fix(workbench): persist user message through event projection (#2045)

internal/cloud/workbench-projection-writer.ts

@@ -144,6 +144,7 @@ export async function writeWorkbenchProjectionEvent({ runtimeStore = null, event
   const previousFinalText = finalResponseTextValue(previousCheckpoint?.finalResponse, previousCheckpoint?.assistantText, previousCheckpoint?.finalText);
   const messageFinalText = finalResponseTextValue(event.finalResponse, event.assistantText, event.reply, previousFinalText);
   const checkpointFinalResponse = messageFinalText ? { text: messageFinalText, status, traceId, valuesPrinted: false } : null;
+  const userMessageFact = sessionId && !suppressedAfterSeal && previousCheckpoint?.userMessage ? normalizeMessageFact(previousCheckpoint.userMessage, 0, { traceId, sessionId, turnId, terminal: false, terminalStatus: "sent", finalText: null, timestamp: projectedAt, timing }) : null;
   const messageFact = sessionId && !suppressedAfterSeal ? normalizeMessageFact({
     messageId: eventProjectionAssistantMessageId(traceId, event),
     role: "agent",
@@ -164,7 +165,7 @@ export async function writeWorkbenchProjectionEvent({ runtimeStore = null, event
     createdAt: occurredAt,
     updatedAt: projectedAt,
     source: "workbench-event-projection"
-  }, 0, { traceId, sessionId, turnId, terminal, terminalStatus: status, finalText: messageFinalText, timestamp: projectedAt, timing }) : null;
+  }, userMessageFact ? 1 : 0, { traceId, sessionId, turnId, terminal, terminalStatus: status, finalText: messageFinalText, timestamp: projectedAt, timing }) : null;
   const facts = {
     sessions: sessionId && !suppressedAfterSeal ? [{
       sessionId,
@@ -204,7 +205,7 @@ export async function writeWorkbenchProjectionEvent({ runtimeStore = null, event
       occurredAt,
       updatedAt: projectedAt
     }],
-    messages: messageFact ? [messageFact] : [],
+    messages: [userMessageFact, messageFact].filter(Boolean),
     checkpoints: !suppressedAfterSeal ? [{
       traceId,
       sessionId,
@@ -363,6 +364,7 @@ function buildWorkbenchProjectionFacts({ traceId = null, ownerUserId = null, own
       diagnostic,
       finalResponse: checkpointFinalResponse,
       assistantText: messageFinalText,
+      userMessage: previousCheckpoint?.userMessage ?? null,
       timing,
       startedAt: timing.startedAt,
       lastEventAt: timing.lastEventAt,
@@ -386,6 +388,7 @@ function buildWorkbenchProjectionFacts({ traceId = null, ownerUserId = null, own
       diagnostic,
       finalResponse: projectedFinalResponse,
       assistantText: finalText,
+      userMessage: messages.find((message) => message.role === "user") ?? null,
       timing,
       startedAt: timing.startedAt,
       lastEventAt: timing.lastEventAt,
@@ -401,24 +404,11 @@ function workbenchProjectionInputMessages({ session = {}, payload = {}, params =
   if (Array.isArray(payload?.messages) && payload.messages.length > 0) return payload.messages;
   if (!traceId) return [];
   const turnId = textValue(payload?.turnId) || traceId;
-  const userText = textValue(params?.message ?? params?.prompt ?? payload?.prompt ?? payload?.message);
-  const userMessageId = textValue(payload?.userMessageId ?? payload?.userMessage?.messageId) || stableFactId("msg", { traceId, role: "user" });
   const assistantMessageId = textValue(payload?.assistantMessageId ?? payload?.messageId ?? payload?.assistantMessage?.messageId) || stableFactId("msg", { traceId, role: "agent" });
   const createdAt = timestampValue(timestamp ?? payload?.createdAt ?? payload?.updatedAt);
   const messages = [];
-  if (userText) {
+  const userMessage = workbenchProjectionUserMessage({ payload, params, traceId, turnId, timestamp: createdAt });
-    messages.push({
+  if (userMessage) messages.push(userMessage);
-      messageId: userMessageId,
-      role: "user",
-      status: "sent",
-      text: userText,
-      traceId,
-      turnId,
-      createdAt,
-      updatedAt: createdAt,
-      valuesPrinted: false
-    });
-  }
   messages.push({
     messageId: assistantMessageId,
     role: "agent",
@@ -438,6 +428,23 @@ function workbenchProjectionInputMessages({ session = {}, payload = {}, params =
   return messages;
 }
 
+function workbenchProjectionUserMessage({ payload = {}, params = {}, traceId = null, turnId = null, timestamp = null } = {}) {
+  const userText = textValue(params?.message ?? params?.prompt ?? payload?.prompt ?? payload?.message);
+  if (!traceId || !userText) return null;
+  const createdAt = timestampValue(timestamp ?? payload?.createdAt ?? payload?.updatedAt);
+  return {
+    messageId: textValue(payload?.userMessageId ?? payload?.userMessage?.messageId) || stableFactId("msg", { traceId, role: "user" }),
+    role: "user",
+    status: "sent",
+    text: userText,
+    traceId,
+    turnId: textValue(turnId) || traceId,
+    createdAt,
+    updatedAt: createdAt,
+    valuesPrinted: false
+  };
+}
+
 function normalizeMessages(messages, context) {
   const normalized = Array.isArray(messages) ? messages.map((message, index) => normalizeMessageFact(message, index, context)).filter(Boolean) : [];
   if (context?.terminal && context?.finalText && context?.traceId && !normalized.some((message) => message.role !== "user" && message.traceId === context.traceId)) {