interface InternalQuery extends Query {
   [key: string]: unknown
 }
-export type EffortLevel = 'low' | 'medium' | 'high' | 'max';
+export type EffortLevel = 'low' | 'medium' | 'high' | 'max' | 'xhigh';

src/utils/model/chatgptModels.ts

@@ -0,0 +1,54 @@
+export type ChatGPTCodexModelOption = {
+  value: string
+  label: string
+  description: string
+}
+
+export const CHATGPT_CODEX_DEFAULT_MODEL = 'gpt-5.5'
+export const CHATGPT_CODEX_FAST_MODEL = 'gpt-5.4-mini'
+
+export const CHATGPT_CODEX_MODEL_OPTIONS: ChatGPTCodexModelOption[] = [
+  {
+    value: 'gpt-5.5',
+    label: 'GPT-5.5',
+    description:
+      'Frontier model for complex coding, research, and real-world work',
+  },
+  {
+    value: 'gpt-5.4',
+    label: 'GPT-5.4',
+    description: 'Strong model for everyday coding',
+  },
+  {
+    value: 'gpt-5.4-mini',
+    label: 'GPT-5.4-Mini',
+    description:
+      'Small, fast, and cost-efficient model for simpler coding tasks',
+  },
+  {
+    value: 'gpt-5.3-codex',
+    label: 'GPT-5.3-Codex',
+    description: 'Coding-optimized model',
+  },
+  {
+    value: 'gpt-5.3-codex-spark',
+    label: 'GPT-5.3-Codex-Spark',
+    description: 'Ultra-fast coding model',
+  },
+  {
+    value: 'gpt-5.2',
+    label: 'GPT-5.2',
+    description: 'Optimized for professional work and long-running agents',
+  },
+]
+
+export function isChatGPTAuthMode(): boolean {
+  return process.env.OPENAI_AUTH_MODE === 'chatgpt'
+}
+
+export function isChatGPTCodexReasoningModel(model: string): boolean {
+  const normalized = model.toLowerCase().replace(/\[1m\]$/, '')
+  return CHATGPT_CODEX_MODEL_OPTIONS.some(
+    option => option.value.toLowerCase() === normalized,
+  )
+}