feat(CUB-58): Agent Status SignalR Service (Angular)

- Scaffold Angular 17 frontend with standalone components - Add @microsoft/signalr package dependency - Create AgentStatusService connecting to /hub endpoint - Auto-reconnect with progressive delays - Listens for AgentStatusChanged and BroadcastMessage - Logs all updates to console - Exposes statusUpdates$ and connected$ observables - onStatusUpdate() alias matching CUB-58 spec - Create AgentStatusUpdate interface (agentId, status, lastSeenAt) - Add APP_INITIALIZER provider to start connection on app boot - Register initializer in app.config.ts - Update .gitignore for frontend build artifacts
2026-04-26 07:21:47 +00:00
27 changed files with 15307 additions and 1 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,10 @@ bin/
 obj/
 *.user
 *.suo
-.vs/
+.vs/
+
+# Frontend (Angular)
+frontend/node_modules/
+frontend/dist/
+frontend/.angular/
+frontend/*.log
--- a/frontend/.editorconfig
+++ b/frontend/.editorconfig
@@ -0,0 +1,16 @@
+# Editor configuration, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.ts]
+quote_type = single
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false
--- a/frontend/.gitignore
+++ b/frontend/.gitignore
@@ -0,0 +1,42 @@
+# See https://docs.github.com/get-started/getting-started-with-git/ignoring-files for more about ignoring files.
+
+# Compiled output
+/dist
+/tmp
+/out-tsc
+/bazel-out
+
+# Node
+/node_modules
+npm-debug.log
+yarn-error.log
+
+# IDEs and editors
+.idea/
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# Visual Studio Code
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+.history/*
+
+# Miscellaneous
+/.angular/cache
+.sass-cache/
+/connect.lock
+/coverage
+/libpeerconnection.log
+testem.log
+/typings
+
+# System files
+.DS_Store
+Thumbs.db
--- a/frontend/.vscode/extensions.json
+++ b/frontend/.vscode/extensions.json
@@ -0,0 +1,4 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=827846
+  "recommendations": ["angular.ng-template"]
+}
--- a/frontend/.vscode/launch.json
+++ b/frontend/.vscode/launch.json
@@ -0,0 +1,20 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "ng serve",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: start",
+      "url": "http://localhost:4200/"
+    },
+    {
+      "name": "ng test",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: test",
+      "url": "http://localhost:9876/debug.html"
+    }
+  ]
+}
--- a/frontend/.vscode/tasks.json
+++ b/frontend/.vscode/tasks.json
@@ -0,0 +1,42 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?LinkId=733558
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "type": "npm",
+      "script": "start",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "(.*?)"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation complete"
+          }
+        }
+      }
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "(.*?)"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation complete"
+          }
+        }
+      }
+    }
+  ]
+}
--- a/frontend/README.md
+++ b/frontend/README.md
@@ -0,0 +1,27 @@
+# Frontend
+
+This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 17.3.17.
+
+## Development server
+
+Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The application will automatically reload if you change any of the source files.
+
+## Code scaffolding
+
+Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.
+
+## Build
+
+Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory.
+
+## Running unit tests
+
+Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).
+
+## Running end-to-end tests
+
+Run `ng e2e` to execute the end-to-end tests via a platform of your choice. To use this command, you need to first add a package that implements end-to-end testing capabilities.
+
+## Further help
+
+To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI Overview and Command Reference](https://angular.io/cli) page.
