opencode-primitives

---
name: opencode-primitives
description: Reference OpenCode docs when implementing skills, plugins, MCPs, or config-driven behavior.
---

## Purpose
Use this skill whenever OpenWork behavior is implemented directly on top of OpenCode primitives (skills, plugins, MCP servers, opencode.json config, tools/permissions). It anchors decisions to the official OpenCode documentation and keeps terminology consistent in the UI.

## Doc Sources (Always cite when relevant)
- Skills: https://opencode.ai/docs/skills
- Plugins: https://opencode.ai/docs/plugins/
- MCP servers: https://opencode.ai/docs/mcp-servers/
- Config (opencode.json, locations, precedence): https://opencode.ai/docs/config/

## Key Facts To Apply
### Skills
- Skill files live in `.opencode/skills/<name>/SKILL.md` or global `~/.config/opencode/skills/<name>/SKILL.md`.
- Skills are discovered by walking up to the git worktree and loading any matching `skills/*/SKILL.md` in `.opencode/` or `.claude/skills/`.
- `SKILL.md` requires YAML frontmatter: `name` + `description`.
- Name rules: lowercase alphanumeric with single hyphens (`^[a-z0-9]+(-[a-z0-9]+)*$`), length 1-64, must match directory name.
- Description length: 1-1024 characters.
- Access is governed by `opencode.json` permissions (`permission.skill` allow/deny/ask).

### Plugins
- Local plugins live in `.opencode/plugins/` (project) or `~/.config/opencode/plugins/` (global).
- npm plugins are listed in `opencode.json` under `plugin` and installed with Bun at startup.
- Load order: global config, project config, global plugins dir, project plugins dir.

### MCP Servers
- MCP servers are defined in `opencode.json` under `mcp` with unique names.
- Local servers use `type: "local"` + `command` array; remote servers use `type: "remote"` + `url`.
- Servers can be enabled/disabled via `enabled`.
- MCP tools are managed via `tools` in config, including glob patterns.
- OAuth is handled automatically for remote servers; can be pre-registered or disabled.

### Config (opencode.json)
- Supports JSON and JSONC.
- Precedence order: remote `.well-known/opencode` -> global `~/.config/opencode/opencode.json` -> custom path -> project `opencode.json` -> `.opencode/` directories -> inline env overrides.
- `.opencode` subdirectories are plural by default (`agents/`, `commands/`, `plugins/`, `skills/`, `tools/`, `themes/`), with singular names supported for compatibility.

## When to Invoke
- Adding or adjusting OpenWork flows that reference skills, plugins, MCP servers, or OpenCode config.
- Designing onboarding guidance that mentions skill/plugin installation, config locations, or permission prompts.
- Implementing UIs that surface OpenCode primitives (skills tab, plugin manager, MCP toggles).

## Usage
Call `skill({ name: "opencode-primitives" })` before implementing or documenting any OpenWork behavior that maps to OpenCode primitives.