lang-carbon-dev
Foundational Carbon patterns covering memory safety, modern syntax, C++ interop, and Carbon idioms. Use when writing Carbon code or migrating from C++. This is the entry point for Carbon development.
lang-carbon-library-dev
Carbon language library development patterns including interoperability with C++, memory safety patterns, generic programming, build system integration, testing approaches, and documentation standards. Use when creating Carbon libraries, designing public APIs with safety and interoperability in mind, or porting C++ libraries to Carbon.
lang-clojure-dev
Foundational Clojure patterns covering functional programming, REPL-driven development, immutable data structures, and idiomatic code. Use when writing Clojure code, working with sequences and lazy evaluation, understanding macros, or needing guidance on functional programming patterns. This is the entry point for Clojure development.
lang-clojure-library-dev
Clojure library development patterns covering functional design idioms, namespace organization, deps.edn and Leiningen configuration, protocols and multimethods, spec for validation, testing with clojure.test, and publishing to Clojars. Use when creating Clojure libraries, designing functional APIs, or configuring Clojure projects for distribution.
lang-cpp-dev
Foundational C++ patterns covering core syntax, classes, templates, RAII, move semantics, and modern C++ features (C++11/14/17/20). Use when writing C++ code, understanding the type system, memory management, or needing guidance on which specialized C++ skill to use. This is the entry point for C++ development.
lang-cpp-library-dev
C++-specific library development patterns. Use when creating C++ libraries, designing header-only vs compiled libraries, configuring CMake for library targets, managing ABI stability and versioning, integrating with Conan/vcpkg, documenting with Doxygen, or testing with GoogleTest/Catch2. Extends meta-library-dev with C++ tooling and idioms.
lang-csharp-dev
Foundational C# patterns covering LINQ, async/await, nullable types, records, and pattern matching. Use when writing C# code or needing guidance on C# features. This is the entry point for C# development.
lang-csharp-library-dev
C#-specific library development patterns. Use when creating .NET class libraries, designing NuGet packages, configuring project files, implementing strong naming and versioning, writing XML documentation, unit testing with xUnit/NUnit, source generators, and multi-targeting. Extends meta-library-dev with .NET tooling and ecosystem patterns.
lang-cypher-dev
Foundational Cypher (Neo4j) patterns covering graph pattern matching, MATCH/CREATE/MERGE/DELETE operations, relationships, path patterns, aggregation, filtering, and common graph query patterns. Use when writing Cypher queries, modeling graph data, or needing guidance on graph database operations. This is the entry point for Cypher development.
lang-dotnet-dev
Foundational .NET patterns covering runtime, project structure, dependency injection, configuration, metaprogramming, and cross-platform development. Use when working with .NET projects or CLI tools. This is the entry point for .NET development.
lang-dotnet-library-dev
.NET/C#-specific library development patterns. Use when creating NuGet packages, configuring .csproj for libraries, implementing multi-targeting, designing public APIs, generating XML documentation, publishing to NuGet, or applying .NET library best practices. Extends meta-library-dev with .NET tooling and ecosystem patterns.
lang-elixir-dev
Foundational Elixir patterns covering modules, pattern matching, processes, OTP behaviors (GenServer, Supervisor), Phoenix framework basics, and functional programming idioms. Use when writing Elixir code, building concurrent systems, working with Phoenix, or needing guidance on Elixir development patterns. This is the entry point for Elixir development.
lang-elixir-library-dev
Elixir-specific library development patterns covering Hex package creation, OTP application design, Mix configuration, ExDoc documentation, typespecs, Dialyzer integration, and publishing best practices. Use when creating Elixir libraries, designing public APIs with OTP principles, managing dependencies, or publishing to Hex.pm. Extends meta-library-dev with Elixir ecosystem tooling.
elixir-architect
Use when designing or architecting Elixir/Phoenix applications, creating comprehensive project documentation, planning OTP supervision trees, defining domain models with Ash Framework, structuring multi-app projects with path-based dependencies, or preparing handoff documentation for Director/Implementor AI collaboration
lang-elm-dev
Foundational Elm development patterns covering The Elm Architecture (TEA), type-safe frontend development, and core language features. Use when building Elm applications, understanding functional patterns in web development, working with union types and Maybe/Result, or needing guidance on Elm tooling and ecosystem.
