Codex Orchestrator Pattern: Astra/Sol Orchestrator with Luna Subagents

Melvin Vivas · X post · 2026-10-02 · Open on X

Topics: AI Agents, Tool Use & MCP, AI Dev Tools & Productivity · Level: intermediate

Summary

The creator updated his open-source Codex setup so that GPT-6.1 Sol (or Astra) acts as the orchestrator and hands work to cheaper Luna subagents. The repo shows a multi-agent pattern for coding agents: a strong model plans and coordinates, and lighter models do the subtasks.

Key points

• Orchestrator/subagent pattern: a strong model (Astra or Sol) coordinates and Luna models run as subagents in Codex.
• The repo has been updated to use GPT-6.1 Sol as the orchestrator model.
• Using cheaper or faster models for subagents can cut cost and latency while the strong model handles planning.
• The setup lives in the GitHub repo donvito/codex-astra-luna-orchestrator.

Resources mentioned

• donvito/codex-astra-luna-orchestrator · repo · github.com · free
  The creator's Codex skill for an orchestrator-plus-subagents setup (Astra orchestrator, Luna subagents), configured through config.toml.
  Also in: Open-source Codex skill: Astra/Sol orchestrator with Luna subagents (Melvin Vivas on X · notes), Cost-Efficient Codex Subagents: Astra/Sol Orchestrator + Luna Workers (Melvin Vivas on X · notes), Codex Orchestrator v0.2.1: GPT-6 Sol orchestrator with Luna subagents (Melvin Vivas on X · notes), Orchestrator/Subagent Patterns: Astra-Luna Skill vs Fusion and Advisor (Melvin Vivas on X · notes) and 27 more
• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more

Try this

• Clone the codex-astra-luna-orchestrator repo and try the orchestrator/subagent setup in Codex.
• Build a Codex workflow where a strong model plans and hands subtasks to cheaper subagent models.