Open-source fable-advisor plugin orchestrates GPT-6 Luna coding with Opus 5.5 review
daniel_mac8 · x · 2026-09-25
Developer DannyMac180 released fable-advisor, an open-source Claude Code plugin (1.1k GitHub stars) implementing an "architect pattern": your session, on whichever model you pick, acts as a full-time architect owning requirements, decomposition, specs and verification, while implementation is routed to different model subagents and reviewed by a clean-context Fable 5.1 before shipping.
Key points:
- Routine lane: GPT-6 Luna (effort max, via Codex CLI) handles fully-specified tasks by default
- High-complexity lane: GPT-6 Sol (effort high) takes one-off tasks requiring judgment
- Author notes Max reasoning for GPT-6 Luna in Codex is off by default and should be enabled; he calls Luna+Max an incredible intelligence-per-dollar setup
- The plugin exploits Claude Code's ability to run each subagent on a different model from the session itself
A directly installable multi-model orchestration workflow showing how to split coding tasks across Opus, GPT and Grok by difficulty.
Related event: Open-Source Plugin fable-advisor Orchestrates Multiple Frontier Models(3 posts)→
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