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Implementing Business Logic with AI Autocompletion

This guide explains how to use Código's DevAI to implement your instruction logic through contextual autocomplete.

You don’t need to write every line manually. Código helps you go faster by predicting and inserting relevant business logic right into your code.

1️⃣ Open Your Instruction File​

Once your program has been generated, open one of the instruction files (e.g. initialize_marketplace.rs or create_user.rs).

You’ll see a comment like:

// Implement your business logic here...

Place your cursor near the comment or on a new line below.
Código will detect the context and automatically suggest relevant code.

autocomplete

2️⃣ Accept Autocomplete Suggestion​

Once a suggestion appears, press the Tab key to accept it.

You can also hover over the suggestion with your mouse to see additional options:

  • Use the left/right arrows to cycle through alternative suggestions
  • Click Apply to accept a suggestion
autocomplete

If you change your mind or no longer want the suggestion, simply click anywhere outside the suggestion box to dismiss it.

3️⃣ Start writing and finish with autocomplete​

You can also start typing something, and DevAI will complete it based on the file context and your data model.

For example, if you type:

if marketplace.fee_bps

DevAI may suggest:

autocomplete

✅ Best Practices​

  • Review before applying: Always read through the suggested code to ensure it aligns with your intent.
  • Validate critical logic: Double check sensitive areas like authority checks, token transfers, or access control.
  • Use AI as a co-pilot, not a substitute: Autocomplete speeds you up, but your expertise ensures the code is correct.

🚀 Next Steps​

👉 Start from Prompt
👉 How to Build & Deploy My Program
👉 How to Write and Run Unit Tests