Workflow to set the state In Progress to a parent task

Marco Tarantino please find the code below:

const entities = require('@jetbrains/youtrack-scripting-api/entities');
const workflow = require('@jetbrains/youtrack-scripting-api/workflow');

exports.rule = entities.Issue.onChange({
  title: 'Set parent task to In Progress when subtask changes to In Progress',
  guard: (ctx) => {
    return ctx.issue.isReported && ctx.issue.becomes("State", "In Progress");
  },
  action: function (ctx) {
    const processParent = function (issue) {
      if (issue.links['subtask of'].isEmpty()) {
        return;
      }
      const parent = issue.links['subtask of'].first();
      if (parent && parent.project && !parent.project.isArchived && parent.isReported) {
        const field = parent.project.findFieldByName(ctx.State.name);
        if (field) {
          const value = field.findValueByName(ctx.State.InProgress.name);
          if (value) {
            parent.State = value;
            workflow.message('Automatically set parent {0} to In Progress', parent.id);
            return parent;
          }
        }
      }
    };

    let issue = ctx.issue;
    while (issue) {
      issue = processParent(issue);
    }
  },
  requirements: {
    State: {
      type: entities.State.fieldType,
      InProgress: {
        name: "In Progress"
      }
    }
  }
});

This will set the parent task to In Progress whenever a subtask is set to that state. You can use this code to create a separate rule within the default Subtasks workflow or add it as a separate workflow.