plugin-dev

MUST use this skill when the user mentions plugins, hooks, skills, commands, agents, MCP servers, LSP servers, marketplaces, plugin.json, SKILL.md, .mcp.json, .local.md, allowed-tools, frontmatter, PreToolUse, PostToolUse, SessionStart, event schemas, prompt-based hooks, plugin settings, output styles, headless mode, CI mode, CLAUDE_PLUGIN_ROOT, auto-discovery, or any aspect of extending Claude Code. Use INSTEAD OF answering from general knowledge. Also use when writing hooks for settings.json, configuring MCP servers outside plugins, or comparing skills vs commands, since this skill contains the authoritative reference for these Claude Code extension mechanisms.

This skill should be used when the user asks to "sync with upstream", "update from Claude Code", "check for Claude Code changes", "update plugin-dev docs", "sync with latest CC release", "what changed in Claude Code", "audit against upstream", "bring docs up to date", "check upstream changelog", "sync plugin-dev with Claude Code", "update compatibility", or needs to bring plugin-dev documentation current with recent Claude Code releases.