How do you work with complex tasks? How does planning and decomposition happen?

When working with complex tasks, I use a decomposition and step-by-step planning approach:

1. Task analysis. First, I thoroughly study the requirements and goals to understand exactly what needs to be done.

2. Decomposition. I break down a large task into smaller sub-tasks or stages that are easier to implement and verify.

3. Prioritization. I determine which sub-tasks are critical and should be completed first, and which can be postponed.

4. Time and resource estimation. I estimate how much time and effort each sub-task will require.

5. Planning. I create a work plan considering priorities and estimates, and allocate tasks over time.

6. Implementation and iterations. I execute tasks according to the plan, regularly check results, and adjust the plan if necessary.

7. Communication. I discuss the plan and progress with the team to consider opinions and gain support.

An example in Go (simplified):

// Suppose we need to implement a complex function, breaking it into stages
func ComplexTask() error {
    if err := stepOne(); err != nil {
        return err
    }
    if err := stepTwo(); err != nil {
        return err
    }
    if err := stepThree(); err != nil {
        return err
    }
    return nil
}

func stepOne() error {
    // implementation of the first stage
    return nil
}

func stepTwo() error {
    // implementation of the second stage
    return nil
}

func stepThree() error {
    // implementation of the third stage
    return nil
}

This approach helps manage complexity and reduce risks.