Improve startup provider snapshots and dev harness

packages/app/src/components/agent-list.tsx

@@ -21,6 +21,7 @@ import { getProviderIcon } from "@/components/provider-icons";
 import { buildHostAgentDetailRoute } from "@/utils/host-routes";
 import { resolveWorkspaceIdByExecutionDirectory } from "@/utils/workspace-execution";
 import { prepareWorkspaceTab } from "@/utils/workspace-navigation";
+import type { Agent } from "@/stores/session-store";
 
 interface AgentListProps {
   agents: AggregatedAgent[];
@@ -37,6 +38,62 @@ type FlatListItem =
   | { type: "header"; key: string; title: string }
   | { type: "agent"; key: string; agent: AggregatedAgent };
 
+function buildHistoricalAgentDetail(agent: AggregatedAgent): Agent {
+  return {
+    serverId: agent.serverId,
+    id: agent.id,
+    provider: agent.provider,
+    status: agent.status,
+    createdAt: agent.createdAt,
+    updatedAt: agent.lastActivityAt,
+    lastUserMessageAt: null,
+    lastActivityAt: agent.lastActivityAt,
+    capabilities: {
+      supportsStreaming: false,
+      supportsSessionPersistence: false,
+      supportsDynamicModes: false,
+      supportsMcpServers: false,
+      supportsReasoningStream: false,
+      supportsToolInvocations: false,
+    },
+    currentModeId: null,
+    availableModes: [],
+    pendingPermissions: [],
+    persistence: null,
+    runtimeInfo: {
+      provider: agent.provider,
+      sessionId: null,
+    },
+    title: agent.title,
+    cwd: agent.cwd,
+    model: null,
+    thinkingOptionId: null,
+    requiresAttention: agent.requiresAttention,
+    attentionReason: agent.attentionReason,
+    attentionTimestamp: agent.attentionTimestamp,
+    archivedAt: agent.archivedAt,
+    labels: agent.labels,
+  };
+}
+
+function rememberArchivedAgentDetail(agent: AggregatedAgent) {
+  if (!agent.archivedAt) {
+    return;
+  }
+
+  useSessionStore.getState().setAgentDetails(agent.serverId, (previous) => {
+    const existing = previous.get(agent.id);
+    const next = new Map(previous);
+    next.set(agent.id, {
+      ...buildHistoricalAgentDetail(agent),
+      ...existing,
+      archivedAt: existing?.archivedAt ?? agent.archivedAt,
+      cwd: existing?.cwd ?? agent.cwd,
+    });
+    return next;
+  });
+}
+
 function deriveDateSectionLabel(lastActivityAt: Date): string {
   const now = new Date();
   const todayStart = new Date(now.getFullYear(), now.getMonth(), now.getDate());
@@ -251,6 +308,7 @@ export function AgentList({
         return;
       }
 
+      rememberArchivedAgentDetail(agent);
       const route = prepareWorkspaceTab({
         serverId,
         workspaceId,

packages/app/src/components/agent-status-bar.tsx

@@ -878,7 +878,7 @@ export const AgentStatusBar = memo(function AgentStatusBar({
     entries: snapshotEntries,
     isLoading: snapshotIsLoading,
     refetchIfStale: refetchSnapshotIfStale,
-  } = useProvidersSnapshot(serverId, agent?.cwd);
+  } = useProvidersSnapshot(serverId);
 
   const snapshotSelectedEntry = useMemo(() => {
     if (!snapshotEntries || !agent?.provider) {