diff --git a/electron/ipc/handlers.ts b/electron/ipc/handlers.ts
index bbdda1cfb2..64504872bc 100644
--- a/electron/ipc/handlers.ts
+++ b/electron/ipc/handlers.ts
@@ -47,7 +47,6 @@ import {
 	rewindToMessage,
 	runChat,
 	runChatDefault,
-	runTimelineOperation,
 	selectSession,
 } from "../ai-edition/chat-service";
 import { DocumentService } from "../ai-edition/document-service";
@@ -3422,8 +3421,6 @@ export function registerIpcHandlers(
 			rewindToMessage(projectId, sessionId, messageId),
 		compactNow: (projectId, sessionId) =>
 			compactSessionNow(projectId, sessionId, aiEditionLlmConfig),
-		runTimelineOperation: (projectId, sessionId, op, conversationMessage) =>
-			runTimelineOperation(projectId, sessionId, op, conversationMessage, aiEditionDocuments),
 		getContextUsage: getSessionContextUsage,
 		runAiEditionChatDefault: (projectId, message, sink) =>
 			runChatDefault(projectId, message, aiEditionLlmConfig, sink),
diff --git a/electron/ipc/nativeBridge.ts b/electron/ipc/nativeBridge.ts
index c6e7a228f0..6997943dd6 100644
--- a/electron/ipc/nativeBridge.ts
+++ b/electron/ipc/nativeBridge.ts
@@ -79,18 +79,6 @@ export interface NativeBridgeContext {
 		projectId: string,
 		sessionId: string,
 	) => Promise<import("../../src/native/contracts").AiEditionChatCompactResult | null>;
-	runTimelineOperation: (
-		projectId: string,
-		sessionId: string,
-		op: import("../../src/native/contracts").AxcutTimelineOperation,
-		conversationMessage: string,
-	) => Promise<
-		| {
-				success: true;
-				result: import("../../src/native/contracts").AppliedTimelineOperation;
-		  }
-		| { success: false; error: string }
-	>;
 	getContextUsage: (
 		projectId: string,
 		sessionId: string,
@@ -247,7 +235,6 @@ export function registerNativeBridgeHandlers(context: NativeBridgeContext) {
 		undoLastToolBatch: context.undoAiEditionToolBatch,
 		rewindToMessage: context.rewindToMessage,
 		compactNow: context.compactNow,
-		runTimelineOperation: context.runTimelineOperation,
 		getContextUsage: context.getContextUsage,
 		getDefaultChatHistory: context.getAiEditionChatHistoryDefault,
 		clearDefaultChatHistory: context.clearAiEditionChatHistoryDefault,
@@ -644,16 +631,6 @@ export function registerNativeBridgeHandlers(context: NativeBridgeContext) {
 									sourceLanguage: request.payload.sourceLanguage,
 								}),
 							);
-						case "timeline.run":
-							return createSuccessResponse(
-								requestId,
-								await aiEditionService.chatRunTimelineOperation(
-									request.payload.projectId,
-									request.payload.sessionId,
-									request.payload.operation,
-									request.payload.conversationMessage,
-								),
-							);
 						default:
 							return createErrorResponse(
 								requestId,
diff --git a/electron/native-bridge/services/aiEditionService.ts b/electron/native-bridge/services/aiEditionService.ts
index 49b2a3aab1..343cc5913f 100644
--- a/electron/native-bridge/services/aiEditionService.ts
+++ b/electron/native-bridge/services/aiEditionService.ts
@@ -14,7 +14,6 @@ import type {
 	AiEditionLlmDisconnectResult,
 	AiEditionLlmSnapshot,
 	AiEditionProjectSummary,
-	AxcutTimelineOperation,
 } from "../../../src/native/contracts";
 import {
 	type CaptionTranslateSegment,
@@ -61,15 +60,6 @@ export interface AiEditionServiceOptions {
 		  }
 		| { success: false; error: string };
 	compactNow: (projectId: string, sessionId: string) => Promise<AiEditionChatCompactResult | null>;
-	runTimelineOperation: (
-		projectId: string,
-		sessionId: string,
-		operation: AxcutTimelineOperation,
-		conversationMessage: string,
-	) => Promise<
-		| { success: true; result: { document: unknown; summary: string } }
-		| { success: false; error: string }
-	>;
 	getContextUsage: (
 		projectId: string,
 		sessionId: string,
@@ -288,15 +278,6 @@ export class AiEditionService {
 		return this.options.compactNow(projectId, sessionId);
 	}
 
-	chatRunTimelineOperation(
-		projectId: string,
-		sessionId: string,
-		operation: AxcutTimelineOperation,
-		conversationMessage: string,
-	) {
-		return this.options.runTimelineOperation(projectId, sessionId, operation, conversationMessage);
-	}
-
 	async chatRunDefault(
 		projectId: string,
 		message: string,
diff --git a/src/components/ai-edition/LeftPanel.tsx b/src/components/ai-edition/LeftPanel.tsx
index 3bb5024a13..855a28e110 100644
--- a/src/components/ai-edition/LeftPanel.tsx
+++ b/src/components/ai-edition/LeftPanel.tsx
@@ -7,13 +7,8 @@ import { useScopedT } from "@/contexts/I18nContext";
 import { type AxcutAsset, ensureDocument } from "@/lib/ai-edition/schema";
 import { useProjectStore } from "@/lib/ai-edition/store/projectStore";
 import { useChatPromptBus } from "@/lib/ai-edition/store/useChatPromptBus";
-import { useOptimisticTimelineOps } from "@/lib/ai-edition/store/useOptimisticTimelineOps";
 import { nativeBridgeClient } from "@/native/client";
-import type {
-	AiEditionLlmConfig,
-	AiEditionToolCallSummary,
-	AxcutTimelineOperation,
-} from "@/native/contracts";
+import type { AiEditionLlmConfig, AiEditionToolCallSummary } from "@/native/contracts";
 import { formatBytes } from "@/utils/formatBytes";
 import {
 	getReasoningEffortLabel,
@@ -1139,32 +1134,6 @@ function ChatStripPanel() {
 		[editingTitle, handleRename, cancelEditTitle],
 	);
 
-	const { queue: queueTimelineOp, busy: queueBusy } = useOptimisticTimelineOps(
-		projectId,
-		activeSessionId,
-	);
