[WRONG BRANCH] fix(windows): remove native WinSW service during fresh scheduler install

src/service.ts

@@ -1978,8 +1978,7 @@ export async function registerFreshWindowsSchedulerTask(
   }
 }
 
-function installWindows(): void {
-  recordOwnedConfigPath(getConfigDir(), serviceStatePath());
+function removeNativeWindowsServiceForScheduler(): void {
   // Transactional backend switch: installing the scheduler backend removes a native
   // service first — two live managers would both respawn the proxy (conflict).
   if (statusWinswRaw() !== "nonexistent") {
@@ -1993,6 +1992,11 @@ function installWindows(): void {
       throw new Error(`Native service registration could not be re-verified after the removal attempt — aborting switch. Check 'sc.exe query ${WINSW_SERVICE_ID}' and remove it manually if present.`);
     }
   }
+}
+
+function installWindows(): void {
+  recordOwnedConfigPath(getConfigDir(), serviceStatePath());
+  removeNativeWindowsServiceForScheduler();
   // End a running task BEFORE rewriting the assets it is executing — cmd.exe reading the
   // script mid-rewrite runs a torn batch file, and its open handle can fail the write.
   try { stopWindows(); } catch { /* not running */ }
@@ -2596,6 +2600,7 @@ export interface FreshWindowsSchedulerInstallDeps {
   stageRegistrationXml?: (attemptNonce: string) => string;
   register?: (xmlPath: string, attemptNonce: string) => Promise<void>;
   prepare?: () => Promise<void>;
+  removeNativeService?: () => void;
   publishAssets?: () => void;
   runTask?: () => void;
   writeState?: () => void;
@@ -2617,6 +2622,7 @@ export async function installFreshWindowsSchedulerSafely(
   const stage = deps.stageRegistrationXml ?? stageWindowsSchedulerRegistrationXml;
   const register = deps.register ?? registerFreshWindowsSchedulerTask;
   const prepare = deps.prepare ?? (() => prepareServiceInstall("scheduler"));
+  const removeNativeService = deps.removeNativeService ?? removeNativeWindowsServiceForScheduler;
   const publishAssets = deps.publishAssets ?? writeWindowsSchedulerAssets;
   const runTask = deps.runTask ?? startWindows;
   const writeState = deps.writeState ?? (() => writeServiceInstallState("scheduler"));
@@ -2638,6 +2644,7 @@ export async function installFreshWindowsSchedulerSafely(
 
     // The destructive boundary begins only after Task Scheduler accepted the definition.
     await prepare();
+    removeNativeService();
     publishAssets();
     runTask();
     started = true;

tests/service.test.ts

@@ -800,6 +800,7 @@ describe("service lifecycle cleanup ordering", () => {
         calls.push(`register:${path}`);
       },
       prepare: async () => { calls.push("prepare:stop-managers-and-proxy"); },
+      removeNativeService: () => { calls.push("remove-native-service"); },
       publishAssets: () => { calls.push("publish-assets"); },
       runTask: () => { calls.push("run-task"); },
       writeState: () => { calls.push("write-state"); },
@@ -811,6 +812,7 @@ describe("service lifecycle cleanup ordering", () => {
       "stage",
       "register:attempt.xml",
       "prepare:stop-managers-and-proxy",
+      "remove-native-service",
       "publish-assets",
       "run-task",
       "write-state",
@@ -832,6 +834,7 @@ describe("service lifecycle cleanup ordering", () => {
         throw new Error("UAC prompt was cancelled");
       },
       prepare: async () => { calls.push("prepare"); },
+      removeNativeService: () => { calls.push("remove-native-service"); },
       publishAssets: () => { calls.push("publish-assets"); },
       runTask: () => { calls.push("run-task"); },
       writeState: () => { calls.push("write-state"); },
@@ -853,6 +856,7 @@ describe("service lifecycle cleanup ordering", () => {
       stageRegistrationXml: () => "attempt.xml",
       register: async () => { calls.push("register"); },
       prepare: async () => { calls.push("prepare"); throw new Error("standalone stop failed"); },
+      removeNativeService: () => { calls.push("remove-native-service"); },
       publishAssets: () => { calls.push("publish-assets"); },
       runTask: () => { calls.push("run-task"); },
       writeState: () => { calls.push("write-state"); },
@@ -869,6 +873,7 @@ describe("service lifecycle cleanup ordering", () => {
       stageRegistrationXml: () => "attempt.xml",
       register: async () => { calls.push("register"); },
       prepare: async () => { calls.push("prepare"); },
+      removeNativeService: () => { calls.push("remove-native-service"); },
       publishAssets: () => { calls.push("publish-assets"); },
       runTask: () => { calls.push("run-task"); },
       writeState: () => { calls.push("write-state"); throw new Error("state write failed"); },
@@ -879,13 +884,37 @@ describe("service lifecycle cleanup ordering", () => {
     expect(calls).toEqual([
       "register",
       "prepare",
+      "remove-native-service",
       "publish-assets",
       "run-task",
       "write-state",
       "remove-stage",
     ]);
   });
 
+  test("fresh scheduler install rolls back before publication when native service removal fails", async () => {
+    const calls: string[] = [];
+    await expect(installFreshWindowsSchedulerSafely({
+      stageRegistrationXml: () => "attempt.xml",
+      register: async () => { calls.push("register"); },
+      prepare: async () => { calls.push("prepare"); },
+      removeNativeService: () => { calls.push("remove-native-service"); throw new Error("native service remains"); },
+      publishAssets: () => { calls.push("publish-assets"); },
+      runTask: () => { calls.push("run-task"); },
+      writeState: () => { calls.push("write-state"); },
+      rollbackTask: async () => { calls.push("rollback-task"); return null; },
+      removeStagedXml: () => { calls.push("remove-stage"); },
+    })).rejects.toThrow("native service remains");
+
+    expect(calls).toEqual([
+      "register",
+      "prepare",
+      "remove-native-service",
+      "rollback-task",
+      "remove-stage",
+    ]);
+  });
+
   test("service install stops the recorded backend, requested backend, and standalone before loading assets", async () => {
     const calls: string[] = [];
     const managerOps = (backend: "scheduler" | "native") => ({