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  "title": "Circuit breaker: which requests reach the quote API?",
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      "text": "Fictional policy: 3 timeouts in 10s → open for 30s → 1 probe",
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      "text": "3s   new request",
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      "text": "0 API calls",
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      "text": "Close breaker",
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      "text": "A breaker protects a dependency by pausing calls, then testing recovery.",
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      "text": "Retry makes another attempt for one request; the breaker gates later requests.",
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