kotlin-best-practices
Kotlin coding standards including null safety, Either error handling, coroutines, and Exposed ORM patterns. Use when writing Kotlin code, reviewing code quality, or learning project patterns.
How do I install this agent skill?
npx skills add https://github.com/c0x12c/ai-toolkit --skill kotlin-best-practicesIs this agent skill safe to install?
- Gen Agent Trust Hubpass
The skill provides legitimate Kotlin coding standards and best practices. No security issues, malicious code, or suspicious behavior were detected.
- Socketpass
No alerts
- Snykpass
Risk: LOW · No issues
What does this agent skill do?
Kotlin Best Practices — Quick Reference
Null Safety
!! is banned. Use ?., ?:, or null check for smart cast.
See code-patterns.md for all null safety examples.
Either Error Handling
Managers return Either<ClientException, T> -- never throw. Controllers unwrap with .throwOrValue().
See code-patterns.md for manager + controller examples.
Enum Usage
Never hardcode strings when an enum exists. Use EnumName.VALUE.value everywhere.
See code-patterns.md for enum definition and usage patterns.
Exposed ORM Patterns
Extend UUIDTable, use text() not varchar(). Always filter deletedAt.isNull(). Soft delete via timestamp update, never hard delete.
See code-patterns.md for table, query, and soft delete examples.
Transaction Rules
Reads use db.replica, writes use db.primary. Multi-table writes go in one transaction block -- all succeed or all rollback.
See code-patterns.md for transaction examples.
Conversion Pattern
Put companion object { fun from(entity) } inside Response DTOs. Never create separate mapper files.
See code-patterns.md for the full pattern.
What to Avoid
!!-- always use?.,?:, or null check@Suppress-- fix the root cause- Throwing exceptions -- return
Either.left()instead VARCHARin SQL -- useTEXT- Hardcoded strings for enum values
Tablebase class -- useUUIDTable- Field injection -- use constructor injection
How can the creator link this skill?
Add the canonical catalog link to the repository README so users can inspect current installs and available audits. The publishing guide covers the complete discovery path.
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