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* fix(combo): keep queue/network timeouts out of the provider breaker A single-model network error (ECONNREFUSED / proxy_unreachable) means we never reached the provider — the provider may be healthy while only the network path is broken. OmniRoute's own rate-limit queue timeouts are backpressure we applied, not an upstream failure. Neither should trip the whole-provider breaker. - chatPredicates: the single-model path excludes proxy_unreachable and RATE_LIMIT_QUEUE_* from the provider-breaker trip. - accountFallback.recordProviderFailure: isQueueTimeout short-circuits before the breaker ever counts (combo.ts already flags it from errorText). - chat.ts: the queue/network guard on the allRateLimited _onFailure trip. Deliberately leaves the combo same-provider dead-proxy leg (#8376) intact: there a proxy_unreachable on the next same-provider target must still be able to open the breaker, or a dead proxy burns every attempt until the 503 max-retry limit. Signed-off-by: Minxi Hou <houminxi@gmail.com> * fix(resilience): dedup same-provider network errors per event Same-provider combo targets can all fail the same single network event (a VPN blip) within one request. Without a dedup each target counts once toward the provider breaker, so one transient blip opens the whole-provider breaker while the provider is healthy — the antigravity outage this branch originally chased. recordProviderFailure now keeps a short per-provider window (10s) for proxy_unreachable failures: the first network error in a window counts, the rest of that window are the same event and return. A genuinely dead proxy keeps failing across requests (past the window) and still accumulates to its threshold, so the #8376 dead-proxy protection is not weakened. Covered by tests/unit/breaker-network-error-guard.test.ts: same-window errors dedup to one, cross-window errors still open the breaker. Signed-off-by: Minxi Hou <houminxi@gmail.com> --------- Signed-off-by: Minxi Hou <houminxi@gmail.com>