Function SetModelAndClose

src/commands/model/model.tsx:130–232

({
  args,
  onDone
}: {
  args: string;
  onDone: (result?: string, options?: {
    display?: CommandResultDisplay;
  }) => void;
})

  return s.mainLoopModel;
}
function SetModelAndClose({
  args,
  onDone
}: {
  args: string;
  onDone: (result?: string, options?: {
    display?: CommandResultDisplay;
  }) => void;
}): React.ReactNode {
  const isFastMode = useAppState(s => s.fastMode);
  const setAppState = useSetAppState();
  const model = args === 'default' ? null : args;
  React.useEffect(() => {
    async function handleModelChange(): Promise<void> {
      if (model && !isModelAllowed(model)) {
        onDone(`Model '${model}' is not available. Your organization restricts model selection.`, {
          display: 'system'
        });
        return;
      }

      // @[MODEL LAUNCH]: Update check for 1M access.
      if (model && isOpus1mUnavailable(model)) {
        onDone(`Opus 4.6 with 1M context is not available for your account. Learn more: https://code.claude.com/docs/en/model-config#extended-context-with-1m`, {
          display: 'system'
        });
        return;
      }
      if (model && isSonnet1mUnavailable(model)) {
        onDone(`Sonnet 4.6 with 1M context is not available for your account. Learn more: https://code.claude.com/docs/en/model-config#extended-context-with-1m`, {
          display: 'system'
        });
        return;
      }

      // Skip validation for default model
      if (!model) {
        setModel(null);
        return;
      }

      // Skip validation for known aliases - they're predefined and should work
      if (isKnownAlias(model)) {
        setModel(model);
        return;
      }

      // Validate and set custom model
      try {
        // Don't use parseUserSpecifiedModel for non-aliases since it lowercases the input
        // and model names are case-sensitive
        const {
          valid,
          error: error_0
        } = await validateModel(model);
        if (valid) {
          setModel(model);
        } else {