-	const runAddTrim = useCallback(() => {
-		const raw = window.prompt(t("chat.addSkipRangePrompt"), "5-8");
-		if (!raw) return;
-		const m = raw.match(/^\s*(\d+(?:\.\d+)?)\s*[-–]\s*(\d+(?:\.\d+)?)\s*$/);
-		if (!m) {
-			toast.error(t("chat.addSkipRangeFormatError"));
-			return;
-		}
-		const startSec = Number(m[1]);
-		const endSec = Number(m[2]);
-		if (!Number.isFinite(startSec) || !Number.isFinite(endSec) || endSec <= startSec) {
-			toast.error(t("chat.addSkipRangeOrderError"));
-			return;
-		}
-		const op: AxcutTimelineOperation = {
-			type: "add_trim_range",
-			startSec,
-			endSec,
-		};
-		void queueTimelineOp(op, t("chat.addSkipRangeApplied", { startSec, endSec }));
-	}, [queueTimelineOp, t]);
-
 	return (
 		<aside className={styles.panel}>
 			<div className={styles.panelHeader}>
@@ -1402,25 +1371,6 @@ function ChatStripPanel() {
 								<path d="M9 6V4a1 1 0 0 1 1-1h4a1 1 0 0 1 1 1v2" />
 							</svg>
 						</button>
-						<button
-							type="button"
-							title={t("chat.addSkipRange")}
-							aria-label={t("chat.addSkipRange")}
-							disabled={!activeSessionId || queueBusy}
-							onClick={runAddTrim}
-							style={{
-								background: "transparent",
-								border: "1px solid var(--border-soft)",
-								borderRadius: "var(--r-sm)",
-								color: "var(--fg-2)",
-								font: "500 10px var(--font-body)",
-								padding: "2px 6px",
-								cursor: queueBusy ? "wait" : "pointer",
-								whiteSpace: "nowrap",
-							}}
-						>
-							{t("chat.skipButtonShort")}
-						</button>
 					</div>
 				) : null}
 			</div>
diff --git a/src/components/ai-edition/NewEditorShell.tsx b/src/components/ai-edition/NewEditorShell.tsx
index b530662c80..e17c533a44 100644
--- a/src/components/ai-edition/NewEditorShell.tsx
+++ b/src/components/ai-edition/NewEditorShell.tsx
@@ -13,6 +13,7 @@ import { transcribeAsset } from "@/lib/ai-edition/document/transcribe";
 import { type AxcutClip, documentSchema } from "@/lib/ai-edition/schema";
 import { useProjectStore } from "@/lib/ai-edition/store/projectStore";
 import { useUndoRedoShortcuts } from "@/lib/ai-edition/store/undo";
+import { useSequentialTimelineOps } from "@/lib/ai-edition/store/useSequentialTimelineOps";
 import { useTimeline } from "@/lib/ai-edition/store/useTimeline";
 import { matchesShortcut } from "@/lib/shortcuts";
 import { nativeBridgeClient } from "@/native";
@@ -111,10 +112,13 @@ export function NewEditorShell() {
 	}
 
 	// ponytail: serialise timeline-edit saves so two rapid Backspaces
-	// don't race each other's IPC save and overwrite one another in the
-	// store. Each new save chains off the previous one, so the store is
-	// always updated in the order the user issued the trims.
-	const saveQueueRef = useRef<Promise<void>>(Promise.resolve());
+	// don't race each other's save and overwrite one another in the
+	// store. The hook reads the doc inside the chain (after awaiting the
+	// previous save) — see its source for the race this fixes.
+	const { apply: applyTimelineOp } = useSequentialTimelineOps({
+		fallbackDocument: document,
+		saveDocument,
+	});
 
 	const promptUnsaved = useCallback(
 		(action: "close" | "new" | "open" | "record"): Promise<UnsavedChoice> => {
@@ -537,63 +541,24 @@ export function NewEditorShell() {
 	// trimRange (NOT a destructive word removal — the source text stays
 	// intact, the word is just hidden by the skip overlay). Mirrors
 	// axcut's `queueAddTrimRange` / `queueRemoveTrimRange` callbacks in
-	// apps/web/src/App.tsx.
+	// apps/web/src/App.tsx. The serialised save + inside-the-chain doc
+	// read is owned by `useSequentialTimelineOps` above.
 	const handleAddTrimRange = useCallback(
 		(assetId: string, startSec: number, endSec: number, reason: string) => {
-			// BUG corrigé : `doc` était lu de façon SYNCHRONE au moment de l'appel, puis seule la
-			// SAUVEGARDE était sérialisée via `saveQueueRef` — pas la LECTURE. Éditer le clip 1 puis
-			// le clip 2 avant que la chaîne async du premier save (import() + applyTimelineOperation +
-			// saveDocument, qui fait un aller-retour IPC) n'ait commit dans le store faisait lire au
-			// second appel le MÊME doc pré-edit-1 ; son propre saveDocument(next.document) écrasait
-			// alors le store avec un doc qui contient le trim du clip 2 mais PAS celui du clip 1 — les
-			// edits du clip 1 disparaissaient. La lecture doit donc elle aussi être mise dans la
-			// chaîne, après avoir attendu le tour précédent, pour toujours partir du doc déjà commit.
-			const queued = saveQueueRef.current
-				.then(() => import("@/lib/ai-edition/document/operations"))
-				.then(({ applyTimelineOperation }) => {
-					const doc = useProjectStore.getState().document ?? document;
-					if (!doc) return null;
-					return applyTimelineOperation(doc, {
-						type: "add_trim_range",
-						assetId,
-						startSec,
-						endSec,
-						reason,
-					});
-				})
-				.then((next) => next && saveDocument(next.document));
-			saveQueueRef.current = queued.then(
-				() => undefined,
-				() => undefined,
-			);
-			return queued;
+			void applyTimelineOp({ type: "add_trim_range", assetId, startSec, endSec, reason });
 		},
-		[document, saveDocument],
+		[applyTimelineOp],
 	);
 
 	const handleRemoveTrimRange = useCallback(
 		(trimId: string) => {
-			// See handleAddTrimRange above — same fix: the document read must be
-			// inside the queued chain, after awaiting the previous save.
