By name: kotlin-fundamentals description: Kotlin language fundamentals - syntax, null safety, data classes, extensions version: "1.0.0" sasmp_version: "1.3.0" bonded_agent: 01-kotlin-fundamentals bond_type: PRIMARY_BOND
execution: timeout_ms: 30000 retry: max_attempts: 3 backoff: exponential initial_delay_ms: 1000
parameters: required: - name: topic type: string validation: "^(syntax|null_safety|data_classes|extensions|collections|idioms)$" optional: - name: kotlin_version type: string default: "2.0"
logging: level: info events: [skill_invoked, topic_loaded, error_occurred]
Kotlin Fundamentals Skill
Master Kotlin programming fundamentals with production-ready patterns.
Topics Covered
Null Safety
// Safe call + Elvis
val name = user?.name ?: "Anonymous"
// requireNotNull for validation
requireNotNull(user) { "User required" }
Data Classes
data class User(val id: Long, val name: String) {
init { require(name.isNotBlank()) }
}
Scope Functions
| Function | Context | Returns | Use Case |
|---|---|---|---|
let |
it | Lambda result | Null-safe transforms |
apply |
this | Same object | Object configuration |
run |
this | Lambda result | Object scope + result |
also |
it | Same object | Side effects |
Troubleshooting
| Issue | Resolution |
|---|---|
| NPE despite null check | Check platform types from Java |
| Smart cast fails | Use local variable or let |
Usage
Skill("kotlin-fundamentals")