Updated the files.

my-app/node_modules/@angular-devkit/architect/node/jobs/job-registry.d.ts

@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { jobs } from '@angular-devkit/architect';
+import { JsonValue } from '@angular-devkit/core';
+import { Observable } from 'rxjs';
+export declare class NodeModuleJobRegistry<MinimumArgumentValueT extends JsonValue = JsonValue, MinimumInputValueT extends JsonValue = JsonValue, MinimumOutputValueT extends JsonValue = JsonValue> implements jobs.Registry<MinimumArgumentValueT, MinimumInputValueT, MinimumOutputValueT> {
+    protected _resolve(name: string): string | null;
+    /**
+     * Get a job description for a named job.
+     *
+     * @param name The name of the job.
+     * @returns A description, or null if the job is not registered.
+     */
+    get<A extends MinimumArgumentValueT, I extends MinimumInputValueT, O extends MinimumOutputValueT>(name: jobs.JobName): Observable<jobs.JobHandler<A, I, O> | null>;
+}

my-app/node_modules/@angular-devkit/architect/node/jobs/job-registry.js

@@ -0,0 +1,59 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.NodeModuleJobRegistry = void 0;
+const core_1 = require("@angular-devkit/core");
+const rxjs_1 = require("rxjs");
+class NodeModuleJobRegistry {
+    _resolve(name) {
+        try {
+            return require.resolve(name);
+        }
+        catch (e) {
+            if (e.code === 'MODULE_NOT_FOUND') {
+                return null;
+            }
+            throw e;
+        }
+    }
+    /**
+     * Get a job description for a named job.
+     *
+     * @param name The name of the job.
+     * @returns A description, or null if the job is not registered.
+     */
+    get(name) {
+        const [moduleName, exportName] = name.split(/#/, 2);
+        const resolvedPath = this._resolve(moduleName);
+        if (!resolvedPath) {
+            return (0, rxjs_1.of)(null);
+        }
+        const pkg = require(resolvedPath);
+        const handler = pkg[exportName || 'default'];
+        if (!handler) {
+            return (0, rxjs_1.of)(null);
+        }
+        function _getValue(...fields) {
+            return fields.find((x) => core_1.schema.isJsonSchema(x)) || true;
+        }
+        const argument = _getValue(pkg.argument, handler.argument);
+        const input = _getValue(pkg.input, handler.input);
+        const output = _getValue(pkg.output, handler.output);
+        const channels = _getValue(pkg.channels, handler.channels);
+        return (0, rxjs_1.of)(Object.assign(handler.bind(undefined), {
+            jobDescription: {
+                argument,
+                input,
+                output,
+                channels,
+            },
+        }));
+    }
+}
+exports.NodeModuleJobRegistry = NodeModuleJobRegistry;