diff --git a/config/quality/file-size-baseline.json b/config/quality/file-size-baseline.json
index 5e01e87b80..5408e9d621 100644
--- a/config/quality/file-size-baseline.json
+++ b/config/quality/file-size-baseline.json
@@ -250,7 +250,7 @@
     "_rebaseline_2026_08_24_video_bridge_fu01_fu03_fu04_result_cache_tests": "PRs #11362 (FU-01 cache hardening) + #11382 (FU-03 visual dedup policy identity) + #11383 (FU-04 focused analysis mode) own test growth: videoBridgeResultCache.test.ts <1000->1040, +40 (sum of three stacked PRs boarded together in the same merge-batch, each adding its own cache-identity assertions on the shared result-cache seam). Owner pre-authorized rebaseline for legitimate PR growth (2026-08-19 directive).",
     "_rebaseline_basered_codebuddy_cn": "Base-red fix (#4664 CodeBuddy CN): oauth-providers-config.test.ts 867->870 (+3) to align the EXPECTED provider list/config with the codebuddy-cn provider that #4664 added to the registry without updating this test (it asserts 'exactly once').",
     "_rebaseline_pr4613_compatible_provider_groups": "Reconcile #4613 already-merged growth: providers-page-utils.test.ts 1004->1052 (+48, buildCompatibleProviderGroups partition unit test). Fast-gate PR->release does not run check:file-size, so this surfaced post-merge.",
-    "tests/integration/chat-pipeline.test.ts": 1736,
+    "tests/integration/chat-pipeline.test.ts": 1740,
     "tests/unit/account-fallback-service.test.ts": 2056,
     "tests/unit/batch_api.test.ts": 1353,
     "tests/unit/cc-compatible-provider.test.ts": 1225,
@@ -358,7 +358,7 @@
   "_rebaseline_2026_07_27_v3849_train1h": "Merge-train 1H (31 PRs) — owner-approved 2026-07-27. Two distinct causes, kept separate on purpose: (1) GENUINE irreducible growth at existing chokepoints — providerLimits/auth (#8632 Kimi quota-reset recovery), rateLimitManager (#8616 idle wedged limiters), models-catalog-route.test (#8610 OpenCode Go effort aliases); (2) COLLISION with #8585, which banked shrinks measured on the pre-train release tip while 30 sibling PRs in the SAME train grew those files again — chat/accountFallback (#8628), chatCore (#8613), videoGeneration (#8581), imageGeneration. The zero-headroom frozen entries cannot absorb either. Ceilings re-pinned to the post-merge tip; #8612 (also in this train) automates shrink-banking so this self-inflicted drift stops recurring. Detail: src/lib/usage/providerLimits.ts 1006->1013 (#8632); src/sse/services/auth.ts 2492->2508 (#8632); open-sse/services/rateLimitManager.ts 1014->1060 (#8616); src/sse/handlers/chat.ts 1842->1845 (#8628); open-sse/handlers/chatCore.ts 4939->4955 (#8613); open-sse/handlers/imageGeneration.ts 3100->3101 ((sem PR — teto do #8585)); open-sse/handlers/videoGeneration.ts 1038->1063 (#8581); open-sse/services/accountFallback.ts 1965->1966 (#8628); tests/unit/models-catalog-route.test.ts 1608->1636 (#8610)",
   "frozen": {
     "_rebaseline_2026_09_17_13947_tip_growth": "Base-red drain da PR #13947 (Refs #13866) — crescimento de PRODUCAO que chegou pelo tip e nunca foi rebaselinado; nenhum destes arquivos e tocado por esta PR. #12906 (d70f43d4, retry empty_response 502 + timeout de inicio de resposta ciente de reasoning): src/sse/handlers/chat.ts 2498->2500, src/sse/handlers/chatHelpers.ts 1231->1245, open-sse/utils/proxyFetch.ts 1275->1276, open-sse/utils/stream.ts 3098->3123. #12904 (f3acf4f8, injecao unica do system prompt global pos-traducao) + #12910 (051576fd, finalizacao de cache semantico por request id exato): open-sse/handlers/chatCore.ts 6181->6203. Anteriores ao lote, ja acima do cap na base 3d5baf13: open-sse/handlers/imageGeneration.ts 3293->3304 (#13748, b97338a8) e open-sse/services/combo/roundRobinCombo.ts 1213->1221 (#13776, aeba6b1a). Registrado contra o estado mergeado; nenhum outro cap e tocado.",
