fix(memory): bound session export timestamps

packages/memory-host-sdk/src/host/session-files.test.ts

@@ -295,4 +295,22 @@ describe("buildSessionEntry", () => {
     expect(entry.content).toBe("Assistant: User-facing summary.\nUser: Actual user follow-up.");
     expect(entry.lineMap).toStrictEqual([2, 3]);
   });
+
+  it("drops Date-invalid numeric message timestamps", async () => {
+    const jsonlLines = [
+      JSON.stringify({
+        type: "message",
+        message: {
+          role: "user",
+          content: "Hello",
+          timestamp: 8_640_000_000_000_001,
+        },
+      }),
+    ];
+    const filePath = path.join(tmpDir, "invalid-timestamp-session.jsonl");
+    fsSync.writeFileSync(filePath, jsonlLines.join("\n"));
+
+    const entry = requireSessionEntry(await buildSessionEntry(filePath));
+    expect(entry.messageTimestampsMs).toStrictEqual([0]);
+  });
 });

packages/memory-host-sdk/src/host/session-files.ts

@@ -28,6 +28,7 @@ const DREAMING_NARRATIVE_RUN_PREFIX = "dreaming-narrative-";
 // This limit applies to content only; the role label adds up to 11 chars.
 const SESSION_EXPORT_CONTENT_WRAP_CHARS = 800;
 const SESSION_ENTRY_PARSE_YIELD_LINES = 250;
+const MAX_DATE_TIMESTAMP_MS = 8_640_000_000_000_000;
 const DIRECT_CRON_PROMPT_RE = /^\[cron:[^\]]+\]\s*/;
 
 export type SessionFileEntry = {
@@ -509,7 +510,7 @@ function parseSessionTimestampMs(
   for (const value of candidates) {
     if (typeof value === "number" && Number.isFinite(value)) {
       const ms = value > 0 && value < 1e11 ? value * 1000 : value;
-      if (Number.isFinite(ms) && ms > 0) {
+      if (Number.isFinite(ms) && ms > 0 && ms <= MAX_DATE_TIMESTAMP_MS) {
         return ms;
       }
     }