-			const queued = saveQueueRef.current
-				.then(() => import("@/lib/ai-edition/document/operations"))
-				.then(({ applyTimelineOperation }) => {
-					const doc = useProjectStore.getState().document ?? document;
-					if (!doc) return null;
-					return applyTimelineOperation(doc, {
-						type: "remove_trim_range",
-						trimId,
-						reason: "Restored from transcript pane.",
-					});
-				})
-				.then((next) => next && saveDocument(next.document));
-			saveQueueRef.current = queued.then(
-				() => undefined,
-				() => undefined,
-			);
-			return queued;
+			void applyTimelineOp({
+				type: "remove_trim_range",
+				trimId,
+				reason: "Restored from transcript pane.",
+			});
 		},
-		[document, saveDocument],
+		[applyTimelineOp],
 	);
 
 	const handleSelectProject = useCallback(
diff --git a/src/i18n/locales/ar/editor.json b/src/i18n/locales/ar/editor.json
index 4e05f46435..bf035d34fa 100644
--- a/src/i18n/locales/ar/editor.json
+++ b/src/i18n/locales/ar/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "تعذّر حذف المحادثة",
 		"renameSessionFailed": "تعذّر إعادة تسمية المحادثة",
 		"reasoningEffortUpdateFailed": "تعذّر تحديث جهد الاستدلال",
-		"addSkipRangePrompt": "إضافة نطاق تخطٍّ\nالتنسيق: startSec-endSec (مثال: 1.2-3.4)",
-		"addSkipRangeFormatError": "استخدم startSec-endSec، مثال: 1.2-3.4",
-		"addSkipRangeOrderError": "يجب أن يكون endSec أكبر من startSec.",
-		"addSkipRangeApplied": "تمت إضافة تخطٍّ {{startSec}}–{{endSec}} ثانية.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} رمز مقدّر",
 		"contextPercent": "{{percent}}% من السياق",
 		"compactContext": "ضغط السياق",
@@ -253,8 +249,6 @@
 		"renameConversation": "إعادة تسمية المحادثة",
 		"deleteConversation": "حذف المحادثة",
 		"confirmDeleteConversation": "حذف \"{{title}}\"؟",
-		"addSkipRange": "إضافة نطاق تخطٍّ",
-		"skipButtonShort": "+ تخطٍّ",
 		"emptyState": "لا توجد رسائل بعد. اطلب من الوكيل قص الصمت أو تقليص الوقفات أو إضافة ترجمات.",
 		"welcome": {
 			"title": "أحضر ذكاءك الاصطناعي الخاص",
diff --git a/src/i18n/locales/en/editor.json b/src/i18n/locales/en/editor.json
index 5806e3adc4..90a5f02f98 100644
--- a/src/i18n/locales/en/editor.json
+++ b/src/i18n/locales/en/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Could not delete conversation",
 		"renameSessionFailed": "Could not rename conversation",
 		"reasoningEffortUpdateFailed": "Could not update reasoning effort",
-		"addSkipRangePrompt": "Add skip range\nFormat: startSec-endSec (e.g. 1.2-3.4)",
-		"addSkipRangeFormatError": "Use startSec-endSec, e.g. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec must be greater than startSec.",
-		"addSkipRangeApplied": "Added skip {{startSec}}–{{endSec}}s.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} estimated tokens",
 		"contextPercent": "{{percent}}% context",
 		"compactContext": "Compact context",
@@ -253,8 +249,6 @@
 		"renameConversation": "Rename conversation",
 		"deleteConversation": "Delete conversation",
 		"confirmDeleteConversation": "Delete \"{{title}}\"?",
-		"addSkipRange": "Add skip range",
-		"skipButtonShort": "+ skip",
 		"emptyState": "No messages yet. Ask the agent to cut silences, tighten pauses, or add captions.",
 		"welcome": {
 			"title": "Bring your own AI",
diff --git a/src/i18n/locales/es/editor.json b/src/i18n/locales/es/editor.json
index d7c2df0bf1..09219b0c60 100644
--- a/src/i18n/locales/es/editor.json
+++ b/src/i18n/locales/es/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "No se pudo eliminar la conversación",
 		"renameSessionFailed": "No se pudo renombrar la conversación",
 		"reasoningEffortUpdateFailed": "No se pudo actualizar el esfuerzo de razonamiento",
-		"addSkipRangePrompt": "Añadir rango de salto\nFormato: startSec-endSec (p. ej. 1.2-3.4)",
-		"addSkipRangeFormatError": "Usa startSec-endSec, p. ej. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec debe ser mayor que startSec.",
-		"addSkipRangeApplied": "Se añadió un salto de {{startSec}}–{{endSec}}s.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} tokens estimados",
 		"contextPercent": "{{percent}}% de contexto",
 		"compactContext": "Compactar contexto",
@@ -253,8 +249,6 @@
 		"renameConversation": "Renombrar conversación",
 		"deleteConversation": "Eliminar conversación",
 		"confirmDeleteConversation": "¿Eliminar \"{{title}}\"?",
-		"addSkipRange": "Añadir rango de salto",
-		"skipButtonShort": "+ salto",
 		"emptyState": "Aún no hay mensajes. Pide al agente que corte silencios, ajuste pausas o añada subtítulos.",
 		"welcome": {
 			"title": "Trae tu propia IA",
diff --git a/src/i18n/locales/fr/editor.json b/src/i18n/locales/fr/editor.json
index e3a8dbb35b..8e463b6692 100644
--- a/src/i18n/locales/fr/editor.json
+++ b/src/i18n/locales/fr/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Impossible de supprimer la conversation",
 		"renameSessionFailed": "Impossible de renommer la conversation",
 		"reasoningEffortUpdateFailed": "Impossible de mettre à jour l'effort de raisonnement",
-		"addSkipRangePrompt": "Ajouter une plage à ignorer\nFormat : startSec-endSec (ex. 1.2-3.4)",
