Get OpenAI Codex CLI's opinion on code, bugs, or implementation. Use when you want a second AI perspective during coding sessions.

Get Gemini CLI's opinion on code, architecture, or implementation. Use when you want a second AI perspective during coding sessions.

JUnit 5 core testing patterns with AAA structure, test organization, and coverage standards

Use when jUnit extensions including custom extensions, rules, and conditional test execution.

Use when jUnit fundamentals including annotations, assertions, and test lifecycle for Java testing.

Maven integration testing with Failsafe plugin, IT naming conventions, and profile configuration

Use when jUnit parameterized tests with various value sources and test factories.

Integrate Jupiter aggregator for swaps - API usage, route optimization, slippage handling, and frontend/bot implementation. Use when building swap UIs or trading bots.

- [Execution Enforcement](#execution-enforcement)

Best practices for using just command runner and task automation in development workflows.

This skill provides patterns for setting up just (command runner) in projects. Use PROACTIVELY when creating build systems, setting up new repos, or when the user asks about just/justfile configuration. Covers both simple single-project repos and monorepos with hierarchical justfile modules.

Just command runner for saving and running project-specific commands

Level 3 patterns - test-smart, deploy, migrate, logs, status (production systems)

Five-level maturity progression - assessment criteria, upgrade paths, YAGNI enforcement

Level 1 patterns - test-watch, integration-test, complexity, loc, duplicates, slowtests

Ralph research agent for discovering global youth justice cases and advocacy campaigns

Expert JVZoo integration specialist for building backend systems that handle JVZoo purchases, create user accounts, manage software licenses, and process IPN notifications. Use when implementing JVZoo product licensing, account creation workflows, payment processing, refund handling, or connecting software products to JVZoo marketplace by product ID.

Identify and exploit vulnerabilities in JSON Web Token (JWT) implementations, including algorithm confusion attacks, secret key cracking, signature bypass, and claim manipulation. JWTs are widely used

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Эксперт k6 нагрузочного тестирования. Используй для performance testing, load scenarios и stress tests.

Load testing tool with installation and test execution commands.

Reference the Kubernetes API. Useful for understanding what is possible via the Kubernetes REST API.

kafka-consumer-implementation

Expert in Apache Kafka, Event Streaming, and Real-time Data Pipelines. Specializes in Kafka Connect, KSQL, and Schema Registry.

kafka-integration-testing

MCP server integration for Kafka operations with Claude Desktop and SpecWeave. Use when configuring Kafka MCP servers, connecting Claude to Kafka topics, or choosing between MCP implementations.

kafka-producer-implementation

kafka-schema-management

kafka

Expert agent for Kaggle API authentication, dataset management, and running Kaggle notebooks on Texas Tech HPCC. Specializes in connecting Jupyter notebooks to Kaggle API and submitting to code competitions. Always checks VPN connection first before HPCC operations.

Kani is a bit-precise model checker for Rust that proves properties about code rather than just testing examples. Unlike tests that check specific inputs, Kani exhaustively verifies all possible input

Expert in Kanidm modern identity management system specializing in user/group management, OAuth2/OIDC, LDAP, RADIUS, SSH key management, WebAuthn, and MFA. Deep expertise in secure authentication flows, credential policies, access control, and platform integrations. Use when implementing identity management, SSO, authentication systems, or securing access to infrastructure.

Operate and troubleshoot Kapso projects. Manage webhooks, debug message delivery, inspect API errors, and run health checks. Use when diagnosing issues, setting up webhooks, or investigating message failures.

Configure Karabiner-Elements keyboard remapping using Goku EDN syntax. Use when creating keybindings, layers, simlayers, app-specific shortcuts, or modifying karabiner.edn.

Creates Karibu unit tests for Vaadin views.

Validates KCL Crossplane compositions with comprehensive checks including formatting, syntax validation, and rendering tests. Automatically activates when working with KCL files, Crossplane compositions, or before commits touching infrastructure/base/crossplane/configuration/. Prevents CI failures and catches critical bugs like the mutation pattern.

This skill should be used when developing, debugging, or fixing KDE Plasma 6 widgets (plasmoids). Triggers on QML widget issues, compactRepresentation not showing, system tray integration, Kirigami.Icon usage, plasmoidviewer testing, and Plasma 6 widget development. Covers common issues like emoji not rendering, widget not appearing in panel, and proper imports for Plasma 6.

Research current online documentation and information. Use when working with external libraries, frameworks, APIs, services, version-specific issues, trends, or any topic where LLM training cutoff may impact accuracy. Guides when to use websearch, codesearch, or webfetch.

Associative memory for reflection and skillful action

This skill should be used when performing fast iterative kernel debugging, running time-bound kernel sessions to detect specific log signals or test kernel behavior. Use for rapid feedback cycles during kernel development, boot sequence analysis, or feature verification.

Keyboard accessibility, focus management, and shortcuts.

Multi-tenant Keycloak authentication theming with realm-specific design systems

Cross-platform secure credential storage using system keychains

Builds content APIs with KeystoneJS, the Node.js headless CMS with GraphQL. Use when creating admin UIs and APIs with automatic CRUD operations, relationships, access control, and TypeScript support.

Techniques for expanding seed keywords and clustering by topic and intent. Use when building keyword lists, planning content calendars, or identifying topic clusters for pillar content strategy.

Use when users need help with kube-hetzner configuration, debugging, or questions - acts as an intelligent assistant with live repo access

Expert children's book writer creating delightful, engaging books for ages 2-9. Specializes in rhyming books, stories, songs with proper values, educational content, and age-appropriate language. Crafts books that captivate young readers while teaching important life lessons.

Use when defining stopping rules for projects, avoiding sunk cost fallacy, setting objective exit criteria, deciding whether to continue/pivot/kill initiatives, or when users mention kill criteria, exit ramps, stopping rules, go/no-go decisions, project termination, sunk costs, or need disciplined decision-making about when to quit.

Expert KillBill administrator for managing billing, subscriptions, invoices, and overdue states. Provides ready-to-use commands via Traefik DNS for tenant management, catalog uploads, test clock manipulation, and overdue testing workflows.

Create a Kind cluster in Docker-in-Docker environment