Best Practices

Best Practices

General best practices and development guidelines.

Code Review Checklist

Functionality

• Code implements requirements
• Edge cases handled
• Error handling complete
• Logging appropriate

Readability

• Variable names clear
• Functions have single responsibility
• Complex logic commented
• Code formatting consistent

Maintainability

• No duplicate code
• Good modularization
• Clear interface definitions
• Easy to extend

Performance

• No obvious performance issues
• Resource usage reasonable
• Caching strategy appropriate
• Queries optimized

Security

• Input validated
• Output escaped
• Permissions checked
• Sensitive data protected

Testing

• Unit test coverage
• Edge tests complete
• Integration tests adequate
• E2E tests pass

Git Commit Convention

Commit Message Format

<type>(<scope>): <subject>

<body>

<footer>

Type Reference

Examples

# Simple commit
git commit -m "feat: add user registration"

# Detailed commit
git commit -m "feat(api): add rate limiting

- Add token bucket rate limiter
- Configure limits per endpoint
- Add rate limit headers

Closes #123"

Debugging Tips

1. Binary Search Location

git bisect start
git bisect bad HEAD
git bisect good <stable-commit>
git bisect run bun test

2. Log Debugging

logger.debug("Processing user", { userId, action })
logger.info("User created", { userId, email })
logger.warn("Rate limit exceeded", { ip, limit })
logger.error("Database error", { error: err.message })

3. Breakpoint Debugging

function process(data: Data) {
  debugger // Pause here
  return transform(data)
}

4. Type Checking

bun tsc --noEmit
grep -r ": any" src/

Performance Optimization

1. Measure First

const start = performance.now()
await expensiveOperation()
const duration = performance.now() - start
if (duration > 100) {
  logger.warn(`Slow operation: ${duration}ms`)
}

2. Batch Processing

// Batch processing
await Promise.all(items.map((item) => process(item)))

// Avoid serial processing
for (const item of items) {
  await process(item)
}

3. Caching

const cache = new Map<string, Data>()

async function getData(key: string): Promise<Data> {
  if (cache.has(key)) {
    return cache.get(key)!
  }
  const data = await fetchFromDB(key)
  cache.set(key, data)
  return data
}

Security Checklist

Pre-Release Check

• No hardcoded keys
• Environment variables configured
• Input validation complete
• Output escaped
• Permission checks in place
• Error handling secure
• Dependencies vulnerability-free
• HTTPS enforced

Sensitive Operations

• Passwords hashed
• Token expiration reasonable
• Sensitive data encrypted
• Logs sanitized
• Security headers configured

Documentation Standards

Code Comments

/**
 * Validates user input data.
 *
 * @param data - User data to validate
 * @returns Validation result with validity flag and error messages
 * @throws {ValidationError} When data format is invalid
 *
 * @example
 * ```ts
 * const result = validateUserData({ name: 'John', email: 'john@example.com' });
 * if (result.valid) {
 *   // Process valid data
 * }
 * ```
 */
function validateUserData(data: unknown): ValidationResult {
  // Implementation
}

README Structure

# Project Name

## Introduction
One-line project description

## Quick Start
Installation and usage instructions

## Features
Main features list

## API
API documentation link

## Contributing
How to contribute

## License
Open source license

Team Collaboration

Code Ownership

• Each module has a clear owner
• Notify owner before modifications
• Discuss major changes first

Branch Strategy

main (production) <- dev (development) <- feature/* (features)

Code Review Flow

1. Create PR
2. Assign reviewers
3. Respond to feedback
4. Get approval
5. Merge code

Continuous Improvement

Regular Reviews

• Weekly code quality review
• Monthly documentation updates
• Quarterly technical debt cleanup

Knowledge Sharing

• Document learned patterns (/learn)
• Update skill documentation
• Share best practices

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