diff --git a/Dockerfile b/Dockerfile
index 9988d0d..0db1936 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,18 +1,25 @@
 # Minimal Android Cast CI image (glibc-based; NDK prebuilts require linux-x86_64 glibc).
 #
 # Build:
-#   docker build -t androidcast-ci:latest -f Dockerfile .
+#   docker build --build-arg ANDROIDCAST_CI_VERSION=00.01.00.1000 -t androidcast-ci:00.01.00.1000 -f Dockerfile .
 #
 # Run CI build (mount repo):
 #   docker run --rm -v "$(pwd)":/workspace -w /workspace androidcast-ci:latest
 #
-# Interactive:
-#   docker run --rm -it -v "$(pwd)":/workspace -w /workspace androidcast-ci:latest bash
-#
-# Note: Alpine/musl breaks NDK clang prebuilts; use Debian slim instead of rust:* for size.
+# CI image version (AA.BB.CC.DDDD — AA always 00)
+ARG ANDROIDCAST_CI_MAJOR=00
+ARG ANDROIDCAST_CI_MINOR=01
+ARG ANDROIDCAST_CI_PATCH=00
+ARG ANDROIDCAST_CI_BUILD=1000
+ARG ANDROIDCAST_CI_VERSION=00.01.00.1000
 
 FROM debian:bookworm-slim
 
+ARG ANDROIDCAST_CI_VERSION
+LABEL org.androidcast.ci.version="${ANDROIDCAST_CI_VERSION}"
+LABEL org.opencontainers.image.title="androidcast-ci"
+LABEL org.opencontainers.image.version="${ANDROIDCAST_CI_VERSION}"
+
 ARG DEBIAN_FRONTEND=noninteractive
 ARG ANDROID_SDK_ROOT=/opt/android-sdk
 ARG ANDROID_NDK_VERSION=27.0.12077973
@@ -26,6 +33,7 @@ ENV ANDROID_SDK_ROOT="${ANDROID_SDK_ROOT}" \
     PATH="${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin:${PATH}" \
     ANDROIDCAST_CCACHE=1 \
     ANDROIDCAST_USE_DISTCC=0 \
+    ANDROIDCAST_CI_VERSION="${ANDROIDCAST_CI_VERSION}" \
     GRADLE_USER_HOME=/root/.gradle \
     JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64
 
@@ -34,7 +42,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         ninja-build cmake ccache \
     && rm -rf /var/lib/apt/lists/*
 
-# Optional distributed compile (off unless ANDROIDCAST_USE_DISTCC=1 + DISTCC_HOSTS at run time).
 RUN apt-get update && apt-get install -y --no-install-recommends distcc \
     && rm -rf /var/lib/apt/lists/* || true
 
@@ -55,13 +62,13 @@ RUN yes | sdkmanager --licenses >/dev/null \
 
 WORKDIR /workspace
 
-# Pre-create ccache dir (volume can override at runtime).
 RUN mkdir -p /workspace/build/.ccache || true
 
-COPY scripts/ci-build.sh scripts/android-ndk.sh scripts/native-build-cache.sh scripts/build-native-codecs.sh \
+COPY scripts/ci-build.sh scripts/ci-build-and-publish-ota.sh scripts/generate-ota-v0.sh \
+    scripts/android-ndk.sh scripts/native-build-cache.sh scripts/build-native-codecs.sh \
     /workspace/scripts/
 
-RUN chmod +x /workspace/scripts/ci-build.sh /workspace/scripts/build-native-codecs.sh
+RUN chmod +x /workspace/scripts/ci-build.sh /workspace/scripts/ci-build-and-publish-ota.sh \
+    /workspace/scripts/generate-ota-v0.sh /workspace/scripts/build-native-codecs.sh
 
-# Full tree is bind-mounted in CI; default command runs the pipeline.
 CMD ["./scripts/ci-build.sh"]
diff --git a/docs/BUILD_DEPLOY.md b/docs/BUILD_DEPLOY.md
new file mode 100644
index 0000000..c717b08
--- /dev/null
+++ b/docs/BUILD_DEPLOY.md
@@ -0,0 +1,62 @@
+# Android Cast build ecosystem
+
+## Shared authentication
+
+All web consoles (Crashes, Tickets, Builder) share:
+
+| Setting | Value |
+|---------|--------|
+| Session name | `ac_crash_sess` |
+| Cookie path | `/app/androidcast_project` |
+| User store | MariaDB `users` table (same DB as crashes) |
+| PHP auth | `examples/crash_reporter/backend/src/Auth.php` |
+
+Sign in once on any console; the session cookie is valid for `/crashes/`, `/build/`, and future apps under the same path prefix.
+
+Orchestration generates matching configs:
+
+- `orchestration/runtime/crash-config.php`
+- `orchestration/runtime/build-config.php`
+
+Both use `${MARIADB_USER}` / `${MARIADB_PASSWORD}` from `orchestration/.env`.
+
+## Local stack
+
+```bash
+cd orchestration
+./deploy.sh
+```
+
+| URL | Purpose |
+|-----|---------|
+| `http://localhost:8080/app/androidcast_project/` | Hub landing |
+| `…/crashes/` | Crash / ticket console |
+| `…/build/` | APK builder console |
+| `…/v0/ota/` | Published OTA artifacts (when auto-deploy enabled) |
+
+Direct debug ports: crashes `:8082`, builder `:8083`.
+
+## Trigger a build
+
+1. Open Builder → sign in (default dev user from crash schema seed).
