OSS AI Skills Collection

A comprehensive collection of AI assistant skills (SKILL.md files) following the skillreg.dev specification, designed to help to use and extend open-source projects (for plugins). Note: we test the majority of them and improving based on asking to the agents to extend the skills based on their experience.

What is this?

This repository provides reusable skill definitions that can be loaded into AI coding assistants. Each skill encapsulates domain knowledge, best practices, and workflows for specific tasks in open-source development.

Available Skills

Extend

Skill	Description	Lines	Tags
Firefox Extension	Use when developing Firefox WebExtensions - Manifest V2/V3 configuration, WebExtension APIs, content security policy, web-ext CLI, cross-browser support with the polyfill, AMO submission, or debugging extensions	807	firefox, webextension, browser-extension, mozilla, amo, manifest-v3
GIMP Plugin	Use when developing GIMP 3.0+ plugins in Python 3 - procedure registration, image and layer operations, GEGL operations, PDB calls, dialogs and progress bars, file export, or batch processing plugins	1,169	python, gimp, image-processing, graphics, plugin, gegl
Kate Plugin	Use when developing C++ plugins for Kate - KTextEditor Framework, CMake/ECM, Qt threading, KDE plugin architecture	498	kate, kde, text-editor, plugin, c++, qt, kde-frameworks
KDE Plasmoid	Use when building KDE Plasma 6 widgets with a Python backend - plasmoid structure, metadata.json, QML UI, configuration system, plasmapkg2 packaging, KDE Store submission, or plasmoid testing and debugging	1,170	kde, plasma, plasmoid, widget, qml, qt, desktop
mGBA Scripting	Use when scripting mGBA emulator automation in Lua - console API, ROM and save state operations, frame callbacks, input handling, memory reading for cheats and RAM watches, sockets, or TAS and speedrunner tooling	1,001	lua, emulator, gba, gameboy-advance, scripting, memory-hacking
OpenCode Plugin	Use when developing plugins, tools, and extensions for the OpenCode agent - plugin contract and crash-prevention rules, ctx and event APIs, subagent lifecycle, MCP integration, SDK usage, REST API, testing, or publishing to npm	1,177	opencode, plugin, ai-agent, mcp, tool-development
OpenRCT2 Plugin	Use when developing OpenRCT2 plugins in TypeScript - plugin registration and game actions, window and widget UI, event hooks, park, map, ride and entity access, network API, storage, or ES5 runtime constraints	1,032	openrct2, plugin, javascript, typescript, game-modding, rollercoaster-tycoon
Playwright Visual Regression	Use when setting up visual regression testing with Playwright - toHaveScreenshot baselines, masking dynamic content, handling animations, full-page and element screenshots, cross-browser runs, CI integration, VUDA MCP tooling, or debugging flaky visual diffs	1,058	playwright, visual-regression, screenshot, testing, e2e, vuda, vrt
Thunderbird Extension	Use when developing Thunderbird MailExtensions - Manifest V2/V3 configuration, messenger.* APIs for accounts, messages, folders and compose, UI actions, message display scripts, Experiment APIs, ATN submission, or migration from legacy extensions	1,077	thunderbird, mailextension, email-extension, mozilla, atn, messenger-api
Vagrant	Use when managing Vagrant VM environments - Vagrantfile configuration, providers like VirtualBox and libvirt, provisioners (shell, Ansible, Chef, Puppet, Docker), multi-machine setups, networking, synced folders, custom boxes, plugins, or triggers	1,110	vagrant, virtualization, devops, virtualbox, infrastructure
Zed Editor	Use when developing Zed editor extensions in Rust - extension.toml manifest, LSP server integration, tree-sitter grammars and query files, MCP servers, slash commands, DAP debuggers, themes, snippets, or publishing to the Zed marketplace	1,125	zed, editor, extension, rust, wasm, tree-sitter, lsp, plugin

