Best AI Prompts for Coding
The best AI prompts for coding describe the problem like a good GitHub issue: what should change, where it belongs, what must stay unchanged, and how success will be tested. Instead of relying on a clever one-liner, give the AI enough context to reason about your actual task.
This guide is a practical library of AI coding prompts for real software-development work: generating features, debugging errors, refactoring, writing tests, reviewing code, exploring an unfamiliar repository, and planning architecture. Each prompt uses editable placeholders so you can adapt it to your language, framework, project, and development workflow.
A prompt does not make generated code correct by itself. Treat code from an AI as a proposal: inspect the change, run the relevant tests and tools, and use your judgment before shipping it. Clear, specific instructions and relevant context help make model responses more useful, while iteration and evaluation remain important because model outputs can vary.
What makes a good AI coding prompt?#
A strong coding prompt works like a concise engineering ticket. It describes the desired outcome, gives the model relevant evidence, sets boundaries, and explains how to tell whether the result is correct. This structure is useful whether you are asking a chat model for advice or asking a coding agent to inspect and change a repository.
Include these elements where they apply:
- Goal: State the specific task: fix a bug, add a feature, explain a function, or review a diff.
- Context: Supply the relevant language, framework, runtime, files, code, logs, and reproduction steps. For repository-based work, identify the relevant area or ask the agent to inspect it.
- Expected behavior: Describe what should happen, including how it differs from the current behavior.
- Constraints: Name relevant APIs, dependencies, conventions, performance or security requirements, and files or behavior that must not change.
- Acceptance criteria: List observable conditions that define “done.”
- Verification: Specify tests, builds, linting, type checks, or manual scenarios. Ask the model to report what it did and could not verify.
- Output format: Say whether you want a plan, explanation, patch, test cases, or findings in a structured format.
For example, “make the login better” leaves the meaning of “better” open. Does the task concern error messages, accessibility, performance, security, or layout? A more useful prompt specifies the desired behavior, current implementation, relevant files, constraints, and acceptance criteria.
Prompts should also make uncertainty visible. Ask the model to identify missing information, distinguish evidence from assumptions, and avoid inventing project details. If the model cannot inspect a repository or run commands in your environment, it should say so rather than claim it has verified something.
Best AI Prompts for Code Generation#
Use code-generation prompts for a focused function, component, API endpoint, script, utility, or small feature. The key is to define the behavior and scope before asking for implementation. If the work depends on existing conventions, include a nearby example or direct the model to inspect similar code first.
- Implement a feature
Implement [feature] in [language/framework]. Current behavior: [context]. Desired behavior: [expected behavior]. Requirements: [requirements]. Constraints: [dependencies, conventions, public APIs, files not to change]. First identify the files involved and any ambiguity. Then propose the smallest maintainable change. Add or update tests, and explain how to verify the result. Do not invent APIs, packages, or repository facts; flag anything you cannot confirm.
How to use it: Replace each placeholder with concrete details. For repository tasks, supply the relevant file paths or use an agent that can inspect the project.
- Generate a function from a specification
Write a [language] function that [task]. Inputs: [types and meaning]. Output: [type and meaning]. Requirements: [rules]. Handle [edge cases]. Follow this example of the project’s style: [example]. Include a brief explanation and tests for normal, boundary, and invalid inputs. If the specification is incomplete, list the questions or assumptions before coding.
- Build a UI component
Create a [framework] component for [purpose]. Props: [props and types]. Required states: [loading, empty, error, success, or other]. Accessibility requirements: [keyboard, labels, focus behavior]. Visual constraints: [design system or styling conventions]. Use existing project patterns and dependencies where possible. Include tests for the main states. Do not add a dependency without explaining why it is needed.
- Implement an API endpoint
Implement an endpoint for [resource/action] using [framework]. Follow the existing API conventions in [file or example]. Input: [schema]. Expected success response: [shape/status]. Expected errors: [cases]. Include validation, authorization requirements, and tests. Do not assume a new database field, package, or API exists; identify any missing project information first.
