Skills, Subagents & MCP
With Claude Code running, this section teaches you to extend its capabilities. You'll learn how skills package reusable expertise, how subagents divide complex work, how MCP connects Claude to external tools, and how the settings hierarchy ties it all together.
Lessons 8-14 build your understanding of Claude Code's extensibility architecture from individual skills through full MCP integration.
Claude Code is a general agent; OpenCode is an open-source coding agent with the same three primitives under near-identical names. Skills live in .opencode/skills/<name>/SKILL.md (and OpenCode also reads .claude/skills/ for compatibility). Claude Code's "subagents" map to OpenCode's subagents invoked from primary agents (Build, Plan) via @mention. MCP servers are configured in opencode.jsonc under the mcp key rather than .mcp.json. Concepts transfer directly; only the file paths and config keys differ.