diff --git a/src/CodexAcpServer.ts b/src/CodexAcpServer.ts
index 80486fe..2682f62 100644
--- a/src/CodexAcpServer.ts
+++ b/src/CodexAcpServer.ts
@@ -66,6 +66,11 @@ import {
 import packageJson from "../package.json";
 import {isJetBrains2026_1Client} from "./JBUtils";
 import {resolveTerminalOutputMode, type TerminalOutputMode} from "./TerminalOutputMode";
+import {
+    createAgentTextMessageChunk,
+    createAgentTextThoughtChunk,
+    createUserMessageChunk,
+} from "./ContentChunks";
 
 export interface ThreadGoalSnapshot {
     objective: string;
@@ -966,6 +971,7 @@ export class CodexAcpServer {
             case "agentMessage":
                 return [{
                     sessionUpdate: "agent_message_chunk",
+                    messageId: item.id,
                     content: { type: "text", text: item.text },
                 }];
             case "reasoning":
@@ -1005,13 +1011,11 @@ export class CodexAcpServer {
 
     private createUserMessageUpdates(item: ThreadItem & { type: "userMessage" }): UpdateSessionEvent[] {
         const updates: UpdateSessionEvent[] = [];
+        const messageId = item.id;
         for (const input of item.content) {
             const blocks = this.userInputToContentBlocks(input);
             for (const block of blocks) {
-                updates.push({
-                    sessionUpdate: "user_message_chunk",
-                    content: block,
-                });
+                updates.push(createUserMessageChunk(block, messageId));
             }
         }
         return updates;
@@ -1019,10 +1023,8 @@ export class CodexAcpServer {
 
     private createReasoningUpdates(item: ThreadItem & { type: "reasoning" }): UpdateSessionEvent[] {
         const parts = item.summary.length > 0 ? item.summary : item.content;
-        return parts.map((text) => ({
-            sessionUpdate: "agent_thought_chunk",
-            content: { type: "text", text: text },
-        }));
+        const messageId = item.id;
+        return parts.map((text) => createAgentTextThoughtChunk(text, messageId));
     }
 
     private createWebSearchUpdate(
@@ -1589,13 +1591,7 @@ export class CodexAcpServer {
         }
         await this.connection.notify(acp.methods.client.session.update, {
             sessionId,
-            update: {
-                sessionUpdate: "agent_message_chunk",
-                content: {
-                    type: "text",
-                    text: "*Conversation interrupted*"
-                }
-            }
+            update: createAgentTextMessageChunk("*Conversation interrupted*"),
         });
     }
 
@@ -1674,26 +1670,33 @@ function mergeHistoryUpdates(
         merged.push(update);
     };
 
-    const flushFallbackThrough = (targetKey: string): boolean => {
+    const flushFallbackBeforeMatchingDuplicate = (targetUpdate: UpdateSessionEvent): void => {
+        const targetKey = historyUpdateKey(targetUpdate);
+        const targetContentKey = historyUpdateContentKey(targetUpdate);
+        if (!targetKey && !targetContentKey) {
+            return;
+        }
+
         const matchIndex = responseItemFallbackUpdates.findIndex((update, index) => (
-            index >= fallbackIndex && historyUpdateKey(update) === targetKey
+            index >= fallbackIndex
+            && (
+                (targetKey !== null && historyUpdateKey(update) === targetKey)
+                || (targetContentKey !== null && historyUpdateContentKey(update) === targetContentKey)
+            )
         ));
         if (matchIndex === -1) {
-            return false;
+            return;
         }
 
-        while (fallbackIndex <= matchIndex) {
+        while (fallbackIndex < matchIndex) {
             pushUpdate(responseItemFallbackUpdates[fallbackIndex]!);
             fallbackIndex += 1;
         }
-        return true;
+        fallbackIndex += 1;
     };
 
     for (const update of threadUpdates) {
-        const key = historyUpdateKey(update);
-        if (key && flushFallbackThrough(key)) {
-            continue;
-        }
+        flushFallbackBeforeMatchingDuplicate(update);
         pushUpdate(update);
     }
 
@@ -1710,7 +1713,7 @@ function historyUpdateKey(update: UpdateSessionEvent): string | null {
         case "user_message_chunk":
         case "agent_message_chunk":
         case "agent_thought_chunk":
-            return `${update.sessionUpdate}:${JSON.stringify(update.content)}`;
+            return `${update.sessionUpdate}:${update.messageId ?? ""}:${JSON.stringify(update.content)}`;
         case "tool_call":
             return `tool_call:${update.toolCallId}:start`;
         case "tool_call_update":
@@ -1720,6 +1723,17 @@ function historyUpdateKey(update: UpdateSessionEvent): string | null {
     }
 }
 
