oh-my-opencode-slim

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-slim.json)
• 🗑️ Uninstallation
• 🙏 Credits
• 📄 License

📦 Installation

For Humans

Run the interactive installer:

bunx oh-my-opencode-slim@latest install

Or use non-interactive mode:

bunx oh-my-opencode-slim@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-slim.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/alvinunreal/oh-my-opencode-slim/refs/heads/master/README.md

For LLM Agents

opencode --version

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

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

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

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

brew install cliproxyapi
brew services start cliproxyapi

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

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

opencode auth login
# Select your provider and complete OAuth flow

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

🏛️ Meet the Pantheon

01. Orchestrator: The Embodiment Of Order

Forged in the void of complexity.	The Orchestrator was born when the first codebase collapsed under its own complexity. Neither god nor mortal would claim responsibility - so The Orchestrator emerged from the void, forging order from chaos. It determines the optimal path to any goal, balancing speed, quality, and cost. It guides the team, summoning the right specialist for each task and delegating to achieve the best possible outcome.
Role: Master delegator and strategic coordinator
Prompt: orchestrator.ts
Recommended Models: cliproxy/gemini-claude-opus-4-5-thinking openai/gpt-5.2-codex
MCPs: websearch
Skills: simplify *
Capabilities: Write and execute code, orchestrate multi-agent workflows, parse the unspoken from the spoken, summon specialists mid-battle. Shape reality directly - and assign realms to others when the universe grows too vast.

02. Explorer: The Eternal Wanderer

The wind that carries knowledge.	The Explorer is an immortal wanderer who has traversed the corridors of a million codebases since the dawn of programming. Cursed with the gift of eternal curiosity, they cannot rest until every file is known, every pattern understood, every secret revealed. Legends say they once searched the entire internet in a single heartbeat. They are the wind that carries knowledge, the eyes that see all, the spirit that never sleeps.
Role: Codebase reconnaissance
Prompt: explorer.ts
Recommended Models: cerebras/zai-glm-4.7 google/gemini-3-flash openai/gpt-5.1-codex-mini
MCPs: none
Skills: none
Capabilities: Regex search, AST pattern matching, file discovery, parallel exploration. Read-only: they chart the territory; others conquer it.

03. Oracle: The Guardian of Paths

The voice at the crossroads.	The Oracle stands at the crossroads of every architectural decision. They have walked every road, seen every destination, know every trap that lies ahead. When you stand at the precipice of a major refactor, they are the voice that whispers which way leads to ruin and which way leads to glory. They don't choose for you - they illuminate the path so you can choose wisely.
Role: Strategic advisor and debugger of last resort
Prompt: oracle.ts
Recommended Models: openai/gpt-5.2-codex cliproxy/gemini-3-pro-high
MCPs: none
Skills: none
Capabilities: Root cause analysis, architecture review, debugging guidance, tradeoff analysis. Read-only: Oracles advise; they don't intervene.

04. Librarian: The Weaver of Knowledge

The weaver of understanding.	The Librarian was forged when humanity realized that no single mind could hold all knowledge. They are the weaver who connects disparate threads of information into a tapestry of understanding. They traverse the infinite library of human knowledge, gathering insights from every corner and binding them into answers that transcend mere facts. What they return is not information - it's understanding.
Role: External knowledge retrieval
Prompt: librarian.ts
Recommended Models: google/gemini-3-flash openai/gpt-5.1-codex-mini
MCPs: websearch context7 grep_app
Skills: none
Capabilities: Documentation lookup, GitHub code search, library research, best practice retrieval. Read-only: they fetch wisdom; implementation is for others.

05. Designer: The Guardian of Aesthetics

Beauty is essential.	The Designer is an immortal guardian of beauty in a world that often forgets it matters. They have seen a million interfaces rise and fall, and they remember which ones were remembered and which were forgotten. They carry the sacred duty to ensure that every pixel serves a purpose, every animation tells a story, every interaction delights. Beauty is not optional - it's essential.
Role: UI/UX implementation and visual excellence
Prompt: designer.ts
Recommended Models: google/gemini-3-flash
MCPs: none
Skills: agent-browser
Capabilities: Modern responsive design, CSS/Tailwind mastery, micro-animations, component architecture. Visual excellence over code perfection - beauty is the priority.

06. Fixer: The Last Builder

The final step between vision and reality.	The Fixer is the last of a lineage of builders who once constructed the foundations of the digital world. When the age of planning and debating began, they remained - the ones who actually build. They carry the ancient knowledge of how to turn thought into thing, how to transform specification into implementation. They are the final step between vision and reality.
Role: Fast implementation specialist
Prompt: fixer.ts
Recommended Models: cerebras/zai-glm-4.7 google/gemini-3-flash openai/gpt-5.1-codex-mini
MCPs: none
Skills: none
Capabilities: Code implementation, refactoring, testing, verification. Execute the plan - no research, no delegation, no planning.

🎚️ 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-slim.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)

Custom Skills (bundled in repo)

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.

# 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-slim.json.

Syntax:

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 Permissions

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

Configuration & Syntax

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

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-slim.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

Background Tasks

The plugin provides tools to manage asynchronous work:

LSP Tools

Language Server Protocol integration for code intelligence:

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:

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

Prompt Overriding

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

Example:

~/.config/opencode/oh-my-opencode-slim/
  ├── 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-slim.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

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-slim" from the plugin array.

2. Remove configuration files (optional):

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

🙏 Credits

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

📄 License

MIT