-    "src/sse/handlers/chatHelpers.ts": 1245,
+    "src/sse/handlers/chatHelpers.ts": 1246,
     "_rebaseline_2026_09_15_13609_mistral_ambiguous_401": "PR #13609 rework (maxmad64bis, bare Mistral 401 soft lockout behind MISTRAL_AMBIGUOUS_401_SOFT_LOCKOUT, default off). open-sse/services/accountFallback.ts 2469->2501 (+32): +14 are the change itself (shared-predicate + flag imports, the documented ambiguousAuth field on the checkFallbackError return type, and the flag-gated 401 branch formatted normally instead of the PR's 139-char squeezed configuredRule line); +18 are the lint-staged prettier pass normalizing lines that were already unformatted on the release tip (multi-import, ISO_RETRY_RE, two regex arrays, persistAntigravityFamilyCooldownIfQuota call, applyErrorState guard, trailing commas) — pure formatting, no logic. src/sse/services/auth.ts 3556->3557 (+1): markAccountUnavailable passes connectionId to resolveTerminalConnectionStatus so the soft-strike bound is per connection. The predicate and strike tracker live in the leaf open-sse/services/accountFallback/mistralAmbiguousAuth.ts (under cap). Covered by tests/unit/provider-401-ambiguous-runtime.test.ts (flag off/on, end-to-end through markAccountUnavailable).",
     "_rebaseline_2026_06_22_4644_deepseek_web_tools": "PR #4644 (BugsBag/robust deepseek-web tool-call parsing): open-sse/executors/deepseek-web.ts 1117->1125 (+8). The new agentic tool-call path emits surrounding text + reasoning before tool_calls and swaps to the dedicated deepseekWebTools.ts parser; the +8 lines are cohesive wiring at the existing transformSSE chokepoint (the parser itself lives in the new deepseekWebTools.ts file, already under cap). The PR's own fast-gate (PR->release) does not run check:file-size, so this surfaced only at release reconcile. Covered by tests/unit/deepseek-web-tools-variants.test.ts + deepseek-web-tools-execute.test.ts.",
     "_rebaseline_2026_06_23_4712_deepseek_web_tool_results": "PR for #4712 (deepseek-web drops role:tool): open-sse/executors/deepseek-web.ts 1125->1148 (+23). messagesToPrompt() now folds role:\"tool\" results into the single-prompt transcript (recovering the tool name from the preceding assistant tool_calls by tool_call_id) instead of silently dropping them; the lines are cohesive wiring inside the existing function. Covered by tests/unit/deepseek-web-tool-result-prompt-4712.test.ts.",
@@ -466,7 +466,7 @@
     "open-sse/executors/codex.ts": 1528,
     "open-sse/executors/cursor.ts": 1847,
     "open-sse/executors/muse-spark-web.ts": 1405,
-    "open-sse/handlers/chatCore.ts": 6203,
+    "open-sse/handlers/chatCore.ts": 6219,
     "open-sse/handlers/imageGeneration.ts": 3304,
     "open-sse/handlers/search.ts": 1789,
     "open-sse/mcp-server/schemas/tools.ts": 1621,
@@ -478,7 +478,7 @@
     "open-sse/translator/response/openai-responses.ts": 1466,
     "open-sse/utils/cursorAgentProtobuf.ts": 1547,
     "open-sse/utils/proxyFetch.ts": 1276,
-    "open-sse/utils/stream.ts": 3123,
+    "open-sse/utils/stream.ts": 3140,
     "open-sse/vendor/codex-chatgpt-web/adapters/chatgpt-web/browser-worker.ts": 4398,
     "open-sse/vendor/codex-chatgpt-web/bridge.ts": 1335,
     "src/app/(dashboard)/dashboard/HomePageClient.tsx": 1344,
@@ -702,5 +702,6 @@
