Prompt library
Prompts that work, ready to paste.
Fill in the blanks, copy, or open straight in Claude or ChatGPT. Each prompt explains why it is worded the way it is, so you can adapt it to your own work.
Fix a Bug From an Error Message
A copy-paste prompt that makes an AI explain the cause of an error first, then give the smallest fix and a way to confirm it.
DebuggingExplain a Stack Trace Line by Line
A prompt that turns a long stack trace into plain words: which frame matters, what each line means, and where to look next.
DebuggingFind Why a Test Fails
Give the failing test, the code under test and the output. The prompt asks whether the code or the test is wrong before changing anything.
DebuggingFind Why Code Is Slow
A prompt for slow functions and queries: the model ranks likely bottlenecks, says how to measure each, and only then suggests a fix.
CodingWrite Unit Tests for a Function
A prompt that makes an AI write unit tests edge cases first, in your test framework, with clear names and no needless mocks.
CodingRefactor Without Changing Behavior
A refactoring prompt that keeps behaviour identical: small steps, tests kept green, and a short summary of every change.
CodingExplain Code Line by Line
A prompt that explains code at your level, line by line, then points out what could go wrong and a safer version.
CodingConvert Code to Another Language
Translate code between languages with idiomatic results: same behaviour, the target language's conventions, and notes on differences.
AI coding agentsWrite a CLAUDE.md Starter for a Repo
A prompt that writes a CLAUDE.md file for your project: stack, commands, conventions and rules, short enough that Claude Code follows it.
AI coding agentsReview a Pull Request Diff
A code review prompt that puts bugs first, then risky changes, then style, each with the file and line, and no rewrite of the whole PR.
AI coding agentsPlan a Feature Before Coding
Ask an AI coding agent for a plan before it writes code: files to change, steps, risks and open questions, then approve it.
WritingWrite a README People Finish
A prompt that writes a README with what the project does, install, one working example and where to get help, without filler.
WritingRewrite for Clarity, Keep My Voice
An editing prompt that makes text shorter and clearer without changing its meaning, adding claims or turning it into generic AI prose.
WritingWrite Release Notes From Commits
Turn a list of commit messages into release notes grouped by what users notice, with internal changes left out.
ResearchCompare Two Libraries Honestly
A prompt for choosing between two tools: a trade-off table for your use case, when to pick each, and what to verify yourself.
ResearchSummarize a Long Document With Quotes
A summary prompt that backs every key point with an exact quote, so you can check it against the source instead of trusting it.
Data & SQLWrite SQL From Plain English
Give the schema and a question in plain English; get a SQL query for your database, an explanation of each clause and performance notes.
Data & SQLClean a CSV File With Python
A prompt that writes a Python script to clean a CSV: fixes you list, a report of what changed, and no silent data loss.
Prompt engineeringTurn a Vague Ask Into a Clear Prompt
A meta-prompt: give a rough one-line request; the AI asks the questions it needs, then writes a clear prompt with context and format.
Prompt engineeringWrite a System Prompt for an Assistant
A prompt that drafts a system prompt for your assistant or bot: role, audience, rules, tone, what to do when unsure, and the output format.
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1 · What do you need?
2 · Fill in
Answer format
3 · Your prompt
You are a senior Python 3.12 developer. I get this error: ``` KeyError: 'email' ``` What I expected: the user's email is saved. Explain the most likely cause, give the smallest fix as a diff, and tell me how to confirm it. Ask if you need more context. Answer as numbered steps.
Get better answers from any AI.
Give the real context
Paste the error, the code, the data sample or the document. A model can only use what you give it, and vague input gets a generic answer.
Say what a good answer looks like
Ask for a format: steps, a diff, a table, under 100 words. It is the fastest way to get something you can use without editing.
Ask it to check before guessing
“Ask me if you need more context” and “mark anything you are unsure about” make made-up details much less likely.
Keep secrets out
Remove passwords, API keys and personal data from anything you paste into an AI tool. These prompts run in your browser; nothing is sent to this site.
Want the background? Read the guides, or browse prompts by category above.