oh-my-opencode-mal

A lightweight, powerful agent orchestration plugin for OpenCode

Six divine beings emerged from the dawn of code, each an immortal master of their craft await your command to forge order from chaos and build what was once thought impossible.

Slimmed-down fork of oh-my-opencode - focused on core agent orchestration with low token consumption.

Table of Contents

• 📦 Installation
  • For Humans
  • For LLM Agents
• 🏛️ Meet the Pantheon
  • 01. Orchestrator: The Embodiment Of Order
  • 02. Explorer: The Eternal Wanderer
  • 03. Oracle: The Guardian of Paths
  • 04. Librarian: The Weaver of Knowledge
  • 05. Designer: The Guardian of Aesthetics
  • 06. Fixer: The Last Builder
• 🎚️ Presets
  • Switching Presets
  • OpenAI Preset
  • Antigravity via CLIProxy Preset
  • Author's Preset
• 🧩 Skills
  • Simplify
  • Agent Browser
  • Cartography
  • Skills Assignment
• 🔌 MCP Servers
  • MCP Permissions
  • Configuration & Syntax
• 🛠️ Tools & Capabilities
  • Tmux Integration
  • Background Tasks
  • LSP Tools
  • Code Search Tools
  • Formatters
• ⚙️ Configuration
  • Files You Edit
  • Prompt Overriding
  • Plugin Config (oh-my-opencode-mal.json)
• 🗑️ Uninstallation
• 🙏 Credits
• 📄 License

📦 Installation

For Humans

Run the interactive installer:

bunx oh-my-opencode-mal@latest install

Or use non-interactive mode:

bunx oh-my-opencode-mal@latest install --no-tui --antigravity=yes --openai=yes --tmux=no

After installation, authenticate with your providers:

opencode auth login
# Select your provider → Complete OAuth flow
# Repeat for each provider you enabled

Once authenticated, run opencode and ping all agents to verify all agents respond.

💡 Tip: Models are fully customizable. The installer sets sensible defaults, but you can assign any model to any agent. Edit ~/.config/opencode/oh-my-opencode-mal.json to override models, adjust reasoning effort, or disable agents entirely. See Configuration for details.

Alternative: Ask any coding agent

Paste this into Claude Code, AmpCode, Cursor, or any coding agent:

Install and configure by following the instructions here:
https://raw.githubusercontent.com/insanemal/oh-my-opencode-mal/refs/heads/master/README.md

For LLM Agents

If you're an LLM Agent helping set up oh-my-opencode-mal, follow these steps.

Step 1: Check OpenCode Installation

opencode --version

If not installed, direct the user to https://opencode.ai/docs first.

Step 2: Ask About Provider Access

Ask these questions one at a time, waiting for responses:

1. "Do you have an Antigravity subscription (via cliproxy)?" (Provides Claude + Gemini via cliproxy/ prefix)
2. "Do you have access to OpenAI API?" (Enables openai/ models)

Help the user understand the tradeoffs:

• Antigravity via cliproxy provides Claude + Gemini routing.
• OpenAI is optional; it enables openai/ models.
• If the user has no providers, the plugin still works using OpenCode Zen free models (opencode/big-pickle). They can switch to paid providers later by editing ~/.config/opencode/oh-my-opencode-mal.json.

Step 3: Run the Installer

Based on answers, run:

bunx oh-my-opencode-mal@latest install --no-tui --antigravity=<yes|no> --openai=<yes|no>

Examples:

# Antigravity + OpenAI
bunx oh-my-opencode-mal@latest install --no-tui --antigravity=yes --openai=yes --tmux=no

# OpenAI only
bunx oh-my-opencode-mal@latest install --no-tui --antigravity=no --openai=yes --tmux=no

# No providers (Zen free models only)
bunx oh-my-opencode-mal@latest install --no-tui --antigravity=no --openai=no --tmux=no

The installer automatically:

• Adds the plugin to ~/.config/opencode/opencode.json
• Configures cliproxy provider for Antigravity models
• Generates agent model mappings in ~/.config/opencode/oh-my-opencode-mal.json

Crucial Advice for the User:

• They can easily assign different models to different agents by editing ~/.config/opencode/oh-my-opencode-mal.json.
• If they add a new provider later, they just need to update this file.
• Read generated ~/.config/opencode/oh-my-opencode-mal.json file and report the model configuration.