   "_rebaseline_2026_09_07_streaming_wave": "Stacked growth from the SSE/streaming wave. open-sse/handlers/chatCore.ts 6021->6026 (+5): #12854 seeds the in-memory pending continuation state synchronously, before saveCallLogOperation's first await, closing the window where resolvePreviousResponseState finds nothing because the artifact write has not landed yet. open-sse/utils/stream.ts 3080->3098 (+18): #12828 emits the trailing usage-estimate chunk on the translate flush (#12151 had only covered passthrough, so translate-mode clients never saw token counts) and #12718 stops rebuilding a truncated summary from the collector's cap-dropped event array. Irreducible at the existing chokepoints — both are the flush/finalization points themselves. Covered by the continuation-store, translate-usage and collector-truncation suites.",
   "_rebaseline_2026_09_07_roundrobin_crosses_new_file_cap": "open-sse/services/combo/roundRobinCombo.ts 1198->1205, crossing the 1200 new-file cap. #12884 wires the quota-skip diagnostics into the round-robin attempt path so an ALL_TARGETS_SKIPPED 503 names which windows were exhausted instead of returning an opaque skip. The file was already at 1198 when #12811 lifted it out of combo.ts, so seven lines cross it; the diagnostics themselves live in quotaSkipDiagnostics.ts, under cap. Frozen rather than split: the natural next extraction is the attempt-loop body, which #12746/#12811 just moved and should settle before being cut again.",
   "_rebaseline_2026_09_08_13033_responses_websearch_sse": "Own growth after rebase onto v3.8.51 tip af49d4972: open-sse/handlers/chatCore.ts 6036->6035 (-1, check-file-size split-newline). Branch stamps clientRequestedResponsesStream before web_search fallback forces stream:false, then wraps JSON via synthesizeOpenAiSseFromJson. Call-site wiring next to the existing web_search non-stream fallback; no new god-file. Covered tests/unit/responses-websearch-sse-13033.test.ts.",
-  "_rebaseline_pr12723_kimi_narration": "PR #12723 Kimi narration recovery integration: cursor.ts 1764->1798 (+34 = +52 feature integration net, absorbed -18 of base growth headroom since the branch's own rebaseline). Every added line is functional PR wiring (scrubber creation with onToolCall emit closure, StreamCtx.narrationScrubber field, per-delta feed + finalizeKimiTurn hooks); the narration logic itself lives in open-sse/utils/kimiToolCallNarration.ts (593 lines). Covered by tests/unit/kimi-tool-call-narration.test.ts."
+  "_rebaseline_pr12723_kimi_narration": "PR #12723 Kimi narration recovery integration: cursor.ts 1764->1798 (+34 = +52 feature integration net, absorbed -18 of base growth headroom since the branch's own rebaseline). Every added line is functional PR wiring (scrubber creation with onToolCall emit closure, StreamCtx.narrationScrubber field, per-delta feed + finalizeKimiTurn hooks); the narration logic itself lives in open-sse/utils/kimiToolCallNarration.ts (593 lines). Covered by tests/unit/kimi-tool-call-narration.test.ts.",
+  "_rebaseline_2026_09_17_merge_wave_growth": "Crescimento da leva de merges de 2026-09-17 (lote /merge-batch + uplift). Cada teto foi atribuido a sua causa antes de subir, nao rebaselinado em bloco: src/sse/handlers/chatHelpers.ts 1245->1246 (#13551, combo scope no guard fail-closed do proxy); open-sse/handlers/chatCore.ts 6203->6219 (#12905 DSML/preamble, #13910 classificacao de 2xx disfarcado, #12904 injecao unica do system prompt pos-traducao); open-sse/utils/stream.ts 3123->3140 (#12905 e #12906 retry de empty_response 502 + timeout reasoning-aware); tests/integration/chat-pipeline.test.ts 1736->1740 (#13419, as duas assercoes de header exatas atualizadas para o charset=utf-8). Todos cobertos pelos testes das proprias PRs, verificados verdes no tip apos o merge."
 }