-		"addSkipRangeFormatError": "Utilisez startSec-endSec, ex. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec doit être supérieur à startSec.",
-		"addSkipRangeApplied": "Plage ignorée ajoutée {{startSec}}–{{endSec}}s.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} jetons estimés",
 		"contextPercent": "{{percent}}% du contexte",
 		"compactContext": "Compacter le contexte",
@@ -253,8 +249,6 @@
 		"renameConversation": "Renommer la conversation",
 		"deleteConversation": "Supprimer la conversation",
 		"confirmDeleteConversation": "Supprimer « {{title}} » ?",
-		"addSkipRange": "Ajouter une plage à ignorer",
-		"skipButtonShort": "+ saut",
 		"emptyState": "Aucun message pour l'instant. Demandez à l'agent de couper les silences, resserrer les pauses ou ajouter des sous-titres.",
 		"welcome": {
 			"title": "Apportez votre IA",
diff --git a/src/i18n/locales/it/editor.json b/src/i18n/locales/it/editor.json
index fe0638f79e..0f7fbe7496 100644
--- a/src/i18n/locales/it/editor.json
+++ b/src/i18n/locales/it/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Impossibile eliminare la conversazione",
 		"renameSessionFailed": "Impossibile rinominare la conversazione",
 		"reasoningEffortUpdateFailed": "Impossibile aggiornare lo sforzo di ragionamento",
-		"addSkipRangePrompt": "Aggiungi intervallo da saltare\nFormato: startSec-endSec (es. 1.2-3.4)",
-		"addSkipRangeFormatError": "Usa startSec-endSec, es. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec deve essere maggiore di startSec.",
-		"addSkipRangeApplied": "Aggiunto salto {{startSec}}–{{endSec}}s.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} token stimati",
 		"contextPercent": "{{percent}}% di contesto",
 		"compactContext": "Comprimi contesto",
@@ -253,8 +249,6 @@
 		"renameConversation": "Rinomina conversazione",
 		"deleteConversation": "Elimina conversazione",
 		"confirmDeleteConversation": "Eliminare \"{{title}}\"?",
-		"addSkipRange": "Aggiungi intervallo da saltare",
-		"skipButtonShort": "+ salto",
 		"emptyState": "Nessun messaggio ancora. Chiedi all'agente di tagliare i silenzi, stringere le pause o aggiungere sottotitoli.",
 		"welcome": {
 			"title": "Porta la tua IA",
diff --git a/src/i18n/locales/ja-JP/editor.json b/src/i18n/locales/ja-JP/editor.json
index 2e87b27f11..0b50559052 100644
--- a/src/i18n/locales/ja-JP/editor.json
+++ b/src/i18n/locales/ja-JP/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "会話を削除できませんでした",
 		"renameSessionFailed": "会話の名前を変更できませんでした",
 		"reasoningEffortUpdateFailed": "推論の労力を更新できませんでした",
-		"addSkipRangePrompt": "スキップ範囲を追加\n形式：startSec-endSec（例：1.2-3.4）",
-		"addSkipRangeFormatError": "startSec-endSec の形式を使用してください（例：1.2-3.4）",
-		"addSkipRangeOrderError": "endSec は startSec より大きくする必要があります。",
-		"addSkipRangeApplied": "{{startSec}}–{{endSec}}秒のスキップを追加しました。",
 		"contextTooltip": "推定トークン数 {{usedTokens}} / {{budgetTokens}}",
 		"contextPercent": "コンテキスト {{percent}}%",
 		"compactContext": "コンテキストを圧縮",
@@ -253,8 +249,6 @@
 		"renameConversation": "会話の名前を変更",
 		"deleteConversation": "会話を削除",
 		"confirmDeleteConversation": "「{{title}}」を削除しますか？",
-		"addSkipRange": "スキップ範囲を追加",
-		"skipButtonShort": "+ スキップ",
 		"emptyState": "まだメッセージはありません。エージェントに無音のカット、間の調整、字幕の追加を依頼してみましょう。",
 		"welcome": {
 			"title": "自分のAIを持ち込もう",
diff --git a/src/i18n/locales/ko-KR/editor.json b/src/i18n/locales/ko-KR/editor.json
index b50fd002d9..4e97f0736c 100644
--- a/src/i18n/locales/ko-KR/editor.json
+++ b/src/i18n/locales/ko-KR/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "대화를 삭제할 수 없습니다",
 		"renameSessionFailed": "대화 이름을 변경할 수 없습니다",
 		"reasoningEffortUpdateFailed": "추론 노력 수준을 업데이트할 수 없습니다",
-		"addSkipRangePrompt": "건너뛸 구간 추가\n형식: startSec-endSec (예: 1.2-3.4)",
-		"addSkipRangeFormatError": "startSec-endSec 형식을 사용하세요 (예: 1.2-3.4)",
-		"addSkipRangeOrderError": "endSec은 startSec보다 커야 합니다.",
-		"addSkipRangeApplied": "{{startSec}}–{{endSec}}초 구간 건너뛰기를 추가했습니다.",
 		"contextTooltip": "예상 토큰 {{usedTokens}} / {{budgetTokens}}",
 		"contextPercent": "컨텍스트 {{percent}}%",
 		"compactContext": "컨텍스트 압축",
@@ -253,8 +249,6 @@
 		"renameConversation": "대화 이름 변경",
 		"deleteConversation": "대화 삭제",
 		"confirmDeleteConversation": "\"{{title}}\"을(를) 삭제할까요?",
-		"addSkipRange": "건너뛸 구간 추가",
-		"skipButtonShort": "+ 건너뛰기",
 		"emptyState": "아직 메시지가 없습니다. 에이전트에게 무음 구간 자르기, 일시정지 조이기, 자막 추가를 요청해 보세요.",
 		"welcome": {
 			"title": "내 AI를 가져오세요",
diff --git a/src/i18n/locales/pt-BR/editor.json b/src/i18n/locales/pt-BR/editor.json
index dfdc18cfe2..63e56581fd 100644
--- a/src/i18n/locales/pt-BR/editor.json
+++ b/src/i18n/locales/pt-BR/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Não foi possível excluir a conversa",
 		"renameSessionFailed": "Não foi possível renomear a conversa",
 		"reasoningEffortUpdateFailed": "Não foi possível atualizar o esforço de raciocínio",
-		"addSkipRangePrompt": "Adicionar intervalo a pular\nFormato: startSec-endSec (ex.: 1.2-3.4)",
-		"addSkipRangeFormatError": "Use startSec-endSec, ex.: 1.2-3.4",
-		"addSkipRangeOrderError": "endSec deve ser maior que startSec.",
-		"addSkipRangeApplied": "Salto de {{startSec}}–{{endSec}}s adicionado.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} tokens estimados",