Step 4: Install and Configure Cliproxy (if using Antigravity)

If the user selected Antigravity, guide them to install cliproxy:

macOS:

brew install cliproxyapi
brew services start cliproxyapi

Linux:

curl -fsSL https://raw.githubusercontent.com/brokechubb/cliproxyapi-installer/refs/heads/master/cliproxyapi-installer | bash

Authenticate with Antigravity:

./cli-proxy-api --antigravity-login

For OpenAI (if enabled): Ask user to run the following command. Don't run it yourself, it requires user interaction.

opencode auth login
# Select your provider and complete OAuth flow

Troubleshooting

If the installer fails, check the expected config format:

bunx oh-my-opencode-mal@latest install --help

Then manually create the config files at:

• ~/.config/opencode/oh-my-opencode-mal.json

🏛️ Meet the Pantheon

01. Orchestrator: The Embodiment Of Order

02. Explorer: The Eternal Wanderer

03. Oracle: The Guardian of Paths

04. Librarian: The Weaver of Knowledge

05. Designer: The Guardian of Aesthetics

06. Fixer: The Last Builder

🎚️ Presets

Presets are pre-configured agent model mappings for different provider combinations. The installer generates these automatically based on your available providers, and you can switch between them instantly.

Switching Presets

Method 1: Edit Config File

Edit ~/.config/opencode/oh-my-opencode-mal.json and change the preset field:

{
  "preset": "openai"
}

Method 2: Environment Variable

Set the environment variable before running OpenCode:

export OH_MY_OPENCODE_SLIM_PRESET=openai
opencode

The environment variable takes precedence over the config file.

OpenAI Preset

Uses OpenAI models exclusively:

{
  "preset": "openai",
  "presets": {
    "openai": {
      "orchestrator": { "model": "openai/gpt-5.2-codex", "skills": ["*"], "mcps": ["websearch"] },
      "oracle": { "model": "openai/gpt-5.2-codex", "variant": "high", "skills": [], "mcps": [] },
      "librarian": { "model": "openai/gpt-5.1-codex-mini", "variant": "low", "skills": [], "mcps": ["websearch", "context7", "grep_app"] },
      "explorer": { "model": "openai/gpt-5.1-codex-mini", "variant": "low", "skills": [], "mcps": [] },
      "designer": { "model": "openai/gpt-5.1-codex-mini", "variant": "medium", "skills": ["agent-browser"], "mcps": [] },
      "fixer": { "model": "openai/gpt-5.1-codex-mini", "variant": "low", "skills": [], "mcps": [] }
    }
  }
}

Antigravity via CLIProxy Preset

Routes through Antigravity's CLIProxy for Claude + Gemini models:

{
  "preset": "cliproxy",
  "presets": {
    "cliproxy": {
      "orchestrator": { "model": "cliproxy/gemini-claude-opus-4-5-thinking", "skills": ["*"], "mcps": ["websearch"] },
      "oracle": { "model": "cliproxy/gemini-3-pro-preview", "variant": "high", "skills": [], "mcps": [] },
      "librarian": { "model": "cliproxy/gemini-3-flash-preview", "variant": "low", "skills": [], "mcps": ["websearch", "context7", "grep_app"] },
      "explorer": { "model": "cliproxy/gemini-3-flash-preview", "variant": "low", "skills": [], "mcps": [] },
      "designer": { "model": "cliproxy/gemini-3-flash-preview", "variant": "medium", "skills": ["agent-browser"], "mcps": [] },
      "fixer": { "model": "cliproxy/gemini-3-flash-preview", "variant": "low", "skills": [], "mcps": [] }
    }
  }
}