+2. Set git ref, pipeline options, OTA channel.
+3. **Start build** → detail page polls log every 1s.
+4. Artifacts land in `out/builds/<id>/`; optional OTA copy to `orchestration/runtime/ota-artifacts/`.
+
+## Docker CI
+
+- Image version label: `00.BB.CC.DDDD` (see root `Dockerfile`).
+- Host wrapper: `scripts/docker-build-runner.sh`
+- In-container pipeline: `scripts/ci-build-and-publish-ota.sh`
+- OTA generator: `scripts/generate-ota-v0.sh [channel]`
+
+## CircleCI
+
+- Pipeline description: `build.config.yml`
+- Local CLI stub: `.circleci/config.yml` (`circleci config validate`)
+
+## Production notes
+
+- Mount builder PHP with Docker socket (build host only).
+- FE nginx: read-only OTA under `/v0/ota/`; BE RWX on artifact mount.
+- Keep `session_cookie_path` identical across all PHP apps behind the hub.
diff --git a/examples/app_hub/index.html b/examples/app_hub/index.html
index d0cad9e..d38455a 100644
--- a/examples/app_hub/index.html
+++ b/examples/app_hub/index.html
@@ -11,7 +11,7 @@
     })();
   </script>
   <link rel="stylesheet" href="/app/androidcast_project/crashes/assets/css/app.css">
-  <link rel="stylesheet" href="hub.css?v=20260530h">
+  <link rel="stylesheet" href="hub.css?v=20260530i">
   <link rel="stylesheet" href="hub-logo-layers.css">
   <script src="assets/analytics.config.js"></script>
   <script src="/app/androidcast_project/crashes/assets/js/analytics.js" defer></script>
@@ -122,10 +122,9 @@
         var dock = document.getElementById('hub-nav-dock');
         if (!dock) return;
         var globe = globeCoverRect();
-        var insetX = Math.max(16, globe.width * 0.06);
         var dockW = Math.min(300, Math.max(210, globe.width * 0.38));
         dock.style.width = dockW + 'px';
-        dock.style.left = (globe.left + insetX) + 'px';
+        dock.style.left = globe.left + 'px';
         dock.style.top = globe.top + 'px';
         dock.style.height = globe.height + 'px';
         dock.style.display = 'flex';
@@ -159,7 +158,7 @@
       var supportsLayout = !!(window.CSS && CSS.supports && CSS.supports('object-fit', 'cover'));
       if (!supportsSvg || !supportsLayout) return;
 
-      var logoBuild = '20260530h';
+      var logoBuild = '20260530i';
       var fragments = {
         space: 'assets/hub-logo-fragment-space.svg',
         globe: 'assets/hub-logo-fragment-globe.svg',
@@ -230,10 +229,9 @@
         var dock = document.getElementById('hub-nav-dock');
         if (!dock) return;
         var globe = globeCoverRect();
-        var insetX = Math.max(16, globe.width * 0.06);
         var dockW = Math.min(300, Math.max(210, globe.width * 0.38));
         dock.style.width = dockW + 'px';
-        dock.style.left = (globe.left + insetX) + 'px';
+        dock.style.left = globe.left + 'px';
         dock.style.top = globe.top + 'px';
         dock.style.height = globe.height + 'px';
         dock.style.right = 'auto';
diff --git a/examples/build_console/backend/config/config.example.php b/examples/build_console/backend/config/config.example.php
new file mode 100644
index 0000000..ec6e0e6
--- /dev/null
+++ b/examples/build_console/backend/config/config.example.php
@@ -0,0 +1,42 @@
+<?php
+return [
+    'app_name' => 'Android Cast Builder',
+    'base_path' => '/app/androidcast_project/build',
+    'session_name' => 'ac_crash_sess',
+    'session_cookie_path' => '/app/androidcast_project',
+    'db' => [
+        'driver' => 'mysql',
+        'sqlite_path' => __DIR__ . '/../../crash_reporter/backend/data/crashes.sqlite',
+        'mysql' => [
+            'host' => 'mariadb',
+            'port' => 3306,
+            'socket' => '',
+            'database' => 'androidcast_crashes',
+            'username' => 'androidcast',
+            'password' => 'androidcast',
+            'charset' => 'utf8mb4',
+        ],
+    ],
+    'debug' => true,
+    'rbac' => [
+        'default_company_slug' => 'default',
+        'default_company_id' => 1,
+    ],
+    'build' => [
+        'docker_image' => 'androidcast-ci:latest',
+        'ci_version' => '00.01.00.1000',
+        'repo_root' => '/workspace',
+        'artifacts_root' => '/workspace/out/builds',
+        'ota_mount' => '/workspace/orchestration/runtime/ota-artifacts',
+        'ota_base_url' => 'http://localhost:8080',
+        'runner_script' => '/workspace/scripts/docker-build-runner.sh',
+        'pipeline_config' => '/workspace/build.config.yml',
+        'default_channels' => ['stable', 'staging', 'dev', 'nightly'],
+    ],
+    'links' => [
+        'hub' => '/app/androidcast_project/',
+        'crashes' => '/app/androidcast_project/crashes/',
+        'git' => '/app/androidcast_project/git/',
+        'tickets' => '/app/androidcast_project/crashes/?view=tickets',
+    ],
+];
diff --git a/examples/build_console/backend/public/api/build_log.php b/examples/build_console/backend/public/api/build_log.php
