Daemon: scope relaxed systemd probes to install flows

src/cli/daemon-cli/install.test.ts

@@ -256,4 +256,27 @@ describe("runDaemonInstall", () => {
     expect(installDaemonServiceAndEmitMock).toHaveBeenCalledTimes(1);
     expect(actionState.warnings.some((warning) => warning.includes("Auto-generated"))).toBe(true);
   });
+
+  it("continues Linux install when service probe hits a non-fatal systemd bus failure", async () => {
+    service.isLoaded.mockRejectedValueOnce(
+      new Error("systemctl is-enabled unavailable: Failed to connect to bus"),
+    );
+
+    await runDaemonInstall({ json: true });
+
+    expect(actionState.failed).toEqual([]);
+    expect(installDaemonServiceAndEmitMock).toHaveBeenCalledTimes(1);
+  });
+
+  it("fails install when service probe reports an unrelated error", async () => {
+    service.isLoaded.mockRejectedValueOnce(
+      new Error("systemctl is-enabled unavailable: read-only file system"),
+    );
+
+    await runDaemonInstall({ json: true });
+
+    expect(actionState.failed[0]?.message).toContain("Gateway service check failed");
+    expect(actionState.failed[0]?.message).toContain("read-only file system");
+    expect(installDaemonServiceAndEmitMock).not.toHaveBeenCalled();
+  });
 });

src/cli/daemon-cli/install.ts

@@ -7,6 +7,7 @@ import { resolveGatewayInstallToken } from "../../commands/gateway-install-token
 import { loadConfig, resolveGatewayPort } from "../../config/config.js";
 import { resolveIsNixMode } from "../../config/paths.js";
 import { resolveGatewayService } from "../../daemon/service.js";
+import { isNonFatalSystemdInstallProbeError } from "../../daemon/systemd.js";
 import { defaultRuntime } from "../../runtime.js";
 import { formatCliCommand } from "../command-format.js";
 import {
@@ -48,8 +49,12 @@ export async function runDaemonInstall(opts: DaemonInstallOptions) {
   try {
     loaded = await service.isLoaded({ env: process.env });
   } catch (err) {
-    fail(`Gateway service check failed: ${String(err)}`);
-    return;
+    if (isNonFatalSystemdInstallProbeError(err)) {
+      loaded = false;
+    } else {
+      fail(`Gateway service check failed: ${String(err)}`);
+      return;
+    }
   }
   if (loaded) {
     if (!opts.force) {