+function historyUpdateContentKey(update: UpdateSessionEvent): string | null {
+    switch (update.sessionUpdate) {
+        case "user_message_chunk":
+        case "agent_message_chunk":
+        case "agent_thought_chunk":
+            return `${update.sessionUpdate}:${JSON.stringify(update.content)}`;
+        default:
+            return historyUpdateKey(update);
+    }
+}
+
 function getRequestedMcpServerNames(mcpServers: Array<acp.McpServer>): Array<string> {
     return Array.from(new Set(mcpServers.map(server => sanitizeMcpServerName(server.name))));
 }
diff --git a/src/CodexCommands.ts b/src/CodexCommands.ts
index bd3c81e..57df6e9 100644
--- a/src/CodexCommands.ts
+++ b/src/CodexCommands.ts
@@ -7,6 +7,7 @@ import type {SessionState} from "./CodexAcpServer";
 import type {RateLimitsMap} from "./RateLimitsMap";
 import type {TokenCount} from "./TokenCount";
 import {logger} from "./Logger";
+import {createAgentTextMessageChunk} from "./ContentChunks";
 
 type ParsedSlashCommand = {
     name: string;
@@ -210,20 +211,14 @@ export class CodexCommands {
             case "status": {
                 const session = new ACPSessionConnection(this.connection, sessionId);
                 const message = this.buildStatusMessage(sessionState);
-                await session.update({
-                    sessionUpdate: "agent_message_chunk",
-                    content: { type: "text", text: message }
-                });
+                await session.update(createAgentTextMessageChunk(message));
                 return { handled: true };
             }
             case "logout": {
                 await this.runWithProcessCheck(() => this.codexAcpClient.logout());
                 await this.onLogout();
                 const session = new ACPSessionConnection(this.connection, sessionId);
-                await session.update({
-                    sessionUpdate: "agent_message_chunk",
-                    content: { type: "text", text: "Logged out from Codex account." }
-                });
+                await session.update(createAgentTextMessageChunk("Logged out from Codex account."));
                 return { handled: true };
             }
             case "skills": {
@@ -237,10 +232,7 @@ export class CodexCommands {
                     ? ["Available skills:", ...lines].join("\n")
                     : "No skills configured.";
                 const session = new ACPSessionConnection(this.connection, sessionId);
-                await session.update({
-                    sessionUpdate: "agent_message_chunk",
-                    content: { type: "text", text }
-                });
+                await session.update(createAgentTextMessageChunk(text));
                 return { handled: true };
             }
             case "mcp": {
@@ -258,10 +250,7 @@ export class CodexCommands {
                     ? ["Configured MCP servers:", ...lines].join("\n")
                     : "No MCP servers configured.";
                 const session = new ACPSessionConnection(this.connection, sessionId);
-                await session.update({
-                    sessionUpdate: "agent_message_chunk",
-                    content: { type: "text", text }
-                });
+                await session.update(createAgentTextMessageChunk(text));
                 return { handled: true };
             }
             default:
@@ -316,13 +305,7 @@ export class CodexCommands {
 
         if (argument.length > 4000) {
             const session = new ACPSessionConnection(this.connection, sessionId);
-            await session.update({
-                sessionUpdate: "agent_message_chunk",
-                content: {
-                    type: "text",
-                    text: 'Command "/goal" requires goal text of at most 4000 characters.'
-                }
-            });
+            await session.update(createAgentTextMessageChunk('Command "/goal" requires goal text of at most 4000 characters.'));
             return { handled: true };
         }
 
@@ -371,13 +354,7 @@ export class CodexCommands {
 
     private async sendCommandUsageMessage(name: string, inputHint: string, sessionId: string): Promise<void> {
         const session = new ACPSessionConnection(this.connection, sessionId);
-        await session.update({
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: `Command "/${name}" requires ${inputHint}.`
-            }
-        });
+        await session.update(createAgentTextMessageChunk(`Command "/${name}" requires ${inputHint}.`));
     }
 
     private async sendUnknownCommandMessage(name: string, sessionId: string): Promise<void> {
@@ -390,10 +367,7 @@ export class CodexCommands {
             text.push(...lines);
         }
         const session = new ACPSessionConnection(this.connection, sessionId);
-        await session.update({
-            sessionUpdate: "agent_message_chunk",
-            content: { type: "text", text: text.join("\n") }
-        });
+        await session.update(createAgentTextMessageChunk(text.join("\n")));
     }
 
     private buildStatusMessage(sessionState: SessionState): string {
diff --git a/src/CodexEventHandler.ts b/src/CodexEventHandler.ts
index 4ed0cdb..9f61574 100644
--- a/src/CodexEventHandler.ts
+++ b/src/CodexEventHandler.ts
@@ -55,6 +55,10 @@ import {
 } from "./CodexToolCallMapper";
 import { stripShellPrefix } from "./CommandUtils";
 import {createTerminalOutputMeta, type TerminalOutputMode} from "./TerminalOutputMode";
+import {
+    createAgentTextMessageChunk,
+    createAgentTextThoughtChunk,
+} from "./ContentChunks";
 
 export { stripShellPrefix };
 
