Create and edit Windows app manifest files (appxmanifest.xml) that define app identity, capabilities, and visual assets. Use when creating a Windows app manifest for any app type (GUI, console, CLI tool, service), adding Windows capabilities, updating app icons and assets, or adding execution aliases, file associations, protocol handlers, or other app extensions.

Framework-specific Windows development guidance for Electron, .NET (WPF, WinForms), C++, Rust, Flutter, and Tauri. Use when packaging or adding Windows features to an Electron app, .NET desktop app, Flutter app, Tauri app, Rust app, or C++ app.

Enable Windows package identity for desktop apps to access Windows APIs like push notifications, background tasks, share target, and startup tasks. Use when adding Windows notifications, background tasks, or other identity-requiring Windows features to a desktop app.

Diagnose and fix common Windows app packaging, signing, identity, and SDK errors. Use when encountering errors with MSIX packaging, certificate signing, Windows SDK setup, or app installation.

Create and manage code signing certificates for Windows apps and MSIX packages. Use when generating a certificate, signing a Windows app or installer, or fixing certificate trust issues.

Package a Windows app as an MSIX installer for distribution or testing. Use when creating a Windows installer, packaging an Electron/Flutter/.NET/Rust/C++/Tauri app for Windows, building an MSIX, distributing a desktop app, packaging a console app or CLI tool, or adding MSIX packaging to a build script or CI/CD pipeline.

Generate hierarchical AGENTS.md knowledge base for a codebase. Creates root + complexity-scored subdirectory documentation.

PowerPoint slide deck generation and management using python-pptx with YAML-driven content and styling - Brought to you by microsoft/hve-core

Video-to-GIF conversion skill with FFmpeg two-pass optimization - Brought to you by microsoft/hve-core

Decision-driven installer for HVE-Core with 6 clone-based installation methods, extension quick-install, environment detection, and agent customization workflows - Brought to you by microsoft/hve-core

Generates PR reference XML containing commit history and unified diffs between branches. Includes utilities to list changed files and read diff chunks. Use when creating pull request descriptions, preparing code reviews, analyzing branch changes, discovering work items from diffs, or generating structured diff summaries. - Brought to you by microsoft/hve-core

VS Code screenshot capture using Playwright MCP with serve-web for slide decks and documentation - Brought to you by microsoft/hve-core

Generate comprehensive pytest tests - use when generating tests, creating test suites, or testing Python code

Team code quality checklist - use for checking Python code quality, bugs, security issues, and best practices

Generate conventional commit messages - use when creating commits, writing commit messages, or asking for git commit help

A minimal skill example - use when learning the skill format

Score a repository's agentic legibility from repo-visible evidence only. Use when Codex needs to audit how easy a codebase is for coding agents to discover, bootstrap, validate, and navigate, especially for harness-engineering reviews, developer-experience audits, repo cleanup, or before/after comparisons after improving docs, tooling, or architectural constraints.

Comprehensive guide for building OpenAPI endpoints with chanfana - schema definition, request validation, CRUD operations, D1 database integration, and exception handling

Comprehensive guide for implementing feature flags and A/B tests using the Flags SDK (the `flags` npm package) and Vercel Flags (Vercel's feature flags platform, managed via dashboard or `vercel flags` CLI). Use when: (1) Creating or declaring feature flags with `flag()`, (2) Using Vercel Flags with `vercelAdapter()` or the `vercel flags` CLI (`add`, `list`, `enable`, `disable`, `inspect`, `archive`, `rm`, `sdk-keys`), (3) Setting up feature flag providers/adapters (Vercel, Statsig, LaunchDarkly, PostHog, GrowthBook, Hypertune, Edge Config, OpenFeature, Flagsmith, Reflag, Split, Optimizely, or custom adapters), (4) Implementing precompute patterns for static pages with feature flags, (5) Setting up evaluation context with `identify` and `dedupe`, (6) Integrating the Flags Explorer / Vercel Toolbar, (7) Working with feature flags in Next.js (App Router, Pages Router, Middleware) or SvelteKit, (8) Writing custom adapters, (9) Encrypting/decrypting flag values for the toolbar, (10) Any task involving the `flags`

Parallel test orchestrator. Runs all 9 test suites concurrently via Task sub-agents and mcp-call.mjs. Handles build, example setup, dev servers, agent launch, polling, retries, and result aggregation.