- Write a command-line script
Write a [language] script that [task]. It should accept [arguments/options], produce [output], and handle [failure cases]. Constraints: [runtime, dependencies, operating system, file safety requirements]. Include a usage example and tests or a safe verification procedure. Avoid destructive actions unless explicitly requested, and require confirmation before [specified risky operation].
- Add input validation
Add validation for [input] in [file/component]. Valid values are [rules]. Invalid input should [expected response]. Preserve existing behavior for [valid cases]. Follow the project’s existing validation and error-reporting patterns. Add tests for valid, invalid, boundary, and missing values. Show which validation rules came from the requirements and which details still need confirmation.
- Implement from a ticket or specification
Implement the requirements in this ticket: [paste ticket/specification]. Before editing, summarize the acceptance criteria and identify affected files or components. List ambiguities and risks. Then make a focused change that satisfies the criteria, add appropriate tests, and report the exact verification performed. Do not treat an unstated requirement as fact.
Best AI Prompts for Debugging#
Useful AI debugging prompts provide evidence: the exact error, steps to reproduce, relevant code, environment, and what changed recently. Ask the model to investigate and rank plausible causes before it edits code. That encourages a diagnosis based on the observed failure rather than a speculative rewrite.
- Diagnose an error systematically
Debug this issue systematically. Reproduction steps: [steps]. Error or logs: [exact output]. Relevant code: [files/snippets]. Environment: [language/runtime/framework/version if known]. Recent changes: [changes]. First rank the likely root causes and connect each one to evidence. Then propose the smallest fix and list regression tests. Do not claim to have reproduced the issue unless you actually did.
- Investigate a failing test
Investigate why this test fails. Test name and output: [details]. Relevant test and implementation: [code]. Expected behavior: [expectation]. Actual behavior: [result]. Determine whether the test, implementation, setup, or fixture is most likely responsible. Explain your evidence before proposing a focused fix. Preserve unrelated behavior and suggest additional regression coverage.
- Debug an intermittent bug
Analyze this intermittent failure. Symptoms and frequency: [details]. Steps or conditions that sometimes trigger it: [details]. Logs, timestamps, or traces: [evidence]. Relevant code paths: [files]. List plausible causes involving timing, concurrency, state, caching, or external dependencies only where supported by the evidence. Suggest safe ways to gather more evidence before recommending a code change.
- Trace a null or missing-value error
Trace how [value] can become null, undefined, empty, or otherwise invalid in [feature]. Relevant code: [files/snippets]. Error: [output]. Identify the data sources, transformations, and assumptions along the path. Separate confirmed facts from hypotheses. Recommend the narrowest fix that matches the intended contract, with tests for both present and missing values.
- Find a regression
Find the likely source of this regression. Previous behavior: [description]. New behavior: [description]. Last known working version or change range: [details]. Relevant diff, logs, and tests: [evidence]. Compare the evidence to the expected behavior, identify likely changes, and propose a minimal fix. Do not attribute the regression to a commit or file unless the supplied evidence supports it.
- Debug a performance issue
Investigate this performance problem. Slow operation: [operation]. Expected and observed performance: [measurements, if available]. Workload and environment: [details]. Relevant code or profiling output: [evidence]. Identify likely bottlenecks, label unverified hypotheses, and recommend a measurement that could confirm each one. Do not claim a speedup without a benchmark or other supporting evidence.
- Explain a compiler or type error
Explain this [compiler/type-checker] error: [exact error]. Relevant code and types: [snippets]. Explain what the diagnostic means in this context, identify the smallest compatible correction, and point out any change in runtime behavior or type safety. If multiple fixes are viable, compare them and state what additional context would distinguish them.
How to use debugging prompts: Paste exact output rather than paraphrasing it. Remove secrets, tokens, personal data, and sensitive customer information from logs before sharing them.
Best AI Prompts for Refactoring#
Refactoring changes a system’s internal structure while aiming to preserve externally observable behavior. Be explicit about what must remain stable: public APIs, data formats, user-facing behavior, and existing tests. For larger tasks, request a plan first and break the work into reviewable steps.
- Improve readability without changing behavior
Refactor [module/function] to improve [readability or maintainability goal] without changing external behavior. Preserve [public APIs, input/output behavior, tests]. Follow the project’s conventions in [example/file]. Show a short plan first, keep the diff focused, and list any behavior that cannot be proven equivalent from the supplied context. Add or update tests where needed.
