opencode-multi-model

Launch multiple AI models in tmux sessions. Available as:

• OpenCode Plugin
• Standalone CLI
• Project-level tool

Installation

As OpenCode Plugin

Add to your OpenCode config (opencode.json):

{
  "plugin": ["opencode-multi-model"]
}

As Standalone CLI

# Using bunx (no install)
bunx opencode-multi-model open my-session -m openai/gpt-5.2 anthropic/claude-3-5-sonnet

# Or install globally
bun install -g opencode-multi-model
opencode-multi-model open my-session -m openai/gpt-5.2

As Project Tool

If you installed it via bun and want to use it as a project tool, import it from the package:

// .opencode/tools/multi-model.ts
import { openTool as open, closeTool as close } from "opencode-multi-model"
export { open, close }

If you are developing this package locally and want to test it in a project without publishing, import via relative paths:

// .opencode/tools/multi-model.ts
import { openTool } from "../../src/tools/open"
import { closeTool } from "../../src/tools/close"
export { openTool as open, closeTool as close }

Usage

Plugin Usage

Open a session:

Use multi-model-open tool:
sessionName: my-session, models: ["openai/gpt-5.2", "anthropic/claude-3-5-sonnet"]

Close a session (using tool):

call tool multi-model-close with sessionName: my-session

Close a session (using manual command):

tmux kill-session -t my-session && rm -rf ~/.local/share/opencode/multi-model/my-session && git worktree prune && git branch -D $(git branch --format='%(refname:short)' --list 'opencode/my-session/*')

CLI Usage

Open a session:

# Basic usage
opencode-multi-model open my-session -m openai/gpt-5.2 anthropic/claude-3-5-sonnet

# With custom binary (via flag)
opencode-multi-model open my-session -m openai/gpt-5.2 -b kilo

# With custom binary (via env)
export OPENCODE_MULTI_MODEL_BINARY=kilo
opencode-multi-model open my-session -m openai/gpt-5.2

Close a session (CLI command):

# Close and cleanup worktrees
opencode-multi-model close my-session

Close a session (manual command):

tmux kill-session -t my-session && rm -rf ~/.local/share/opencode/multi-model/my-session && git worktree prune && git branch -D $(git branch --format='%(refname:short)' --list 'opencode/my-session/*')

Help:

opencode-multi-model --help
opencode-multi-model open --help
opencode-multi-model close --help

Configuration

Custom Binary

By default uses opencode. To use kilo instead:

Via environment variable:

export OPENCODE_MULTI_MODEL_BINARY=kilo

Via CLI flag:

opencode-multi-model open my-session -m openai/gpt-5.2 -b kilo

Priority: CLI flag > Environment variable > Default ("opencode")

Requirements

• tmux
• git
• opencode or kilo binary
• Bun runtime

Development

For local development and testing without publishing:

# Install dependencies
bun install

# Build
bun run build

# Run tests
bun test

# Test CLI locally
bun dist/cli.js open test-session -m openai/gpt-5.2
bun dist/cli.js close test-session

Architecture

├── src/
│   ├── index.ts               # Plugin entry point
│   ├── cli.ts                 # CLI entry point
│   ├── types.ts               # Shared TypeScript types
│   ├── core/
│   │   ├── index.ts           # Core exports
│   │   ├── launch.ts          # Launch session logic
│   │   ├── close.ts           # Close session logic
│   │   └── utils.ts           # Helper functions
│   └── tools/
│       ├── open.ts            # Open tool definition
│       └── close.ts           # Close tool definition
├── tests/
│   └── multi-model.test.ts    # Tests
├── package.json
├── tsconfig.json
└── README.md

License

MIT