Query external LLMs like OpenAI Codex and Google Gemini via CLI for second opinions on architecture, design decisions, feature planning, and code reviews of git diffs or changes. Run single or parallel multi-LLM consultations, with synthesized responses highlighting consensus, divergences, and unique insights from project context.
npx claudepluginhub majesticlabs-dev/majestic-marketplace --plugin majestic-llmGet architecture and design second opinions from external LLMs (OpenAI Codex, Google Gemini) via their CLIs. Use when you need alternative perspectives on design decisions, model selection, or structured comparison of approaches.
Get code review feedback from external LLMs (OpenAI Codex, Google Gemini) with full project context. Use when you want a second opinion on code changes, with explicit control over review focus and project-aware prompts.
Multi-LLM integration for second opinions and task delegation
Consult external AIs (Gemini 2.5 Pro, OpenAI Codex, Claude) for second opinions. Use for debugging failures, architectural decisions, security validation, or need fresh perspective with synthesis.
Delegate tasks to Codex, Gemini, and OpenCode AI agents via Owlex MCP
v9.36.1 — Codex-compatible portable skills with Claude-safe provider routing and session ID support. Run /octo:setup.
Intelligent delegation framework for routing tasks to external LLM services while retaining strategic oversight
Consult multiple AI coding agents (Gemini, OpenAI, Grok, Perplexity, plus codex and gemini CLIs when installed) to get diverse perspectives on coding problems
Uses power tools
Uses Bash, Write, or Edit tools
Share bugs, ideas, or general feedback.
The Majestic marketplace where we share our workflows.
New here? Check out the Marketplace Tutorial for an interactive walkthrough.
Coding is no longer the bottleneck. Planning, review, and learning loops matter more than syntax. Each feature makes the next one easier to build.
| Step | What Happens | Key Tools |
|---|---|---|
| Plan | Agents research codebase + best practices, produce detailed implementation plans | /majestic:plan, architect agent |
| Work | Agents write code, tests, and iterate using real app feedback | /majestic:build-task, coder skills |
| Assess | Multi-angle review: security, performance, simplicity, conventions | /majestic:code-review, quality-gate |
| Reflect | Analyze session patterns, capture lessons so future agents improve | /majestic-tools:insight:reflect, /majestic:add-lesson |
See the Workflow Guide for detailed documentation.
Run the installer:
curl -fsSL https://raw.githubusercontent.com/majesticlabs-dev/majestic-marketplace/master/install.sh | bash
This gives you options to:
Run claude and add the marketplace:
/plugin marketplace add https://github.com/majesticlabs-dev/majestic-marketplace.git
Then install a plugin:
/plugin install {plugin-name}
Export Majestic plugins to OpenCode or Codex with schema-aware conversion:
./scripts/install-codex.sh
# Install all plugins
./scripts/install-codex.sh --all
# Install all plugins to OpenCode
./scripts/install-opencode.sh --all
# Install specific plugins
./scripts/install-codex.sh engineer rails tools
# Example (explicit): convert engineer, rails, and tools to OpenCode
# Output target: ~/.config/opencode
./scripts/install-opencode.sh engineer rails tools
# Install one plugin (short or prefixed)
./scripts/install-codex.sh engineer
./scripts/install-codex.sh majestic-tools
Both commands are now local to this repository and only require Ruby (scripts/convert-plugin.rb).
This runs a converter pipeline (not a plain file copy), so incompatible Claude metadata is translated for target formats.
disable-model-invocation frontmatter is preserved as part of source metadata parsing, but it does not exclude a command from conversion for OpenCode/Codex output.
Output locations:
~/.codex/skills/ and ~/.codex/prompts/~/.config/opencode (opencode.json, agents/, skills/, plugins/)Limitations: Codex still does not support some Claude Code features (Task, hooks, some MCP integrations), so behavior is reduced there.
| Plugin | Description |
|---|---|
| majestic-engineer | Language-agnostic engineering workflows (17 agents, 8 commands, 12 skills) |
| majestic-rails | Ruby on Rails development tools (23 agents, 5 commands, 9 skills) |
| majestic-react | Modern React development with TypeScript (3 agents, 1 command, 4 skills) |
| majestic-python | Python development tools (2 agents) |
| majestic-devops | Infrastructure-as-Code and DevOps workflows (1 agent, 8 skills) |
| majestic-llm | External LLM integration - Codex, Gemini (5 agents, 1 command) |
| majestic-marketing | Marketing and SEO tools (14 agents, 2 commands, 24 skills) |
| majestic-sales | Sales acceleration tools (1 command, 6 skills) |
| majestic-company | Business operations and CEO tools (2 agents, 21 skills) |
| majestic-experts | Expert panel discussion system (2 agents, 1 command) |
| majestic-tools | Claude Code customization tools (10 commands, 3 skills) |
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