@@ -226,44 +230,20 @@ export class CodexEventHandler {
     }
 
     private async createTextEvent(event: AgentMessageDeltaNotification): Promise<UpdateSessionEvent> {
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: event.delta
-            }
-        }
+        return createAgentTextMessageChunk(event.delta, event.itemId);
     }
 
     private async createConfigWarningEvent(event: ConfigWarningNotification): Promise<UpdateSessionEvent> {
         const detailsText = event.details ? `\n\n${event.details}` : "";
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: `Config warning: ${event.summary}${detailsText}\n\n`
-            }
-        }
+        return createAgentTextMessageChunk(`Config warning: ${event.summary}${detailsText}\n\n`);
     }
 
     private createWarningEvent(event: WarningNotification): UpdateSessionEvent {
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: `Warning: ${event.message}\n\n`
-            }
-        };
+        return createAgentTextMessageChunk(`Warning: ${event.message}\n\n`);
     }
 
     private createModelReroutedEvent(event: ModelReroutedNotification): UpdateSessionEvent {
-        return {
-            sessionUpdate: "agent_thought_chunk",
-            content: {
-                type: "text",
-                text: `Model rerouted from ${event.fromModel} to ${event.toModel} (${event.reason}).\n\n`
-            }
-        };
+        return createAgentTextThoughtChunk(`Model rerouted from ${event.fromModel} to ${event.toModel} (${event.reason}).\n\n`);
     }
 
     private createThreadGoalUpdatedEvent(event: ThreadGoalUpdatedNotification): UpdateSessionEvent | null {
@@ -278,13 +258,7 @@ export class CodexEventHandler {
         const text = objective.includes("\n")
             ? `Goal updated (${status}):\n${objective}`
             : `Goal updated (${status}): ${objective}`;
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: `\n\n${text}\n\n`,
-            },
-        };
+        return createAgentTextMessageChunk(`\n\n${text}\n\n`);
     }
 
     private formatThreadGoalStatus(status: ThreadGoalUpdatedNotification["goal"]["status"]): string {
@@ -310,13 +284,7 @@ export class CodexEventHandler {
         }
         this.sessionState.currentGoal = null;
 
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: "\n\nGoal cleared.\n\n",
-            },
-        };
+        return createAgentTextMessageChunk("\n\nGoal cleared.\n\n");
     }
 
     private createThreadGoalSnapshot(event: ThreadGoalUpdatedNotification): ThreadGoalSnapshot {
@@ -342,22 +310,16 @@ export class CodexEventHandler {
         event: ReasoningSummaryTextDeltaNotification | ReasoningTextDeltaNotification
     ): UpdateSessionEvent {
         this.seenReasoningDeltaItemIds.add(event.itemId);
-        return this.createAgentThoughtEvent(event.delta);
+        return this.createAgentThoughtEvent(event.delta, event.itemId);
     }
 
     private createReasoningSectionBreakEvent(event: ReasoningSummaryPartAddedNotification): UpdateSessionEvent {
         this.seenReasoningDeltaItemIds.add(event.itemId);
-        return this.createAgentThoughtEvent("\n\n");
+        return this.createAgentThoughtEvent("\n\n", event.itemId);
     }
 
-    private createAgentThoughtEvent(text: string): UpdateSessionEvent {
-        return {
-            sessionUpdate: "agent_thought_chunk",
-            content: {
-                type: "text",
-                text,
-            }
-        };
+    private createAgentThoughtEvent(text: string, messageId: string): UpdateSessionEvent {
+        return createAgentTextThoughtChunk(text, messageId);
     }
 
     private async createItemEvent(event: ItemStartedNotification): Promise<UpdateSessionEvent | null> {
@@ -462,7 +424,7 @@ export class CodexEventHandler {
         if (text.length === 0) {
             return null;
         }
-        return this.createAgentThoughtEvent(text);
+        return this.createAgentThoughtEvent(text, item.id);
     }
 