--- a/frontend/angular.json
+++ b/frontend/angular.json
@@ -0,0 +1,123 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "newProjectRoot": "projects",
+  "projects": {
+    "frontend": {
+      "projectType": "application",
+      "schematics": {
+        "@schematics/angular:component": {
+          "style": "scss",
+          "skipTests": true
+        },
+        "@schematics/angular:class": {
+          "skipTests": true
+        },
+        "@schematics/angular:directive": {
+          "skipTests": true
+        },
+        "@schematics/angular:guard": {
+          "skipTests": true
+        },
+        "@schematics/angular:interceptor": {
+          "skipTests": true
+        },
+        "@schematics/angular:pipe": {
+          "skipTests": true
+        },
+        "@schematics/angular:resolver": {
+          "skipTests": true
+        },
+        "@schematics/angular:service": {
+          "skipTests": true
+        }
+      },
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-angular:application",
+          "options": {
+            "outputPath": "dist/frontend",
+            "index": "src/index.html",
+            "browser": "src/main.ts",
+            "polyfills": [
+              "zone.js"
+            ],
+            "tsConfig": "tsconfig.app.json",
+            "inlineStyleLanguage": "scss",
+            "assets": [
+              "src/favicon.ico",
+              "src/assets"
+            ],
+            "styles": [
+              "src/styles.scss"
+            ],
+            "scripts": []
+          },
+          "configurations": {
+            "production": {
+              "budgets": [
+                {
+                  "type": "initial",
+                  "maximumWarning": "500kb",
+                  "maximumError": "1mb"
+                },
+                {
+                  "type": "anyComponentStyle",
+                  "maximumWarning": "2kb",
+                  "maximumError": "4kb"
+                }
+              ],
+              "outputHashing": "all"
+            },
+            "development": {
+              "optimization": false,
+              "extractLicenses": false,
+              "sourceMap": true
+            }
+          },
+          "defaultConfiguration": "production"
+        },
+        "serve": {
+          "builder": "@angular-devkit/build-angular:dev-server",
+          "configurations": {
+            "production": {
+              "buildTarget": "frontend:build:production"
+            },
+            "development": {
+              "buildTarget": "frontend:build:development"
+            }
+          },
+          "defaultConfiguration": "development"
+        },
+        "extract-i18n": {
+          "builder": "@angular-devkit/build-angular:extract-i18n",
+          "options": {
+            "buildTarget": "frontend:build"
+          }
+        },
+        "test": {
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "polyfills": [
+              "zone.js",
+              "zone.js/testing"
+            ],
+            "tsConfig": "tsconfig.spec.json",
+            "inlineStyleLanguage": "scss",
+            "assets": [
+              "src/favicon.ico",
+              "src/assets"
+            ],
+            "styles": [
+              "src/styles.scss"
+            ],
+            "scripts": []
+          }
+        }
+      }
+    }
+  }
+}
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "frontend",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
+  },
+  "private": true,
+  "dependencies": {
+    "@angular/animations": "^17.3.0",
+    "@angular/common": "^17.3.0",
+    "@angular/compiler": "^17.3.0",
+    "@angular/core": "^17.3.0",
+    "@angular/forms": "^17.3.0",
+    "@angular/material": "^17.3.10",
+    "@angular/platform-browser": "^17.3.0",
+    "@angular/platform-browser-dynamic": "^17.3.0",
+    "@angular/router": "^17.3.0",
+    "@microsoft/signalr": "^10.0.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0",
+    "zone.js": "~0.14.3"
+  },
+  "devDependencies": {
+    "@angular-devkit/build-angular": "^17.3.17",
+    "@angular/cli": "^17.3.17",
+    "@angular/compiler-cli": "^17.3.0",
+    "@types/jasmine": "~5.1.0",
