x-cmd

Value validation and environment detection tool for Shell scripts. Validates input types (integers, floats, IPs), compares file ages, detects runtime environments (TTY, WSL, Termux, Cygwin). Supports batch checking with exit code 0 success / 1 failure. Trigger when user needs to validate input types, detect terminal environment, check file freshness, verify variable states, or perform environment suitability checks (suitable_pkg/suitable_advise). Keywords: validate, check, verify, is, integer, float, positive, negative, range, IP address, file age, interactive, WSL, Termux, environment detection, unset variable, batch check.

**IMPORTANT**: Before using any `x <mod>` command, you MUST load x-cmd first: `. ~/.x-cmd.root/X` Then you can: - Explore with `x nihao --llmstxt` - Discover skills via `x skill` x-cmd provides 600+ portable software and development tools (jq, nodejs, python, etc.). Use `x <env|pixi> use <pkg>` to install and use any package instantly. After loading x-cmd, packages in x-cmd/pixi's local bin will be automatically available in PATH. Browse x-cmd website for more usage and skills: https://www.x-cmd.com/llms.txt

x-env is x-cmd's environment and package management module for installing and managing third-party software, programming language runtimes, and command-line tools. Use this skill when: installing or managing runtimes (node, python, go, bun, java, rust); installing CLI tools (jq, yq, fzf, himalaya, claude-code); managing multiple software versions (specify versions, switch versions); cleaning up unused packages; viewing installed software paths or dependencies; asking how to install software; temporarily using software in current shell session (try); permanently installing software to user environment (use); upgrading installed software versions; running scripts with specific software versions. This is the core package manager in x-cmd ecosystem.

This skill provides comprehensive Git and code hosting platform management tools through x-cmd CLI, including GitHub, GitLab, Codeberg, Forgejo integration, and Git hooks management. This skill should be used when users need to manage Git repositories, work with code hosting platforms, automate Git workflows, or configure Git hooks from command line interfaces.

RFC (Request for Comments) document query tool providing access to Internet protocol standards. Use this skill whenever the user needs to look up, search, read, or learn about RFC documents. Covers: list RFCs (x rfc ls), view by number (x rfc 791), search (x rfc : http), and AI summary (x rfc :: tls). Triggered by queries like "RFC 791", "TCP standard", "HTTP protocol", "TLS specs", "SMTP RFC", "what is RFC 1918?", or any Internet protocol standard lookup.

Unified compression and decompression tool. Core Scenario: When AI needs to handle various archive formats (zip, tar, gz, 7z, rar, zst, xz, bz2) in the terminal. x-cmd provides concise aliases and zero-dependency installation.

x-mirror is a comprehensive mirror source management tool for various package managers. Use this skill whenever users need to configure, switch, or query package manager download mirrors. This skill handles: setting up and switching mirrors for package managers (pip, npm, brew, apt, go, cargo, gem, etc.), viewing available mirror options, checking current mirror configuration, restoring default official sources, and optimizing download speeds in China regions. Triggered by queries like "set npm mirror", "change pip source", "npm mirror speed", "pip Tsinghua mirror", "brew Chinese mirror", "x mirror apt", "how to speed up npm download", "configure pip mirror", "switch npm registry", or any request related to package manager mirrors, registry settings, or download acceleration. This skill is essential for developers in China or anyone needing to optimize package download speeds.

This skill provides comprehensive system administration and monitoring tools through x-cmd CLI, including process management, macOS system utilities, network configuration, disk health monitoring, and storage analysis. This skill should be used when users need to perform system administration tasks, monitor system performance, manage network configurations, or troubleshoot system issues from command line interfaces.

Software installation assistant using x-cmd's install module. Use this skill whenever the user needs to query software installation methods, get installation commands, or understand how to install various software packages. Covers: getting installation commands (x install --cat <software>), listing supported software (x install --ll), and more. Triggered by queries like "how to install node", "docker installation command", "install python", "show me git install command", or any software installation lookup.

This skill provides comprehensive network administration and diagnostic tools through x-cmd CLI, including network scanning with Nmap, ARP table management, DNS configuration, routing table analysis, and enhanced ping utilities. This skill should be used when users need to perform network diagnostics, troubleshoot connectivity issues, analyze network topology, or monitor network performance from command line interfaces.

This skill provides comprehensive security assessment and vulnerability management tools through x-cmd CLI, including network reconnaissance with Shodan, vulnerability scanning with OSV, and known exploited vulnerability tracking with KEV. This skill should be used when users need to perform security assessments, vulnerability research, network reconnaissance, or security monitoring from command line interfaces.

This skill provides access to various knowledge search tools through x-cmd CLI, including Hacker News, Wikipedia, DuckDuckGo search, RFC documents, Project Gutenberg books, and Stack Exchange. This skill should be used when users need to search for technical information, browse online knowledge bases, or access documentation from command line interfaces.

React Native and Expo development guide covering components, styling, animations, navigation, state management, forms, networking, performance optimization, testing, native capabilities, and engineering (project structure, deployment, SDK upgrades, CI/CD). Use when: building React Native or Expo apps, implementing animations or native UI, managing state, fetching data, writing tests, optimizing performance, deploying to App Store/Play Store, setting up CI/CD, upgrading Expo SDK, or configuring Tailwind/NativeWind.

Patterns and architectures for autonomous Claude Code loops — from simple sequential pipelines to RFC-driven multi-agent DAG systems.

Verification loop for Django projects - migrations, linting, tests with coverage, security scans, and deployment readiness checks before release or PR.

Write-time code quality enforcement using Plankton — auto-formatting, linting, and Claude-powered fixes on every file edit via hooks.

Instinct-based learning system that observes sessions via hooks, creates atomic instincts with confidence scoring, and evolves them into skills/commands/agents. v2.1 adds project-scoped instincts to prevent cross-project contamination.