Skip to content
PromptifyLab

Prompt collection

Developer & Technical

56 prompts Free · no sign-up Works in ChatGPT, Claude & Gemini Search & filter these

Code review, debugging, tests, docs, refactoring, DevOps, SQL and building with models. 56 copy-ready prompts across 8 categories – fill in the brackets, copy, and paste into ChatGPT, Claude, Gemini or any capable assistant.

Developers were the first group to use AI daily and are the quickest to notice when it is wrong, because the code either runs or it does not. That makes this the pillar where prompt quality is most measurable — and where the difference between a lazy prompt and a careful one is largest.

Everything here assumes you can read the output critically. None of it is written to let you ship code you do not understand.

8 categories

  • Code Review

    Reviews that find defects with a reproduction, not a list of naming preferences.

    7 prompts

  • Debugging

    Getting from a stack trace to the actual cause without twelve wrong guesses.

    7 prompts

  • Testing & QA

    Tests written against the spec, not against the implementation's bugs.

    7 prompts

  • Documentation

    READMEs, API docs and comments that explain why, not what the code already says.

    7 prompts

  • Refactoring

    Structural change with the behaviour held still, in reviewable steps.

    7 prompts

  • DevOps & Infrastructure

    CI pipelines, Dockerfiles, IaC and incident write-ups.

    7 prompts

  • Databases & SQL

    Queries, schema review and the explain-plan conversation.

    7 prompts

  • AI Engineering

    Building on models: system prompts, evals, RAG, structured output, cost control.

    7 prompts

A good first prompt from each

Code ReviewReview a diff like a senior engineerGet a code review that finds real problems instead of style nits.Get the prompt →DebuggingDebug from a stack trace systematicallyTurn an error and a trace into a ranked list of causes.Get the prompt →Testing & QAGenerate tests that find bugs, not tests that passWrite a test suite aimed at breaking the code.Get the prompt →DocumentationWrite a README that gets someone running in five minutesDocument a project so a new person can use it without asking.Get the prompt →RefactoringRefactor safely without changing behaviourRestructure code while keeping it provably equivalent.Get the prompt →DevOps & InfrastructureWrite a Dockerfile that is small, fast and safeContainerise an application properly.Get the prompt →Databases & SQLOptimise a slow SQL queryFind out why a query is slow and fix it.Get the prompt →AI EngineeringWrite a system prompt for a production LLM featureBuild a system prompt that behaves predictably at scale.Get the prompt →

How to use these prompts

  1. Pick a category above, or search the whole prompt library.
  2. Press “Fill in” on any prompt to replace the [BRACKETED] parts in a simple form – or copy it and edit it in your AI tool.
  3. Read the tip under each prompt. It usually names the thing that goes wrong first.
  4. Got your own prompt? Run it through the Prompt Improver to see what is missing.