new file mode 100644
index 0000000..a6ff7c3
--- /dev/null
+++ b/examples/build_console/backend/public/api/build_log.php
@@ -0,0 +1,24 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+Auth::check();
+
+$id = (int) ($_GET['id'] ?? 0);
+$offset = (int) ($_GET['offset'] ?? 0);
+if ($id <= 0) {
+    json_out(['ok' => false, 'error' => 'id required'], 400);
+}
+$build = BuildRepository::getById($id);
+if (!$build) {
+    json_out(['ok' => false, 'error' => 'not found'], 404);
+}
+$tail = BuildRunner::readLogTail($build['log_path'] ?? null, $offset);
+if ($build['status'] === 'running' && $tail['eof'] && is_file(BuildRunner::artifactDir($id) . '/BUILD_INFO.json')) {
+    BuildRunner::finalizeFromArtifacts($id);
+    $build = BuildRepository::getById($id);
+}
+json_out([
+    'ok' => true,
+    'build' => $build,
+    'log' => $tail,
+]);
diff --git a/examples/build_console/backend/public/api/build_trigger.php b/examples/build_console/backend/public/api/build_trigger.php
new file mode 100644
index 0000000..3dd302a
--- /dev/null
+++ b/examples/build_console/backend/public/api/build_trigger.php
@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+Auth::check();
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    json_out(['ok' => false, 'error' => 'POST required'], 405);
+}
+
+$raw = file_get_contents('php://input') ?: '{}';
+$params = json_decode($raw, true);
+if (!is_array($params)) {
+    $params = $_POST;
+}
+
+$pipelinePath = (string) cfg('build.pipeline_config', '/workspace/build.config.yml');
+$params['pipeline_yaml'] = is_file($pipelinePath) ? (string) file_get_contents($pipelinePath) : null;
+$params['run_tests'] = !empty($params['run_tests']);
+$params['run_native'] = array_key_exists('run_native', $params) ? !empty($params['run_native']) : true;
+$params['run_apk'] = array_key_exists('run_apk', $params) ? !empty($params['run_apk']) : true;
+$params['auto_ota'] = !empty($params['auto_ota']);
+$params['auto_deploy'] = !empty($params['auto_deploy']);
+$params['ota_channel'] = $params['ota_channel'] ?? 'staging';
+$params['gradle_task'] = $params['gradle_task'] ?? 'assembleDebug';
+
+$user = Auth::user();
+$build = BuildRunner::enqueue($params, isset($user['id']) ? (int) $user['id'] : null);
+json_out(['ok' => true, 'build' => $build]);
diff --git a/examples/build_console/backend/public/api/builds.php b/examples/build_console/backend/public/api/builds.php
new file mode 100644
index 0000000..482f1a7
--- /dev/null
+++ b/examples/build_console/backend/public/api/builds.php
@@ -0,0 +1,5 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+Auth::check();
+json_out(['ok' => true, 'builds' => BuildRepository::listRecent(10)]);
diff --git a/examples/build_console/backend/public/api/health.php b/examples/build_console/backend/public/api/health.php
new file mode 100644
index 0000000..e289d91
--- /dev/null
+++ b/examples/build_console/backend/public/api/health.php
@@ -0,0 +1,4 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../../src/bootstrap.php';
+json_out(['ok' => true, 'health' => BuildRepository::healthSummary()]);
diff --git a/examples/build_console/backend/public/assets/js/builder.js b/examples/build_console/backend/public/assets/js/builder.js
new file mode 100644
index 0000000..81102f9
--- /dev/null
+++ b/examples/build_console/backend/public/assets/js/builder.js
@@ -0,0 +1,74 @@
+(function () {
+  'use strict';
+  var base = document.body.getAttribute('data-base-path') || '';
+  var themeSel = document.getElementById('theme-select');
+  if (themeSel) {
+    var cur = localStorage.getItem('crash_console_theme') || 'dark';
+    themeSel.value = cur;
+    themeSel.addEventListener('change', function () {
+      document.documentElement.setAttribute('data-theme', themeSel.value);
+      localStorage.setItem('crash_console_theme', themeSel.value);
+    });
+  }
+
+  var form = document.getElementById('build-trigger-form');
+  if (form) {
+    form.addEventListener('submit', function (ev) {
+      ev.preventDefault();
+      var status = document.getElementById('build-trigger-status');
+      var fd = new FormData(form);
+      var payload = {
+        git_ref: fd.get('git_ref') || 'next',
+        gradle_task: fd.get('gradle_task') || 'assembleDebug',
+        ota_channel: fd.get('ota_channel') || 'staging',
+        run_tests: !!form.querySelector('[name=run_tests]').checked,
+        run_native: !!form.querySelector('[name=run_native]').checked,
+        run_apk: !!form.querySelector('[name=run_apk]').checked,
+        auto_ota: !!form.querySelector('[name=auto_ota]').checked,
+        auto_deploy: !!form.querySelector('[name=auto_deploy]').checked
+      };
+      status.textContent = 'Starting…';
+      fetch(base + '/api/build_trigger.php', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(payload)
+      }).then(function (r) { return r.json(); }).then(function (j) {
