isRetryableModelError() now checks the HTTP status code (429/503/529)
in addition to existing message pattern matching. This ensures rate
limit errors trigger model fallback regardless of error message format
or language (e.g., Chinese GLM errors).
Changes:
- ErrorInfo interface extended with statusCode?: number
- isRetryableModelError() checks statusCode after STOP patterns, before
message pattern fallback
- extractErrorStatusCode() added to error-classifier.ts (supports
statusCode, status, code, response.status fields)
- GLM-specific STOP patterns added: daily call limit, in arrears,
fair use policy, recharge and try — these prevent quota/billing 429s
from being treated as transient rate limits
- statusCode propagated through tryFallbackRetry and manager.ts
400 intentionally excluded from statusCode check (permanent client error).
cailgarrisk-collab