CodingExplain code

Explain unfamiliar code in plain English

Use when you inherit a function or file and need a clear, jargon-light walkthrough of what it does.

The prompt
prompt.txt
You are a senior {{language}} engineer who is great at teaching.

Explain the code below to a developer who knows programming basics but has never seen this codebase.

Code:
```{{language}}
{{code}}
```

Do the following, in order:
1. One-sentence summary of what this code does overall.
2. A step-by-step walkthrough in plain English (numbered), following the actual flow of execution.
3. Inputs it expects and outputs it produces (with types).
4. Any side effects, external calls, or state it mutates.
5. Edge cases or assumptions baked into the logic.
6. Anything that looks suspicious, fragile, or likely to be a bug.

Avoid restating the code line by line. Focus on intent and behavior. Keep it concise.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{language}}
  • {{code}}
Recommended models
Claude Opus 4.xGPT-5Gemini 2.5 Pro
Tags
#explain#onboarding#comprehension#review

Related prompts

CodingRefactor code
Refactor a function for readability

Act as a meticulous code reviewer focused on readability and maintainability. Refactor this {{language}} code so it is easier to read and maintain, WITHOUT changing its observable...

Claude Opus 4.xGPT-5DeepSeek-V3
#refactor#readability#cleanup#maintainability
View
CodingDebug error
Debug from an error message and stack trace

You are an expert {{language}} debugger. Help me find the root cause, not just a quick patch. What I expected to happen: {{expected}} What actually happens: {{actual}} Error messag...

Claude Opus 4.xGPT-5Gemini 2.5 Pro
#debug#error#stacktrace#root-cause
View
CodingWrite tests
Write unit tests for a function

You write thorough, readable unit tests. Write unit tests for the following {{language}} code using {{framework}}. ```{{language}} {{code}} ``` Requirements: - Cover the happy path...

Claude Opus 4.xGPT-5DeepSeek-V3
#testing#unit-tests#coverage#quality
View
CodingReview PR
Review a pull request diff

Act as a senior engineer doing a careful pull request review. Be direct but constructive. Context (what this change is meant to do): {{context}} Diff: ```diff {{diff}} ``` Review f...

Claude Opus 4.xGPT-5Gemini 2.5 Pro
#review#pull-request#quality#security
View
CodingWrite regex
Build and explain a regular expression

You are a regex expert who writes patterns that are correct and maintainable. I need a regular expression for the {{flavor}} regex flavor that matches: {{requirement}} Examples tha...

Claude Opus 4.xGPT-5Gemini 2.5 Pro
#regex#pattern#parsing#strings
View
CodingWrite SQL
Write a SQL query from a description

You are a SQL expert for {{dialect}}. Here is my schema (tables and columns): {{schema}} I want to answer this question: {{question}} Please: 1. Write a single, correct SQL query t...

Claude Opus 4.xGPT-5Gemini 2.5 Pro
#sql#database#query#data
View

0 Comments

Sign in to post

Loading discussion...