+        if (j.ok && j.build && j.build.id) {
+          window.location.href = base + '/?view=build&id=' + j.build.id;
+        } else {
+          status.textContent = j.error || 'Failed';
+        }
+      }).catch(function () { status.textContent = 'Network error'; });
+    });
+  }
+
+  var buildId = document.body.getAttribute('data-build-id');
+  var logEl = document.getElementById('build-log-tail');
+  if (buildId && logEl) {
+    var offset = 0;
+    var full = '';
+    function poll() {
+      fetch(base + '/api/build_log.php?id=' + encodeURIComponent(buildId) + '&offset=' + offset)
+        .then(function (r) { return r.json(); })
+        .then(function (j) {
+          if (!j.ok) return;
+          if (j.log && j.log.text) {
+            full += j.log.text;
+            offset = j.log.offset || offset;
+            logEl.textContent = full.slice(-12000);
+            logEl.scrollTop = logEl.scrollHeight;
+          }
+          if (j.build && j.build.status === 'running') {
+            setTimeout(poll, 1000);
+          }
+        }).catch(function () { setTimeout(poll, 2000); });
+    }
+    poll();
+    var expand = document.getElementById('build-log-expand');
+    if (expand) {
+      expand.addEventListener('click', function () {
+        logEl.textContent = full;
+      });
+    }
+  }
+})();
diff --git a/examples/build_console/backend/public/index.php b/examples/build_console/backend/public/index.php
new file mode 100644
index 0000000..e7e88c3
--- /dev/null
+++ b/examples/build_console/backend/public/index.php
@@ -0,0 +1,77 @@
+<?php
+declare(strict_types=1);
+require_once __DIR__ . '/../src/bootstrap.php';
+
+$uri = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?: '/';
+$base = Auth::basePath();
+if ($base !== '' && str_starts_with($uri, $base)) {
+    $uri = substr($uri, strlen($base)) ?: '/';
+}
+$route = rtrim($uri, '/') ?: '/';
+
+if ($route === '/api/health.php' || str_ends_with($route, '/api/health.php')) {
+    require __DIR__ . '/api/health.php';
+    exit;
+}
+if ($route === '/api/builds.php' || str_ends_with($route, '/api/builds.php')) {
+    require __DIR__ . '/api/builds.php';
+    exit;
+}
+if ($route === '/api/build_trigger.php' || str_ends_with($route, '/api/build_trigger.php')) {
+    require __DIR__ . '/api/build_trigger.php';
+    exit;
+}
+if ($route === '/api/build_log.php' || str_ends_with($route, '/api/build_log.php')) {
+    require __DIR__ . '/api/build_log.php';
+    exit;
+}
+
+if ($route === '/logout') {
+    Auth::logout();
+    header('Location: ' . $base . '/login');
+    exit;
+}
+
+if ($route === '/login' && $_SERVER['REQUEST_METHOD'] === 'POST') {
+    $user = trim($_POST['username'] ?? '');
+    $pass = $_POST['password'] ?? '';
+    if (Auth::login($user, $pass)) {
+        header('Location: ' . $base . '/');
+        exit;
+    }
+    $loginError = 'Invalid credentials';
+    require __DIR__ . '/../views/login.php';
+    exit;
+}
+
+if ($route === '/login') {
+    require __DIR__ . '/../views/login.php';
+    exit;
+}
+
+Auth::check();
+
+$view = $_GET['view'] ?? 'home';
+
+if ($view === 'build' && isset($_GET['id'])) {
+    $build = BuildRepository::getById((int) $_GET['id']);
+    if (!$build) {
+        http_response_code(404);
+        echo 'Not found';
+        exit;
+    }
+    if ($build['status'] === 'running' && is_file(BuildRunner::artifactDir((int) $build['id']) . '/android_cast-latest.apk')) {
+        BuildRunner::finalizeFromArtifacts((int) $build['id']);
+        $build = BuildRepository::getById((int) $_GET['id']);
+    }
+    $view = 'build';
+    $pageTitle = 'Build ' . ($build['build_code'] ?? '');
+    require __DIR__ . '/../views/layout.php';
+    exit;
+}
+
+$view = 'home';
+$health = BuildRepository::healthSummary();
+$builds = BuildRepository::listRecent(10);
+$pageTitle = 'Builder';
+require __DIR__ . '/../views/layout.php';
diff --git a/examples/build_console/backend/src/BuildRepository.php b/examples/build_console/backend/src/BuildRepository.php
new file mode 100644
index 0000000..6b0e9c0
--- /dev/null
+++ b/examples/build_console/backend/src/BuildRepository.php
@@ -0,0 +1,127 @@
+<?php
+declare(strict_types=1);
+
+final class BuildRepository {
+    public static function ensureSchema(): void {
+        $pdo = Database::pdo();
+        $pdo->exec(<<<'SQL'
+CREATE TABLE IF NOT EXISTS builds (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    build_code VARCHAR(64) NOT NULL,
+    status ENUM('queued','running','passed','failed','cancelled') NOT NULL DEFAULT 'queued',
+    phase VARCHAR(64) NOT NULL DEFAULT 'init',
+    git_ref VARCHAR(256) NULL,
+    git_sha VARCHAR(64) NULL,
+    branch VARCHAR(128) NULL,
+    pipeline_yaml LONGTEXT NULL,
+    params_json LONGTEXT NOT NULL,
+    dockerfile_version VARCHAR(32) NOT NULL DEFAULT '00.01.00.1000',
