react-native-executorch/lib/module/utils/llms/context_strategy/NoopContextStrategy.js

An easy way to run AI models in React Native with ExecuTorch

"use strict";

/**
 * A context strategy that performs no filtering or trimming of the message history.
 * This strategy is ideal when the developer wants to manually manage the conversation
 * context.
 * @category Utils
 */
export class NoopContextStrategy {
  /**
   * Builds the context by prepending the system prompt to the entire unfiltered history.
   * @param systemPrompt - The top-level instructions for the model.
   * @param history - The complete conversation history.
   * @param _maxContextLength - Unused in this strategy.
   * @param _getTokenCount - Unused in this strategy.
   * @returns The unedited message history with the system prompt at the beginning.
   */
  buildContext(systemPrompt, history, _maxContextLength, _getTokenCount) {
    return [{
      content: systemPrompt,
      role: 'system'
    }, ...history];
  }
}
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