Recommended: universal installer
Agent Instructions
--backend local or -Backend local for local data storage. See Local-First Setup. See Support Tiers.
What the installer writes
The MCP entry:
http://127.0.0.1:3211/api/mcp. Restart opencode, or start a new session, so it loads the server.
Each command file is the skill body with a description frontmatter field. OpenCode does not gain SessionStart, UserPromptSubmit, or Stop hooks from this install. Call crystal_recall when you need past context.