+    "jasmine-core": "~5.1.0",
+    "karma": "~6.4.0",
+    "karma-chrome-launcher": "~3.2.0",
+    "karma-coverage": "~2.2.0",
+    "karma-jasmine": "~5.1.0",
+    "karma-jasmine-html-reporter": "~2.1.0",
+    "typescript": "~5.4.2"
+  }
+}
--- a/frontend/src/app/app.component.html
+++ b/frontend/src/app/app.component.html
@@ -0,0 +1,336 @@
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+<!-- * * * * * * * * * * * The content below * * * * * * * * * * * -->
+<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * -->
+<!-- * * * * * * * * * * and can be replaced.  * * * * * * * * * * -->
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+<!-- * * * * * * * * * Delete the template below * * * * * * * * * -->
+<!-- * * * * * * * to get started with your project! * * * * * * * -->
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+
+<style>
+  :host {
+    --bright-blue: oklch(51.01% 0.274 263.83);
+    --electric-violet: oklch(53.18% 0.28 296.97);
+    --french-violet: oklch(47.66% 0.246 305.88);
+    --vivid-pink: oklch(69.02% 0.277 332.77);
+    --hot-red: oklch(61.42% 0.238 15.34);
+    --orange-red: oklch(63.32% 0.24 31.68);
+
+    --gray-900: oklch(19.37% 0.006 300.98);
+    --gray-700: oklch(36.98% 0.014 302.71);
+    --gray-400: oklch(70.9% 0.015 304.04);
+
+    --red-to-pink-to-purple-vertical-gradient: linear-gradient(
+      180deg,
+      var(--orange-red) 0%,
+      var(--vivid-pink) 50%,
+      var(--electric-violet) 100%
+    );
+
+    --red-to-pink-to-purple-horizontal-gradient: linear-gradient(
+      90deg,
+      var(--orange-red) 0%,
+      var(--vivid-pink) 50%,
+      var(--electric-violet) 100%
+    );
+
+    --pill-accent: var(--bright-blue);
+
+    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
+      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
+      "Segoe UI Symbol";
+    box-sizing: border-box;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+  }
+
+  h1 {
+    font-size: 3.125rem;
+    color: var(--gray-900);
+    font-weight: 500;
+    line-height: 100%;
+    letter-spacing: -0.125rem;
+    margin: 0;
+    font-family: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
+      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
+      "Segoe UI Symbol";
+  }
+
+  p {
+    margin: 0;
+    color: var(--gray-700);
+  }
+
+  main {
+    width: 100%;
+    min-height: 100%;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    padding: 1rem;
+    box-sizing: inherit;
+    position: relative;
+  }
+
+  .angular-logo {
+    max-width: 9.2rem;
+  }
+
+  .content {
+    display: flex;
+    justify-content: space-around;
+    width: 100%;
+    max-width: 700px;
+    margin-bottom: 3rem;
+  }
+
+  .content h1 {
+    margin-top: 1.75rem;
+  }
+
+  .content p {
+    margin-top: 1.5rem;
+  }
+
+  .divider {
+    width: 1px;
+    background: var(--red-to-pink-to-purple-vertical-gradient);
+    margin-inline: 0.5rem;
+  }
+
+  .pill-group {
+    display: flex;
+    flex-direction: column;
+    align-items: start;
+    flex-wrap: wrap;
+    gap: 1.25rem;
+  }
+
+  .pill {
+    display: flex;
+    align-items: center;
+    --pill-accent: var(--bright-blue);
+    background: color-mix(in srgb, var(--pill-accent) 5%, transparent);
+    color: var(--pill-accent);
+    padding-inline: 0.75rem;
+    padding-block: 0.375rem;
+    border-radius: 2.75rem;
+    border: 0;
+    transition: background 0.3s ease;
+    font-family: var(--inter-font);
+    font-size: 0.875rem;
+    font-style: normal;
+    font-weight: 500;
+    line-height: 1.4rem;
+    letter-spacing: -0.00875rem;
+    text-decoration: none;
+  }
+
+  .pill:hover {
+    background: color-mix(in srgb, var(--pill-accent) 15%, transparent);
+  }
+
+  .pill-group .pill:nth-child(6n + 1) {
+    --pill-accent: var(--bright-blue);
+  }
+  .pill-group .pill:nth-child(6n + 2) {
+    --pill-accent: var(--french-violet);
+  }
+  .pill-group .pill:nth-child(6n + 3),
+  .pill-group .pill:nth-child(6n + 4),
+  .pill-group .pill:nth-child(6n + 5) {
+    --pill-accent: var(--hot-red);
+  }
+
+  .pill-group svg {
+    margin-inline-start: 0.25rem;
+  }
+
+  .social-links {
+    display: flex;
+    align-items: center;
+    gap: 0.73rem;