+    builder_id VARCHAR(128) NOT NULL DEFAULT 'local-docker',
+    version_app VARCHAR(32) NULL,
+    version_code INT NULL,
+    target_os VARCHAR(32) NOT NULL DEFAULT 'android',
+    min_api_level INT NOT NULL DEFAULT 24,
+    ota_channel VARCHAR(64) NULL,
+    auto_ota TINYINT(1) NOT NULL DEFAULT 0,
+    auto_deploy TINYINT(1) NOT NULL DEFAULT 0,
+    log_path VARCHAR(512) NULL,
+    artifacts_json LONGTEXT NULL,
+    error_message VARCHAR(512) NULL,
+    created_by_user_id INT UNSIGNED NULL,
+    started_at TIMESTAMP NULL,
+    finished_at TIMESTAMP NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE KEY uq_builds_code (build_code),
+    KEY idx_builds_status (status),
+    KEY idx_builds_created (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+SQL);
+    }
+
+    public static function create(array $row): int {
+        self::ensureSchema();
+        $pdo = Database::pdo();
+        $stmt = $pdo->prepare(<<<'SQL'
+INSERT INTO builds (
+    build_code, status, phase, git_ref, git_sha, branch, pipeline_yaml, params_json,
+    dockerfile_version, builder_id, target_os, min_api_level, ota_channel, auto_ota, auto_deploy,
+    log_path, created_by_user_id
+) VALUES (
+    :build_code, :status, :phase, :git_ref, :git_sha, :branch, :pipeline_yaml, :params_json,
+    :dockerfile_version, :builder_id, :target_os, :min_api_level, :ota_channel, :auto_ota, :auto_deploy,
+    :log_path, :created_by_user_id
+)
+SQL);
+        $stmt->execute([
+            ':build_code' => $row['build_code'],
+            ':status' => $row['status'] ?? 'queued',
+            ':phase' => $row['phase'] ?? 'queued',
+            ':git_ref' => $row['git_ref'] ?? null,
+            ':git_sha' => $row['git_sha'] ?? null,
+            ':branch' => $row['branch'] ?? null,
+            ':pipeline_yaml' => $row['pipeline_yaml'] ?? null,
+            ':params_json' => $row['params_json'] ?? '{}',
+            ':dockerfile_version' => $row['dockerfile_version'] ?? '00.01.00.1000',
+            ':builder_id' => $row['builder_id'] ?? 'local-docker',
+            ':target_os' => $row['target_os'] ?? 'android',
+            ':min_api_level' => (int) ($row['min_api_level'] ?? 24),
+            ':ota_channel' => $row['ota_channel'] ?? null,
+            ':auto_ota' => !empty($row['auto_ota']) ? 1 : 0,
+            ':auto_deploy' => !empty($row['auto_deploy']) ? 1 : 0,
+            ':log_path' => $row['log_path'] ?? null,
+            ':created_by_user_id' => $row['created_by_user_id'] ?? null,
+        ]);
+        return (int) $pdo->lastInsertId();
+    }
+
+    public static function update(int $id, array $fields): void {
+        self::ensureSchema();
+        $allowed = ['status', 'phase', 'version_app', 'version_code', 'artifacts_json', 'error_message', 'started_at', 'finished_at', 'git_sha', 'log_path'];
+        $sets = [];
+        $params = [':id' => $id];
+        foreach ($fields as $k => $v) {
+            if (!in_array($k, $allowed, true)) {
+                continue;
+            }
+            $sets[] = "$k = :$k";
+            $params[":$k"] = $v;
+        }
+        if (!$sets) {
+            return;
+        }
+        $sql = 'UPDATE builds SET ' . implode(', ', $sets) . ' WHERE id = :id';
+        Database::pdo()->prepare($sql)->execute($params);
+    }
+
+    public static function getById(int $id): ?array {
+        self::ensureSchema();
+        $stmt = Database::pdo()->prepare('SELECT * FROM builds WHERE id = ? LIMIT 1');
+        $stmt->execute([$id]);
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+
+    public static function listRecent(int $limit = 10): array {
+        self::ensureSchema();
+        $stmt = Database::pdo()->prepare('SELECT * FROM builds ORDER BY id DESC LIMIT ?');
+        $stmt->bindValue(1, $limit, PDO::PARAM_INT);
+        $stmt->execute();
+        return $stmt->fetchAll() ?: [];
+    }
+
+    public static function healthSummary(): array {
+        self::ensureSchema();
+        $pdo = Database::pdo();
+        $running = (int) $pdo->query("SELECT COUNT(*) FROM builds WHERE status = 'running'")->fetchColumn();
+        $failed = (int) $pdo->query("SELECT COUNT(*) FROM builds WHERE status = 'failed' AND created_at > (NOW() - INTERVAL 7 DAY)")->fetchColumn();
+        $passed = (int) $pdo->query("SELECT COUNT(*) FROM builds WHERE status = 'passed' AND created_at > (NOW() - INTERVAL 7 DAY)")->fetchColumn();
+        $dockerOk = trim((string) shell_exec('docker info >/dev/null 2>&1 && echo ok')) === 'ok';
+        return [
+            'docker' => $dockerOk ? 'ok' : 'down',
+            'running' => $running,
+            'passed_7d' => $passed,
+            'failed_7d' => $failed,
+            'ci_version' => cfg('build.ci_version', '00.01.00.1000'),
+        ];
+    }
+}
diff --git a/examples/build_console/backend/src/BuildRunner.php b/examples/build_console/backend/src/BuildRunner.php