- Remove duplicated logic
Identify duplicated logic in [files or area] and propose a refactor that reduces duplication without creating an unnecessary abstraction. Explain which behavior is genuinely shared and which differences must remain. Preserve existing APIs and error handling. Implement only the smallest justified change and add tests that cover the shared behavior and important differences.
- Break a large module into smaller units
Propose a decomposition of [module] into smaller responsibilities. Use the current code and project conventions: [context]. Show the proposed boundaries, dependencies, and migration sequence. Identify risks such as circular dependencies or changed initialization behavior. Do not edit code until the plan is reviewed. After approval, refactor in small steps and verify each step.
- Modernize legacy code
Modernize [file/module] using supported features of [language/runtime version]. Preserve [behavior, API, compatibility constraints]. First identify the current patterns and any version assumptions visible in the repository. Propose a limited modernization plan, then implement a focused change with tests. Do not upgrade unrelated dependencies or change behavior unless the task explicitly allows it.
- Clean up an API
Review the API of [component/module] for confusing names, unnecessary options, or inconsistent behavior. Describe the current contract based on [code/docs/tests]. Propose improvements and explain compatibility risks. Do not remove or rename a public API without identifying affected callers and proposing a migration path. Add tests for any approved API change.
- Refactor across multiple files
Refactor [feature or responsibility] across the necessary files while preserving observable behavior. First inspect callers, tests, and related implementations. Provide an ordered plan with expected files and risks. Keep each change logically scoped, do not reformat unrelated code, and update tests or documentation where necessary. At the end, summarize the diff and verification results.
Best AI Prompts for Code Review#
A useful code review prompt asks for evidence-backed findings, not general advice. Focus on defects that could affect correctness, security, reliability, performance, or maintainability. Ask for severity and a concrete fix, and make clear that style preferences should not be reported as bugs.
- Review a pull request diff
Review this diff as a senior engineer. Prioritize real defects over style preferences. For each finding, include severity, file or area, evidence, impact, and a concrete fix. Check correctness, regressions, edge cases, security, performance, and missing tests. Flag unsupported assumptions. If you find no actionable issue, say so without inventing findings. Diff: [paste diff].
- Review for edge cases
Review [function or diff] for edge cases that could cause incorrect results. Requirements: [requirements]. Consider boundary values, empty or missing input, invalid input, repeated calls, state changes, and failure responses where relevant. For each possible issue, cite the code path and explain the scenario. Label speculative concerns clearly and recommend tests for confirmed risks.
- Review a database change
Review this database change for data correctness and migration risk. Schema or migration: [details]. Relevant queries and application code: [files]. Check existing data, nullability, defaults, indexes, rollback behavior, and compatibility between application versions where applicable. Separate confirmed issues from questions that need product or operations context. Do not assume production data characteristics that were not provided.
- Review an authentication or authorization change
Review this change to authentication or authorization. Relevant requirements: [rules]. Diff and related code: [context]. Trace who can access which action or resource, including unauthenticated and unauthorized cases. Report only evidence-backed findings, with severity, affected path, and a safe validation approach. Do not claim the system is secure based on this review alone.
- Review error handling
Review error handling in [diff or component]. Check whether failures are propagated, translated, logged, or swallowed appropriately. Consider retries, partial success, cleanup, and user-visible errors where relevant. For each finding, explain the triggering scenario and consequences. Recommend focused tests for important failure paths, without assuming undocumented behavior.
- Review test coverage in a pull request
Review this diff and its tests. Identify important behavior changes that are not covered, including boundaries, failure modes, and likely regressions. Explain why each missing test matters and suggest the smallest useful test case. Do not ask for tests that merely duplicate implementation details or assert incidental formatting.
Best AI Prompts for Testing#
Test-generation prompts work best when the model derives cases from requirements and expected behavior—not only from the current implementation. Include the project’s testing framework and style if known, then inspect the generated tests to make sure their assertions reflect the real contract.