+    margin-top: 1.5rem;
+  }
+
+  .social-links path {
+    transition: fill 0.3s ease;
+    fill: var(--gray-400);
+  }
+
+  .social-links a:hover svg path {
+    fill: var(--gray-900);
+  }
+
+  @media screen and (max-width: 650px) {
+    .content {
+      flex-direction: column;
+      width: max-content;
+    }
+
+    .divider {
+      height: 1px;
+      width: 100%;
+      background: var(--red-to-pink-to-purple-horizontal-gradient);
+      margin-block: 1.5rem;
+    }
+  }
+</style>
+
+<main class="main">
+  <div class="content">
+    <div class="left-side">
+      <svg
+        xmlns="http://www.w3.org/2000/svg"
+        viewBox="0 0 982 239"
+        fill="none"
+        class="angular-logo"
+      >
+        <g clip-path="url(#a)">
+          <path
+            fill="url(#b)"
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+          />
+        </g>
+        <defs>
+          <radialGradient
+            id="c"
+            cx="0"
+            cy="0"
+            r="1"
+            gradientTransform="rotate(118.122 171.182 60.81) scale(205.794)"
+            gradientUnits="userSpaceOnUse"
+          >
+            <stop stop-color="#FF41F8" />
+            <stop offset=".707" stop-color="#FF41F8" stop-opacity=".5" />
+            <stop offset="1" stop-color="#FF41F8" stop-opacity="0" />
+          </radialGradient>
+          <linearGradient
+            id="b"
+            x1="0"
+            x2="982"
+            y1="192"
+            y2="192"
+            gradientUnits="userSpaceOnUse"
+          >
+            <stop stop-color="#F0060B" />
+            <stop offset="0" stop-color="#F0070C" />
+            <stop offset=".526" stop-color="#CC26D5" />
+            <stop offset="1" stop-color="#7702FF" />
+          </linearGradient>
+          <clipPath id="a"><path fill="#fff" d="M0 0h982v239H0z" /></clipPath>
+        </defs>
+      </svg>
+      <h1>Hello, {{ title }}</h1>
+      <p>Congratulations! Your app is running. 🎉</p>
+    </div>
+    <div class="divider" role="separator" aria-label="Divider"></div>
+    <div class="right-side">
+      <div class="pill-group">
+        @for (item of [
+          { title: 'Explore the Docs', link: 'https://angular.dev' },
+          { title: 'Learn with Tutorials', link: 'https://angular.dev/tutorials' },
+          { title: 'CLI Docs', link: 'https://angular.dev/tools/cli' },
+          { title: 'Angular Language Service', link: 'https://angular.dev/tools/language-service' },
+          { title: 'Angular DevTools', link: 'https://angular.dev/tools/devtools' },
+        ]; track item.title) {
+          <a
+            class="pill"
+            [href]="item.link"
+            target="_blank"
+            rel="noopener"
+          >
+            <span>{{ item.title }}</span>
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              height="14"
+              viewBox="0 -960 960 960"
+              width="14"
+              fill="currentColor"
+            >
+              <path
+                d="M200-120q-33 0-56.5-23.5T120-200v-560q0-33 23.5-56.5T200-840h280v80H200v560h560v-280h80v280q0 33-23.5 56.5T760-120H200Zm188-212-56-56 372-372H560v-80h280v280h-80v-144L388-332Z"
+              />
+            </svg>
+          </a>
+        }
+      </div>
+      <div class="social-links">
+        <a
+          href="https://github.com/angular/angular"
+          aria-label="Github"
+          target="_blank"
+          rel="noopener"
+        >
+          <svg
+            width="25"
+            height="24"
+            viewBox="0 0 25 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg"
+            alt="Github"
+          >
+            <path
