diff --git a/config/quality/file-size-baseline.json b/config/quality/file-size-baseline.json
index 3c8b540f9c..d3691e7cde 100644
--- a/config/quality/file-size-baseline.json
+++ b/config/quality/file-size-baseline.json
@@ -1,5 +1,5 @@
 {
-  "_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.",
+  "_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.",
   "_rebaseline_2026_09_03_12648_xkiro_provider": "PR #12648 (feat/provider-xkiro) own growth: src/shared/constants/providers/apikey/gateways.ts +18 lines on top of #12649 (the xkiro APIKEY_PROVIDERS_GATEWAYS catalog entry with hasFree/freeNote/authHint/apiHint documenting the 5M tokens/day free plan, plus the Prettier reflow of two pre-existing >100-col authHint lines (oneminai, freebuff) that lint-staged enforces on any touch of the file; additive data at the existing registry chokepoint, same god-file no-split rationale as prior gateways.ts rebaselines: #11786 seekai, #10987 logfare, #10531 freebuff). Covered by tests/unit/free-provider-xkiro.test.ts (4/4).",
@@ -478,7 +478,7 @@
     "open-sse/handlers/search.ts": 1789,
     "open-sse/mcp-server/schemas/tools.ts": 1621,
     "open-sse/mcp-server/server.ts": 1572,
-    "open-sse/services/accountFallback.ts": 2515,
+    "open-sse/services/accountFallback.ts": 2517,
     "open-sse/services/adobeFireflyBrowserLogin.ts": 1401,
     "open-sse/services/combo.ts": 4080,
     "open-sse/services/combo/executeTargetAttempt.ts": 1258,