Code Review

Systematic code review for Espen's TypeScript/Node.js projects.

Process

1. Understand scope — Read the changed files or the area under review:

```bash # For git changes git diff --name-only HEAD~1 git diff HEAD~1

# For a specific area find src/ -name "*.ts" -newer <reference-file> ```

1. Read the code — Use the read tool on each file. Don't guess.

1. Analyze against checklist — Score each category.

1. Report — Use the output format below.

Review Checklist

Correctness

• Logic handles edge cases (null, empty, boundary values)
• Error handling is explicit (no swallowed errors, no bare catch {})
• Async code handles rejection/cancellation properly
• Types are accurate (no unnecessary any, proper narrowing)

Security

• No secrets or credentials in code
• User input is validated/sanitized before use
• SQL queries use parameterized statements (no string interpolation)
• File paths are resolved safely (no path traversal)
• Auth checks are present where needed

Performance

• No N+1 queries or unbounded loops over large datasets
• Heavy operations are async or streamed (not blocking)
• Database queries use appropriate indexes
• Large responses are paginated or truncated

Maintainability

• Functions do one thing with clear names
• No magic numbers or hardcoded values that should be config
• Types and interfaces are defined (not inline object shapes)
• Dead code and unused imports are removed
• Comments explain why, not what

Project Conventions

• Follows existing patterns in the codebase
• File naming and directory structure is consistent
• Error messages are helpful for debugging
• Logging is appropriate (not too noisy, not silent on errors)

Output Format

## Code Review: [scope]

### Summary
One paragraph: what the code does, overall quality assessment.

### Issues

#### 🔴 Critical
- [file:line] Description and fix

#### 🟡 Important
- [file:line] Description and suggestion

#### 🔵 Minor
- [file:line] Nit or style suggestion

### What's Good
- Call out well-written code, good patterns, clever solutions

### Recommendations
- Prioritized list of changes, starting with most impactful

Common Patterns in Espen's Stack