Daemon: scope relaxed systemd probes to install flows

src/commands/configure.daemon.test.ts

@@ -123,6 +123,21 @@ describe("maybeInstallDaemon", () => {
     expect(serviceInstall).toHaveBeenCalledTimes(1);
   });
 
+  it("rethrows install probe failures that are not the known non-fatal Linux systemd cases", async () => {
+    serviceIsLoaded.mockRejectedValueOnce(
+      new Error("systemctl is-enabled unavailable: read-only file system"),
+    );
+
+    await expect(
+      maybeInstallDaemon({
+        runtime: { log: vi.fn(), error: vi.fn(), exit: vi.fn() },
+        port: 18789,
+      }),
+    ).rejects.toThrow("systemctl is-enabled unavailable: read-only file system");
+
+    expect(serviceInstall).not.toHaveBeenCalled();
+  });
+
   it("continues the WSL2 daemon install flow when service status probe reports systemd unavailability", async () => {
     serviceIsLoaded.mockRejectedValueOnce(
       new Error("systemctl --user unavailable: Failed to connect to bus: No medium found"),

src/commands/configure.daemon.ts

@@ -1,6 +1,7 @@
 import { withProgress } from "../cli/progress.js";
 import { loadConfig } from "../config/config.js";
 import { resolveGatewayService } from "../daemon/service.js";
+import { isNonFatalSystemdInstallProbeError } from "../daemon/systemd.js";
 import type { RuntimeEnv } from "../runtime.js";
 import { note } from "../terminal/note.js";
 import { confirm, select } from "./configure.shared.js";
@@ -23,7 +24,10 @@ export async function maybeInstallDaemon(params: {
   let loaded = false;
   try {
     loaded = await service.isLoaded({ env: process.env });
-  } catch {
+  } catch (error) {
+    if (!isNonFatalSystemdInstallProbeError(error)) {
+      throw error;
+    }
     loaded = false;
   }
   let shouldCheckLinger = false;