v0.1.7 — model-unavailable failure type
Reported from real use: specifying gpt-5.2-codex was rejected by the Codex account; re-running with the default model succeeded.
- Add
model-unavailableto the failure taxonomy (Preflight runbook + Arena Limitations template). It is distinct fromauth(authentication is fine) andrefusal(the model declined to answer). - Guidance: don't pin a specific model version unless the account is confirmed to support it; prefer the default model. The standard retry for
model-unavailableis to drop the override and re-run with the default model.
This is exactly the v0.1.5 Failure-type / Retry-recommendation mechanism working in the field — the report used that format and the one-variable-change retry succeeded; v0.1.7 just fills the taxonomy gap.