Frameworks

Skill	Description	Lines	Tags
aiohttp	Use when building Python async HTTP services or clients with aiohttp - web server routing, middleware, WebSocket, SSE, streaming, client sessions, pytest-aiohttp testing, or troubleshooting SSL and timeout issues	1,346	python, http, async, server, websocket, sse
android-apk-patch	Use when modifying Android APKs - decompiling and recompiling with apktool, editing smali or resources, handling split APKs, APK signing v1/v2/v3 and key rotation, resolving AAPT2 and dependency errors, patching GApps-dependent apps, or testing modified APKs on emulators, Redroid, or Waydroid	1,573	android, apk, patching, smali, signing, split-apk, gapps, frida, redroid, waydroid
BPCore Engine	Use when building GBA games with the BPCore Lua engine - entity, sprite and tilemap functions, SRAM save and load, link cable multiplayer protocol, camera and scrolling, or optimization patterns	881	lua, gba, game-engine, gameboy-advance
Celery	Use when running background tasks with Celery - worker and broker configuration (Redis, RabbitMQ, SQS), task definitions, chains and chords, Celery Beat periodic tasks, routing, retries, Flower monitoring, or testing tasks with pytest	1,288	python, task-queue, async, distributed, celery
Django	Use when building Django applications - security hardening, authentication and permissions, ORM optimization, PostgreSQL features, Django 6.0, migrations, testing, and ecosystem libraries	2,604	python, django, web-framework, async, hub
↳ django-admin	Use when customizing Django Admin - save_formset, get_search_results, formsets, queryset optimization, db_index, custom URLs	582	python, django, admin, orm, optimization
↳ django-transaction	Use when handling Django transactions and concurrency - atomic, select_for_update, on_commit, upserts, M2M ordering	496	python, django, transactions, concurrency, orm
Django Bolt	Use when building high-performance APIs with django-bolt - routing, JWT auth, msgspec serializers, WebSockets, SSE streaming, file uploads, ORM patterns, runbolt deployment, or migrating from DRF	2,211	python, django, bolt, api, rust, performance, async
Django Celery	Use when integrating Celery with Django - task definition and calling, django-celery-beat scheduling, worker deployment, Flower monitoring, testing tasks, batch processing, or choosing between cron and beat	682	python, django, celery, task-queue, periodic-tasks, django-celery-beat
Django HTMX	Use when building dynamic Django web apps with htmx - partial rendering, HTMX responses, querystring tag, CSP	487	django, htmx, python, web, frontend, partial-rendering
Django Ninja	Use when building Django REST APIs with django-ninja - Pydantic schemas, routers, CRUD endpoints, authentication, pagination, file uploads, async views, OpenAPI docs, or migrating from DRF	1,995	python, django, rest-api, pydantic, openapi, type-safe
Django Storages	Use when configuring django-storages for cloud file storage - STORAGES setting, Amazon S3, Google Cloud Storage and Azure backends, signed URLs, CDN and caching, multipart uploads, or storage testing	729	python, django, storage, s3, azure, gcs, cloud
Django TDD	Use when testing Django applications with pytest - TDD workflow, pytest-django setup, factory_boy and model-bakery fixtures, DRF API testing, mocking and patching, integration tests, or coverage	860	python, django, testing, pytest, tdd
Django Unfold	Use when theming the Django admin with django-unfold - settings and sidebar configuration, custom admin site, components and @display decorator, filters, actions, tabs, dark mode and styling, or Django 6.x compatibility	803	python, django, admin, unfold, theme, dashboard
django-allauth	Use when implementing Django authentication - local accounts, OAuth, email verification, MFA, OIDC, django-organizations	603	python, django, authentication, oauth, mfa, allauth, oidc
django-filter	Use when filtering Django querysets - FilterSet, custom filters, Django REST Framework integration, explicit fields	518	django, django-filter, filtering, django-rest-framework, queryset
httpx	Use when making HTTP requests in Python with httpx - sync and async clients, streaming, HTTP/2, connection pooling, retries, proxies, SSL verification, respx testing, or FastAPI and Django integration	906	python, http, async, client, network
LlamaIndex	Use when building RAG or LLM applications with LlamaIndex - data loaders, node parsing, vector stores, retrievers and rerankers, query engines, agents and workflows, streaming, or evaluation	1,231	python, llm, rag, llamaindex, ai, vector-database, openai, agents
Pydantic	Use when validating and serializing Python data with Pydantic v2 - models, field and model validators, constrained and special types, TypeAdapter, discriminated unions, BaseSettings, or FastAPI integration	1,389	python, validation, pydantic, serialization, settings
pygame	Use when building 2D games in Python with pygame - game loop and delta time, sprites and groups, collision detection, drawing and surfaces, events and input, sound and fonts, camera, or performance optimization	749	python, game-development, 2d-games, pygame, graphics
PyQt	Hub skill for PyQt/PySide - overview, comparison, project structure. Use when building cross-platform Qt desktop apps	416	python, qt, pyqt, pyside, gui, desktop, hub
↳ pyqt-core	Use when working with PyQt/PySide6 QtCore - signals, slots, properties, timers, settings, file I/O	487	python, qt, pyqt, core, signals
↳ pyqt-dialogs	Use when implementing PyQt/PySide6 dialogs - standard dialogs (QFileDialog, QMessageBox, QInputDialog, QColorDialog, QFontDialog), custom QDialog patterns, modal vs modeless dialogs, input validation, Qt 6 dialog APIs	518	python, qt, pyqt, dialogs, ui
↳ pyqt-multimedia	Use when adding multimedia to PyQt/PySide6 apps - audio and video playback with QMediaPlayer, camera capture with QCamera and QMediaCaptureSession, audio/video recording with QMediaRecorder, GStreamer backend setup, or codec and platform compatibility issues	1,071	python, qt, pyqt, multimedia, audio, video
↳ pyqt-styling	Use when styling PyQt/PySide6 widgets with QSS - selectors and pseudo-states, stylesheet application, common style properties, widget-specific styling, or building a dark theme	673	python, qt, pyqt, styling, qss, css, themes
↳ pyqt-testing	Use when testing PyQt/PySide6 applications with pytest-qt - qtbot fixture, signal/wait patterns, mouse/keyboard simulation, dialog testing, model/view testing, threaded code testing, or manual debugging techniques	464	python, qt, pyqt, testing, pytest
↳ pyqt-threading	Use when handling PyQt/PySide6 threading - QThread patterns, QThreadPool/QRunnable, thread safety rules, moveToThread, Qt Concurrent, QTimer, testing threaded code, lifecycle management	1,418	python, qt, pyqt, threading, concurrency
↳ pyqt-widgets	Use when building PyQt/PySide6 UIs with QtWidgets - display, input and container widgets, buttons, item views like QListWidget and QTableWidget, layout management, or event handling (mouse/keyboard events, event filters, shortcuts)	756	python, qt, pyqt, widgets, gui
pytest	Use when writing Python tests with pytest - fixtures, parametrization, markers, conftest layout, pytest-asyncio, pytest-django, coverage with pytest-cov, mocking with pytest-mock, parallel runs with xdist, or CI integration	1,527	python, testing, tdd, fixtures, unit-test
Qt C++	Use when developing desktop applications with Qt in C++ - CMake setup, signals and slots, QThread and QtConcurrent, QML integration, model/view programming, Qt5 to Qt6 migration, or windeployqt/macdeployqt/linuxdeployqt deployment	1,214	qt, c++, gui, desktop, qt6, cmake, cross-platform, qml
ratatui	Use when building terminal user interfaces in Rust with the ratatui crate - layout system, widget usage, input/event handling, app state architecture, TUI testing, or migrating between ratatui 0.29 and 0.30	1,829	rust, tui, terminal, cli, user-interface, ecosystem
SQLAlchemy	Use when working with SQLAlchemy 2.0 in Python - declarative models and relationships, queries and sessions, async engines with FastAPI, Alembic migrations, bulk operations, PostgreSQL query optimization, or debugging detached instances and N+1 queries	1,434	python, orm, database, sql, alembic, async
Tailwind CSS	Use when styling with Tailwind CSS v4 - @theme directive and design tokens, custom utilities and variants, dark mode, the Oxide engine, arbitrary values, framework integration, or migrating from v3	814	css, frontend, responsive, design-system, utility-first
TurboDRF	Use when building Django REST APIs with TurboDRF - model Meta configuration, role-based and field-level permissions, multi-tenant predicates, router wiring, management commands, settings, or troubleshooting	791	python, django, rest-api, turbodrf, permissions

