Developer Tools & Repos Agent Skills for HTTP / API

Forces the AI to detect, confirm, and remember the host operating system before any command execution, file operation, or path construction.

Patterns for integrating OSC (Open Sound Control) protocol into a BitFocus Companion module using the `osc` npm package.

Manage package.json dependencies, scripts, and metadata with best practices.

Prevent destructive package operations by blocking --force flags and requiring human approval.

Apply when designing commands, lifecycle steps, or processing loops that run amid crashes, restarts, and retries.

Apply when introducing a new internal API while old callers still exist.

Apply when concurrent actors might write to the same file, branch, key, or state object.

Apply when designing types, reviewing a function signature, or writing code in any statically-typed language.

Provides comprehensive guidance for Express.js framework including routing, middleware, request handling, templating, and API development.

Choose Rust types for operating system paths across the Codex repository.

Investigate why code has its current shape using read-only repository history, issue tracking, user-scoped documents, observability, error…

Intelligent refactor command. Triggers: refactor, refactoring, cleanup, restructure, extract, simplify, modernize.

Implement 2D browser games with Phaser. Use when the user wants a Phaser, TypeScript, and Vite stack for scenes, gameplay systems…

Backend development guide for the Phoenix AI observability platform (Strawberry GraphQL, SQLAlchemy async, FastAPI).

REST API development for Phoenix. Use when adding, modifying, or reviewing endpoints in src/phoenix/server/api/routers/v1/.

TypeScript conventions and patterns for any TypeScript code in the Phoenix monorepo — including js/packages/, app/, and any other TS…

PHPicker, PhotosPicker, photo selection, limited library access, presentLimitedLibraryPicker, save to camera roll, PHPhotoLibrary…

Tools, patterns, and utilities for creating music with code.

Pixel art w/ era palettes (NES, Game Boy, PICO-8).

Apply advanced pixel art techniques including dithering, palette optimization, shading, antialiasing, and color theory.

Use when building game UI (menus, HUD, dialogue box, settings/save screens) on top of Pixi'VN with an external JS framework (React, Vue)…