fix(cursor): export missing symbols, eliminate subcommand sync risk, improve tests

- Export detectProvider and formatModelName from barrel index
- Export CURSOR_SUBCOMMANDS from cursor-command.ts, import in ccs.ts
- Use getCcsDir() in tests instead of manual path construction
- Add handleCursorCommand routing test for unknown subcommand

src/ccs.ts

@@ -536,13 +536,15 @@ async function main(): Promise<void> {
   // Only route to command handler for known subcommands, otherwise treat as profile
   // Note: Bare `ccs cursor` shows help (unlike copilot which falls through to profile)
   // This is intentional — cursor has no profile-switching mode
-  // Keep in sync with cursor-command.ts switch cases
-  const CURSOR_SUBCOMMANDS = ['auth', 'status', 'models', 'start', 'stop', 'help', '--help', '-h'];
-  if (firstArg === 'cursor' && (args.length === 1 || CURSOR_SUBCOMMANDS.includes(args[1]))) {
-    // `ccs cursor <subcommand>` - route to cursor command handler
-    const { handleCursorCommand } = await import('./commands/cursor-command');
-    const exitCode = await handleCursorCommand(args.slice(1));
-    process.exit(exitCode);
+  if (firstArg === 'cursor') {
+    const { handleCursorCommand, CURSOR_SUBCOMMANDS } = await import('./commands/cursor-command');
+    if (
+      args.length === 1 ||
+      CURSOR_SUBCOMMANDS.includes(args[1] as (typeof CURSOR_SUBCOMMANDS)[number])
+    ) {
+      const exitCode = await handleCursorCommand(args.slice(1));
+      process.exit(exitCode);
+    }
   }
 
   // Special case: copilot command (GitHub Copilot integration)

src/commands/cursor-command.ts

@@ -23,6 +23,18 @@ const DEFAULT_CURSOR_CONFIG = {
   model: DEFAULT_CURSOR_MODEL,
 };
 
+/** Valid cursor subcommands — imported by ccs.ts for routing */
+export const CURSOR_SUBCOMMANDS = [
+  'auth',
+  'status',
+  'models',
+  'start',
+  'stop',
+  'help',
+  '--help',
+  '-h',
+] as const;
+
 /**
  * Handle cursor subcommand.
  */

src/cursor/index.ts

@@ -29,6 +29,8 @@ export {
   fetchModelsFromDaemon,
   getAvailableModels,
   getDefaultModel,
+  detectProvider,
+  formatModelName,
 } from './cursor-models';
 
 // Executor