Tool

Skill	Description	Lines	Tags
ast-grep	Use when doing structural code search and rewriting - ast-grep linting, refactoring, multi-language patterns	531	ast-grep, code-search, linting, refactoring, cli, ast
Docker	Use when working with Docker containers - Dockerfile, docker-compose, BuildKit, multi-stage builds, production, CI/CD	432	docker, docker-compose, containerization, deployment, ci-cd
Redis	Use when working with Redis - in-memory database, caching, pub/sub, sessions, rate limiting, RESP3, asyncio, Redis Stack	509	redis, database, caching, pub-sub, sessions, rate-limiting, resp3, async
SQLite	Use when working with SQLite in Python - schema design, transactions, FTS5 full-text search, JSON columns, PRAGMA tuning, backups and corruption recovery, or multi-instance concurrency	925	sqlite, database, sql, embedded, python
Waydroid	Use when setting up or troubleshooting Waydroid on Linux - installation and initialization, waydroid CLI, GPU and networking setup, GApps and Play certification, ADB integration, file sharing, or desktop environment integration	539	waydroid, android, container, linux, wayland, gapps

Languages

Skill	Description	Lines	Tags
Rust Common Pitfalls	Use when fixing Rust compiler errors and pitfalls - E0382/E0502/E0716 borrow-checker and move errors, test organization, coverage enforcement, thiserror design, panic elimination, or module splitting	1,432	rust, pitfalls, best-practices, common-errors, testing

Skill Format

Each skill follows the skillreg.dev specification:

---
name: skill-name
description: Short description of the skill
metadata:
  author: Author Name
  version: 1.0.0
  tags:
    - tag1
    - tag2
---

# Skill Title

[Markdown content with guidelines, examples, references...]

How to Use

1. Browse available skills in the contribute/, extend/, or frameworks/ directories
2. Copy the SKILL.md to your project or load it into your AI assistant
3. Reference the skill when asking for help with that domain
4. Customize as needed for your specific project