{
  "provider": {
    "cliproxy": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "CliProxy",
      "options": {
        "baseURL": "http://127.0.0.1:8317/v1",
        "apiKey": "your-api-key-1"
      },
      "models": {
        "gemini-3-pro-high": {
          "name": "Gemini 3 Pro High",
          "thinking": true,
          "attachment": true,
          "limit": { "context": 1048576, "output": 65535 },
          "modalities": { "input": [ "text", "image", "pdf" ], "output": [ "text" ] }
        },
        "gemini-3-flash-preview": {
          "name": "Gemini 3 Flash",
          "attachment": true,
          "limit": { "context": 1048576, "output": 65536 },
          "modalities": { "input": [ "text", "image", "pdf" ], "output": [ "text" ] }
        },
        "gemini-claude-opus-4-5-thinking": {
          "name": "Claude Opus 4.5 Thinking",
          "attachment": true,
          "limit": { "context": 200000, "output": 32000 },
          "modalities": { "input": [ "text", "image", "pdf" ], "output": [ "text" ] }
        },
        "gemini-claude-sonnet-4-5-thinking": {
          "name": "Claude Sonnet 4.5 Thinking",
          "attachment": true,
          "limit": { "context": 200000, "output": 32000 },
          "modalities": { "input": [ "text", "image", "pdf" ], "output": [ "text" ] }
        }
      }
    }
  }
}

Author's Preset

Mixed setup combining multiple providers:

{
  "preset": "alvin",
  "presets": {
    "alvin": {
      "orchestrator": { "model": "cliproxy/gemini-claude-opus-4-5-thinking", "skills": ["*"], "mcps": ["*"] },
      "oracle": { "model": "openai/gpt-5.2-codex", "variant": "high", "skills": [], "mcps": [] },
      "librarian": { "model": "cliproxy/gemini-3-flash-preview", "variant": "low", "skills": [], "mcps": ["websearch", "context7", "grep_app"] },
      "explorer": { "model": "cerebras/zai-glm-4.7", "variant": "low", "skills": [], "mcps": [] },
      "designer": { "model": "cliproxy/gemini-3-flash-preview", "variant": "medium", "skills": ["agent-browser"], "mcps": [] },
      "fixer": { "model": "cerebras/zai-glm-4.7", "variant": "low", "skills": [], "mcps": [] }
    }
  }
}

🧩 Skills

Skills are specialized capabilities provided by external agents and tools. Unlike MCPs which are servers, skills are prompt-based tool configurations installed via npx skills add during installation.

Recommended Skills (via npx)

| Skill | Description | Assigned To | |-------|-------------|-------------| | simplify | YAGNI code simplification expert | orchestrator | | agent-browser | High-performance browser automation | designer |

Custom Skills (bundled in repo)

| Skill | Description | Assigned To | |-------|-------------|-------------| | cartography | Repository understanding and hierarchical codemap generation | orchestrator |

Simplify

The Minimalist's sacred truth: every line of code is a liability.

simplify is a specialized skill for complexity analysis and YAGNI enforcement. It identifies unnecessary abstractions and suggests minimal implementations.

Agent Browser

External browser automation for visual verification and testing.

agent-browser provides full high-performance browser automation capabilities. It allows agents to browse the web, interact with elements, and capture screenshots for visual state verification.

Cartography

Automated repository mapping through hierarchical codemaps.

cartography empowers the Orchestrator to build and maintain a deep architectural understanding of any codebase. Instead of reading thousands of lines of code every time, agents refer to hierarchical codemap.md files that describe the why and how of each directory.

How to use:

Just ask the Orchestrator to run cartography. It will automatically detect if it needs to initialize a new map or update an existing one.

Why it's useful:

• Instant Onboarding: Help agents (and humans) understand unfamiliar codebases in seconds.
• Efficient Context: Agents only read architectural summaries, saving tokens and improving accuracy.
• Change Detection: Only modified folders are re-analyzed, making updates fast and efficient.
• Timeless Documentation: Focuses on high-level design patterns that don't get stale.

The skill uses a background Python engine (cartographer.py) to manage state and detect changes.

How it works under the hood:

1. Initialize - Orchestrator analyzes repo structure and runs init to create .slim/cartography.json (hashes) and empty templates.
2. Map - Orchestrator spawns specialized Explorer sub-agents to fill codemaps with timeless architectural details (Responsibility, Design, Flow, Integration).
3. Update - On subsequent runs, the engine detects changed files and only refreshes codemaps for affected folders.

Manual Commands:

# Initialize mapping manually
python3 ~/.config/opencode/skills/cartography/scripts/cartographer.py init \
  --root . \
  --include "src/**/*.ts" \
  --exclude "**/*.test.ts"

# Check for changes since last map
python3 ~/.config/opencode/skills/cartography/scripts/cartographer.py changes --root .

