feat(server): make idle agent release configurable

apps/mobile/src/features/settings/SettingsServerControlsRouteScreen.test.tsx

@@ -95,7 +95,21 @@ vi.mock("./components/SettingsEnvironmentFilterHeader", () => ({
 }));
 vi.mock("./components/DatabaseStorageNotice", () => ({ DatabaseStorageNotice: () => null }));
 vi.mock("./components/SettingsSection", () => ({ SettingsSection: Children }));
-vi.mock("../../components/ui/ListChoiceRow", () => ({ ListChoiceRow: () => null }));
+vi.mock("../../components/ui/ListChoiceRow", () => ({
+  ListChoiceRow: ({
+    label,
+    disabled,
+    onPress,
+  }: {
+    label: string;
+    disabled?: boolean;
+    onPress: () => void;
+  }) => (
+    <button disabled={disabled} onClick={onPress}>
+      {label}
+    </button>
+  ),
+}));
 vi.mock("./components/SettingsSwitchRow", () => ({
   SettingsSwitchRow: ({
     label,
@@ -158,7 +172,11 @@ function environment(environmentId: string, label: string) {
         sidebarAutoSettleOnMerge: false,
       },
       environment: {
-        capabilities: { projectSettingsOverrides: true, threadAutoSettlement: true },
+        capabilities: {
+          projectSettingsOverrides: true,
+          threadAutoSettlement: true,
+          providerSessionIdleTimeout: true,
+        },
       },
     },
   };
@@ -222,6 +240,25 @@ describe("SettingsServerControlsRouteScreen", () => {
     await act(async () => pending.resolve(AsyncResult.success(undefined)));
   });
 
+  it.each([false, true])(
+    "does not send idle timeout changes to an excluded target with idle capability %s",
+    async (idleCapability) => {
+      const remote = environment("remote", "Remote");
+      remote.connection.phase = "disconnected";
+      remote.serverConfig.environment.capabilities.providerSessionIdleTimeout = idleCapability;
+      mocks.targets = [environment("local", "Local"), remote];
+      act(() => root.render(<SettingsThreadsRouteScreen />));
+      const preset = [...container.querySelectorAll<HTMLButtonElement>("button")].find(
+        (button) => button.textContent === "5 minutes",
+      )!;
+      expect(preset).toBeDefined();
+      await act(async () => preset.click());
+      expect(mocks.updateSettings.mock.calls).toEqual([
+        [{ environmentId: "local", input: { patch: { providerSessionIdleTimeoutMinutes: 5 } } }],
+      ]);
+    },
+  );
+
   it("disables auto-settle when a selected environment cannot save settings", () => {
     const remote = environment("remote", "Remote");
     // Auto-settle rows skip a server without auto-settlement, but the page still saves to it.

apps/mobile/src/features/settings/SettingsServerControlsRouteScreen.tsx

@@ -149,7 +149,9 @@ function planServerSettingsWrites(
   const capable = targets.filter((target) => supportsSharedSettingsSync(target.environment));
   const others = targets.filter((target) => !supportsSharedSettingsSync(target.environment));
   const othersPatch = Object.fromEntries(
-    Object.entries(patch).filter(([key]) => !AUTO_SETTLE_SETTING_KEYS.has(key)),
+    Object.entries(patch).filter(
+      ([key]) => !AUTO_SETTLE_SETTING_KEYS.has(key) && key !== "providerSessionIdleTimeoutMinutes",
+    ),
   ) as ServerSettingsPatch;
   return [
     ...planMobileScopedSettingsPatch(capable, projectSelected, patch),

apps/mobile/src/features/settings/ThreadSettingsSections.tsx

@@ -13,14 +13,15 @@ import type { ComponentProps } from "react";
 import { View } from "react-native";
 import { useSafeAreaInsets } from "react-native-safe-area-context";
 
-import { DEFAULT_SERVER_SETTINGS } from "@t3tools/contracts";
+import { DEFAULT_SERVER_SETTINGS, PROVIDER_SESSION_IDLE_TIMEOUT_PRESETS } from "@t3tools/contracts";
 import { supportsSharedSettingsSync } from "@t3tools/client-runtime/state/shared-settings";
 import { AppText as Text } from "../../components/ui/AppText";
 import { useEnvironments } from "../../state/environments";
 import { mobilePreferencesAtom, updateMobilePreferencesAtom } from "../../state/preferences";
 import { serverEnvironment } from "../../state/server";
 import { useAtomCommand } from "../../state/use-atom-command";
 import { SettingsSection } from "./components/SettingsSection";
+import { ListChoiceRow } from "../../components/ui/ListChoiceRow";
 import { SettingsSwitchRow } from "./components/SettingsSwitchRow";
 import { SettingsScreen } from "./components/SettingsScreen";
 import { planAutoSettleSettingsSync, type AutoSettleSettings } from "./autoSettleSettingsSync";
@@ -101,6 +102,7 @@ export function AutoSettleSettingsRows(props: {
     patch: Partial<AutoSettleSettings> & {
       autoResumeLimitedThreads?: boolean;
       snoozeLimitedThreads?: boolean;
+      providerSessionIdleTimeoutMinutes?: number | null;
     },
   ) => props.write(patch);
 
@@ -145,6 +147,31 @@ export function AutoSettleSettingsRows(props: {
           />
         </SettingsSection>
       ) : null}
+      {!projectSelected &&
+      displayTargets.every(
+        (target) =>
+          target.environment.serverConfig.environment.capabilities.providerSessionIdleTimeout ===
+          true,
+      ) ? (
+        <SettingsSection title="Release idle agents">
+          <Text className="px-4 text-sm text-foreground-muted">
+            Free memory while idle. Conversations resume when you send a message. Active turns and
+            background work delay release.
+          </Text>
+          {PROVIDER_SESSION_IDLE_TIMEOUT_PRESETS.map((option, index) => (
+            <ListChoiceRow
+              key={option.value ?? "never"}
+              label={option.label}
+              separated={index > 0}
+              disabled={disabled}
+              selected={displayTargets.every(
+                (target) => target.settings.providerSessionIdleTimeoutMinutes === option.value,
+              )}
+              onPress={() => writeToAll({ providerSessionIdleTimeoutMinutes: option.value })}
+            />
+          ))}
+        </SettingsSection>
+      ) : null}
       <SettingsSection title="Auto-settle">
         <SettingsSwitchRow
           icon="arrow.triangle.branch"

apps/server/src/environment/ServerEnvironment.ts

@@ -233,6 +233,7 @@ export const make = Effect.gen(function* () {
       requiredWorktreeBootstrap: true,
       threadSettlement: true,
       threadAutoSettlement: true,
+      providerSessionIdleTimeout: true,
       storageCleanup: true,
       storageCleanupRun: true,
       databaseStorage: true,