 		"contextPercent": "{{percent}}% de contexto",
 		"compactContext": "Compactar contexto",
@@ -253,8 +249,6 @@
 		"renameConversation": "Renomear conversa",
 		"deleteConversation": "Excluir conversa",
 		"confirmDeleteConversation": "Excluir \"{{title}}\"?",
-		"addSkipRange": "Adicionar intervalo a pular",
-		"skipButtonShort": "+ pular",
 		"emptyState": "Ainda não há mensagens. Peça ao agente para cortar silêncios, apertar pausas ou adicionar legendas.",
 		"welcome": {
 			"title": "Traga a sua própria IA",
diff --git a/src/i18n/locales/ru/editor.json b/src/i18n/locales/ru/editor.json
index f2861918ba..6722076484 100644
--- a/src/i18n/locales/ru/editor.json
+++ b/src/i18n/locales/ru/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Не удалось удалить беседу",
 		"renameSessionFailed": "Не удалось переименовать беседу",
 		"reasoningEffortUpdateFailed": "Не удалось обновить уровень рассуждений",
-		"addSkipRangePrompt": "Добавить диапазон пропуска\nФормат: startSec-endSec (напр. 1.2-3.4)",
-		"addSkipRangeFormatError": "Используйте startSec-endSec, напр. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec должен быть больше startSec.",
-		"addSkipRangeApplied": "Добавлен пропуск {{startSec}}–{{endSec}} с.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} расчётных токенов",
 		"contextPercent": "{{percent}}% контекста",
 		"compactContext": "Сжать контекст",
@@ -253,8 +249,6 @@
 		"renameConversation": "Переименовать беседу",
 		"deleteConversation": "Удалить беседу",
 		"confirmDeleteConversation": "Удалить «{{title}}»?",
-		"addSkipRange": "Добавить диапазон пропуска",
-		"skipButtonShort": "+ пропуск",
 		"emptyState": "Пока нет сообщений. Попросите агента вырезать паузы, уплотнить их или добавить субтитры.",
 		"welcome": {
 			"title": "Подключите свой ИИ",
diff --git a/src/i18n/locales/tr/editor.json b/src/i18n/locales/tr/editor.json
index e5054501b9..c683d9273a 100644
--- a/src/i18n/locales/tr/editor.json
+++ b/src/i18n/locales/tr/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Konuşma silinemedi",
 		"renameSessionFailed": "Konuşma yeniden adlandırılamadı",
 		"reasoningEffortUpdateFailed": "Akıl yürütme çabası güncellenemedi",
-		"addSkipRangePrompt": "Atlama aralığı ekle\nBiçim: startSec-endSec (örn. 1.2-3.4)",
-		"addSkipRangeFormatError": "startSec-endSec kullanın, örn. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec, startSec'ten büyük olmalıdır.",
-		"addSkipRangeApplied": "{{startSec}}–{{endSec}} sn atlama eklendi.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} tahmini belirteç",
 		"contextPercent": "%{{percent}} bağlam",
 		"compactContext": "Bağlamı sıkıştır",
@@ -253,8 +249,6 @@
 		"renameConversation": "Konuşmayı yeniden adlandır",
 		"deleteConversation": "Konuşmayı sil",
 		"confirmDeleteConversation": "\"{{title}}\" silinsin mi?",
-		"addSkipRange": "Atlama aralığı ekle",
-		"skipButtonShort": "+ atla",
 		"emptyState": "Henüz mesaj yok. Aracıdan sessizlikleri kesmesini, duraklamaları sıkılaştırmasını veya altyazı eklemesini isteyin.",
 		"welcome": {
 			"title": "Kendi yapay zekanızı getirin",
diff --git a/src/i18n/locales/vi/editor.json b/src/i18n/locales/vi/editor.json
index e79a60ac48..34e86cc22f 100644
--- a/src/i18n/locales/vi/editor.json
+++ b/src/i18n/locales/vi/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "Không thể xóa cuộc trò chuyện",
 		"renameSessionFailed": "Không thể đổi tên cuộc trò chuyện",
 		"reasoningEffortUpdateFailed": "Không thể cập nhật mức độ suy luận",
-		"addSkipRangePrompt": "Thêm khoảng bỏ qua\nĐịnh dạng: startSec-endSec (vd. 1.2-3.4)",
-		"addSkipRangeFormatError": "Dùng định dạng startSec-endSec, vd. 1.2-3.4",
-		"addSkipRangeOrderError": "endSec phải lớn hơn startSec.",
-		"addSkipRangeApplied": "Đã thêm khoảng bỏ qua {{startSec}}–{{endSec}}s.",
 		"contextTooltip": "{{usedTokens}} / {{budgetTokens}} token ước tính",
 		"contextPercent": "{{percent}}% ngữ cảnh",
 		"compactContext": "Nén ngữ cảnh",
@@ -253,8 +249,6 @@
 		"renameConversation": "Đổi tên cuộc trò chuyện",
 		"deleteConversation": "Xóa cuộc trò chuyện",
 		"confirmDeleteConversation": "Xóa \"{{title}}\"?",
-		"addSkipRange": "Thêm khoảng bỏ qua",
-		"skipButtonShort": "+ bỏ qua",
 		"emptyState": "Chưa có tin nhắn nào. Yêu cầu tác nhân cắt khoảng lặng, rút ngắn khoảng dừng hoặc thêm phụ đề.",
 		"welcome": {
 			"title": "Mang theo AI của bạn",
diff --git a/src/i18n/locales/zh-CN/editor.json b/src/i18n/locales/zh-CN/editor.json
index d0bea68298..8afd7be95d 100644
--- a/src/i18n/locales/zh-CN/editor.json
+++ b/src/i18n/locales/zh-CN/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "无法删除对话",
 		"renameSessionFailed": "无法重命名对话",
 		"reasoningEffortUpdateFailed": "无法更新推理强度",
-		"addSkipRangePrompt": "添加跳过范围\n格式：startSec-endSec（例如 1.2-3.4）",
-		"addSkipRangeFormatError": "请使用 startSec-endSec 格式，例如 1.2-3.4",
-		"addSkipRangeOrderError": "endSec 必须大于 startSec。",
-		"addSkipRangeApplied": "已添加跳过 {{startSec}}–{{endSec}} 秒。",
 		"contextTooltip": "预估 {{usedTokens}} / {{budgetTokens}} 个 token",
 		"contextPercent": "上下文 {{percent}}%",
 		"compactContext": "压缩上下文",
@@ -253,8 +249,6 @@
