Fix Windows AI model selection

Fix the Windows issue where AI models could not be selected.

components/AIChatSidePanelHelpers.ts

@@ -22,7 +22,9 @@ export function isCopilotAgentConfig(agent?: ExternalAgentConfig): boolean {
     getExternalAgentSdkBackend(agent),
   ]
     .filter((value): value is string => typeof value === 'string' && value.length > 0)
-    .map((value) => value.split('/').pop()?.toLowerCase() ?? value.toLowerCase());
+    // Split on both separators so Windows command paths (e.g. "...\\copilot.exe")
+    // reduce to their basename rather than staying as the full path.
+    .map((value) => value.split(/[\\/]/).pop()?.toLowerCase() ?? value.toLowerCase());
   return tokens.some((token) => token.includes('copilot'));
 }
 

infrastructure/ai/types.test.ts

@@ -2,6 +2,7 @@ import test from 'node:test';
 import assert from 'node:assert/strict';
 
 import {
+  CLAUDE_MODEL_PRESETS,
   CODEBUDDY_MODEL_PRESETS,
   CODEX_MODEL_PRESETS,
   getAgentModelPresets,
@@ -19,3 +20,14 @@ test('getAgentModelPresets keeps Codex presets separate from CodeBuddy presets',
   assert.deepEqual(getAgentModelPresets('codex'), CODEX_MODEL_PRESETS);
   assert.notDeepEqual(CODEBUDDY_MODEL_PRESETS, CODEX_MODEL_PRESETS);
 });
+
+test('getAgentModelPresets resolves Windows command paths with backslashes', () => {
+  assert.deepEqual(
+    getAgentModelPresets('C\\Users\\foo\\AppData\\Roaming\\npm\\codex.cmd'),
+    CODEX_MODEL_PRESETS,
+  );
+  assert.deepEqual(
+    getAgentModelPresets('C\\Program Files\\nodejs\\claude.exe'),
+    CLAUDE_MODEL_PRESETS,
+  );
+});

infrastructure/ai/types.ts

@@ -477,7 +477,11 @@ export const CODEBUDDY_MODEL_PRESETS: AgentModelPreset[] = [
 
 export function getAgentModelPresets(agentCommand?: string): AgentModelPreset[] {
   if (!agentCommand) return [];
-  const basename = agentCommand.split('/').pop()?.toLowerCase() ?? '';
+  // Split on both POSIX (/) and Windows (\) separators so command paths like
+  // "C:\\Users\\foo\\codex.cmd" resolve to the right basename. Splitting only
+  // on "/" leaves the full path intact on Windows, which never matches the
+  // preset prefixes below and yields an empty list (presets silently lost).
+  const basename = agentCommand.split(/[\\/]/).pop()?.toLowerCase() ?? '';
   if (basename.startsWith('claude')) return CLAUDE_MODEL_PRESETS;
   if (basename.startsWith('codex')) return CODEX_MODEL_PRESETS;
   if (basename.startsWith('cursor')) return CURSOR_MODEL_PRESETS;

package-lock.json

@@ -32,6 +32,7 @@
         "@radix-ui/react-tooltip": "^1.2.8",
         "@streamdown/cjk": "^1.0.2",
         "@streamdown/code": "^1.1.0",
+        "@tencent-ai/agent-sdk": "^0.3.173",
         "@withfig/autocomplete": "^2.692.3",
         "@xterm/addon-fit": "^0.11.0",
         "@xterm/addon-search": "^0.16.0",
@@ -90,7 +91,7 @@
         "@anthropic-ai/claude-agent-sdk": "^0.3.161",
         "@cursor/sdk": "^1.0.18",
         "@github/copilot-sdk": "1.0.0",
-        "@tencent-ai/agent-sdk": "^0.3.169",
+        "@tencent-ai/agent-sdk": "^0.3.173",
         "@vscode/windows-process-tree": "^0.7.0"
       }
     },
@@ -6496,20 +6497,10 @@
         "vite": "^5.2.0 || ^6 || ^7"
       }
     },
-    "node_modules/@tootallnate/once": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
-      "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
-      "license": "MIT",
-      "optional": true,
-      "engines": {
-        "node": ">= 6"
-      }
-    },
     "node_modules/@tencent-ai/agent-sdk": {
-      "version": "0.3.169",
-      "resolved": "https://registry.npmjs.org/@tencent-ai/agent-sdk/-/agent-sdk-0.3.169.tgz",
-      "integrity": "sha512-iwMbrV+7KzMRjDTZPwz9VAIxokDJ1ybOY58YODSCgrsh/2cILFWl8jhMElpZScS3zsUb5IvB2xbaXhxtIEqKBw==",
+      "version": "0.3.173",
+      "resolved": "https://registry.npmjs.org/@tencent-ai/agent-sdk/-/agent-sdk-0.3.173.tgz",
+      "integrity": "sha512-8aAZhQ1pMhcAdsPrLpk93abGMQGVdm3kf6WGMLgf1TJLW/YrHskJeOxFCCqkxyx3SLu68hi2h9EcyvQEPcta6Q==",
       "license": "MIT",
       "optional": true,
       "dependencies": {
@@ -6520,6 +6511,16 @@
         "zod": "^4.0.0"
       }
     },
+    "node_modules/@tootallnate/once": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
+      "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",

package.json

@@ -115,7 +115,7 @@
     "@anthropic-ai/claude-agent-sdk": "^0.3.161",
     "@cursor/sdk": "^1.0.18",
     "@github/copilot-sdk": "1.0.0",
-    "@tencent-ai/agent-sdk": "^0.3.169",
+    "@tencent-ai/agent-sdk": "^0.3.173",
     "@vscode/windows-process-tree": "^0.7.0"
   },
   "overrides": {