mastra-ai/mastra · info · CreateCancelledError

CreateCancelledError

Error message

CreateCancelledError

What it means

`runCreatePrompt` in packages/cli/src/commands/create/create.ts:128 races each interactive prompt against a cancellation promise. If the user cancels the prompt (clack returns a cancel symbol) or SIGINT arrives, `announceCancellation()` runs and a `CreateCancelledError` is thrown. This keeps all interactive steps (project name, provider, API key, template selection) abortable and consistent.

Source

Thrown at packages/cli/src/commands/create/create.ts:128

    if (cancellationAnnounced) return;
    cancellationAnnounced = true;
    p.cancel('Operation cancelled');
  };
  const cancellation = new Promise<never>((_resolve, reject) => {
    rejectCancellation = reject;
  });
  const abort = () => {
    controller.abort();
    announceCancellation();
    rejectCancellation(new CreateCancelledError());
  };
  process.once('SIGINT', abort);

  try {
    const value = await Promise.race([prompt(controller.signal), cancellation]);
    if (p.isCancel(value)) {
      announceCancellation();
      throw new CreateCancelledError();
    }
    return value;
  } finally {
    process.removeListener('SIGINT', abort);
  }
}

async function promptForProjectName(): Promise<string> {
  return runCreatePrompt(signal =>
    p.text({
      message: 'What do you want to name your project?',
      placeholder: 'my-mastra-app',
      signal,
      validate: value => {
        if (!value || value.length === 0) return `Project name can't be empty`;
        if (fsSync.existsSync(value)) {
          return `A directory named "${value}" already exists. Please choose a different name.`;
        }

View on GitHub (pinned to 75dd419e61)

Solutions

1. Re-run `mastra create` and answer the prompts to completion
2. If you lack an API key, pass `--llm-api-key` (default flow only) to skip that prompt
3. Avoid pressing Esc/Ctrl+C in prompts; use the provided defaults
4. In automation, provide projectName/provider via CLI args so fewer prompts appear

function isCreateCancelled(e: unknown): e is CreateCancelledError {
  return e instanceof CreateCancelledError;
}

try {
  await create({}); // fully interactive
} catch (error) {
  if (isCreateCancelledError(error)) {
    console.log('Setup aborted by user; re-run mastra create anytime');
    return;
  }
  throw error;
}

When it happens

Trigger: Pressing Ctrl+C or Esc during promptForProjectName, promptForProvider, promptForApiKey, or selectTemplate — clack's isCancel(value) becomes true and the error is thrown; SIGINT also rejects via the abort handler.

Common situations: User abandons setup because they lack an API key; terminal interrupt forwarded from a parent process; accidental Esc in the select list; answering 'cancel' on the clack confirm.

Related errors

• CreateCancelledError (Operation cancelled)
• Invalid --region "${region}". Expected one of: eu, us.
• ${err instanceof Error ? err.message : String(err)}\nYou can
• No organization matched --org "${value}". Available: ${avail
• Directory ${path.basename(targetPath)} already exists

AI-assisted analysis of mastra-ai/mastra@75dd419e61 (2026-08-30). Data as JSON: /api/errors/b30e2d245e26d68f. Report an issue: GitHub.