 		"renameConversation": "重命名对话",
 		"deleteConversation": "删除对话",
 		"confirmDeleteConversation": "删除 \"{{title}}\"？",
-		"addSkipRange": "添加跳过范围",
-		"skipButtonShort": "+ 跳过",
 		"emptyState": "暂无消息。可以让代理剪掉静音、收紧停顿或添加字幕。",
 		"welcome": {
 			"title": "自带你的 AI",
diff --git a/src/i18n/locales/zh-TW/editor.json b/src/i18n/locales/zh-TW/editor.json
index c3ee62bb26..7d4db14ffe 100644
--- a/src/i18n/locales/zh-TW/editor.json
+++ b/src/i18n/locales/zh-TW/editor.json
@@ -238,10 +238,6 @@
 		"deleteSessionFailed": "無法刪除對話",
 		"renameSessionFailed": "無法重新命名對話",
 		"reasoningEffortUpdateFailed": "無法更新推理強度",
-		"addSkipRangePrompt": "新增跳過範圍\n格式：startSec-endSec（例如 1.2-3.4）",
-		"addSkipRangeFormatError": "請使用 startSec-endSec 格式，例如 1.2-3.4",
-		"addSkipRangeOrderError": "endSec 必須大於 startSec。",
-		"addSkipRangeApplied": "已新增跳過 {{startSec}}–{{endSec}} 秒。",
 		"contextTooltip": "預估 {{usedTokens}} / {{budgetTokens}} 個權杖",
 		"contextPercent": "上下文 {{percent}}%",
 		"compactContext": "壓縮上下文",
@@ -253,8 +249,6 @@
 		"renameConversation": "重新命名對話",
 		"deleteConversation": "刪除對話",
 		"confirmDeleteConversation": "刪除「{{title}}」？",
-		"addSkipRange": "新增跳過範圍",
-		"skipButtonShort": "+ 跳過",
 		"emptyState": "尚無訊息。可以請代理剪掉靜音、收緊停頓或加入字幕。",
 		"welcome": {
 			"title": "自帶你的 AI",
diff --git a/src/lib/ai-edition/store/useOptimisticTimelineOps.ts b/src/lib/ai-edition/store/useOptimisticTimelineOps.ts
deleted file mode 100644
index 5e981ce028..0000000000
--- a/src/lib/ai-edition/store/useOptimisticTimelineOps.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-// ponytail: optimistic timeline-ops state machine. Mirrors axcut's
-// `queueTimelineOperation` flow but on a smaller surface: we read the
-// project store, apply the op locally for instant UI feedback, fire
-// the IPC, then either commit the server's authoritative document or
-// roll back on failure. Session messages aren't touched locally — the
-// server appends the summary message before returning.
-
-import { useCallback, useState } from "react";
-import { toast } from "sonner";
-import { nativeBridgeClient } from "@/native/client";
-import type { AxcutTimelineOperation } from "@/native/contracts";
-import { applyTimelineOperation } from "../document/operations";
-import type { AxcutDocument } from "../schema";
-import { useProjectStore } from "./projectStore";
-
-export interface OptimisticTimelineOps {
-	queue: (operation: AxcutTimelineOperation, conversationMessage: string) => Promise<void>;
-	busy: boolean;
-}
-
-export function useOptimisticTimelineOps(
-	projectId: string | null,
-	sessionId: string | null,
-): OptimisticTimelineOps {
-	const [busy, setBusy] = useState(false);
-
-	const queue = useCallback(
-		async (operation: AxcutTimelineOperation, conversationMessage: string) => {
-			if (!projectId || !sessionId) {
-				toast.error("Open a project to run a timeline operation.");
-				return;
-			}
-			const store = useProjectStore.getState();
-			const previous = store.document;
-			if (!previous) {
-				toast.error("No project document loaded yet.");
-				return;
-			}
-			const optimistic = applyTimelineOperation(previous, operation).document;
-			store.setDocument(optimistic);
-			setBusy(true);
-			try {
-				const result = await nativeBridgeClient.aiEdition.runTimelineOperation(
-					projectId,
-					sessionId,
-					operation,
-					conversationMessage,
-				);
-				if (!result.success) {
-					store.setDocument(previous);
-					toast.error("Timeline edit failed", { description: result.error });
-					return;
-				}
-				// ponytail: keep the optimistic doc on failure-free success. The
-				// server-applied doc is byte-identical in the happy path; only
-				// when normalisation diverges do we need to swap.
-				const serverDoc = result.result.document as AxcutDocument;
-				store.setDocument(serverDoc);
-				toast.success(result.result.summary);
-			} catch (err) {
-				store.setDocument(previous);
-				toast.error("Timeline edit failed", {
-					description: err instanceof Error ? err.message : String(err),
-				});
-			} finally {
-				setBusy(false);
-			}
-		},
-		[projectId, sessionId],
-	);
-
-	return { queue, busy };
-}
diff --git a/src/lib/ai-edition/store/useSequentialTimelineOps.test.ts b/src/lib/ai-edition/store/useSequentialTimelineOps.test.ts
new file mode 100644
index 0000000000..6ad4461cf1
--- /dev/null
+++ b/src/lib/ai-edition/store/useSequentialTimelineOps.test.ts
@@ -0,0 +1,216 @@
+// ponytail: tests for the queued timeline-op hook. The hook used to live
+// inline in NewEditorShell.tsx (saveQueueRef + handleAddTrimRange /
+// handleRemoveTrimRange) and was untested; the bug it fixed (synchronous
+// doc read vs async save) is the kind of regression that slips back in
+// without a test. These cover the three properties the inline pattern
+// depended on:
+//   1. Two concurrent calls are serialised — op N+1 reads the doc op N
+//      committed, not the pre-op-N doc.
+//   2. A save rejection doesn't poison the queue; the next call still
+//      has a resolved promise to chain off.
+//   3. The store-empty fallback (no project loaded) returns null instead
+//      of crashing.
