Method FindAndReplace

pkg/memory/working.go:212–240

FindAndReplace 在现有内容中查找并替换（实验性功能，对标 Mastra） searchString: 要查找的字符串 newContent: 替换后的新内容 如果 searchString 为空，则追加到末尾

(ctx context.Context, threadID, resourceID, searchString, newContent string)

// newContent: 替换后的新内容
// 如果 searchString 为空，则追加到末尾
func (wm *WorkingMemoryManager) FindAndReplace(ctx context.Context, threadID, resourceID, searchString, newContent string) error {
	if threadID == "" && resourceID == "" {
		return errors.New("threadID and resourceID cannot both be empty")
	}

	// 读取现有内容
	existing, err := wm.Get(ctx, threadID, resourceID)
	if err != nil {
		return fmt.Errorf("read existing content: %w", err)
	}

	var updated string
	if searchString == "" || existing == "" {
		// 追加模式
		if existing == "" {
			updated = newContent
		} else {
			updated = existing + "\n\n" + newContent
		}
	} else {
		// 查找替换模式
		if !strings.Contains(existing, searchString) {
			return errors.New("search string not found in working memory")
		}
		updated = strings.Replace(existing, searchString, newContent, 1)
	}

	return wm.Update(ctx, threadID, resourceID, updated)
}

// Delete 删除 Working Memory
func (wm *WorkingMemoryManager) Delete(ctx context.Context, threadID, resourceID string) error {