What needs to happen?
Be concrete about the input, transformation, and result.
Complexity should earn its place
Use the lightest layer that works.
Describe the job. Mark the capabilities it truly needs. Get the first sufficient answer in the right order: spreadsheet, workflow, code, then agent.
Start with the job, not the tool.
The recommendation changes only when the task earns a heavier capability. Nothing is added for novelty.
What must it handle?
Select requirements, not ambitions.
First
Spreadsheet
Structured rows, formulas, filters, and a human-controlled run are enough.
Then
Workflow
Triggers and handoffs connect known systems without custom software.
Only if earned
Code
Custom logic, scale, or strict validation justify a maintained program.
Recommendation01
Spreadsheet
Structured input and repeatable formulas can keep this simple.
Make the call
Analyze a task to see which heavier layers you avoid.
The order is the feature.
A more capable layer is not automatically a better fit. Each step adds cost, failure modes, and ownership.
The best automation architecture is the first one that can deliver the outcome truthfully, reliably, and without pretending complexity is intelligence.
Can rows and formulas do it?
Use a spreadsheet for structured inputs, visible calculations, and human-reviewed runs. It is inspectable, editable, and often already in the team's hands.
Does it need a trigger or handoff?
Add a workflow when timing and movement between known systems are the real requirement. Keep the transformations explicit.
Has custom logic become essential?
Write code when the rules, validation, scale, or performance cannot be expressed safely in the lighter layers.
Is judgment genuinely part of the job?
Use an agent only for unstructured interpretation, contextual decisions, and changing plans. Give it boundaries, evidence, and a recovery path.
Four layers. One stopping rule.
Explore each layer's natural territory. The workbench always stops at the first sufficient one.
Earn the agent.
Run the workbench on the task in front of you, then export the smallest honest implementation brief.