You are using Claude Code to accelerate software development. Your team uses it for code generation, refactoring, debugging, and documentation. You need to integrate it into your development workflow with custom slash commands, CLAUDE.md configurations, and understand when to use plan mode vs direct execution.

You’ve asked Claude to write a data migration script, but the initial output doesn’t correctly handle records with null values in required fields. What’s the most effective way to iterate toward a working solution?