- Generate unit tests from requirements
Design unit tests for [function/feature] from these requirements: [requirements]. Cover normal cases, boundaries, invalid input, failure modes, and likely regressions. Use [test framework/style] if confirmed by the supplied example. Avoid tests that simply reproduce the current implementation. First list the cases, then write tests and explain what each case verifies.
- Add regression tests for a bug
Write a regression test for this bug. Reproduction: [steps or input]. Expected behavior: [expectation]. Current failure: [result]. Relevant code and existing tests: [context]. Add the narrowest test that fails before the fix and passes after it, following project conventions. Do not change the implementation unless asked. State whether you could verify that the test fails on the unfixed code.
- Test a boundary-heavy function
Create tests for [function] with emphasis on boundaries. Rules: [requirements]. Identify boundary values for each input, including empty, minimum, maximum, just below or above a limit, and invalid types where applicable. Explain why each case belongs in the suite, then write tests using the project’s existing style.
- Test API integration behavior
Design integration tests for [endpoint or workflow]. Requirements: [requirements]. Cover successful requests, validation errors, authorization, persistence or side effects, and relevant dependency failures. Use the project’s existing test setup: [example/configuration]. Keep external services isolated using established project patterns; do not introduce a new test dependency without asking.
- Test error and recovery paths
Add tests for failure and recovery behavior in [component]. Relevant failure modes: [list]. Expected outcomes: [requirements]. Verify error reporting, cleanup, state consistency, and retry behavior only where the code’s contract requires them. Use the existing test patterns and keep assertions focused on observable behavior.
- Create property-style tests
Identify useful invariants for [function or data structure] from this specification: [rules]. Propose property-style tests for those invariants using the project’s existing tools, if available. Do not assume a property-testing package is installed; identify the current dependencies or ask before adding one. Include examples of inputs that should violate each invariant.
- Assess whether a test suite is meaningful
Review these tests for [feature]. Requirements: [requirements]. Identify which requirements are covered, which are missing, and whether any tests can pass while the feature is incorrect. Focus on observable behavior, meaningful assertions, and failure scenarios. Suggest a prioritized set of additions without rewriting the whole suite unnecessarily.
Best AI Prompts for Understanding Existing Code#
When exploring an unfamiliar or legacy repository, ask for a map of the current behavior before requesting a change. Useful explanations connect entry points, data flow, dependencies, side effects, and tests—and distinguish what the code proves from what remains an assumption.
- Explain a feature end to end
Explain how [feature] works end to end in this codebase. Identify the entry point, important files/classes, data flow, dependencies, side effects, and relevant tests. Support each statement with file paths or code evidence where available. Separate confirmed behavior from assumptions. Do not propose changes until the current behavior is understood.
- Map a request or event flow
Trace [request/event/job] from its entry point to its final outcome. Identify the handlers, transformations, calls to external services, data writes, and error paths. Include file paths and function names when visible in the repository. If the trail cannot be confirmed from available code, say where it breaks rather than guessing.
- Identify the owners of a behavior
Find where [behavior] is implemented and where it is tested. Search for the entry point, key functions, related configuration, callers, and documentation. Summarize the evidence with paths and explain any competing implementations or unclear ownership. Do not infer that a file is unused unless the repository evidence supports that conclusion.
- Explain a dependency’s role
Explain how [dependency or module] is used in this project. Identify the relevant imports, calls, configuration, and tests. Describe what the code relies on it to do, and distinguish that from general claims about the package. Do not recommend replacing it unless the task asks for alternatives.
- Create an onboarding map
Create an onboarding guide for [area of repository]. Based on the available code and docs, list the main entry points, important modules, data flow, test commands that are explicitly documented, and useful files to read first. Mark anything that could not be confirmed. Do not invent setup commands or architectural conventions.
Best AI Prompts for Architecture and Planning#
Use planning prompts before a large feature, migration, or system change. Ask the model to compare a small number of viable approaches, make trade-offs explicit, identify affected surfaces, and propose a sequence that can be reviewed before implementation.
- Compare implementation approaches
Design an implementation plan for [requirement] within this architecture: [context]. Compare 2–3 viable approaches. For each, explain trade-offs, affected modules, API or data changes, risks, and tests. Prefer the smallest solution that fits existing patterns. Identify questions that need an engineering or product decision before implementation.