+              d="M12.3047 0C5.50634 0 0 5.50942 0 12.3047C0 17.7423 3.52529 22.3535 8.41332 23.9787C9.02856 24.0946 9.25414 23.7142 9.25414 23.3871C9.25414 23.0949 9.24389 22.3207 9.23876 21.2953C5.81601 22.0377 5.09414 19.6444 5.09414 19.6444C4.53427 18.2243 3.72524 17.8449 3.72524 17.8449C2.61064 17.082 3.81137 17.0973 3.81137 17.0973C5.04697 17.1835 5.69604 18.3647 5.69604 18.3647C6.79321 20.2463 8.57636 19.7029 9.27978 19.3881C9.39052 18.5924 9.70736 18.0499 10.0591 17.7423C7.32641 17.4347 4.45429 16.3765 4.45429 11.6618C4.45429 10.3185 4.9311 9.22133 5.72065 8.36C5.58222 8.04931 5.16694 6.79833 5.82831 5.10337C5.82831 5.10337 6.85883 4.77319 9.2121 6.36459C10.1965 6.09082 11.2424 5.95546 12.2883 5.94931C13.3342 5.95546 14.3801 6.09082 15.3644 6.36459C17.7023 4.77319 18.7328 5.10337 18.7328 5.10337C19.3942 6.79833 18.9789 8.04931 18.8559 8.36C19.6403 9.22133 20.1171 10.3185 20.1171 11.6618C20.1171 16.3888 17.2409 17.4296 14.5031 17.7321C14.9338 18.1012 15.3337 18.8559 15.3337 20.0084C15.3337 21.6552 15.3183 22.978 15.3183 23.3779C15.3183 23.7009 15.5336 24.0854 16.1642 23.9623C21.0871 22.3484 24.6094 17.7341 24.6094 12.3047C24.6094 5.50942 19.0999 0 12.3047 0Z"
+            />
+          </svg>
+        </a>
+        <a
+          href="https://twitter.com/angular"
+          aria-label="Twitter"
+          target="_blank"
+          rel="noopener"
+        >
+          <svg
+            width="24"
+            height="24"
+            viewBox="0 0 24 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg"
+            alt="Twitter"
+          >
+            <path
+              d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z"
+            />
+          </svg>
+        </a>
+        <a
+          href="https://www.youtube.com/channel/UCbn1OgGei-DV7aSRo_HaAiw"
+          aria-label="Youtube"
+          target="_blank"
+          rel="noopener"
+        >
+          <svg
+            width="29"
+            height="20"
+            viewBox="0 0 29 20"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg"
+            alt="Youtube"
+          >
+            <path
+              fill-rule="evenodd"
+              clip-rule="evenodd"
+              d="M27.4896 1.52422C27.9301 1.96749 28.2463 2.51866 28.4068 3.12258C29.0004 5.35161 29.0004 10 29.0004 10C29.0004 10 29.0004 14.6484 28.4068 16.8774C28.2463 17.4813 27.9301 18.0325 27.4896 18.4758C27.0492 18.9191 26.5 19.2389 25.8972 19.4032C23.6778 20 14.8068 20 14.8068 20C14.8068 20 5.93586 20 3.71651 19.4032C3.11363 19.2389 2.56449 18.9191 2.12405 18.4758C1.68361 18.0325 1.36732 17.4813 1.20683 16.8774C0.613281 14.6484 0.613281 10 0.613281 10C0.613281 10 0.613281 5.35161 1.20683 3.12258C1.36732 2.51866 1.68361 1.96749 2.12405 1.52422C2.56449 1.08095 3.11363 0.76113 3.71651 0.596774C5.93586 0 14.8068 0 14.8068 0C14.8068 0 23.6778 0 25.8972 0.596774C26.5 0.76113 27.0492 1.08095 27.4896 1.52422ZM19.3229 10L11.9036 5.77905V14.221L19.3229 10Z"
+            />
+          </svg>
+        </a>
+      </div>
+    </div>
+  </div>
+</main>
+
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+<!-- * * * * * * * * * * * The content above * * * * * * * * * * * * -->
+<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * * -->
+<!-- * * * * * * * * * * and can be replaced.  * * * * * * * * * * * -->
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
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+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+
+
+<router-outlet />
--- a/frontend/src/app/app.component.scss
+++ b/frontend/src/app/app.component.scss
--- a/frontend/src/app/app.component.ts
+++ b/frontend/src/app/app.component.ts
@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+
+@Component({
+  selector: 'app-root',
+  standalone: true,
+  imports: [RouterOutlet],
+  templateUrl: './app.component.html',
+  styleUrl: './app.component.scss'
+})
+export class AppComponent {
+  title = 'frontend';
+}
--- a/frontend/src/app/app.config.ts
+++ b/frontend/src/app/app.config.ts
@@ -0,0 +1,12 @@
+import { ApplicationConfig } from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+import { routes } from './app.routes';
+import { provideAgentStatusInitializer } from './services/agent-status-initializer';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideRouter(routes),
+    ...provideAgentStatusInitializer(),
+  ]
+};
--- a/frontend/src/app/app.routes.ts
+++ b/frontend/src/app/app.routes.ts
@@ -0,0 +1,3 @@
+import { Routes } from '@angular/router';
+
+export const routes: Routes = [];
--- a/frontend/src/app/models/agent-status.ts
+++ b/frontend/src/app/models/agent-status.ts
@@ -0,0 +1,15 @@
+/**
+ * Data models for agent status updates received via SignalR.