new file mode 100644
index 0000000..b75591c
--- /dev/null
+++ b/examples/build_console/backend/src/BuildRunner.php
@@ -0,0 +1,137 @@
+<?php
+declare(strict_types=1);
+
+final class BuildRunner {
+    public static function generateBuildCode(): string {
+        return 'bld-' . gmdate('Ymd-His') . '-' . substr(bin2hex(random_bytes(3)), 0, 6);
+    }
+
+    public static function artifactDir(int $buildId): string {
+        $root = rtrim((string) cfg('build.artifacts_root', '/workspace/out/builds'), '/');
+        return $root . '/' . $buildId;
+    }
+
+    public static function enqueue(array $params, ?int $userId): array {
+        BuildRepository::ensureSchema();
+        $buildCode = self::generateBuildCode();
+        $id = BuildRepository::create([
+            'build_code' => $buildCode,
+            'status' => 'queued',
+            'phase' => 'queued',
+            'git_ref' => $params['git_ref'] ?? null,
+            'git_sha' => $params['git_sha'] ?? null,
+            'branch' => $params['branch'] ?? null,
+            'pipeline_yaml' => $params['pipeline_yaml'] ?? null,
+            'params_json' => json_encode($params, JSON_UNESCAPED_SLASHES),
+            'dockerfile_version' => cfg('build.ci_version', '00.01.00.1000'),
+            'builder_id' => gethostname() ?: 'builder',
+            'ota_channel' => $params['ota_channel'] ?? 'staging',
+            'auto_ota' => !empty($params['auto_ota']),
+            'auto_deploy' => !empty($params['auto_deploy']),
+            'created_by_user_id' => $userId,
+        ]);
+        $dir = self::artifactDir($id);
+        if (!is_dir($dir) && !mkdir($dir, 0775, true) && !is_dir($dir)) {
+            throw new RuntimeException('Cannot create artifact dir: ' . $dir);
+        }
+        $logPath = $dir . '/build.log';
+        BuildRepository::update($id, [
+            'log_path' => $logPath,
+            'status' => 'running',
+            'phase' => 'docker',
+            'started_at' => gmdate('Y-m-d H:i:s'),
+        ]);
+
+        $runner = (string) cfg('build.runner_script', '/workspace/scripts/docker-build-runner.sh');
+        $repo = (string) cfg('build.repo_root', '/workspace');
+        $env = [
+            'BUILD_ID=' . $id,
+            'BUILD_LOG_FILE=' . escapeshellarg($logPath),
+            'BUILD_WORK_DIR=' . escapeshellarg($repo),
+            'BUILD_OUT_DIR=' . escapeshellarg($dir),
+            'ANDROIDCAST_CI_VERSION=' . escapeshellarg((string) cfg('build.ci_version', '00.01.00.1000')),
+            'GIT_REF=' . escapeshellarg((string) ($params['git_ref'] ?? '')),
+            'GIT_SHA=' . escapeshellarg((string) ($params['git_sha'] ?? '')),
+            'GRADLE_TASK=' . escapeshellarg((string) ($params['gradle_task'] ?? 'assembleDebug')),
+            'RUN_UNIT_TESTS=' . (!empty($params['run_tests']) ? '1' : '0'),
+            'RUN_NATIVE=' . (!empty($params['run_native']) ? '1' : '0'),
+            'RUN_APK=' . (!empty($params['run_apk']) ? '1' : '0'),
+            'OTA_BASE_URL=' . escapeshellarg((string) ($params['ota_base_url'] ?? cfg('build.ota_base_url', ''))),
+            'OTA_CHANNEL=' . escapeshellarg((string) ($params['ota_channel'] ?? 'staging')),
+            'AUTO_OTA=' . (!empty($params['auto_ota']) ? '1' : '0'),
+        ];
+        $cmd = implode(' ', $env) . ' nohup ' . escapeshellarg($runner) . ' >> ' . escapeshellarg($logPath) . ' 2>&1 & echo $!';
+        $pid = trim((string) shell_exec($cmd));
+        file_put_contents($dir . '/runner.pid', $pid);
+
+        return BuildRepository::getById($id) ?? ['id' => $id, 'build_code' => $buildCode];
+    }
+
+    public static function readLogTail(?string $logPath, int $offset = 0, int $maxBytes = 65536): array {
+        if (!$logPath || !is_file($logPath)) {
+            return ['offset' => 0, 'eof' => true, 'text' => ''];
+        }
+        $size = filesize($logPath) ?: 0;
+        $offset = max(0, min($offset, $size));
+        $fh = fopen($logPath, 'rb');
+        if (!$fh) {
+            return ['offset' => $offset, 'eof' => true, 'text' => ''];
+        }
+        fseek($fh, $offset);
+        $chunk = fread($fh, $maxBytes) ?: '';
+        $newOffset = $offset + strlen($chunk);
+        fclose($fh);
+        return ['offset' => $newOffset, 'eof' => $newOffset >= $size, 'text' => $chunk];
+    }
+
+    public static function finalizeFromArtifacts(int $buildId): void {
+        $dir = self::artifactDir($buildId);
+        $infoPath = $dir . '/BUILD_INFO.json';
+        $status = is_file($dir . '/android_cast-latest.apk') ? 'passed' : 'failed';
+        $artifacts = [];
+        if (is_file($dir . '/android_cast-latest.apk')) {
+            $artifacts['apk'] = 'android_cast-latest.apk';
+        }
+        if (is_dir($dir . '/ota/v0')) {
+            $artifacts['ota'] = 'ota/v0';
+        }
+        $versionApp = null;
+        if (is_file($infoPath)) {
+            $info = json_decode((string) file_get_contents($infoPath), true);
+            if (is_array($info)) {
+                $versionApp = $info['gitSha'] ?? null;
+            }
+        }
+        BuildRepository::update($buildId, [
+            'status' => $status,
+            'phase' => 'done',
+            'artifacts_json' => json_encode($artifacts, JSON_UNESCAPED_SLASHES),
+            'version_app' => $versionApp,
+            'finished_at' => gmdate('Y-m-d H:i:s'),
+        ]);
+        if (!empty($artifacts['ota']) && cfg('build.ota_mount')) {
+            $build = BuildRepository::getById($buildId);
+            if (!empty($build['auto_deploy'])) {
+                self::publishOta($buildId, $dir);
+            }
+        }
+    }
+
+    private static function publishOta(int $buildId, string $dir): void {
+        $mount = rtrim((string) cfg('build.ota_mount', ''), '/');
+        if ($mount === '' || !is_dir($mount)) {
+            return;
+        }
+        $src = $dir . '/ota/v0';
+        if (!is_dir($src)) {
+            return;
+        }
+        $build = BuildRepository::getById($buildId);
+        $channel = $build['ota_channel'] ?? 'staging';
+        $dest = $mount . '/v0';
+        shell_exec('mkdir -p ' . escapeshellarg($dest) . ' && cp -a ' . escapeshellarg($src . '/.') . ' ' . escapeshellarg($dest . '/'));
+        if ($channel !== '' && $channel !== 'staging') {
+            shell_exec('cp -a ' . escapeshellarg($src . '/ota/channel/' . $channel . '.json') . ' ' . escapeshellarg($dest . '/ota/channel/' . $channel . '.json 2>/dev/null'));
+        }
+    }
+}
diff --git a/examples/build_console/backend/src/bootstrap.php b/examples/build_console/backend/src/bootstrap.php
new file mode 100644
index 0000000..676269f
--- /dev/null
+++ b/examples/build_console/backend/src/bootstrap.php
@@ -0,0 +1,54 @@
+<?php
+declare(strict_types=1);
+
+require_once dirname(__DIR__, 2) . '/platform/shared_session.php';
+
+$crashSrc = dirname(__DIR__, 2) . '/crash_reporter/backend/src';
+$configPath = __DIR__ . '/../config/config.php';
+if (!is_file($configPath)) {
+    $configPath = __DIR__ . '/../config/config.example.php';
+}
+$config = require $configPath;
+
+platform_start_session(
+    $config['session_name'] ?? 'ac_crash_sess',
+    $config['session_cookie_path'] ?? '/app/androidcast_project'
+);
+
+foreach (['Database.php', 'Rbac.php', 'Auth.php', 'UserRepository.php', 'AnalyticsHead.php'] as $f) {
+    require_once $crashSrc . '/' . $f;
+}
+
+require_once __DIR__ . '/BuildRepository.php';
+require_once __DIR__ . '/BuildRunner.php';
+
+function cfg(string $key, $default = null) {
+    global $config;
+    $parts = explode('.', $key);
+    $v = $config;
+    foreach ($parts as $p) {
+        if (!is_array($v) || !array_key_exists($p, $v)) {
+            return $default;
+        }
+        $v = $v[$p];
+    }
+    return $v;
+}
+
+function h(mixed $s): string {
+    if ($s === null || $s === false) {
+        return '';
+    }
+    return htmlspecialchars((string) $s, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+}
+
+function json_out(array $data, int $code = 200): void {
+    http_response_code($code);
+    header('Content-Type: application/json; charset=utf-8');
+    echo json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+    exit;
+}
+
+function assets_base(): string {
+    return rtrim((string) cfg('links.crashes', '/app/androidcast_project/crashes/'), '/');
+}
diff --git a/examples/build_console/backend/views/build_detail.php b/examples/build_console/backend/views/build_detail.php
new file mode 100644
index 0000000..d982134
--- /dev/null
+++ b/examples/build_console/backend/views/build_detail.php
@@ -0,0 +1,40 @@
+<?php declare(strict_types=1);
+$artifacts = json_decode($build['artifacts_json'] ?? '{}', true) ?: [];
+$params = json_decode($build['params_json'] ?? '{}', true) ?: [];
+?>
+<h1>Build <?= h($build['build_code'] ?? '') ?></h1>
+<p class="muted">Status: <strong><?= h($build['status'] ?? '') ?></strong> · Phase: <?= h($build['phase'] ?? '') ?></p>
+
+<div class="detail-grid card card--lift">
+  <dl>
+    <dt>Builder</dt><dd><?= h($build['builder_id'] ?? '') ?></dd>
+    <dt>CI image</dt><dd><code><?= h($build['dockerfile_version'] ?? '') ?></code></dd>
+    <dt>Target OS</dt><dd><?= h($build['target_os'] ?? 'android') ?> (min API <?= (int) ($build['min_api_level'] ?? 24) ?>)</dd>
+    <dt>Git ref</dt><dd><code><?= h($build['git_ref'] ?? '—') ?></code></dd>
+    <dt>Git SHA</dt><dd><code><?= h($build['git_sha'] ?? '—') ?></code></dd>
+    <dt>OTA channel</dt><dd><?= h($build['ota_channel'] ?? '—') ?></dd>
+    <dt>Gradle task</dt><dd><code><?= h($params['gradle_task'] ?? '—') ?></code></dd>
+  </dl>
+</div>
+
+<?php if ($artifacts): ?>
+<section class="card card--lift">
+  <h2>Artifacts</h2>
+  <ul>
