kotlin-patterns SKILL.md skillA
kotlin-patterns from affaan-m/ecc is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add affaan-m/ecc/kotlin-patterns@git:20260607.4ad5756Pins git:20260607.4ad5756 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- affaan-m/ecc
- Path
.kiro/skills/kotlin-patterns/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260607.4ad5756, committed Jun 7, 2026
- Size
- 18,842 bytes
- Repository stars
- 299,696
- License
- MIT
Idiomatic Kotlin patterns, best practices, and conventions for building robust, efficient, and maintainable Kotlin applications with coroutines, null safety, and DSL builders.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Kotlin Development Patterns
Idiomatic Kotlin patterns and best practices for building robust, efficient, and maintainable applications.
## When to Use
- Writing new Kotlin code
- Reviewing Kotlin code
- Refactoring existing Kotlin code
- Designing Kotlin modules or libraries
- Configuring Gradle Kotlin DSL builds
## How It Works
This skill enforces idiomatic Kotlin conventions across seven key areas: null safety using the type system and safe-call operators, immutability via `val` and `copy()` on data classes, sealed classes and interfaces for exhaustive type hierarchies, structured concurrency with coroutines and `Flow`, extension functions for adding behaviour without inheritance, type-safe DSL builders using `@DslMarker` and lambda receivers, and Gradle Kotlin DSL for build configuration.
## Examples
**Null safety with Elvis operator:**
```kotlin
fun getUserEmail(userId: String): String {
val user = userRepository.findById(userId)
return user?.email ?: "unknown@example.com"
}
```
**Sealed class for exhaustive results:**
```kotlin
sealed class Result<out T> {
data class Success<T>(val data: T) : Result<T>()
…Read the whole file at its exact version.
How to install
mdr add affaan-m/ecc/kotlin-patterns@sha256:b98d254f9f0c1af6The line at the top of this page pins the label git:20260607.4ad5756, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_zdiycdi2bcq36ol6)
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Versions
The registry has recorded 1 version of this file, committed on Jun 7, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (18842 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
affaan-m/ecc · 299,696 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zdiycdi2bcq36ol6 GET https://markdownregistry.com/api/v1/resolve?ref=affaan-m/ecc/kotlin-patterns GET https://markdownregistry.com/api/v1/blob/b98d254f9f0c1af600fa9b096c015981ffa2b3ebe651893ad09c56c8fb8aa5e9
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.