lang-elm-library-dev
Elm-specific library/package development patterns. Use when creating Elm packages, designing pure functional APIs, configuring elm.json for libraries, writing documentation comments, publishing to package.elm-lang.org, or managing semantic versioning in pure functional context. Extends meta-library-dev with Elm tooling and ecosystem patterns.
lang-erlang-dev
Foundational Erlang patterns covering OTP behaviors, fault-tolerant systems, distributed computing, pattern matching, processes, and supervision trees. Use when writing Erlang code, building concurrent systems, working with OTP frameworks, or developing distributed fault-tolerant applications. This is the entry point for Erlang development.
lang-erlang-library-dev
Erlang-specific library development patterns. Use when creating OTP libraries, designing public APIs with process patterns, configuring rebar3, managing application resources, publishing to Hex, or writing EDoc. Extends meta-library-dev with Erlang/OTP tooling and idioms.
lang-fsharp-dev
Foundational F# patterns covering functional-first programming, type providers, computation expressions, and domain modeling. Use when writing F# code, understanding functional patterns, working with type providers, or building .NET applications with F#. This is the entry point for F# development.
lang-fsharp-library-dev
F#-specific library development patterns. Use when creating F# libraries, designing functional APIs, configuring .fsproj and NuGet packages, writing XML documentation, ensuring C# interop, or publishing to NuGet. Extends meta-library-dev with F# tooling and functional idioms.
lang-go-dev
Foundational Go patterns covering types, interfaces, goroutines, channels, and common idioms. Use when writing Go code, understanding Go's concurrency model, or needing guidance on which specialized Go skill to use. This is the entry point for Go development.
lang-go-library-dev
Go-specific library/package development patterns. Use when creating Go libraries, designing public APIs with Go idioms, configuring go.mod, managing module versioning, publishing packages, or writing package documentation. Extends meta-library-dev with Go tooling and ecosystem practices.
lang-haskell-dev
Foundational Haskell patterns covering pure functional programming, type system, type classes, monads, and common idioms. Use when writing Haskell code, understanding pure functions, working with Maybe/Either, leveraging the type system, or needing guidance on functional programming patterns. This is the entry point for Haskell development.
lang-haskell-library-dev
Haskell-specific library development patterns. Use when creating Haskell libraries, designing type-safe public APIs, organizing Cabal/Stack projects, writing property-based tests with QuickCheck, generating Haddock documentation, or publishing to Hackage. Extends meta-library-dev with Haskell tooling and idioms.
lang-java-dev
Foundational Java patterns covering core syntax, object-oriented programming, generics, collections, streams, lambdas, and modern Java features. Use when writing Java code, understanding the type system, working with collections/streams, or needing guidance on which specialized Java skill to use. This is the entry point for Java development.
lang-java-library-dev
Java-specific library development patterns. Use when creating Java libraries, designing public APIs with interfaces and abstractions, configuring Maven/Gradle projects, managing dependencies, writing JUnit tests, documenting with Javadoc, or publishing to Maven Central. Extends meta-library-dev with Java tooling and ecosystem practices.
lang-kotlin-dev
Foundational Kotlin patterns covering null safety, coroutines, data classes, extension functions, and Kotlin idioms. Use when writing Kotlin code or needing guidance on Kotlin development. This is the entry point for Kotlin development.
lang-objc-dev
Foundational Objective-C patterns covering classes, protocols, categories, memory management (ARC/retain-release), blocks, GCD, and Foundation framework. Use when writing Objective-C code, working with Cocoa/Cocoa Touch APIs, bridging to Swift, or needing guidance on Apple platform development patterns. This is the entry point for Objective-C development.
lang-objc-library-dev
Objective-C-specific library and framework development patterns. Use when creating reusable frameworks, designing public APIs with protocols and categories, configuring Podspecs/Cartfiles/Package.swift, managing header visibility, implementing XCTest suites, writing HeaderDoc/appledoc documentation, or publishing to CocoaPods/Carthage/SPM. Extends lang-objc-dev with framework tooling and distribution practices.
lang-python-dev
Foundational Python patterns covering core syntax, idioms, type hints, testing, and modern tooling. Use when writing Python code, understanding Pythonic patterns, working with type hints, or needing guidance on which specialized Python skill to use. This is the entry point for Python development.
lang-python-library-dev
Python-specific library/package development patterns. Use when creating Python packages, designing public APIs with Python idioms, configuring pyproject.toml, managing dependencies with uv, publishing to PyPI, or writing package documentation. Extends meta-library-dev with Python tooling and ecosystem practices.
