Function processSlashCommand

src/utils/processUserInput/processSlashCommand.tsx:309–524

(inputString: string, precedingInputBlocks: ContentBlockParam[], imageContentBlocks: ContentBlockParam[], attachmentMessages: AttachmentMessage[], context: ProcessUserInputContext, setToolJSX: SetToolJSXFn, uuid?: string, isAlreadyProcessing?: boolean, canUseTool?: CanUseToolFn)

  return !/[^a-zA-Z0-9:\-_]/.test(commandName);
}
export async function processSlashCommand(inputString: string, precedingInputBlocks: ContentBlockParam[], imageContentBlocks: ContentBlockParam[], attachmentMessages: AttachmentMessage[], context: ProcessUserInputContext, setToolJSX: SetToolJSXFn, uuid?: string, isAlreadyProcessing?: boolean, canUseTool?: CanUseToolFn): Promise<ProcessUserInputBaseResult> {
  const parsed = parseSlashCommand(inputString);
  if (!parsed) {
    logEvent('tengu_input_slash_missing', {});
    const errorMessage = 'Commands are in the form `/command [args]`';
    return {
      messages: [createSyntheticUserCaveatMessage(), ...attachmentMessages, createUserMessage({
        content: prepareUserContent({
          inputString: errorMessage,
          precedingInputBlocks
        })
      })],
      shouldQuery: false,
      resultText: errorMessage
    };
  }
  const {
    commandName,
    args: parsedArgs,
    isMcp
  } = parsed;
  const sanitizedCommandName = isMcp ? 'mcp' : !builtInCommandNames().has(commandName) ? 'custom' : commandName;

  // Check if it's a real command before processing
  if (!hasCommand(commandName, context.options.commands)) {
    // Check if this looks like a command name vs a file path or other input
    // Also check if it's an actual file path that exists
    let isFilePath = false;
    try {
      await getFsImplementation().stat(`/${commandName}`);
      isFilePath = true;
    } catch {
      // Not a file path — treat as command name
    }
    if (looksLikeCommand(commandName) && !isFilePath) {
      logEvent('tengu_input_slash_invalid', {
        input: commandName as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS
      });
      const unknownMessage = `Unknown skill: ${commandName}`;
      return {
        messages: [createSyntheticUserCaveatMessage(), ...attachmentMessages, createUserMessage({
          content: prepareUserContent({
            inputString: unknownMessage,
            precedingInputBlocks
          })
        }),
        // gh-32591: preserve args so the user can copy/resubmit without
        // retyping. System warning is UI-only (filtered before API).
        ...(parsedArgs ? [createSystemMessage(`Args from unknown skill: ${parsedArgs}`, 'warning')] : [])],
        shouldQuery: false,
        resultText: unknownMessage
      };
    }
    const promptId = randomUUID();
    setPromptId(promptId);
    logEvent('tengu_input_prompt', {});
    // Log user prompt event for OTLP
    void logOTelEvent('user_prompt', {