+ */
+
+/** Represents a single agent status update pushed from the server. */
+export interface AgentStatusUpdate {
+  /** Unique identifier of the agent whose status changed. */
+  agentId: string;
+
+  /** Current operational status of the agent (e.g., "Online", "Offline", "Busy", "Error"). */
+  status: string;
+
+  /** ISO 8601 timestamp of when this status was observed, or null if unknown. */
+  lastSeenAt: string | null;
+}
--- a/frontend/src/app/services/agent-status-initializer.ts
+++ b/frontend/src/app/services/agent-status-initializer.ts
@@ -0,0 +1,24 @@
+import { APP_INITIALIZER, Provider } from '@angular/core';
+import { AgentStatusService } from './agent-status.service';
+
+/**
+ * Provider that starts the AgentStatusService SignalR connection
+ * during application initialization. Inject this in your app config
+ * providers array to ensure the hub connection is established on startup.
+ *
+ * Usage in app.config.ts:
+ *   providers: [provideAgentStatusInitializer()]
+ */
+export function provideAgentStatusInitializer(): Provider[] {
+  return [
+    {
+      provide: APP_INITIALIZER,
+      useFactory: (agentStatusService: AgentStatusService) => () => {
+        // Fire-and-forget: connection errors are logged by the service
+        agentStatusService.startConnection();
+      },
+      multi: true,
+      deps: [AgentStatusService],
+    },
+  ];
+}
--- a/frontend/src/app/services/agent-status.service.ts
+++ b/frontend/src/app/services/agent-status.service.ts
@@ -0,0 +1,141 @@
+import { Injectable, OnDestroy } from '@angular/core';
+import { BehaviorSubject, Observable, Subject, Subscription } from 'rxjs';
+import * as signalR from '@microsoft/signalr';
+
+import { AgentStatusUpdate } from '../models/agent-status';
+
+/**
+ * Angular service that manages a SignalR connection to the agent status hub
+ * and exposes real-time status updates as observables.
+ *
+ * Usage:
+ *   Inject `AgentStatusService` and subscribe to `onStatusUpdate()`
+ *   to receive push notifications whenever an agent's status changes.
+ *
+ * The connection is established automatically on app start via
+ * `APP_INITIALIZER` (configured in `app.config.ts`) and cleaned up
+ * when the service is destroyed.
+ */
+@Injectable({ providedIn: 'root' })
+export class AgentStatusService implements OnDestroy {
+  /** Base URL for the SignalR hub endpoint. */
+  private readonly hubUrl = '/hub';
+
+  /** Underlying SignalR connection instance. */
+  private hubConnection: signalR.HubConnection | null = null;
+
+  /** Internal subject that emits status updates received from the hub. */
+  private readonly statusUpdateSubject = new Subject<AgentStatusUpdate>();
+
+  /** Tracks the current connection state. Emits true when connected. */
+  private readonly connectedSubject = new BehaviorSubject<boolean>(false);
+
+  /** Subscription for auto-reconnect attempts. */
+  private reconnectSubscription: Subscription | null = null;
+
+  // ── Public Observables ──────────────────────────────────────
+
+  /** Observable that emits agent status updates pushed from the server. */
+  readonly statusUpdates$: Observable<AgentStatusUpdate> =
+    this.statusUpdateSubject.asObservable();
+
+  /** Observable that emits the current connection state (true = connected). */
+  readonly connected$: Observable<boolean> =
+    this.connectedSubject.asObservable();
+
+  // ── Lifecycle ───────────────────────────────────────────────
+
+  /** @inheritdoc */
+  ngOnDestroy(): void {
+    this.stopConnection();
+  }
+
+  // ── Connection Management ───────────────────────────────────
+
+  /**
+   * Starts the SignalR connection to the agent status hub.
+   * Safe to call multiple times — no-ops if already connected.
+   */
+  async startConnection(): Promise<void> {
+    if (this.hubConnection) {
+      return; // Already initialized
+    }
+
+    this.hubConnection = new signalR.HubConnectionBuilder()
+      .withUrl(this.hubUrl)
+      .withAutomaticReconnect([0, 2000, 5000, 10000, 30000])
+      .configureLogging(signalR.LogLevel.Information)
+      .build();
+
+    // Register server-to-client handlers
+    this.registerHandlers(this.hubConnection);
+
+    // Wire up lifecycle events
+    this.hubConnection.onreconnecting(() => {
+      console.warn('[AgentStatusService] Reconnecting to hub…');
+      this.connectedSubject.next(false);
+    });
+
+    this.hubConnection.onreconnected(() => {
+      console.info('[AgentStatusService] Reconnected to hub.');
+      this.connectedSubject.next(true);
+    });
+
+    this.hubConnection.onclose((error) => {
+      console.error('[AgentStatusService] Hub connection closed.', error);
+      this.connectedSubject.next(false);
+    });
+
+    try {
+      await this.hubConnection.start();
+      this.connectedSubject.next(true);
+      console.info('[AgentStatusService] Connected to hub at', this.hubUrl);
+    } catch (err) {
+      console.error('[AgentStatusService] Failed to connect to hub:', err);
+      this.connectedSubject.next(false);
+    }
+  }
+
+  /**
+   * Stops the SignalR connection and cleans up resources.
