Repro

Use a Pi-backed workflow/model config:

provider: pi
model: openai-codex/gpt-5.5

Error

Pi model not found: provider='openai-codex' model='gpt-5.5'

Root cause

Archon v0.3.12 binary includes a stale embedded Pi dependency/catalog that only includes OpenAI Codex models up to openai-codex/gpt-5.4-mini, while upstream pi-mono @earendil-works/pi-ai@0.75.3 includes openai-codex/gpt-5.5.

Expected

Archon's Pi provider should bundle the current @earendil-works/pi-ai / @earendil-works/pi-coding-agent packages so openai-codex/gpt-5.5 resolves through Pi's ModelRegistry.