lang-roc-dev
Foundational Roc patterns covering platform/application architecture, records, tags, pattern matching, abilities, and functional idioms. Use when writing Roc code, understanding the platform model, or needing guidance on which specialized Roc skill to use. This is the entry point for Roc development.
lang-roc-library-dev
Roc-specific library and platform development patterns. Use when creating reusable Roc packages, developing custom platforms, organizing package modules, exposing public APIs, managing platform interfaces, or publishing packages. Extends meta-library-dev with Roc's unique platform system and module patterns.
benchmarking
Run and manage performance benchmarks with cargo xtask bench for facet-json, analyzing results with Markdown reports and comparing against serde_json baseline
managing-cargo-dependencies
Cargo.toml dependency management patterns for HASH workspace. Use when adding, updating, or removing dependencies, organizing Cargo.toml sections, configuring version pinning and default features, or managing public dependencies.
lang-rust-dev
Foundational Rust patterns covering core syntax, traits, generics, lifetimes, and common idioms. Use when writing Rust code, understanding ownership basics, working with Option/Result, or needing guidance on which specialized Rust skill to use. This is the entry point for Rust development.
lang-rust-docs-dev
Rust documentation practices for HASH codebase. Use when writing doc comments, documenting functions/types/traits/modules, creating error sections, using intra-doc links, following rustdoc conventions, or exploring crate APIs with cargo doc.
handling-rust-errors
HASH error handling patterns using error-stack crate. Use when working with Result types, Report types, defining custom errors, propagating errors with change_context, adding context with attach, implementing Error trait, or documenting error conditions in Rust code.
lang-rust-library-dev
Rust crate and library development patterns covering Cargo.toml for libraries, crate structure, module organization, rustdoc, publishing to crates.io, feature flags, semantic versioning, and API design. Use when creating a Rust library or crate, publishing to crates.io, documenting APIs with rustdoc, or managing library features and versions. This is the specialized skill for Rust library/crate development.
memory-safety-patterns
Implement memory-safe programming with RAII, ownership, smart pointers, and resource management across Rust, C++, and C. Use when writing safe systems code, managing resources, or preventing memory bugs.
lang-rust-profiling-eng
Profile and debug Rust code using valgrind and callgrind with nextest integration. Use when debugging crashes, segfaults, memory errors, analyzing instruction counts, cache behavior, or identifying performance bottlenecks.
lang-scala-dev
Foundational Scala patterns covering immutability, pattern matching, traits, case classes, for-comprehensions, and functional programming. Use when writing Scala code, understanding the type system, or needing guidance on which specialized Scala skill to use. This is the entry point for Scala development.
lang-sparql-dev
Foundational SPARQL patterns covering RDF querying, triple patterns, graph patterns, and semantic web fundamentals. Use when querying RDF data or working with knowledge graphs. This is the entry point for SPARQL development.
lang-sql-dev
Foundational SQL patterns for query writing, schema design, and dialect differences. Use when writing SQL queries, designing database schemas, understanding SQL syntax across PostgreSQL/MySQL/SQLite, or preparing SQL for conversion to other query languages. This is a meta-skill for SQL derivatives.
lang-swift-dev
Foundational Swift development patterns covering modern Swift syntax, SwiftUI, protocol-oriented programming, and Cocoa Touch frameworks. Use when writing Swift code, building iOS/macOS/watchOS/tvOS applications, working with SwiftUI or UIKit, understanding Swift concurrency, or needing guidance on Swift project structure.
lang-swift-library-dev
Swift package development with SPM. Use for Package.swift, public APIs, DocC, XCTest, XCFrameworks, and library publishing. Extends meta-library-dev.
lang-typescript-dev
Foundational TypeScript patterns covering types, interfaces, generics, utility types, and common idioms. Use when writing TypeScript code, understanding the type system, or needing guidance on which specialized TypeScript skill to use. This is the entry point for TypeScript development.
lang-typescript-library-dev
TypeScript-specific library/package development patterns. Use when creating npm packages, configuring package.json exports, setting up tsconfig.json for libraries, generating declaration files, publishing to npm, or configuring ESM/CJS dual packages. Extends meta-library-dev with TypeScript tooling and ecosystem patterns.
lang-typescript-patterns-dev
TypeScript development guidelines and patterns. Use this skill when writing TypeScript code, creating React components with TypeScript, configuring tsconfig.json, using advanced types like generics or utility types, or when the user asks about TypeScript best practices.
llm-mcp-builder-dev
Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).
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