public void ParseWorkflowTaskPlaceholders(WorkflowTask task, IExpressionParser parser)
{
    if (task == null) return;

    ReplaceTopLevelStrings(task, parser);
    ProcessParameters(task, parser);
    ProcessManualApproval(task, parser);
    ReplaceListItems(task.Dependencies, parser);
}

private void ReplaceTopLevelStrings(WorkflowTask task, IExpressionParser parser)
{
    task.Name = ReplaceIfNotNull(task.Name, parser);
    task.Description = ReplaceIfNotNull(task.Description, parser);
    task.Output = ReplaceIfNotNull(task.Output, parser);
}

private void ProcessParameters(WorkflowTask task, IExpressionParser parser)
{
    if (task.Parameters == null || task.Parameters.Count == 0) return;

    foreach (var key in task.Parameters.Keys.ToList())
    {
        var value = task.Parameters[key];
        task.Parameters[key] = ProcessParameterValue(value, parser);
    }

    _placeholderReplacer.ReplacePlaceholdersInParameters(task.Parameters, parser);
}

private object ProcessParameterValue(object value, IExpressionParser parser)
{
    switch (value)
    {
        case JObject jObject:
            var context = TryDeserializePluginContext(jObject);
            if (context == null) return value;
            ApplyPlaceholdersToPluginContext(context, parser);
            return context;

        case JArray jArray:
            var list = TryDeserializePluginContextList(jArray);
            if (list == null) return value;
            foreach (var ctx in list)
                ApplyPlaceholdersToPluginContext(ctx, parser);
            return list;

        case string s:
            return ReplaceIfNotNull(s, parser);

        default:
            return value;
    }
}

private void ProcessManualApproval(WorkflowTask task, IExpressionParser parser)
{
    var approval = task.ManualApproval;
    if (approval == null) return;

    approval.Instructions = ReplaceIfNotNull(approval.Instructions, parser);
    approval.DefaultAction = ReplaceIfNotNull(approval.DefaultAction, parser);

    ReplaceListItems(approval.Approvers, parser);
}

private void ReplaceListItems(List<string>? list, IExpressionParser parser)
{
    if (list == null || list.Count == 0) return;

    for (int i = 0; i < list.Count; i++)
    {
        list[i] = ReplaceIfNotNull(list[i], parser);
    }
}