Languages skills

10,555 tagged Languages, measured the same way as everything else here.

Browse within: antigravity 99skills 95claude-code-skills 86ai-coding 82dotnet 70azure 69copilot 64sdk 64cursor-ai 58github-copilot 58foundry 50code 49android 48dotnet-skills 44

wax

97

christopherkarani/Wax

Skill Codex

Swift framework guidance for Wax on-device memory/RAG. Use when writing Swift code with the public Memory facade, experimental PhotoMemory / VideoMemory, BuiltInMultimodalEmbeddings, embedding providers, retrieval modes, or hybrid search. For agent operators using the Wax MCP server tools, use the separate wax-mcp…

not rated 788 +2 changed 2d ago A 68 tokens original Apache-2.0

writing-go

98

ardanlabs/kronk

Skill Claude Code

Apply modern Go syntax guidelines based on project's Go version. Use when user ask for modern Go code guidelines.

not rated 786 +9 yesterday A 24 tokens original Apache-2.0

mkosir/typescript-style-guide

Skill Claude CodeCodex

Apply, review, and explain discriminated unions in TypeScript. Use automatically for tasks involving mutually exclusive variants, invalid state prevention, exhaustiveness checking, variant-specific object properties, application state, function arguments, or React props.

not rated 784 +1 2d ago A 52 tokens original MIT

csharp-guidelines

100

dennisdoomen/CSharpGuidelines

Skill Claude Code

Apply the C# coding and design guidelines by Dennis Doomen when writing, reviewing, or refactoring C# code. Use this skill whenever you generate or evaluate C# to ensure it follows the established rules for class design, member design, maintainability, naming, performance, testability, and more.

not rated 776 1mo ago A 66 tokens

starlette

101

simonw/research

Skill Claude CodeCodex

Build async web applications and APIs with Starlette 1.0, the lightweight ASGI framework for Python. Use this skill whenever a user wants to create an async Python web app, REST API, WebSocket server, or ASGI application using Starlette. Triggers include mentions of 'Starlette', 'ASGI', async Python web frameworks, or…

not rated 766 +1 3d ago A 163 tokens

mindsdb/anton

Skill Claude CodeCodex

MANDATORY reading before writing ANY backend, API, server, or fullstack application code (createartifact types fullstack-stateless-app / fullstack-stateful-app, or anything that will be launched with launchbackend). Contains the complete hard contract: the canonical FastAPI+Mangum backend.py template, SECRETS…

not rated 752 changed 2d ago A 115 tokens original MIT

cpu-kernels

104

huggingface/kernels

Skill Claude Code ✓ vendor

Provides guidance for writing, optimizing, and benchmarking C++ CPU kernels with SIMD intrinsics (AVX2/AVX512) for the Hugging Face kernels ecosystem. Includes a two-phase workflow: Phase 1 correctness (generic → AVX2) and Phase 2 performance exploration (AVX512 with branching trial loop), runtime CPU dispatch, OpenMP…

not rated 739 yesterday A 89 tokens original Apache-2.0

design-patterns

105

decebals/claude-code-java

Skill Claude CodeCodex

Common design patterns with Java examples (Factory, Builder, Strategy, Observer, Decorator, etc.). Use when user asks "implement pattern", "use factory", "strategy pattern", or when designing extensible components.

not rated 727 +2 8d ago A 47 tokens original MIT

dhh

106

marckohlbrugge/37signals-skills

Skill Claude Code

Review Ruby/Rails code like DHH would - direct, opinionated, allergic to over-engineering. Use when the user runs /dhh or asks for a DHH-style review of a diff, file, or recent changes.

not rated 712 +1 2mo ago A 50 tokens

vybestack/llxprt-code

Skill Claude CodeCodex

Use this skill when writing or modifying tests in the llxprt-code repository. Covers mandatory TDD, behavioral testing, bun:test conventions and file naming, mock hygiene (no mock theater), and what never to test. Distilled from dev-docs/RULES.md, which remains the source of truth.

not rated 700 yesterday A 66 tokens original Apache-2.0

jac

108

jaseci-labs/jac

Skill Claude CodeCodex

Instructions for AI coding agents. Following this file installs the Jac programming language, wires Jac expertise into your tooling, and teaches you enough to work productively in a Jac codebase. Execute the steps in order and verify each one before moving on.

