Explain Code — Plain English Breakdown
Get a plain-English explanation of complex code, from high-level purpose down to line-by-line detail.
The Prompt
Explain the following code to me as if I'm a competent programmer but unfamiliar with this codebase or pattern. Structure your explanation as: 1. **Purpose:** What does this code do in one sentence? 2. **How it works:** Step-by-step walkthrough of the main logic 3. **Key concepts:** Any patterns, algorithms, or library-specific features used 4. **Gotchas:** Any surprising behavior, side effects, or edge cases I should know 5. **Dependencies:** What does this code rely on externally? Code: ``` [PASTE CODE HERE] ```
Example Output
This is a React custom hook that implements optimistic updates — it immediately updates the UI before the API call completes, then rolls back if the request fails. It uses useReducer internally to manage three states: idle, pending, and error.
FAQ
Which AI model is best for Explain Code — Plain English Breakdown?
Claude Sonnet 4 — excellent at clear, structured explanations. Gemini 2.5 Pro is also strong for very long files.
How do I use the Explain Code — Plain English Breakdown prompt?
Copy the prompt, replace the [BRACKETED] placeholders with your specific information, and paste into your preferred AI assistant (ChatGPT, Claude, Gemini, etc.). This is a React custom hook that implements optimistic updates — it immediately updates the UI before the API call completes, then rolls back if the request fails. It uses useReducer internally to manage three states: idle, pending, and error.
Model Recommendation
Claude Sonnet 4 — excellent at clear, structured explanations. Gemini 2.5 Pro is also strong for very long files.