oh-my-opencode-slim

A lightweight, powerful agent orchestration plugin for OpenCode

Six divine beings forged from necessity, 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.

Antigravity subscription recommended. The pantheon is tuned for Antigravity's model routing. Other providers work, but you'll get the best experience with Antigravity.

⚡ Quick Navigation

• 🚀 Installation
  • For Humans
  • For LLM Agents
• 🏛️ Meet the Pantheon
  • Orchestrator
  • Explorer
  • Oracle
  • Librarian
  • Designer
  • Fixer
• 🧩 Skills
  • Available Skills
  • Default Skill Assignments
  • YAGNI Enforcement
  • Playwright Integration
  • Customizing Agent Skills
• 🛠️ Tools & Capabilities
  • Tmux Integration
  • Quota Tool
  • Background Tasks
  • LSP Tools
  • Code Search Tools
• 🔌 MCP Servers
• ⚙️ Configuration
  • Files You Edit
  • OpenCode Config
  • Plugin Config
• 🗑️ Uninstallation

Installation

For Humans

Run the interactive installer:

bunx oh-my-opencode-slim install

Or use non-interactive mode:

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

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

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

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

opencode auth login
# Select: Google → OAuth with Google (Antigravity)
# Repeat for all other providers

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

Meet the Pantheon

Orchestrator: The Embodiment Of Order

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. They don't merely command armies; they fight alongside them. Every line of code passes through their hands before they decide which lesser deity deserves a piece of the puzzle.

Role: Supreme executor, delegator, and overseer
Model: google/claude-opus-4-5-thinking
Prompt: src/agents/orchestrator.ts

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.

Explorer: The Eternal Wanderer

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
Model: google/gemini-3-flash
Prompt: src/agents/explorer.ts

Regex search, AST pattern matching, file discovery, parallel exploration. Read-only: they chart the territory; others conquer it.

Oracle: The Guardian of Paths

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
Model: openai/gpt-5.2-codex
Prompt: src/agents/oracle.ts

Root cause analysis, architecture review, debugging guidance, tradeoff analysis. Read-only: Oracles advise; they don't intervene.

Librarian: The Weaver of Knowledge

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
Model: google/gemini-3-flash
Prompt: src/agents/librarian.ts

Documentation lookup, GitHub code search, library research, best practice retrieval. Read-only: they fetch wisdom; implementation is for others.

Designer: The Guardian of Aesthetics

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
Model: google/gemini-3-flash
Prompt: src/agents/designer.ts

Modern responsive design, CSS/Tailwind mastery, micro-animations, component architecture. Visual excellence over code perfection - beauty is the priority.

Fixer: The Last Builder

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
Model: google/gemini-3-flash
Prompt: src/agents/fixer.ts

Code implementation, refactoring, testing, verification. Execute the plan - no research, no delegation, no planning.

Tools & Capabilities

Tmux Integration

⚠️ Known Issue: When the server port is enabled, only one OpenCode instance can be opened at a time. We're tracking this in issue #15, and there's an upstream PR to OpenCode: 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.

Why This Matters

What You Get

• Live Visibility: Each sub-agent gets its own pane showing real-time output
• Auto-Layout: Tmux automatically arranges panes using your preferred layout
• Auto-Cleanup: Panes close when agents finish, layout rebalances
• Zero Overhead: Works with OpenCode's built-in task tool AND our background_task tool

Quick Setup

⚠️ Temporary workaround: Start OpenCode with --port 4096 to enable tmux integration. This is required until the upstream issue is resolved.

1. Enable tmux integration in oh-my-opencode-slim.json (see Plugin Config).
2. Run OpenCode inside tmux with port 4096:

   tmux
   opencode --port 4096

Layout Options

See the Option Reference for detailed configuration.

Quota Tool

For Antigravity users. You can trigger this at any time by asking the agent to "check my quota" or "show status."

Background Tasks

The plugin provides tools to manage asynchronous work:

LSP Tools

Language Server Protocol integration for code intelligence:

Code Search Tools

Fast code search and refactoring:

🧩 Skills

Skills are specialized capabilities that agents can use. Each agent has a default set of skills, which you can override in the agent config.

Available Skills

Default Skill Assignments

YAGNI Enforcement

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

Use after major refactors or before finalizing PRs. Identifies unnecessary complexity, challenges premature abstractions, estimates LOC reduction, and enforces minimalism.

Playwright Integration

Browser automation for visual verification and testing.

• Browser Automation: Full Playwright capabilities (browsing, clicking, typing, scraping).
• Screenshots: Capture visual state of any web page.
• Sandboxed Output: Screenshots saved to session subdirectory (check tool output for path).

Customizing Agent Skills

Override skills per-agent in your Plugin Config:

{
  "agents": {
    "orchestrator": {
      "skills": ["*"]
    },
    "designer": {
      "skills": ["playwright"]
    }
  }
}

MCP Servers

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

Disabling MCPs

You can disable specific MCP servers by adding them to the disabled_mcps array in your Plugin Config.

Configuration

Files You Edit

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.

{
  "agents": {
    "orchestrator": { "model": "google/claude-opus-4-5-thinking", "skills": ["*"] },
    "oracle": { "model": "openai/gpt-5.2-codex", "skills": [] },
    "librarian": { "model": "google/gemini-3-flash", "skills": [] },
    "explorer": { "model": "google/gemini-3-flash", "skills": [] },
    "designer": { "model": "google/gemini-3-flash", "skills": ["playwright"] },
    "fixer": { "model": "google/gemini-3-flash", "skills": [] }
  },
  "tmux": {
    "enabled": true,
    "layout": "main-vertical",
    "main_pane_size": 60
  }
}

{
  "agents": {
    "orchestrator": { "model": "google/claude-opus-4-5-thinking", "skills": ["*"] },
    "oracle": { "model": "google/claude-opus-4-5-thinking", "skills": [] },
    "librarian": { "model": "google/gemini-3-flash", "skills": [] },
    "explorer": { "model": "google/gemini-3-flash", "skills": [] },
    "designer": { "model": "google/gemini-3-flash", "skills": ["playwright"] },
    "fixer": { "model": "google/gemini-3-flash", "skills": [] }
  }
}

{
  "agents": {
    "orchestrator": { "model": "openai/gpt-5.2-codex", "skills": ["*"] },
    "oracle": { "model": "openai/gpt-5.2-codex", "skills": [] },
    "librarian": { "model": "openai/gpt-5.1-codex-mini", "skills": [] },
    "explorer": { "model": "openai/gpt-5.1-codex-mini", "skills": [] },
    "designer": { "model": "openai/gpt-5.1-codex-mini", "skills": ["playwright"] },
    "fixer": { "model": "openai/gpt-5.1-codex-mini", "skills": [] }
  }
}

Option Reference

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