- Plan a migration
Plan a migration from [current state] to [target state]. Constraints: [downtime, compatibility, data volume, rollback requirements]. Identify stages, dependencies, validation checks, risks, rollback options, and how old and new versions coexist. Distinguish repository evidence from assumptions about production. Do not propose destructive steps without explicitly flagging them.
- Plan a new service or component
Propose a design for [service/component] that fits [existing system context]. Describe responsibilities, interfaces, data ownership, dependencies, failure behavior, and observability needs. Compare alternatives where meaningful. Keep the proposal proportional to the requirements and identify the information needed before committing to an implementation.
- Assess the impact of a change
Assess the likely impact of changing [API, data model, or behavior]. Inspect the supplied callers, tests, and documentation: [context]. List affected surfaces, compatibility concerns, possible regressions, and tests or checks to run. Cite evidence for identified dependencies and label anything that may exist outside the supplied context.
- Break a large feature into engineering tasks
Break [feature] into small, reviewable implementation tasks. Requirements: [requirements]. For each task, state the goal, likely area of the codebase, dependencies, acceptance criteria, and verification. Keep tasks independently understandable where possible. Flag unresolved product or architecture decisions rather than burying them in implementation details.
Best AI Prompts for Documentation#
Documentation should describe what the code actually does, not what a model assumes it ought to do. Provide source files, API contracts, examples, or confirmed behavior. Ask the model to flag gaps rather than fill them with invented details.
- Update a README section
Write or update the README section for [component or workflow] based on these verified details: [code/docs/behavior]. Cover purpose, prerequisites, usage, configuration, and limitations where confirmed. Follow the existing README style. Mark missing information for review instead of inventing setup commands, options, or outputs.
- Document a function or API
Write documentation for [function/API] based on this code and verified behavior: [source/tests]. Cover purpose, parameters, return value, errors, side effects, and an example if the behavior is supported by evidence. Follow [documentation format]. Flag any contract detail that cannot be confirmed.
- Create an architecture note
Draft an architecture note for [system or feature] using these source files and verified facts: [context]. Explain responsibilities, key components, data flow, dependencies, and known limitations. Separate confirmed behavior from open questions. Do not describe intended future behavior as if it exists today.
- Write release notes
Draft release notes for these changes: [merged commits or verified change summary]. Explain user-visible improvements, fixes, and any migration steps supported by the supplied evidence. Avoid claiming impact that the diff does not establish. Flag changes that need product or release-manager confirmation.
Best AI Prompts for Performance and Security Review#
AI can help surface questions and review evidence, but it cannot certify a system as secure or optimized based on a prompt alone. Ask for plausible risks, supporting code paths, severity, and a safe validation method. Treat unverified performance or security concerns as hypotheses until they are independently investigated.
- Review for security risks
Review this code for likely security risks. Context and requirements: [details]. Code or diff: [context]. For each item, separate confirmed issues from hypotheses. Explain the possible attack or failure path, supporting evidence, severity, and safe validation method. Do not claim a vulnerability—or that the code is secure—without sufficient evidence.
- Review input handling and data exposure
Review how [input or sensitive data] is accepted, validated, stored, logged, and returned in [feature]. Requirements: [rules]. Identify evidence-backed risks such as unsafe handling, unintended exposure, or missing checks. State what is unknown, suggest safe validation, and avoid reproducing or exposing real secrets in your response.
- Review for performance bottlenecks
Review [code path] for likely performance bottlenecks. Expected workload: [details]. Available measurements or profiles: [evidence]. Identify expensive operations and explain why they may matter under the stated workload. Separate measured problems from hypotheses, propose a way to validate each, and avoid claiming a speedup without benchmark evidence.
- Review concurrency risks
Review this code for concurrency or shared-state risks. Relevant execution model: [details]. Code and observed symptoms: [context]. Identify possible race conditions, ordering assumptions, or unsafe state sharing only where supported by the code. For each concern, explain the triggering scenario and recommend a test or diagnostic that can validate it.
- Review dependency and configuration risks
Review the supplied dependency changes and configuration for potential reliability or security concerns. Diff and relevant project files: [context]. Identify what can be confirmed from the supplied information and what requires checking current vendor documentation or project policy. Do not invent package behavior, versions, advisories, or vulnerabilities.
How to prompt AI coding agents#
A coding agent may be able to inspect files and use project tools, but its access and capabilities depend on the specific product and environment. Give it a clear task and definition of done, then let it inspect relevant repository context instead of guessing. Avoid demanding a particular implementation path before the agent has examined the code.
Well-scoped issues, acceptance criteria, and repository-specific build and test guidance can make agent tasks easier to execute. GitHub’s guidance, for example, recommends clear task descriptions and acceptance criteria, and describes repository instructions as a way to provide project context such as conventions and validation steps. The exact instruction files and available tools differ by product, so check the documentation for the agent you use.
Prompt element | What to include |
|---|---|
Scope | The feature or bug, relevant area, and what is out of scope |
Repository context | File paths, similar implementations, issue details, docs, or failing tests |
Constraints | Dependencies, APIs, conventions, security and performance requirements |
Definition of done | Expected behavior and required tests, builds, linting, or type checks |
Change discipline | Inspect first, preserve unrelated behavior, keep the diff focused |
Verification | Run appropriate checks where available and report anything not verified |
- Ask an agent to investigate before editing
Investigate [task] in this repository. Inspect the relevant files, tests, and project instructions before changing anything. Summarize the current behavior, likely affected areas, missing information, and a proposed plan. Do not edit files until you have explained any assumptions or risks.
- Ask an agent to implement a scoped task
Implement [task] in this repository. Scope: [included work]. Out of scope: [excluded work]. First inspect relevant code and follow existing conventions. Make the smallest maintainable change that meets these acceptance criteria: [criteria]. Add or update tests as appropriate. Do not change unrelated files or claim a check passed unless you ran it and saw the result.
- Ask an agent to verify its change
Review your changes for correctness and unintended side effects. Inspect the diff, then run the relevant available tests, build, lint, or type-check commands. Report the exact commands run and their results. Identify checks you could not run and any remaining assumptions. Do not modify unrelated code while verifying.
- Ask an agent to explain its diff
Explain the final diff for [task]. For each changed file, summarize what changed and why. Connect the changes to the acceptance criteria and tests. List behavior or risks that remain unverified. Do not describe planned or attempted changes as if they were completed.
How to use multiple AI models for coding#
Different models may interpret a task differently or notice different edge cases. You can use that variation as a review aid—but do not treat agreement between models as proof. Repository evidence, test results, documentation, and engineering judgment remain the source of truth.
A practical multi-model workflow looks like this:
- Ask Model A to analyze the task. Provide the requirements and relevant code, then request a plan, affected areas, and open questions.
- Ask Model B to challenge the plan. Give it the proposed approach and ask it to find missing edge cases, compatibility risks, or unsupported assumptions. Ask it to distinguish evidence from speculation.
- Review disagreements. Compare each model’s reasoning against the actual code, requirements, and project conventions. Do not merge suggestions blindly.
- Implement a selected approach. Use one model or a coding agent to make a scoped change after the plan is clear.
- Ask Model C to review the diff. Request evidence-backed findings, missing tests, and possible regressions.
- Verify independently. Run the relevant tests and checks, inspect the diff yourself, and record anything that remains unverified.
Comparing several perspectives can help developers challenge implementation choices without switching between platforms. Compare coding ideas from multiple AI models in one place with UltraGPT. Challenge implementation choices, find missed edge cases, and refine stronger solutions without switching between platforms.
Practical prompt template for coding#
Use this master prompt as a starting point for a bug fix, feature, or focused refactor:
You are helping me with [task] in [language/framework]. Goal: [desired behavior].
Current behavior or problem: [context]. Relevant files or code: [paths/snippets/repository context]. Constraints: [dependencies, APIs, conventions, performance or security requirements, files not to change]. Acceptance criteria: [observable conditions]. Verification: [tests, commands, or manual scenarios]. First inspect the context and identify missing information or risky assumptions. Then propose the smallest maintainable solution. Do not invent files, APIs, packages, logs, or repository facts. Implement only after the plan is sound. Keep the diff focused, add or update tests, and finish by explaining what you changed and how the result was verified. State clearly what you could not verify.
