Agents

Agents are specialized AI assistants configured for specific tasks and workflows. They enable focused tools with custom prompts, models, and tool access.

Agent Types

Primary Agents

Main assistants for direct interaction. Cycle through them via Tab key.

Build: Default agent with all tools enabled
Plan: Restricted agent for planning and analysis

Subagents

Specialized assistants invoked by primary agents or via @ mentions.

General: General-purpose for multi-step tasks
Explore: Fast codebase exploration

Configuration Methods

JSON Configuration

{
  "agent": {
    "review": {
      "mode": "subagent",
      "model": "anthropic/claude-sonnet-4",
      "tools": {
        "write": false,
        "edit": false
      }
    }
  }
}

Markdown Configuration

Place in ~/.config/opencode/agent/ or .opencode/agent/:

---
description: Reviews code for quality
mode: subagent
temperature: 0.1
tools:
  write: false
  edit: false
---
You are in code review mode. Focus on quality and security.

Configuration Options

Option	Purpose
`description`	Brief description (required)
`temperature`	Response randomness (0.0-1.0)
`maxSteps`	Limit agentic iterations
`model`	Override global model
`tools`	Enable/disable tools
`permission`	Tool access control
`mode`	`primary`, `subagent`, or `all`

Creating Agents

opencode agent create

Common Use Cases

Build agent: Full development
Plan agent: Analysis without changes
Review agent: Code review (read-only)
Debug agent: Investigation
Docs agent: Documentation writing

Rules Models