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path: root/packages/cli/src/services/prompt-processors/argumentProcessor.ts
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/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { IPromptProcessor, SHORTHAND_ARGS_PLACEHOLDER } from './types.js';
import { CommandContext } from '../../ui/commands/types.js';

/**
 * Replaces all instances of `{{args}}` in a prompt with the user-provided
 * argument string.
 */
export class ShorthandArgumentProcessor implements IPromptProcessor {
  async process(prompt: string, context: CommandContext): Promise<string> {
    return prompt.replaceAll(
      SHORTHAND_ARGS_PLACEHOLDER,
      context.invocation!.args,
    );
  }
}

/**
 * Appends the user's full command invocation to the prompt if arguments are
 * provided, allowing the model to perform its own argument parsing.
 */
export class DefaultArgumentProcessor implements IPromptProcessor {
  async process(prompt: string, context: CommandContext): Promise<string> {
    if (context.invocation!.args) {
      return `${prompt}\n\n${context.invocation!.raw}`;
    }
    return prompt;
  }
}