     private createExitedReviewModeEvent(item: ThreadItem & { type: "exitedReviewMode" }): UpdateSessionEvent | null {
@@ -470,23 +432,11 @@ export class CodexEventHandler {
         if (text.length === 0) {
             return null;
         }
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text,
-            }
-        };
+        return createAgentTextMessageChunk(text);
     }
 
     private createContextCompactedEvent(): UpdateSessionEvent {
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: "*Context compacted to fit the model's context window.*\n\n"
-            }
-        };
+        return createAgentTextMessageChunk("*Context compacted to fit the model's context window.*\n\n");
     }
 
     private createCommandOutputDeltaEvent(event: CommandExecutionOutputDeltaNotification): UpdateSessionEvent {
@@ -629,13 +579,7 @@ export class CodexEventHandler {
                 ? RequestError.internalError(this.createTurnErrorData(params.error))
                 : RequestError.authRequired(this.createTurnErrorData(params.error), params.error.message);
         }
-        return {
-            sessionUpdate: "agent_message_chunk",
-            content: {
-                type: "text",
-                text: `${params.error.message}\n\n`
-            }
-        }
+        return createAgentTextMessageChunk(`${params.error.message}\n\n`);
     }
 
     private isAuthenticationRequiredError(error: CodexErrorInfo | null): boolean {
diff --git a/src/ContentChunks.ts b/src/ContentChunks.ts
new file mode 100644
index 0000000..b111d34
--- /dev/null
+++ b/src/ContentChunks.ts
@@ -0,0 +1,52 @@
+import type {ContentBlock} from "@agentclientprotocol/sdk";
+import type {UpdateSessionEvent} from "./ACPSessionConnection";
+
+export function createUserMessageChunk(content: ContentBlock, messageId?: string): UpdateSessionEvent {
+    if (messageId) {
+        return {
+            sessionUpdate: "user_message_chunk",
+            messageId,
+            content,
+        };
+    }
+    return {
+        sessionUpdate: "user_message_chunk",
+        content,
+    };
+}
+
+export function createAgentMessageChunk(content: ContentBlock, messageId?: string): UpdateSessionEvent {
+    if (messageId) {
+        return {
+            sessionUpdate: "agent_message_chunk",
+            messageId,
+            content,
+        };
+    }
+    return {
+        sessionUpdate: "agent_message_chunk",
+        content,
+    };
+}
+
+export function createAgentThoughtChunk(content: ContentBlock, messageId?: string): UpdateSessionEvent {
+    if (messageId) {
+        return {
+            sessionUpdate: "agent_thought_chunk",
+            messageId,
+            content,
+        };
+    }
+    return {
+        sessionUpdate: "agent_thought_chunk",
+        content,
+    };
+}
+
+export function createAgentTextMessageChunk(text: string, messageId?: string): UpdateSessionEvent {
+    return createAgentMessageChunk({type: "text", text}, messageId);
+}
+
+export function createAgentTextThoughtChunk(text: string, messageId?: string): UpdateSessionEvent {
+    return createAgentThoughtChunk({type: "text", text}, messageId);
+}
diff --git a/src/ResponseItemHistoryFallback.ts b/src/ResponseItemHistoryFallback.ts
index 2591c6a..11e49d6 100644
--- a/src/ResponseItemHistoryFallback.ts
+++ b/src/ResponseItemHistoryFallback.ts
@@ -27,7 +27,7 @@ function historyFallbackUpdateKey(update: UpdateSessionEvent): string | null {
         case "user_message_chunk":
         case "agent_message_chunk":
         case "agent_thought_chunk":
-            return `${update.sessionUpdate}:${JSON.stringify(update.content)}`;
+            return `${update.sessionUpdate}:${update.messageId ?? ""}:${JSON.stringify(update.content)}`;
         case "tool_call":
             return `tool_call:${update.toolCallId}:start`;
         case "tool_call_update":
diff --git a/src/__tests__/CodexACPAgent/data/follow-up-no-duplicates.json b/src/__tests__/CodexACPAgent/data/follow-up-no-duplicates.json
index efd040d..d992b60 100644
--- a/src/__tests__/CodexACPAgent/data/follow-up-no-duplicates.json
+++ b/src/__tests__/CodexACPAgent/data/follow-up-no-duplicates.json
@@ -5,6 +5,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "He"
@@ -20,6 +21,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "ll"
@@ -35,6 +37,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "o!"
diff --git a/src/__tests__/CodexACPAgent/data/load-session-history.json b/src/__tests__/CodexACPAgent/data/load-session-history.json
index bb272cf..454bcf7 100644
--- a/src/__tests__/CodexACPAgent/data/load-session-history.json
+++ b/src/__tests__/CodexACPAgent/data/load-session-history.json
