feat(cliproxy): deprecate claude thinking models in agy provider

Deprecated 2 Claude thinking models:
- gemini-claude-opus-4-5-thinking
- gemini-claude-sonnet-4-5-thinking

These models have compatibility issues with Antigravity.
A new deprecation system was added with badges and warnings in the UI.

src/cliproxy/model-catalog.ts

@@ -23,6 +23,10 @@ export interface ModelEntry {
   broken?: boolean;
   /** Issue URL for broken models */
   issueUrl?: string;
+  /** Model is deprecated - show warning when selected */
+  deprecated?: boolean;
+  /** Deprecation reason/message */
+  deprecationReason?: string;
 }
 
 /**
@@ -46,16 +50,6 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
     displayName: 'Antigravity',
     defaultModel: 'gemini-3-pro-preview',
     models: [
-      {
-        id: 'gemini-claude-opus-4-5-thinking',
-        name: 'Claude Opus 4.5 Thinking',
-        description: 'Most capable, extended thinking',
-      },
-      {
-        id: 'gemini-claude-sonnet-4-5-thinking',
-        name: 'Claude Sonnet 4.5 Thinking',
-        description: 'Balanced with extended thinking',
-      },
       {
         id: 'gemini-claude-sonnet-4-5',
         name: 'Claude Sonnet 4.5',
@@ -66,6 +60,22 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
         name: 'Gemini 3 Pro',
         description: 'Google latest model via Antigravity',
       },
+      {
+        id: 'gemini-claude-opus-4-5-thinking',
+        name: 'Claude Opus 4.5 Thinking',
+        description: 'Most capable, extended thinking',
+        deprecated: true,
+        deprecationReason:
+          'Thinking models are deprecated due to compatibility issues with Antigravity',
+      },
+      {
+        id: 'gemini-claude-sonnet-4-5-thinking',
+        name: 'Claude Sonnet 4.5 Thinking',
+        description: 'Balanced with extended thinking',
+        deprecated: true,
+        deprecationReason:
+          'Thinking models are deprecated due to compatibility issues with Antigravity',
+      },
     ],
   },
   gemini: {
@@ -126,3 +136,22 @@ export function getModelIssueUrl(provider: CLIProxyProvider, modelId: string): s
   const model = findModel(provider, modelId);
   return model?.issueUrl;
 }
+
+/**
+ * Check if model is deprecated
+ */
+export function isModelDeprecated(provider: CLIProxyProvider, modelId: string): boolean {
+  const model = findModel(provider, modelId);
+  return model?.deprecated === true;
+}
+
+/**
+ * Get deprecation reason for deprecated model
+ */
+export function getModelDeprecationReason(
+  provider: CLIProxyProvider,
+  modelId: string
+): string | undefined {
+  const model = findModel(provider, modelId);
+  return model?.deprecationReason;
+}

src/cliproxy/model-config.ts

@@ -67,7 +67,8 @@ function formatModelOption(model: ModelEntry): string {
   // Tier badge: clarify that "paid" means paid Google account (not free tier)
   const tierBadge = model.tier === 'paid' ? color(' [Paid Tier]', 'warning') : '';
   const brokenBadge = model.broken ? color(' [BROKEN]', 'error') : '';
-  return `${model.name}${tierBadge}${brokenBadge}`;
+  const deprecatedBadge = model.deprecated ? color(' [DEPRECATED]', 'warning') : '';
+  return `${model.name}${tierBadge}${brokenBadge}${deprecatedBadge}`;
 }
 
 /**
@@ -78,8 +79,9 @@ function formatModelDetailed(model: ModelEntry, isCurrent: boolean): string {
   const name = isCurrent ? bold(model.name) : model.name;
   const tierBadge = model.tier === 'paid' ? color(' [Paid Tier]', 'warning') : '';
   const brokenBadge = model.broken ? color(' [BROKEN]', 'error') : '';
+  const deprecatedBadge = model.deprecated ? color(' [DEPRECATED]', 'warning') : '';
   const desc = model.description ? dim(` - ${model.description}`) : '';
-  return `  ${marker} ${name}${tierBadge}${brokenBadge}${desc}`;
+  return `  ${marker} ${name}${tierBadge}${brokenBadge}${deprecatedBadge}${desc}`;
 }
 
 /**
@@ -136,6 +138,7 @@ export async function configureProviderModel(
   console.error(
     dim('    Models marked [Paid Tier] require a paid Google account (not free tier).')
   );
+  console.error(dim('    Models marked [DEPRECATED] are not recommended for use.'));
   console.error('');
 
   // Interactive selection
@@ -211,6 +214,15 @@ export async function configureProviderModel(
   console.error(ok(`Model set to: ${bold(displayName)}`));
   console.error(dim(`     Config saved: ${settingsPath}`));
 
+  // Show deprecation warning if model is deprecated
+  if (selectedEntry?.deprecated) {
+    console.error('');
+    console.error(color('[!] DEPRECATION WARNING', 'warning'));
+    const reason = selectedEntry.deprecationReason || 'This model is deprecated';
+    console.error(dim(`     ${reason}`));
+    console.error(dim('     Consider using a non-deprecated model for better compatibility.'));
+  }
+
   // Show info for Claude models about thinking token limit
   if (isClaude) {
     console.error('');
@@ -261,6 +273,7 @@ export async function showCurrentConfig(provider: CLIProxyProvider): Promise<voi
   console.error('');
   console.error(bold('Available models:'));
   console.error(dim('  [Paid Tier] = Requires paid Google account (not free tier)'));
+  console.error(dim('  [DEPRECATED] = Not recommended for use'));
   console.error('');
   catalog.models.forEach((m) => {
     const isCurrent = m.id === currentModel;