# Sync hashes after manual map updates
python3 ~/.config/opencode/skills/cartography/scripts/cartographer.py update --root .

Skills Assignment

You can customize which skills each agent is allowed to use in ~/.config/opencode/oh-my-opencode-mal.json.

Syntax:

| Syntax | Description | Example | |--------|-------------|---------| | "*" | All installed skills | ["*"] | | "!item" | Exclude specific skill | ["*", "!agent-browser"] | | Explicit list | Only listed skills | ["simplify"] | | "!*" | Deny all skills | ["!*"] |

Rules:

• * expands to all available skills
• !item excludes specific skills
• Conflicts (e.g., ["a", "!a"]) → deny wins (principle of least privilege)
• Empty list [] → no skills allowed

Example Configuration:

{
  "presets": {
    "my-preset": {
      "orchestrator": {
        "skills": ["*", "!agent-browser"]
      },
      "designer": {
        "skills": ["agent-browser", "simplify"]
      }
    }
  }
}

🔌 MCP Servers

Built-in Model Context Protocol servers (enabled by default):

| MCP | Purpose | URL | |-----|---------|-----| | websearch | Real-time web search via Exa AI | https://mcp.exa.ai/mcp | | context7 | Official library documentation | https://mcp.context7.com/mcp | | grep_app | GitHub code search via grep.app | https://mcp.grep.app |

MCP Permissions

Control which agents can access which MCP servers using per-agent allowlists:

| Agent | Default MCPs | |-------|--------------| | orchestrator | websearch | | designer | none | | oracle | none | | librarian | websearch, context7, grep_app | | explorer | none | | fixer | none |

Configuration & Syntax

You can configure MCP access in your plugin configuration file: ~/.config/opencode/oh-my-opencode-mal.json.

Per-Agent Permissions

Control which agents can access which MCP servers using the mcps array in your preset. The syntax is the same as for skills:

| Syntax | Description | Example | |--------|-------------|---------| | "*" | All MCPs | ["*"] | | "!item" | Exclude specific MCP | ["*", "!context7"] | | Explicit list | Only listed MCPs | ["websearch", "context7"] | | "!*" | Deny all MCPs | ["!*"] |

Rules:

• * expands to all available MCPs
• !item excludes specific MCPs
• Conflicts (e.g., ["a", "!a"]) → deny wins
• Empty list [] → no MCPs allowed

Example Configuration:

{
  "presets": {
    "my-preset": {
      "orchestrator": {
        "mcps": ["websearch"]
      },
      "librarian": {
        "mcps": ["websearch", "context7", "grep_app"]
      },
      "oracle": {
        "mcps": ["*", "!websearch"]
      }
    }
  }
}

Global Disabling

You can disable specific MCP servers globally by adding them to the disabled_mcps array at the root of your config object.

🛠️ Tools & Capabilities

Tmux Integration

⚠️ Temporary workaround: Start OpenCode with --port to enable tmux integration. The port must match the OPENCODE_PORT environment variable (default: 4096). This is required until the upstream issue is resolved. opencode#9099.

Watch your agents work in real-time. When the Orchestrator launches sub-agents or initiates background tasks, new tmux panes automatically spawn showing each agent's live progress. No more waiting in the dark.

Quick Setup

1. Enable tmux integration in oh-my-opencode-mal.json (see Plugin Config).

{
  "tmux": {
    "enabled": true,
    "layout": "main-vertical",
    "main_pane_size": 60
  }
}

2. Run OpenCode inside tmux:

   tmux
   opencode --port 4096

   Or use a custom port (must match OPENCODE_PORT env var):

   tmux
   export OPENCODE_PORT=5000
   opencode --port 5000

   This allows multiple OpenCode instances on different ports.

