Kotlin Fundamentals
CheckedMaster Kotlin basics – syntax, data types, functions, classes – to build robust backend applications.
Install on your platform
Showing Claude Code. One command installs this skill into any of the agents below.
- 1
Run this in your project
terminal$ npx skills add pluginagentmarketplace/custom-plugin-kotlin --skill kotlin-fundamentals -a claude-code Uses the open-source
skillsCLI and needs Node.js. Add-gto install it for your user instead of this project.
What we know about this skill
Publisher
pluginagentmarketplace
Taken from the source listing. We haven't verified who controls this account.
Install target
Live repository
Not pinned. Installing fetches whatever the repository holds at the time you run the command.
Automated safety checks
This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.
Declares what it does: passed
SKILL.md parses and declares a name and a description.
SKILL.md exists, its frontmatter parses, and it declares a name and a description.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
No pipe-to-shell or download-and-run installers.
No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned pluginagentmarketplace/custom-plugin-kotlin at cc703d8871.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.
- Commit
- cc703d8871
- Scanned
- 4 files, 124 lines
About this skill
What it does
This skill provides foundational knowledge and capabilities related to Kotlin, a modern programming language. It enables AI agents to understand and generate Kotlin code snippets, explain core concepts like data classes and null safety, and assist in basic development tasks. The skill aims to equip agents with the ability to reason about and interact with Kotlin-based projects.
When to use it
- Code Generation: Generate simple Kotlin functions or classes based on a description of their functionality.
- Code Explanation: Explain what a given piece of Kotlin code does, line by line.
- Debugging Assistance: Identify potential errors in provided Kotlin code snippets.
- Learning Resource: Provide explanations and examples for developers learning the basics of Kotlin.
Key capabilities
- Kotlin syntax understanding
- Data class generation & explanation
- Null safety concepts
- Basic function creation
- Code snippet analysis
Example prompts
- "Write a Kotlin data class to represent a 'Book' with properties for title, author, and publication year."
- "Explain what this Kotlin code does:
val result = numbers.map { it * 2 }.filter { it > 10 }" - “How do I handle null values safely in Kotlin?”
Tips & gotchas
This skill is best suited for introductory-level Kotlin tasks. It may struggle with complex or highly specialized Kotlin codebases.