fix: archive session behavior

src/auto-reply/reply/session.ts

@@ -442,7 +442,7 @@ export async function initSessionState(params: {
     archivedAt: baseEntry?.archivedAt,
   };
   if (typeof sessionEntry.archivedAt === "number") {
-    delete sessionEntry.archivedAt;
+    sessionEntry.archivedAt = null;
   }
   const metaPatch = deriveSessionMetaPatch({
     ctx: sessionCtxForState,

src/gateway/server-methods/sessions.ts

@@ -217,14 +217,16 @@ export const sessionsHandlers: GatewayRequestHandlers = {
     const wasArchived = typeof applied.previous?.archivedAt === "number";
     const isArchived = typeof applied.entry.archivedAt === "number";
     if (!wasArchived && isArchived) {
-      void writeSessionArchiveSummary({
-        cfg,
-        key: target.canonicalKey ?? key,
-        entry: applied.entry,
-        storePath,
-        archivedAt: applied.entry.archivedAt ?? undefined,
-      }).catch((err) => {
-        console.warn(`sessions.patch archive summary failed: ${String(err)}`);
+      setImmediate(() => {
+        void writeSessionArchiveSummary({
+          cfg,
+          key: target.canonicalKey ?? key,
+          entry: applied.entry,
+          storePath,
+          archivedAt: applied.entry.archivedAt ?? undefined,
+        }).catch((err) => {
+          console.warn(`sessions.patch archive summary failed: ${String(err)}`);
+        });
       });
     }
 

src/gateway/sessions-resolve.ts

@@ -75,6 +75,7 @@ export async function resolveSessionKeyFromResolveParams(params: {
       opts: {
         includeGlobal: p.includeGlobal === true,
         includeUnknown: p.includeUnknown === true,
+        includeArchived: true,
         spawnedBy: p.spawnedBy,
         agentId: p.agentId,
         search: sessionId,
@@ -119,6 +120,7 @@ export async function resolveSessionKeyFromResolveParams(params: {
     opts: {
       includeGlobal: p.includeGlobal === true,
       includeUnknown: p.includeUnknown === true,
+      includeArchived: true,
       label: parsedLabel.label,
       agentId: p.agentId,
       spawnedBy: p.spawnedBy,