+
+import { act, renderHook } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { type AxcutDocument, createEmptyDocument } from "@/lib/ai-edition/schema";
+import { useProjectStore } from "./projectStore";
+import { useSequentialTimelineOps } from "./useSequentialTimelineOps";
+
+function makeDocWithAsset(): AxcutDocument {
+	const base = createEmptyDocument({ projectId: "proj_seq", title: "seq" });
+	return {
+		...base,
+		assets: [
+			{
+				id: "asset_1",
+				kind: "video",
+				label: "screen.webm",
+				originalPath: "/tmp/screen.webm",
+				durationSec: 30,
+				video: { codec: "unknown", width: 1920, height: 1080, fps: 0 },
+				cameraTrack: null,
+			},
+		],
+		project: { ...base.project, primaryAssetId: "asset_1" },
+		timeline: {
+			...base.timeline,
+			clips: [
+				{
+					id: "clip_a",
+					assetId: "asset_1",
+					sourceStartSec: 0,
+					sourceEndSec: 10,
+					timelineStartSec: 0,
+					timelineEndSec: 10,
+					wordRefs: [],
+					origin: "user",
+					reason: "",
+				},
+			],
+		},
+	};
+}
+
+beforeEach(() => {
+	useProjectStore.getState().clear();
+});
+
+afterEach(() => {
+	vi.clearAllMocks();
+});
+
+describe("useSequentialTimelineOps", () => {
+	it("serialises calls: op N+1 reads the doc op N committed", async () => {
+		const seed = makeDocWithAsset();
+		useProjectStore.setState({ document: seed });
+
+		const callOrder: string[] = [];
+		const saveDocument = vi.fn(async (doc: AxcutDocument) => {
+			// Mirror the real store: write the saved doc back so the next
+			// call in the queue sees the latest committed state.
+			useProjectStore.getState().setDocument(doc);
+			// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+			callOrder.push(doc.timeline.trimRanges[0]?.startSec.toString() ?? "empty");
+		});
+
+		const { result } = renderHook(() =>
+			useSequentialTimelineOps({ fallbackDocument: seed, saveDocument }),
+		);
+
+		const op1 = {
+			type: "add_trim_range" as const,
+			assetId: "asset_1",
+			startSec: 1,
+			endSec: 2,
+			reason: "first",
+		};
+		const op2 = {
+			type: "add_trim_range" as const,
+			assetId: "asset_1",
+			startSec: 5,
+			endSec: 6,
+			reason: "second",
+		};
+
+		await act(async () => {
+			const r1 = result.current.apply(op1);
+			const r2 = result.current.apply(op2);
+			await Promise.all([r1, r2]);
+		});
+
+		// Both saves fired in queue order (callOrder), and the second save
+		// saw a doc that ALREADY had the first trim applied.
+		expect(callOrder).toEqual(["1", "1"]);
+		expect(saveDocument).toHaveBeenCalledTimes(2);
+		const doc1 = saveDocument.mock.calls[0]?.[0] as AxcutDocument;
+		const doc2 = saveDocument.mock.calls[1]?.[0] as AxcutDocument;
+		expect(doc1.timeline.trimRanges).toHaveLength(1);
+		expect(doc1.timeline.trimRanges[0]?.startSec).toBe(1);
+		expect(doc2.timeline.trimRanges).toHaveLength(2);
+		expect(doc2.timeline.trimRanges.map((t) => t.startSec).sort()).toEqual([1, 5]);
+	});
+
+	it("swallows save errors so the next call can still proceed", async () => {
+		const seed = makeDocWithAsset();
+		useProjectStore.setState({ document: seed });
+
+		const saveDocument = vi
+			.fn<(doc: AxcutDocument) => Promise<void>>()
+			.mockRejectedValueOnce(new Error("save failed"))
+			.mockImplementationOnce(async (doc) => {
+				useProjectStore.getState().setDocument(doc);
+			});
+
+		const { result } = renderHook(() =>
+			useSequentialTimelineOps({ fallbackDocument: seed, saveDocument }),
+		);
+
+		const op1 = {
+			type: "add_trim_range" as const,
+			assetId: "asset_1",
+			startSec: 1,
+			endSec: 2,
+			reason: "first",
+		};
+		const op2 = {
+			type: "remove_trim_range" as const,
+			trimId: "trim_doesnt_exist",
+			reason: "second",
+		};
+
+		let firstSettled = false;
+		let secondSettled = false;
+		await act(async () => {
+			const p1 = result.current.apply(op1);
+			const p2 = result.current.apply(op2);
+			await p1.catch((err: unknown) => {
+				firstSettled = true;
+				expect((err as Error).message).toBe("save failed");
+			});
+			await p2.then(() => {
+				secondSettled = true;
+			});
+		});
+
+		expect(firstSettled).toBe(true);
+		expect(secondSettled).toBe(true);
+		// The queue survived the first failure — both saves were attempted.
+		expect(saveDocument).toHaveBeenCalledTimes(2);
+	});
+
+	it("returns null when the store has no document and no fallback is supplied", async () => {
+		const saveDocument = vi.fn(async () => undefined);
+		const { result } = renderHook(() =>
+			useSequentialTimelineOps({ fallbackDocument: null, saveDocument }),
+		);
+
+		const op = {
+			type: "add_trim_range" as const,
+			assetId: "asset_1",
+			startSec: 1,
+			endSec: 2,
+			reason: "no doc",
+		};
+
+		let resolved: AxcutDocument | null | undefined;
+		await act(async () => {
+			resolved = await result.current.apply(op);
+		});
+
+		expect(resolved).toBeNull();
+		// And the queue should NOT have called saveDocument — nothing to save.