not rated 697 yesterday C 0 tokens original MIT

add-lint-rule

109

yoheimuta/protolint

Skill Claude Code

Add a new lint rule to protolint — every file that has to change, and how the official/unofficial, fixable and auto-disable behaviours are wired. Use when asked to add, implement, or write a new rule.

not rated 697 22d ago A 52 tokens original MIT

GolangExpert

110

val1813/kwcode

Skill Claude CodeCodex

A coding skill for Go, a programming language, with guidance on code style, concurrent work, error handling, and tests.

not rated 688 +1 3mo ago A 3 tokens

buzzer-re/Rikugan

Skill Claude CodeCodex

Write and execute Binary Ninja Python scripts — full API reference included.

not rated 672 2mo ago A 17 tokens original MIT

cnsplots

112

faridrashidi/cnsplots

Skill Codex

Create, revise, and troubleshoot publication-ready scientific plots in Python with cnsplots, including distribution, regression, heatmap, genomics, survival, set, flow, and multi-panel figures. Use when a user asks for cnsplots code, Cell/Nature/Science-style visualization, precise pixel-sized figures, statistical…

not rated 663 +2 yesterday A 79 tokens original BSD-3-Clause

mobx

113

MatrixAges/polywise

Skill OpenCode

Guides state management implementation using MobX + tsyringe. Triggered when handling data models, state logic, or Store architecture.

not rated 659 2mo ago A 30 tokens original MIT

bnlearn

114

erdogant/bnlearn

Skill Claude CodeCodex

Use this skill when working with bnlearn, a Python library for Bayesian networks, probabilistic graphical models, causal discovery, parameter learning, structure learning, inference, sampling, and directed acyclic graphs (DAG).

not rated 644 +1 7d ago A 46 tokens

ProvableHQ/sdk

Skill Claude CodeCodex

Use when writing tutorial documentation or create-leo-app examples for the Provable SDK (@provablehq/sdk). Covers how to structure runnable templates, write tutorial-style docs, and handle Node.js vs web runtime differences.

not rated 633 2d ago A 51 tokens GPL-3.0

rails-conventions

116

rootstrap/rails_api_base

Skill Claude Code

Rootstrap Rails conventions. Use when writing, reviewing, or editing any Rails code — controllers, models, migrations, routes, views, mailers, initializers, locale files, or Rails config. Covers routing, ActiveRecord, migrations, i18n, time zones, mailers, assets, Bundler groups, and logging.

not rated 631 8d ago A 71 tokens original MIT

litdata

117

Lightning-AI/litData

Skill Claude Code

Expert use of the LitData library and work on its codebase. Use when writing or reviewing code that calls litdata (StreamingDataset, StreamingDataLoader, StreamingRawDataset, optimize, map, CombinedStreamingDataset, ParallelStreamingDataset, TokensLoader, serializers, typed media wrappers…

not rated 612 changed 2d ago A 305 tokens original Apache-2.0

alpaca-trade-api-sdk

118

alpacahq/alpaca-trade-api-js

Skill Claude CodeCodex

Integrate and build on the @alpacahq/alpaca-trade-api TypeScript SDK for the Alpaca Trading and Market Data APIs (the unified Alpaca client, ergonomic order builders, normalized market-data shapes, pagination, typed errors, resilience, and real-time streaming). Use when writing or reviewing code that imports…

not rated 601 2d ago A 123 tokens original Apache-2.0

datafusion-python

119

apache/datafusion-python

Skill Claude CodeCodex ✓ vendor

Use when the user is writing datafusion-python (Apache DataFusion Python bindings) DataFrame or SQL code. Covers imports, data loading, DataFrame operations, expression building, SQL-to-DataFrame mappings, idiomatic patterns, and common pitfalls.

not rated 600 +1 yesterday A 54 tokens original Apache-2.0

new-binding

120

luainkernel/lunatik

Skill Claude CodeCodex

Create a new Lunatik kernel module binding (lib/luaX.c) with its build wiring, docs and tests. Use when adding a Lua binding for a kernel API or subsystem.

not rated 599 yesterday A 40 tokens GPL-2.0

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: