Prompt Library

You are an expert code reviewer. Review the following code for bugs, security issues, performance problems, and style violations. Provide specific, actionable feedback for each issue found.

```
{code}
```

Focus on: 1) Security vulnerabilities, 2) Performance bottlenecks, 3) Logic errors, 4) Code s...

Write comprehensive unit tests for the following function. Include edge cases, error handling, and happy path scenarios. Use {framework} testing framework with {language}.

```
{code}
```

Cover: normal cases, edge cases (empty input, null, boundary values), error cases, and any side effects.

Explain the following code as if I were a junior developer. Break down:
1. What this code does at a high level
2. Each function's purpose and how it works
3. The data flow and control flow
4. Any interesting patterns or techniques used
5. Potential improvements or gotchas

```
{code}
```

Refactor the following code to improve readability, maintainability, and performance. Follow SOLID principles and the specific requirements below:

Original code:
```
{code}
```

Requirements:
- Use modern {language} features and conventions
- Extract reusable functions/classes where appropriate
- A...

Design a REST API endpoint for the following use case:

{description}

Include:
- HTTP method and URL path
- Request/response schemas (JSON)
- Authentication requirements
- Error response format
- Rate limiting considerations
- Example curl commands for each operation

I'm encountering this bug in my {language} project. Help me diagnose and fix it.

Error message:
```
{error}
```

Relevant code:
```
{code}
```

What I tried:
{tried}

Please identify: 1) Root cause, 2) Fix, 3) Why it happened, 4) How to prevent it in the future.

Optimize the following SQL query for performance. Analyze the execution plan and suggest improvements.

```sql
{query}
```

Database: {db_type}
Table sizes: ~{row_count} rows

Consider:
- Index usage and missing indexes
- JOIN optimization
- Subquery vs CTE tradeoffs
- WHERE clause sargability
- EXP...

Write clear, concise documentation for the following code/function. Follow the Google docstring style and include practical examples.

```
{code}
```

Include: description of what it does, parameters and their types, return value and type, exceptions raised, usage examples, notes/edge cases.

Write an Architecture Decision Record (ADR) for the following decision:

Title: {title}
Context: {context}
Decision: {decision}

Include:
- Status (proposed/accepted/deprecated/superseded)
- Context and problem statement
- Decision drivers
- Considered options with pros/cons
- Decision outcome
- Con...

Generate an optimized Dockerfile for a {language} application with the following requirements:

{requirements}

Use multi-stage builds, minimize layer count, follow security best practices, and include a Docker Compose file if any services are needed.

Write a comprehensive blog post about {topic}.

Style: {tone} (professional/casual/technical)
Length: ~{word_count} words
Audience: {audience}

Structure:
- Compelling headline (3-5 options)
- Engaging introduction with hook
- Main body with clear sections and examples
- Actionable takeaways
- Concl...

Write a professional email for the following context:

Purpose: {purpose}
Recipient: {recipient}
Key points: {key_points}
Tone: {tone}

Include:
- Catchy subject line (3 options)
- Professional greeting
- Clear body with one key point per paragraph
- Call to action
- Professional signature
- Follow-...

Create a step-by-step tutorial for {topic}.

Prerequisites: {prerequisites}
Target audience: {audience}
Estimated time: {duration}

Structure each step with:
- Clear goal statement
- Code blocks with syntax highlighting (if applicable)
- Expected output
- Common pitfalls
- Verification check

End wi...

Write a descriptive Git commit message for the following changes.

Files changed: {files}
Summary of changes: {changes}

Follow Conventional Commits format:
<type>: <description>

Types: feat, fix, docs, style, refactor, perf, test, chore, ci

Include:
- Short description (50 chars max)
- Optional b...

Write a Product Requirements Document (PRD) for:

Product: {product_name}
Problem: {problem}
Target users: {users}

Include:
1. Executive summary
2. Problem statement
3. User personas
4. Functional requirements (must-have, nice-to-have)
5. Non-functional requirements (performance, security, accessib...

Design a data cleaning pipeline for the following dataset:

Source: {source}
Columns: {columns}
Issues identified: {issues}

Generate code to:
1. Handle missing values (mean/median/mode/drop)
2. Remove duplicates
3. Fix data types
4. Handle outliers (IQR/z-score)
5. Standardize formats (dates, strin...

Perform exploratory data analysis on the following dataset.

Data description: {description}
Columns: {columns}
Target variable: {target}

Generate code for:
1. Summary statistics (mean, median, std, quartiles)
2. Missing value analysis and visualization
3. Distribution plots for numeric variables
4...

Help me choose the right statistical test for my analysis.

Research question: {question}
Data type: {data_type}
Sample size: {n}
Groups being compared: {groups}
Assumptions met: {assumptions}

Suggest the appropriate statistical test and provide:
1. Test name and type (parametric/non-parametric)
2....

Analyze the following A/B test results and provide recommendations.

Control group: {control_metrics}
Treatment group: {treatment_metrics}
Sample size (control): {n_control}
Sample size (treatment): {n_treatment}
Metric: {metric}
Duration: {duration} days

Calculate:
1. Statistical significance (p-v...

Suggest feature engineering transformations for machine learning on the following dataset:

Dataset description: {description}
Column types: {column_types}
Model type: {model_type}

Generate ideas for:
1. Numeric features: log, square, interactions, bins
2. Categorical features: encoding strategies,...

Write the opening scene of a {genre} story based on the following prompt:

Premise: {premise}
Setting: {setting}
Main character: {character}
Tone: {tone}

Create:
- A hook that grabs attention in the first paragraph
- Atmospheric world-building
- Character introduction with distinctive voice
- A hin...

Design a {component_type} UI component with the following specifications:

Framework: {framework}
State variants: {states}
Accessibility requirements: {a11y}

Generate:
1. Component API (props interface)
2. Accessibility attributes and keyboard navigation
3. Responsive behavior (mobile/tablet/deskto...

Design a database schema for:

Application: {app_name}
Entities: {entities}
Relationships: {relationships}
Estimated data volume: {volume}

Generate:
1. Entity-Relationship Diagram (text-based)
2. CREATE TABLE statements with proper types
3. Indexes for query performance
4. Foreign key constraints
5...

Review the following pull request changes:

PR Title: {title}
Files changed: {files}
Description: {description}

For each file, check:
1. Does the code follow the project's style guide?
2. Are there any logical errors or edge cases?
3. Is error handling adequate?
4. Are tests added/updated?
5. Is th...

Summarize the following meeting notes into actionable items:

Meeting notes:
{notes}

Format as:
- Key decisions made
- Action items (with owner and deadline)
- Open questions / blocked items
- Next meeting date and agenda
- Stakeholders who need updates