Developer Tools & Repos Agent Skills for Microsoft Copilot

How to handle failures correctly in Kotlin coroutines and Flow on Android — exception propagation under structured concurrency, launch vs…

Make bounded changes in the repository's observed stack and conventions without opportunistic refactoring; escalate only a demonstrated…

Use when implementing or debugging ANY network request, API call, or data fetching.

Framework (OSS). Folder structure for a new Expo app. Use when scaffolding or laying out a new Expo project with Expo Router, or deciding…

Submit feedback on an Expo skill—or Expo itself—and control bundled anonymous usage telemetry (off by default / opt-in).

This is the preferred pattern for all objects that support it.

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 building high-performance async Python APIs with FastAPI and Pydantic V2.

Build, test, and deploy Python MCP servers.

Architecture, build, linking, and tag rules for an Nx TypeScript monorepo with hexagonal architecture, npm workspaces, and strict module…

Audit a Claude skill for quality, context-efficiency, and best-practice compliance — classify its archetype, score the four principles and…

Finds what's rotting in a repo and returns a prioritized diagnosis — dead code first, then god files / hotspots / hardcoded paths / stale…

Create, run, and publish single-file C# programs without project files.

Finds and ranks callers that could move from services/llm-gateway to PostHog/ai-gateway.

Fish 4.9.x on this machine — the login shell: house style, language, builtins, config layout, startup cost, and verified caveats.

Scans all TypeScript/types in a PR or branch diff for soft types (`any`, unnecessary `null`/`undefined`, optional fields that are…

C++ coding standards based on the C++ Core Guidelines (isocpp.github.io).

Use when asked to design iOS or Android mobile app screens, create mobile UI, spec mobile flows, or produce screen designs for a native app.

Write and review Kotlin event-processing code using kotlinx.coroutines Flow operators instead of hand-rolled state machines, and structure…

This skill provides general Flutter/Dart development guidance - implementing features, fixing bugs, managing pubspec dependencies and…