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fix: prevent 400 format errors from triggering compression loop on Codex Responses API (#6751)

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The error classifier's generic-400 heuristic only extracted err_body_msg from
the nested body structure (body['error']['message']), missing the flat body
format used by OpenAI's Responses API (body['message']). This caused
descriptive 400 errors like 'Invalid input[index].name: string does not match
pattern' to appear generic when the session was large, misclassifying them as
context overflow and triggering an infinite compression loop.

Added flat-body fallback in _classify_400() consistent with the parent
classify_api_error() function's existing handling at line 297-298.
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Teknium 2026-04-09 11:11:34 -07:00 • committed by GitHub
parent 2f0a83dd12
commit 3007174a61
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agent/error_classifier.py
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@ -596,6 +596,9 @@ def _classify_400(
err_obj = body.get("error", {})
if isinstance(err_obj, dict):
err_body_msg = (err_obj.get("message") or "").strip().lower()
# Responses API (and some providers) use flat body: {"message": "..."}
if not err_body_msg:
err_body_msg = (body.get("message") or "").strip().lower()
is_generic = len(err_body_msg) < 30 or err_body_msg in ("error", "")
is_large = approx_tokens > context_length * 0.4 or approx_tokens > 80000 or num_messages > 80