Layout Options

| Layout | Description | |--------|-------------| | main-vertical | Your session on the left (60%), agents stacked on the right | | main-horizontal | Your session on top (60%), agents stacked below | | tiled | All panes in equal-sized grid | | even-horizontal | All panes side by side | | even-vertical | All panes stacked vertically |

Background Tasks

The plugin provides tools to manage asynchronous work:

| Tool | Description | |------|-------------| | background_task | Launch an agent in a new session (sync=true blocks, sync=false runs in background) | | background_output | Fetch the result of a background task by ID | | background_cancel | Abort running tasks |

LSP Tools

Language Server Protocol integration for code intelligence:

| Tool | Description | |------|-------------| | lsp_goto_definition | Jump to symbol definition | | lsp_find_references | Find all usages of a symbol across the workspace | | lsp_diagnostics | Get errors/warnings from the language server | | lsp_rename | Rename a symbol across all files |

Built-in LSP Servers: OpenCode includes pre-configured LSP servers for 30+ languages (TypeScript, Python, Rust, Go, etc.). See the official documentation for the full list and requirements.

Code Search Tools

Fast code search and refactoring:

| Tool | Description | |------|-------------| | grep | Fast content search using ripgrep | | ast_grep_search | AST-aware code pattern matching (25 languages) | | ast_grep_replace | AST-aware code refactoring with dry-run support |

Formatters

OpenCode automatically formats files after they're written or edited using language-specific formatters.

Built-in Formatters: Includes support for Prettier, Biome, gofmt, rustfmt, ruff, and 20+ others. See the official documentation for the complete list.

⚙️ Configuration

Files You Edit

| File | Purpose | |------|---------| | ~/.config/opencode/opencode.json | OpenCode core settings | | ~/.config/opencode/oh-my-opencode-mal.json | Plugin settings (agents, tmux, MCPs) | | .opencode/oh-my-opencode-mal.json | Project-local plugin overrides (optional) |

Prompt Overriding

You can customize agent prompts by creating markdown files in ~/.config/opencode/oh-my-opencode-mal/:

| File | Purpose | |------|---------| | {agent}.md | Replaces the default prompt entirely | | {agent}_append.md | Appends to the default prompt |

Example:

~/.config/opencode/oh-my-opencode-mal/
  ├── orchestrator.md          # Custom orchestrator prompt
  ├── orchestrator_append.md   # Append to default orchestrator prompt
  ├── explorer.md
  ├── explorer_append.md
  └── ...

Usage:

• Create {agent}.md to completely replace an agent's default prompt
• Create {agent}_append.md to add custom instructions to the default prompt
• Both files can exist simultaneously - the replacement takes precedence
• If neither file exists, the default prompt is used

This allows you to fine-tune agent behavior without modifying the source code.

Plugin Config (oh-my-opencode-mal.json)

The installer generates this file based on your providers. You can manually customize it to mix and match models. See the Presets section for detailed configuration options.

Option Reference

| Option | Type | Default | Description | |--------|------|---------|-------------| | preset | string | - | Name of the preset to use (e.g., "openai", "cliproxy") | | presets | object | - | Named preset configurations containing agent mappings | | presets.<name>.<agent>.model | string | - | Model ID for the agent (e.g., "google/claude-opus-4-5-thinking") | | presets.<name>.<agent>.temperature | number | - | Temperature setting (0-2) for the agent | | presets.<name>.<agent>.variant | string | - | Agent variant for reasoning effort (e.g., "low", "medium", "high") | | presets.<name>.<agent>.skills | string[] | - | Array of skill names the agent can use ("*" for all, "!item" to exclude) | | presets.<name>.<agent>.mcps | string[] | - | Array of MCP names the agent can use ("*" for all, "!item" to exclude) | | tmux.enabled | boolean | false | Enable tmux pane spawning for sub-agents | | tmux.layout | string | "main-vertical" | Layout preset: main-vertical, main-horizontal, tiled, even-horizontal, even-vertical | | tmux.main_pane_size | number | 60 | Main pane size as percentage (20-80) | | disabled_mcps | string[] | [] | MCP server IDs to disable globally (e.g., "websearch") |

Note: Agent configuration should be defined within presets. The root-level agents field is deprecated.

🗑️ Uninstallation

1. Remove the plugin from your OpenCode config:

   Edit ~/.config/opencode/opencode.json and remove "oh-my-opencode-mal" from the plugin array.

2. Remove configuration files (optional):

   rm -f ~/.config/opencode/oh-my-opencode-mal.json
   rm -f .opencode/oh-my-opencode-mal.json

🙏 Credits

This is a slimmed-down fork of oh-my-opencode by @code-yeongyu.

📄 License

MIT