+   */
+  async stopConnection(): Promise<void> {
+    if (this.hubConnection) {
+      await this.hubConnection.stop();
+      this.hubConnection = null;
+      this.connectedSubject.next(false);
+    }
+    this.reconnectSubscription?.unsubscribe();
+    this.reconnectSubscription = null;
+  }
+
+  // ── Convenience Alias ────────────────────────────────────────
+
+  /**
+   * Alias for `statusUpdates$` — matches the interface described in CUB-58.
+   * Returns an Observable that emits every time the server pushes a
+   * status update for an agent.
+   */
+  onStatusUpdate(): Observable<AgentStatusUpdate> {
+    return this.statusUpdates$;
+  }
+
+  // ── Private Helpers ─────────────────────────────────────────
+
+  /**
+   * Registers handlers for server-to-client calls on the hub connection.
+   */
+  private registerHandlers(connection: signalR.HubConnection): void {
+    // Agent status changed — full update payload
+    connection.on('AgentStatusChanged', (agentId: string, status: string, lastSeenAt: string | null) => {
+      const update: AgentStatusUpdate = { agentId, status, lastSeenAt };
+      console.info('[AgentStatusService] Status update received:', update);
+      this.statusUpdateSubject.next(update);
+    });
+
+    // Generic broadcast for testing — logs to console per CUB-58 DoD
+    connection.on('BroadcastMessage', (message: string) => {
+      console.info('[AgentStatusService] Broadcast message:', message);
+    });
+  }
+}
--- a/frontend/src/app/services/index.ts
+++ b/frontend/src/app/services/index.ts
@@ -0,0 +1,7 @@
+/**
+ * Barrel file for agent status services and models.
+ * Re-export public API from this module for clean imports.
+ */
+export { AgentStatusService } from './agent-status.service';
+export { provideAgentStatusInitializer } from './agent-status-initializer';
+export { AgentStatusUpdate } from '../models/agent-status';
--- a/frontend/src/assets/.gitkeep
+++ b/frontend/src/assets/.gitkeep
--- a/frontend/src/favicon.ico
+++ b/frontend/src/favicon.ico
--- a/frontend/src/index.html
+++ b/frontend/src/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>Frontend</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
+  <app-root></app-root>
+</body>
+</html>
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -0,0 +1,6 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { AppComponent } from './app/app.component';
+
+bootstrapApplication(AppComponent, appConfig)
+  .catch((err) => console.error(err));
--- a/frontend/src/styles.scss
+++ b/frontend/src/styles.scss
@@ -0,0 +1 @@
+/* You can add global styles to this file, and also import other style files */
--- a/frontend/tsconfig.app.json
+++ b/frontend/tsconfig.app.json
@@ -0,0 +1,14 @@
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/app",
+    "types": []
+  },
+  "files": [
+    "src/main.ts"
+  ],
+  "include": [
+    "src/**/*.d.ts"
+  ]
+}
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -0,0 +1,32 @@
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "outDir": "./dist/out-tsc",
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "declaration": false,
+    "experimentalDecorators": true,
+    "moduleResolution": "node",
+    "importHelpers": true,
+    "target": "ES2022",
+    "module": "ES2022",
+    "useDefineForClassFields": false,
+    "lib": [
+      "ES2022",
+      "dom"
+    ]
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}
--- a/frontend/tsconfig.spec.json
+++ b/frontend/tsconfig.spec.json
@@ -0,0 +1,14 @@
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/spec",
+    "types": [
+      "jasmine"
+    ]
+  },
+  "include": [
+    "src/**/*.spec.ts",
+    "src/**/*.d.ts"
+  ]
+}
				`@@ -0,0 +1 @@`
				`/* You can add global styles to this file, and also import other style files */`