feat(sse): per-egress pacing + fleet-wide backoff for opencode rotation (opt-in)

changelog.d/fixes/14290-opencode-egress-throttle.md

@@ -0,0 +1 @@
+- **feat(sse):** multi-account rotation now spreads sends per network egress and eases off fleet-wide when throttled, opt-in via `OPENCODE_EGRESS_THROTTLE_ENABLED=1` ([#14290](https://github.com/diegosouzapw/OmniRoute/pull/14290)) — thanks @maxmad64bis

config/quality/file-size-baseline.json

@@ -1,4 +1,5 @@
 {
+  "_rebaseline_2026_09_21_14290_stack_handover_growth": "Stacked on #13924 (rewritten/squash-merged as 893fef9c on release/v3.8.51). PR #14290's own growth on top of that parent: open-sse/executors/opencode.ts 1233->1247 (+14 irreducible seam: settle429Arm park arm forcing burstStreak to threshold + handover comment; park/replay block owned by #13924, throttle leaf opencodeEgressThrottle.ts 543 lines under cap). Covered by tests/unit/opencode-429-park-resume.test.ts handover case (8/8) + tests/unit/opencode-egress-throttle.test.ts (22/22).",
   "_rebaseline_2026_09_18_merge_train_8_frozen_growth": "Owner-approved train rebaseline (2026-09-18, /merge-prs; precedent _rebaseline_2026_07_23_v3849_merge_train_15). Own growth of 32 merge-ready contributor PRs that each add irreducible call-site/plumbing lines to an already-frozen file, measured on the combined merge-train tip 04cf8095 (release tip green before boarding). Per-file (old->new, contributing PRs): src/app/(dashboard)/dashboard/combos/page.tsx 5080->5091 (#13951); src/app/(dashboard)/dashboard/endpoint/EndpointPageClient.tsx 2491->2493 (#13533); src/app/api/v1/models/catalog.ts 2117->2127 (#13994); src/lib/db/apiKeys.ts 1659->1671 (#12952, #13861); src/lib/tokenHealthCheck.ts 1221->1254 (#13444, #13874); src/shared/components/RequestLoggerDetail.tsx 1200->1210 (#13373); src/shared/components/RequestLoggerV2.tsx 1718->1748 (#13373); src/shared/middleware/chatBodyAdmission.ts 1200->1206 (#13823); src/sse/handlers/chat.ts 2541->2547 (combined growth); src/sse/services/auth.ts 3582->3592 (combined growth); open-sse/executors/antigravity.ts 1665->1717 (#13125, #13318, #13659); open-sse/executors/codex.ts 1553->1570 (#13708); open-sse/executors/cursor.ts 1847->1868 (#13125); open-sse/executors/deepseek-web.ts 1200->1224 (#13226); open-sse/executors/default.ts 1200->1205 (#11828); open-sse/handlers/imageGeneration.ts 3304->3334 (#12982); open-sse/services/accountFallback.ts 2507->2515 (#13008); open-sse/services/combo/executeTargetAttempt.ts 1228->1258 (#12235); open-sse/services/combo/roundRobinCombo.ts 1221->1261 (#12235); open-sse/services/rateLimitManager.ts 1200->1329 (#13895); open-sse/translator/response/openai-responses.ts 1466->1518 (#12841, #13956); open-sse/utils/cursorAgentProtobuf.ts 1547->1588 (#13125); open-sse/utils/stream.ts 3140->3239 (#12688, #12855); tests/integration/chat-pipeline.test.ts 1740->1756 (#12966); tests/unit/account-fallback-service.test.ts 2056->2072 (#13040); tests/unit/chatcore-translation-paths.test.ts 3449->3546 (#13856, #13972); tests/unit/token-refresh-service.test.ts 1407->1408 (combined growth); tests/unit/translator-openai-to-gemini.test.ts 1625->1809 (#13318, #13848). Files previously under the 1200 cap that crossed it are frozen at the measured size. Structural shrink of these god-files stays tracked in #3501; the ceilings never move up again outside a documented entry. ADJUST (train 8d re-measure after #13548 ejection and #14101 landing): open-sse/services/accountFallback.ts 2515->2517 (#13008 +22, #13350 +7, #13984 +2, #13040 +2 on a tip at 2499).",
   "_rebaseline_2026_09_18_14065_codex_reasoning_whitelist": "Release-tip drift: open-sse/executors/codex.ts 1552->1553 (+1) from #14065 (fix(codex): whitelist reasoning object keys before the wire, #13643), merged 2026-09-18 without its own rebaseline — the PR->release fast-gates do not run check:file-size, so the tip went red for every train boarding afterwards. Absorbed at the release tip by the /merge-prs captain session (owner-approved train-rebaseline policy, 2026-09-18). Structural shrink tracked in #3501.",
   "_rebaseline_2026_09_18_restore_13643_after_clobber": "Restore of #13643 after e7999c477b clobbered the whitelist at the release tip (see #14062). open-sse/executors/codex.ts 1530->1552 (+22): keep the tip force-rule precedence and restore OpenRouter-style enabled:false plus the reasoning-object key whitelist before the wire. Covered by tests/unit/codex-reasoning-wire-whitelist.test.ts.",
@@ -525,7 +526,7 @@
     "open-sse/executors/deepseek-web.ts": 1224,
     "open-sse/executors/default.ts": 1205,
     "open-sse/services/rateLimitManager.ts": 1329,
-    "open-sse/executors/opencode.ts": 1233
+    "open-sse/executors/opencode.ts": 1247
   },
   "_rebaseline_2026_09_15_roundrobin_dashboard_events": "Fix #13089 (Combo Studio Live dashboard shows an empty backlog for round-robin combos): open-sse/services/combo/roundRobinCombo.ts 1205->1213. Round-robin is the only combo strategy that bypasses handleComboChat/executeTargetAttempt.ts, the path that publishes the combo.target.attempt/succeeded/failed EventBus events the Live dashboard listens for — so round-robin completions never showed up. The new call-site wiring (createRRDashboardEvents(...) instantiated once per target, one-line .attempt()/.succeeded()/.failed() calls at the 6 existing dispatch/outcome points) is the emitter logic actually extracted into a new module, open-sse/services/combo/rrDashboardEvents.ts — this is the minimum irreducible footprint for wiring 6 required call sites into 6 fixed control-flow points of the frozen file. Covered by tests/unit/issue-13089-roundrobin-live-ws-events.test.ts (2 tests: success + failure paths).",
   "_rebaseline_base_2026_08_10_proxyfetch": "Base-red fix (green-prs sweep, issue #9985): open-sse/utils/proxyFetch.ts 1207 > cap 1000 — new proxied-TLS fetch helper introduced by the Fal reference-image work. Owner-authorized quick rebaseline to green; structural slim tracked for v3.9.0.",