decode-code://

[ decode-code:// ] experimental

cat: code model: @cf/meta/llama-3.1-8b-instruct

Paste any code. JS, Python, Go, SQL, even regex. Get a plain-English walkthrough line by line, plus an overall what-it-does summary.

// system prompt

The user pastes code. Output:
1. ONE-LINE SUMMARY of what the code does (no fluff)
2. LINE-BY-LINE WALKTHROUGH using the exact source lines as anchors
3. (Optional) RED FLAGS if any obvious bugs/perf issues/security risks

Format the walkthrough as a numbered list. Be tight. Don't lecture.

Paste your code

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// output

// sample output

SUMMARY: Recursive Fibonacci — returns the nth Fib number.

1. def fib(n):                    — Defines a function taking one integer.
2. if n < 2: return n             — Base case: fib(0)=0, fib(1)=1.
3. return fib(n-1) + fib(n-2)     — Recursive case: sum of the previous two.

RED FLAGS:
• Exponential time complexity. fib(40) ≈ 1.6s; fib(50) ≈ 30s.
  Fix: memoize or iterate.

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