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Browse and install thousands of AI Agent skills in the Killer-Skills directory. Supports Claude Code, Windsurf, Cursor, and more.

This directory brings installable AI Agent skills into one place so you can filter by search, category, topic, and official source, then install them directly into Claude Code, Cursor, Windsurf, and other supported environments.

2071 available skills

kotlin-patterns

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affaan-m

Idiomatic Kotlin patterns, best practices, and conventions for building robust, efficient, and maintainable Kotlin applications with coroutines, null safety, and DSL builders.

116.8k
0
Developer

product-lens

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affaan-m

Use this skill to validate the why before building, run product diagnostics, and convert vague ideas into specs.

116.8k
0
Developer

laravel-plugin-discovery

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affaan-m

Discover and evaluate Laravel packages via LaraPlugins.io MCP. Use when the user wants to find plugins, check package health, or assess Laravel/PHP compatibility.

116.8k
0
Developer

subagent-driven-development

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obra

subagent-driven-development is a technique that leverages fresh subagents for independent tasks, ensuring spec compliance and code quality through a two-stage review process.

111.2k
0
Productivity

bun-runtime

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affaan-m

bun-runtime is a fast all-in-one JavaScript runtime and toolkit that includes a runtime, package manager, bundler, and test runner, designed to simplify and accelerate development workflows.

105.8k
0
Developer

crosspost

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affaan-m

crosspost is a skill that distributes content across multiple social platforms, adapting it for each platform's native conventions and limitations.

105.8k
0
Developer

deep-research

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affaan-m

deep-research is a skill that utilizes firecrawl and exa MCPs to synthesize findings from multiple sources, delivering comprehensive reports with source attribution.

105.8k
0
Developer

systematic-debugging

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obra

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes

70.9k
0
Productivity

springboot-security

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affaan-m

Spring Security best practices for authn/authz, validation, CSRF, secrets, headers, rate limiting, and dependency security in Java Spring Boot services.

60.6k
0
Developer

springboot-tdd

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affaan-m

Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.

60.6k
0
Developer

swift-concurrency-6-2

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affaan-m

Swift 6.2 Approachable Concurrency — single-threaded by default, @concurrent for explicit background offloading, isolated conformances for main actor types.

60.6k
0
Developer

swift-protocol-di-testing

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affaan-m

Protocol-based dependency injection for testable Swift code — mock file system, network, and external APIs using focused protocols and Swift Testing.

60.6k
0
Developer