opencode-extensions

Use when extending OpenCode — MCP servers, plugins/hooks, custom commands, agent skills, rules/AGENTS.md, or migrating from Claude Code. Covers the full extensibility layer.

Model	Source
sonnet	pack: opencode

Full Reference

OpenCode Extensions

OpenCode’s extensibility layer: MCP servers (external tools), plugins (hooks/events), custom commands (slash commands), agent skills (reusable instructions), and rules (AGENTS.md). Current version: v1.2.10 (Feb 2026).

Quick Ref

I want to…	File
Add an MCP server (local or remote)	`reference/mcp-servers.md`
Configure MCP OAuth	`reference/mcp-servers.md`
Disable or scope MCP tools	`reference/mcp-servers.md`
Write a plugin / hook into events	`reference/plugins.md`
Register a custom tool via plugin	`reference/plugins.md`
Inject env vars into shell executions	`reference/plugins.md`
Create a slash command	`reference/custom-commands.md`
Use template variables / shell injection	`reference/custom-commands.md`
Build an agent skill (SKILL.md)	`reference/agent-skills.md`
Control skill permissions	`reference/agent-skills.md`
Set up AGENTS.md or project rules	`reference/rules-and-agents-md.md`
Load external instruction files	`reference/rules-and-agents-md.md`
Migrate from Claude Code	`reference/claude-code-migration.md`

Reference Index

reference/mcp-servers.md — Local + remote MCP config, OAuth flows, tool control, troubleshooting
reference/plugins.md — Plugin structure, context object, all hooks, custom tools, env injection
reference/custom-commands.md — File format, frontmatter fields, template variables, JSON alternative
reference/agent-skills.md — Skill structure, SKILL.md frontmatter, discovery, permissions
reference/rules-and-agents-md.md — AGENTS.md search order, instructions config, remote URLs
reference/claude-code-migration.md — Auto-recognized files, compat env vars, migration checklist

Usage: Read the reference file matching your current task from the index above. Each file is self-contained with code examples and inline gotchas.

Announcement

┏━ 🔌 opencode-extensions ━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ MCP servers, plugins, custom commands, skills, and rules for OpenCode ┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