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* fix(agents): keep queued guard warnings when a model call is retried LoopDetectionMiddleware, TokenBudgetMiddleware and ToolProgressMiddleware pop their queued warning/hint before calling the model. When the call raises, LLMErrorHandlingMiddleware (outside them) retries by running their wrap_model_call again, and by then the queue is empty, so the retried request goes out without the warning. Loop detection and the token budget have already marked it as sent, so it is never queued again, and a loop runs on to the hard stop unwarned. Put the drained items back in front of the queue when the handler raises, then re-raise. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(agents): trim restored loop warnings from the tail and drop a dead helper _restore_pending_warnings put the restored warnings at the front and then trimmed the front, so if the cap ever fired it would drop exactly what it restored. Trim the tail, as tool progress does. _augment_request had no callers after the wrap_model_call change. Add the sync twin of the tool progress retry test. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * refactor(agents): drop tool progress's unused _augment_request Its only remaining reference was a test name; the dedup that test checks lives in _inject_hints. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>