effect-ts
Effect-TS guide for TypeScript, v4 default with v3 support. Use when writing, debugging, or reviewing Effect code across errors, concurrency, services, streams, and schema, or when code imports from 'effect' or any '@effect/*' package.
erc-8004
Build with ERC-8004 Trustless Agents - on-chain agent identity, reputation, validation, and discovery on EVM chains. Use when registering agents on-chain, building agent reputation, or using the Agent0 SDK. Triggers on ERC-8004 and Agent0.
founder-playbook
Decision validation and thinking frameworks for founders. Use to pressure-test a decision, validate next steps, or sanity-check an approach - "should I", "help me think through", "what am I missing". Covers fundraising, customers, runway.
foundry-solidity
Build and test Solidity contracts with Foundry. Use when developing Ethereum contracts, writing Forge tests, deploying with scripts, or debugging with Cast/Anvil. Triggers on forge, cast, anvil, foundry.toml, *.t.sol, or *.s.sol.
acpx-faq
Run coding agents (codex, claude, agy/Antigravity) through the acpx ACP CLI - the headless lane outside a herdr pane (no HERDR_ENV). Use before launching or prompting a subagent, and when a command fails, a session is not found, or a prompt is lost.
ghostwriter
Write content by interviewing the user instead of drafting - extract their material through questions, then assemble the piece from their own words. Use when the user needs to write something for an audience or mentions "ghostwriter".
go-dev
Opinionated Go setup with golangci-lint v2, gofumpt, gotestsum, golang-migrate, and just. Use when starting a Go project, configuring lint, format, test, coverage or CI, writing a Justfile, wiring migrations, or leaving a Makefile workflow.
grill-me
Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".
herdr-faq
Launch and drive coding agents (codex, claude, agy) through the Herdr CLI; requires a herdr pane (HERDR_ENV=1). Use before starting or prompting a herdr subagent, and when a herdr command fails or an agent seems stuck or silently lost a prompt.
i-have-adhd
Shape output for a reader with ADHD: lead with the next action, number multi-step work, restate state, suppress tangents, make wins visible. Use when the user types /i-have-adhd or asks for ADHD mode; stays on until "stop adhd mode".
lance-format
Deep reference for Lance v13 columnar format, its Rust crates, and pylance - file encodings, table format, indexes, schema evolution, time travel. Use when building on the Lance crates or reading .lance datasets, not the LanceDB product.
okf-project-knowledge-base
Durable project knowledge as Git-native OKF bundles (docs/knowledge/, one concept per file, with provenance and trust tiers). Use to record a decision, finding, or rule that must outlive the session. Not session state or agent instructions.
react-three-game
Build and edit React Three Game scenes using WebGPU rendering, React Three Fiber composition, prefab components and the editor API for agents.
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
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
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
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
django-allauth
Use when implementing Django authentication - local accounts, OAuth, email verification, MFA, OIDC, django-organizations
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
django
Use when building Django applications - security hardening, authentication and permissions, ORM optimization, PostgreSQL features, Django 6.0, migrations, testing, and ecosystem libraries
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
llama-index
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
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
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
pyqt
Use when building cross-platform desktop apps with PyQt6 or PySide6 - hub for installation, project structure, signals and slots basics, and pointers to widgets, styling, dialogs, threading, and testing sub-skills
pyqt-core
Use when working with PyQt/PySide6 QtCore - signals, slots, properties, timers, settings, file I/O
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
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
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
pyqt-threading
Use when handling PyQt/PySide6 threading - QThread patterns, QThreadPool/QRunnable, thread safety rules, moveToThread, Qt Concurrent, QTimer, testing threaded code, lifecycle management
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)
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
qt-cpp
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
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
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, or PostgreSQL query optimization
tailwind
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
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
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
kate-plugin
Use when developing C++ plugins for Kate - KTextEditor Framework, CMake/ECM, Qt threading, KDE plugin architecture
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
mgba
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
opencode
Use when developing plugins, tools, and extensions for OpenCode v1 - plugin contract, crash-prevention rules, ctx/event APIs, subagent lifecycle (abort races, compaction, orphan detection), MCP integration, testing patterns, or publishing to npm
openrct2
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
django-admin
Use when customizing Django Admin - save_formset, get_search_results, formsets, queryset optimization, db_index, custom URLs
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
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
django-filter
Use when filtering Django querysets - FilterSet, custom filters, Django REST Framework integration, explicit fields
django-htmx
Use when building dynamic Django web apps with htmx - partial rendering, HTMX responses, querystring tag, CSP
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
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
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