You do not need to fill every field for every request. A small, self-contained function may need only its inputs, expected output, and edge cases. A repository-wide migration needs more context, constraints, planning, and a staged verification approach. The goal is to provide enough information for the task—not to make every prompt long.
How to improve an AI coding prompt#
If the first response misses the mark, refine the prompt using the specific gap rather than repeating the same request. A practical iteration might look like this:
- The answer is too broad: Specify the files or behavior in scope and name what is out of scope.
- The code does not match the project: Provide a nearby example or ask the model to inspect existing patterns.
- The model guessed: Ask it to label assumptions and identify what evidence it needs.
- The fix is larger than necessary: Request the smallest focused change and ask it to justify any new abstraction or dependency.
- The tests are weak: Provide acceptance criteria and ask for tests that cover observable behavior, boundaries, and failure cases.
- The answer claims success without evidence: Ask for the exact commands run and their output, or have it state that verification was not performed.
For recurring team workflows, keep effective prompts alongside project guidance and review them as the codebase changes. Some development tools support repository-level instructions or reusable prompt files; their formats and availability vary, so use current product documentation rather than assuming a particular feature exists.
Final thoughts#
The best AI coding prompts are specific enough to guide the work but open enough to let a model inspect the real problem. Start with the goal, provide relevant context, set clear constraints, and define how you will verify the result. For larger tasks, ask for analysis and a plan before implementation; for every task, treat generated code as unverified until you have inspected and tested it.
Ready to improve your coding workflow? Use multiple AI models with UltraGPT to compare implementation ideas, debug from different perspectives, and review solutions before you ship.
Frequently asked questions
What are the best AI prompts for coding?
The best prompts clearly define the task, provide relevant code or repository context, state the expected behavior and constraints, and explain how success will be verified. A concise, well-scoped engineering ticket is usually more useful than a vague request such as “write this app.”
How do I write a good prompt for code generation?
Specify the language and framework, the function or feature to build, its inputs and outputs, edge cases, project conventions, and acceptance criteria. Ask for tests and an explanation of how to verify the implementation. If the requirements are incomplete, ask the model to surface questions instead of silently guessing.
What should I include in an AI debugging prompt?
Include the exact error or log output, steps to reproduce, relevant code, environment details you know, expected behavior, actual behavior, and recent changes. Remove credentials and sensitive personal or customer information before sharing logs.
How do I prompt AI to review code?
Provide the diff, requirements, and any relevant context. Ask for actionable, evidence-backed findings ranked by severity, with the affected area, impact, and a concrete fix. Ask the model to prioritize correctness, security, edge cases, performance, and missing tests over personal style preferences.
Can AI write reliable unit tests?
AI can draft useful tests, but the developer still needs to confirm that the tests reflect the actual requirements and project conventions. Review their assertions, run them, and check that they test observable behavior rather than simply copying the implementation’s assumptions.
How do I prompt AI to understand a large codebase?
Ask it to trace one feature or behavior at a time. Request entry points, important files, data flow, dependencies, side effects, and related tests. When possible, require file paths or code evidence and ask it to separate confirmed facts from assumptions.
What is the best prompt format for a coding agent?
Give the agent a well-scoped task, repository context, constraints, acceptance criteria, and verification expectations. Ask it to inspect the code before editing, preserve unrelated behavior, keep its diff focused, and report checks it could not run.
Should I ask AI for a plan before it writes code?
For complex, multi-file, high-risk, or ambiguous work, yes. A plan lets you review assumptions, scope, and risks before implementation. For a small, clear task, you can ask for a brief plan or let the model make the change directly while still requiring tests and verification.
How should developers verify AI-generated code?
Inspect the diff and compare it with the requirements. Run the relevant automated tests, build, linter, and type checker where applicable, and test important manual scenarios. Review security-sensitive changes independently. Do not treat a model’s claim that code works as a substitute for verification: GitHub’s review guidance also recommends running tests and static analysis and checking that the code compiles and fits the project’s architecture.



