Merge origin/main (63279301bc): reasoning-mandatory 400 recovery folded into turn_recovery/error_classifier/models_reasoning_caps

agent/error_classifier.py

@@ -42,7 +42,10 @@ class FailoverReason(enum.Enum):
     content_policy_blocked = "content_policy_blocked"  # Provider safety filter rejected this prompt — don't retry unchanged
     format_error = "format_error"        # 400 bad request — abort or strip + retry
     invalid_encrypted_content = "invalid_encrypted_content"  # Responses replay blob rejected — strip replay state and retry
-    multimodal_tool_content_unsupported = "multimodal_tool_content_unsupported"  # Provider rejected list content in tool messages — downgrade to text
+    multimodal_tool_content_unsupported = "multimodal_tool_content_unsupported"  # Provider rejected list-type content in tool messages (e.g. Xiaomi MiMo) — downgrade to text and retry
+    reasoning_mandatory = "reasoning_mandatory"  # Route rejects reasoning: {enabled: false} — send the disable no more this session and retry
+
+    # Provider-specific
     thinking_signature = "thinking_signature"  # Anthropic thinking block sig invalid
     long_context_tier = "long_context_tier"    # Anthropic "extra usage" tier gate
     oauth_long_context_beta_forbidden = "oauth_long_context_beta_forbidden"  # Anthropic OAuth rejects 1M beta — disable beta and retry
@@ -340,6 +343,9 @@ _V_PAYLOAD_TOO_LARGE = _v(_R.payload_too_large, should_compress=True)
 _V_OVERLOADED, _V_SERVER_ERROR, _V_TIMEOUT, _V_UNKNOWN = map(_v, (_R.overloaded, _R.server_error, _R.timeout, _R.unknown))
 _V_IMAGE_TOO_LARGE, _V_IMAGE_CORRUPT = _v(_R.image_too_large), _v(_R.image_corrupt)
 _V_MULTIMODAL, _V_INVALID_ENCRYPTED = _v(_R.multimodal_tool_content_unsupported), _v(_R.invalid_encrypted_content)
+_V_REASONING_MANDATORY = _v(_R.reasoning_mandatory, should_compress=False, should_fallback=False)
+# A reasoning-mandatory route answering ``reasoning: {enabled: false}`` (Nous Portal + OpenRouter wording).
+_REASONING_MANDATORY_PATTERN = "reasoning is mandatory"
 
 
 def _billing_hints(error_msg: str) -> Verdict:
@@ -662,6 +668,11 @@ def _classify_400(c: _Ctx) -> Verdict:
         "encrypted content for item" in msg and "could not be verified" in msg
     ) or "could not decrypt the provided encrypted_content" in msg:
         return _V_INVALID_ENCRYPTED
+    # Reasoning-mandatory route rejecting a disable (GLM-5.3 on Nous Portal / OpenRouter). Deterministic
+    # for the request shape, but the only bad field is ``reasoning: {enabled: false}`` — the loop drops
+    # the disable and retries once. Must precede request-validation, which would abort as format_error.
+    if _REASONING_MANDATORY_PATTERN in msg:
+        return _V_REASONING_MANDATORY
     # 400 blaming a field this route never sent (Codex OAuth injects then rejects
     # prompt_cache_retention ~20% of the time): transient, retry identical request.
     if _is_server_injected_param_rejection(msg, c.provider_slug):