+		expect(saveDocument).not.toHaveBeenCalled();
+	});
+
+	it("returns the saved document from the apply() promise", async () => {
+		const seed = makeDocWithAsset();
+		useProjectStore.setState({ document: seed });
+
+		const saveDocument = vi.fn(async (doc: AxcutDocument) => {
+			useProjectStore.getState().setDocument(doc);
+		});
+
+		const { result } = renderHook(() =>
+			useSequentialTimelineOps({ fallbackDocument: seed, saveDocument }),
+		);
+
+		const op = {
+			type: "add_trim_range" as const,
+			assetId: "asset_1",
+			startSec: 1,
+			endSec: 2,
+			reason: "x",
+		};
+
+		let returned: AxcutDocument | null | undefined;
+		await act(async () => {
+			returned = await result.current.apply(op);
+		});
+
+		expect(returned).toBeDefined();
+		expect(returned?.timeline.trimRanges).toHaveLength(1);
+		expect(returned?.timeline.trimRanges[0]?.startSec).toBe(1);
+		expect(returned?.timeline.trimRanges[0]?.endSec).toBe(2);
+	});
+});
diff --git a/src/lib/ai-edition/store/useSequentialTimelineOps.ts b/src/lib/ai-edition/store/useSequentialTimelineOps.ts
new file mode 100644
index 0000000000..642c5a435c
--- /dev/null
+++ b/src/lib/ai-edition/store/useSequentialTimelineOps.ts
@@ -0,0 +1,71 @@
+// ponytail: serialise timeline-edit saves so two rapid calls don't race
+// each other's save and overwrite one another in the store. The previous
+// in-component implementation in NewEditorShell.tsx had a subtle race
+// where the doc was read SYNCHRONOUSLY at call time but the save was
+// serialised; two concurrent calls would both read the same pre-edit
+// doc and the second save would clobber the first edit. The fix is to
+// read the doc INSIDE the chain, after awaiting the previous save, so
+// every call sees the doc state the previous call committed.
+//
+// Errors are swallowed when advancing the queue ref so a failed save
+// doesn't poison the queue (the next call still has a resolved promise
+// to chain off). The original promise returned to the caller is NOT
+// swallowed — the caller can await it and observe the rejection.
+
+import { useCallback, useRef } from "react";
+import type { AxcutTimelineOperation } from "@/lib/ai-edition/document/operations";
+import type { AxcutDocument } from "@/lib/ai-edition/schema";
+import { useProjectStore } from "./projectStore";
+
+export interface SequentialTimelineOps {
+	/**
+	 * Queue a timeline op. The op is applied to the latest committed
+	 * document (read from the project store inside the queue, after the
+	 * previous op's save has resolved), and the resulting document is
+	 * saved. Calls are serialised — op N+1 reads the doc op N wrote.
+	 *
+	 * Returns the saved document, or `null` if no project document is
+	 * loaded (store empty AND no fallback supplied).
+	 */
+	apply: (op: AxcutTimelineOperation) => Promise<AxcutDocument | null>;
+}
+
+export function useSequentialTimelineOps(options: {
+	/** Used only when the project store has no document yet. */
+	fallbackDocument: AxcutDocument | null;
+	/** Persist a document. The hook awaits this before unblocking the queue. */
+	saveDocument: (doc: AxcutDocument) => Promise<unknown>;
+}): SequentialTimelineOps {
+	const { fallbackDocument, saveDocument } = options;
+	const saveQueueRef = useRef<Promise<unknown>>(Promise.resolve());
+
+	const apply = useCallback(
+		(op: AxcutTimelineOperation): Promise<AxcutDocument | null> => {
+			const queued = saveQueueRef.current
+				.then(() => import("@/lib/ai-edition/document/operations"))
+				.then(({ applyTimelineOperation }) => {
+					// Read the doc inside the chain. The store holds the
+					// latest committed state because the previous call's
+					// save has already resolved by the time this .then
+					// runs — see the file header for the race this fixes.
+					const doc = useProjectStore.getState().document ?? fallbackDocument;
+					if (!doc) return null;
+					const applied = applyTimelineOperation(doc, op);
+					return saveDocument(applied.document).then(() => applied.document);
+				});
+			// Swallow rejection when advancing the queue so a failed save
+			// doesn't poison the queue — the next call still has a
+			// resolved promise to chain off. The original `queued` is
+			// returned to the caller, who can await it and observe the
+			// rejection.
+			saveQueueRef.current = queued.then(
+				() => undefined,
+				() => undefined,
+			);
+			return queued;
+		},
+		[fallbackDocument, saveDocument],
+	);
+
+	return { apply };
+}
diff --git a/src/native/client.ts b/src/native/client.ts
index 3f96495f61..b3a00d29ab 100644
--- a/src/native/client.ts
+++ b/src/native/client.ts
@@ -14,7 +14,6 @@ import {
 	type AiEditionLlmProviderModelsResult,
 	type AiEditionLlmSnapshot,
 	type AiEditionProjectSummary,
-	type AxcutTimelineOperation,
 	type CursorCapabilities,
 	type CursorRecordingData,
 	type CursorTelemetryPoint,
@@ -349,19 +348,5 @@ export const nativeBridgeClient = {
 				action: "captions.translate",
 				payload: input,
 			}),
-		runTimelineOperation: (
-			projectId: string,
-			sessionId: string,
-			operation: AxcutTimelineOperation,
-			conversationMessage: string,
-		) =>
-			requireNativeBridgeData<
-				| { success: true; result: { document: unknown; summary: string } }
-				| { success: false; error: string }
-			>({
-				domain: "aiEdition",
-				action: "timeline.run",
-				payload: { projectId, sessionId, operation, conversationMessage },
-			}),
 	},
 };
diff --git a/src/native/contracts.ts b/src/native/contracts.ts
index 5580984e5a..2fca2d84d9 100644
--- a/src/native/contracts.ts
+++ b/src/native/contracts.ts
@@ -280,17 +280,6 @@ export interface AiEditionChatBudget {
 	fillPercent: number;
 }
 
-// re-export of the timeline-operation discriminated union so the
-// IPC contract type and the renderer share one shape. Kept here (not in
-// src/lib/ai-edition/document/operations) so the IPC type bundle stays
-// self-contained.
-import type {
-	AppliedTimelineOperation,
-	AxcutTimelineOperation,
-} from "../lib/ai-edition/document/operations";
-
-export type { AppliedTimelineOperation, AxcutTimelineOperation };
-
 export interface AiEditionChatCompactResult {
 	session: AiEditionChatSession;
 	summaryMessageId: string | null;
@@ -635,17 +624,6 @@ export type NativeBridgeRequest =
 			};
 			requestId?: string;
 	  }
-	| {
-			domain: "aiEdition";
-			action: "timeline.run";
-			payload: {
-				projectId: string;
-				sessionId: string;
-				operation: AxcutTimelineOperation;
-				conversationMessage: string;
-			};
-			requestId?: string;
-	  }
 	| {
 			domain: "compositor";
 			action: "createView";