BREAKING
Unified Claude Code Extensions Guide
Four Core Extension Points
Skills
slash commands
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Reusable knowledge/workflows
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.claude/commands/*.md
Subagents
agent teams
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Specialized isolated agents
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.claude/agents/*.md
Hooks, MCP and Plugins
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Hooks: event scripts
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MCP: external DB/API
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Plugins: /plugin install
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For Intermediate to Advanced Users
AI NEWS BLITZ
A new all-in-one guide repository for Claude Code's main extensions has just been released.