Developer Tools & Repos Agent Skills for ChatGPT

Scaffold a production-ready Expo React Native app with working screens, navigation, and optional Clerk auth.

Use when implementing over-the-air (OTA) updates with Expo Updates.

Express.js middleware patterns, routing, error handling, security, and production best practices.

Work with OpenEXR files — inspect channels, extract beauty/RGB passes, decode cryptomatte segmentation (material, object, asset), convert…

Use when implementing widgets, Live Activities, Control Center controls, or app extensions - comprehensive API reference for WidgetKit…

Use when implementing widgets, Live Activities, or Control Center controls - enforces correct patterns for timeline management, data…

Connect external agents and MCP hosts (Claude, Claude Desktop, Claude Code, ChatGPT custom MCP apps, Codex, Cursor, Claude Cowork, VS Code…

Connect to external tools via MCP (GitHub, databases, APIs)

Use when adding new error messages to React, or seeing "unknown error code" warnings.

Generates DDD Factory for PHP 8.4. Creates factories for complex domain object instantiation with validation and encapsulated creation…

Audits fallback and graceful degradation strategies.

Accelerates Git rebasing by detecting and dropping already squash-merged commits with byte-level verification.

Build Python APIs with FastAPI, Pydantic v2, and SQLAlchemy 2.0.

Use when FastAPI validation with Pydantic models.

Build MCP servers in Python with FastMCP framework to expose tools, resources, and prompts to LLMs.

This skill should be used when the user wants to build an "MCP app", add "interactive UI" or "widgets" to an MCP server, "render…

Comprehensive best practices for React Native and Expo applications.

Design game feature architecture before writing code.

code generation script writing implementation production-ready features

Generate comprehensive plans for new features by exploring the codebase, synthesizing approaches, validating with spikes, and decomposing…

Create, refine, and benchmark agent skills.