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Found 631 Skills
Effect-TS (Effect) guidance for TypeScript. Use when building, refactoring, reviewing, or explaining Effect code, especially for: typed error modeling (expected errors vs defects), Context/Layer/Effect.Service dependency wiring, Scope/resource lifecycles, runtime execution boundaries, schema-based decoding, concurrency/scheduling/streams, @effect/platform APIs, Effect AI workflows, and Promise/async migration.
Apply production-ready Instantly SDK patterns for TypeScript and Python. Use when implementing Instantly integrations, refactoring SDK usage, or establishing team coding standards for Instantly. Trigger with phrases like "instantly SDK patterns", "instantly best practices", "instantly code patterns", "idiomatic instantly".
Use when writing, reviewing, or refactoring Java code to enforce baseline conventions for imports, nullability, immutability, exceptions, resource handling, naming, and concurrency.
Guides when to abstract vs duplicate code. Use this skill when creating shared utilities, deciding between DRY/WET approaches, or refactoring existing abstractions.
Refactors code following Ousterhout's design principles. Analyzes complexity, creates prioritized refactoring plan, and executes with safety-first approach. Optimized for Vite/React, Tauri/Rust, Zustand stack.
Hexagonal architecture layering for Java services with strict boundaries. Trigger: When structuring Java apps by Domain/Application/Infrastructure, or refactoring toward clean architecture.
Refactors legacy Java code to modern patterns and best practices. Use when modernizing old Java code, converting to Java 8+ features, refactoring legacy applications, applying design patterns, improving error handling, extracting methods/classes, converting to streams/Optional/records, or migrating from old Java versions. Works with pre-Java 8 code, procedural Java, legacy frameworks, and outdated patterns.
Comprehensive vitest testing patterns covering test structure, AAA pattern, parameterized tests, assertions, mocking, test doubles, error handling, async testing, and performance optimization. Use when writing, reviewing, or refactoring vitest tests, or when user mentions vitest, testing, TDD, test coverage, mocking, assertions, or test files (*.test.ts, *.spec.ts).
Apply the Tell Don't Ask (TDA) principle when reviewing, writing, or refactoring object-oriented code. Use this skill whenever the user asks about OOP design, mentions getters/setters, wants to review a class for encapsulation issues, asks how to move logic closer to data, or asks why code feels "procedural" despite using classes. Also trigger when the user asks to refactor code that queries an object's state before making decisions externally. This skill should kick in for any code review or design question involving data access patterns, encapsulation, or how objects should collaborate.
Spring Boot 3 patterns for configuration, DI, and web services. Trigger: When building or refactoring Spring Boot 3 applications.
State-machine driven iterative planning and execution for complex coding tasks. Cycle: Explore → Plan → Execute → Reflect → Re-plan. Filesystem as persistent memory. Use for multi-file tasks, migrations, refactoring, failed tasks, or anything non-trivial.
[Testing] Autonomous subagent variant of code-review. Use when reviewing code changes, pull requests, or performing refactoring analysis with focus on patterns, security, and performance.