Existing read-loop/rejection-loop breakers key on CONSECUTIVE rounds, so a
single interleaved success resets them — the hole that let the 2026-07-16
audition run-3 thrash npm install against a hallucinated package across 57
inferences. Add repeatedToolFailureLoop: cumulative count per normalized
tool-failure signature within a stage; once a signature hits
stageFailureLoopLimit (default 6) the stage fails with STAGE_LOOP_BREAK_GATE
and the step handler routes straight to recovery (never retried in place).
Pure fold over recorded events (replay-safe, invariants #8/#9);
ToolExecutionFailedEvent lacks stageId so failures correlate via
invocationId -> ToolInvocationRequestedEvent.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
kami
59a0ad3c2b