@@ -71,6 +71,7 @@
       "sessionId": "session-1",
       "update": {
         "sessionUpdate": "user_message_chunk",
+        "messageId": "item-user-1",
         "content": {
           "type": "text",
           "text": "Hi"
@@ -86,6 +87,7 @@
       "sessionId": "session-1",
       "update": {
         "sessionUpdate": "user_message_chunk",
+        "messageId": "item-user-1",
         "content": {
           "type": "text",
           "text": "[@image](https://example.com/image.png)"
@@ -101,6 +103,7 @@
       "sessionId": "session-1",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "item-agent-1",
         "content": {
           "type": "text",
           "text": "Hello!"
@@ -116,6 +119,7 @@
       "sessionId": "session-1",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "item-reason-1",
         "content": {
           "type": "text",
           "text": "Thinking..."
diff --git a/src/__tests__/CodexACPAgent/data/load-session-response-item-history-fallback.json b/src/__tests__/CodexACPAgent/data/load-session-response-item-history-fallback.json
index c5d03f9..3fd4f91 100644
--- a/src/__tests__/CodexACPAgent/data/load-session-response-item-history-fallback.json
+++ b/src/__tests__/CodexACPAgent/data/load-session-response-item-history-fallback.json
@@ -71,6 +71,7 @@
       "sessionId": "session-legacy",
       "update": {
         "sessionUpdate": "user_message_chunk",
+        "messageId": "item-user-1",
         "content": {
           "type": "text",
           "text": "List the files"
@@ -86,6 +87,7 @@
       "sessionId": "session-legacy",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "item-reasoning-1",
         "content": {
           "type": "text",
           "text": "Need to inspect the directory."
@@ -245,6 +247,7 @@
       "sessionId": "session-legacy",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "item-agent-1",
         "content": {
           "type": "text",
           "text": "The directory contains README.md and src."
diff --git a/src/__tests__/CodexACPAgent/data/multiple-sessions.json b/src/__tests__/CodexACPAgent/data/multiple-sessions.json
index 895ec17..4c88430 100644
--- a/src/__tests__/CodexACPAgent/data/multiple-sessions.json
+++ b/src/__tests__/CodexACPAgent/data/multiple-sessions.json
@@ -5,6 +5,7 @@
       "sessionId": "session-1",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "Hello-1"
@@ -20,6 +21,7 @@
       "sessionId": "session-2",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "Hello-2"
diff --git a/src/__tests__/CodexACPAgent/data/output-acp-events.json b/src/__tests__/CodexACPAgent/data/output-acp-events.json
index efd040d..d992b60 100644
--- a/src/__tests__/CodexACPAgent/data/output-acp-events.json
+++ b/src/__tests__/CodexACPAgent/data/output-acp-events.json
@@ -5,6 +5,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "He"
@@ -20,6 +21,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "ll"
@@ -35,6 +37,7 @@
       "sessionId": "id",
       "update": {
         "sessionUpdate": "agent_message_chunk",
+        "messageId": "string",
         "content": {
           "type": "text",
           "text": "o!"
diff --git a/src/__tests__/CodexACPAgent/data/reasoning-completed-parts.json b/src/__tests__/CodexACPAgent/data/reasoning-completed-parts.json
index 1a8241e..0f8d7b4 100644
--- a/src/__tests__/CodexACPAgent/data/reasoning-completed-parts.json
+++ b/src/__tests__/CodexACPAgent/data/reasoning-completed-parts.json
@@ -5,6 +5,7 @@
       "sessionId": "test-session-id",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "reasoning-2",
         "content": {
           "type": "text",
           "text": "First summary\n\nSecond summary"
diff --git a/src/__tests__/CodexACPAgent/data/reasoning-deltas-and-section-break.json b/src/__tests__/CodexACPAgent/data/reasoning-deltas-and-section-break.json
index 43ff845..894bff9 100644
--- a/src/__tests__/CodexACPAgent/data/reasoning-deltas-and-section-break.json
+++ b/src/__tests__/CodexACPAgent/data/reasoning-deltas-and-section-break.json
@@ -5,6 +5,7 @@
       "sessionId": "test-session-id",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "reasoning-1",
         "content": {
           "type": "text",
           "text": "First thought"
@@ -20,6 +21,7 @@
       "sessionId": "test-session-id",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "reasoning-1",
         "content": {
           "type": "text",
           "text": "\n\n"
@@ -35,6 +37,7 @@
       "sessionId": "test-session-id",
       "update": {
         "sessionUpdate": "agent_thought_chunk",
+        "messageId": "reasoning-1",
         "content": {
           "type": "text",
           "text": "Raw reasoning detail"