+    <?php foreach ($artifacts as $k => $v): ?>
+      <li><strong><?= h($k) ?>:</strong> <code><?= h((string) $v) ?></code></li>
+    <?php endforeach; ?>
+  </ul>
+</section>
+<?php endif; ?>
+
+<section class="card card--lift">
+  <h2>Pipeline (YAML)</h2>
+  <pre class="log-preview"><?= h($build['pipeline_yaml'] ?? '(none)') ?></pre>
+</section>
+
+<section class="card card--lift">
+  <h2>Build log</h2>
+  <pre id="build-log-tail" class="log-preview log-preview--live" aria-live="polite"></pre>
+  <button type="button" class="btn" id="build-log-expand">Show full log</button>
+</section>
diff --git a/examples/build_console/backend/views/home.php b/examples/build_console/backend/views/home.php
new file mode 100644
index 0000000..b5a6895
--- /dev/null
+++ b/examples/build_console/backend/views/home.php
@@ -0,0 +1,68 @@
+<?php declare(strict_types=1); ?>
+<h1>Android Cast Builder</h1>
+<p class="muted">Docker CI for APK baking, OTA staging, and pipeline history.</p>
+
+<section class="card card--lift" style="margin-bottom:16px">
+  <h2>Ecosystem health</h2>
+  <ul>
+    <li>Docker: <strong><?= h($health['docker'] ?? 'unknown') ?></strong></li>
+    <li>CI image version: <code><?= h($health['ci_version'] ?? '') ?></code></li>
+    <li>Running builds: <?= (int) ($health['running'] ?? 0) ?></li>
+    <li>Passed (7d): <?= (int) ($health['passed_7d'] ?? 0) ?> · Failed (7d): <?= (int) ($health['failed_7d'] ?? 0) ?></li>
+  </ul>
+</section>
+
+<section class="card card--lift" id="build-trigger-panel">
+  <h2>Run pipeline</h2>
+  <form id="build-trigger-form" class="build-form">
+    <div class="build-form-grid">
+      <label>Git ref (branch / tag / commit)<input name="git_ref" placeholder="next" value="next"></label>
+      <label>Gradle task<input name="gradle_task" value="assembleDebug"></label>
+      <label>OTA channel<select name="ota_channel">
+        <option value="staging" selected>staging</option>
+        <option value="dev">dev</option>
+        <option value="nightly">nightly</option>
+        <option value="stable">stable / prod</option>
+      </select></label>
+    </div>
+    <div class="build-form-checks">
+      <label><input type="checkbox" name="run_tests" checked> Unit tests</label>
+      <label><input type="checkbox" name="run_native" checked> Native codecs</label>
+      <label><input type="checkbox" name="run_apk" checked> APK output</label>
+      <label><input type="checkbox" name="auto_ota"> Create OTA artifacts</label>
+      <label><input type="checkbox" name="auto_deploy"> Publish OTA to mount</label>
+    </div>
+    <button type="submit" class="btn btn-primary">Start build</button>
+    <span id="build-trigger-status" class="muted"></span>
+  </form>
+</section>
+
+<section class="card card--lift">
+  <h2>Recent builds (last 10)</h2>
+  <div class="reports-table-wrap">
+    <table class="data-table">
+      <thead>
+        <tr>
+          <th>Code</th>
+          <th>Status</th>
+          <th>Phase</th>
+          <th>Branch/ref</th>
+          <th>Channel</th>
+          <th>Created</th>
+        </tr>
+      </thead>
+      <tbody>
+        <?php foreach ($builds as $b): ?>
+        <tr>
+          <td><a href="<?= h(Auth::basePath()) ?>/?view=build&id=<?= (int) $b['id'] ?>"><?= h($b['build_code']) ?></a></td>
+          <td><?= h($b['status']) ?></td>
+          <td><?= h($b['phase']) ?></td>
+          <td><?= h($b['git_ref'] ?? $b['branch'] ?? '—') ?></td>
+          <td><?= h($b['ota_channel'] ?? '—') ?></td>
+          <td><?= h($b['created_at'] ?? '') ?></td>
+        </tr>
+        <?php endforeach; ?>
+      </tbody>
+    </table>
+  </div>
+</section>
diff --git a/examples/build_console/backend/views/layout.php b/examples/build_console/backend/views/layout.php
new file mode 100644
index 0000000..0c7b94c
--- /dev/null
+++ b/examples/build_console/backend/views/layout.php
@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+$ab = assets_base();
+$links = cfg('links', []);
+?>
+<!DOCTYPE html>
+<html lang="en" data-theme="dark">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title><?= h($pageTitle ?? 'Builder') ?> — <?= h(cfg('app_name')) ?></title>
+  <script>
+    (function () {
+      var t = localStorage.getItem('crash_console_theme');
+      if (t === 'light' || t === 'dark') document.documentElement.setAttribute('data-theme', t);
+      var l = localStorage.getItem('crash_console_lang');
+      if (l === 'en' || l === 'ru') document.documentElement.setAttribute('lang', l);
+    })();
+  </script>
+  <link rel="stylesheet" href="<?= h($ab) ?>/assets/css/app.css">
+  <script src="<?= h($ab) ?>/assets/js/i18n.js" defer></script>
+  <script src="<?= h(Auth::basePath()) ?>/assets/js/builder.js" defer></script>
+</head>
+<body data-base-path="<?= h(Auth::basePath()) ?>"
+      data-view="<?= h($view ?? 'home') ?>"
+      <?= (($view ?? '') === 'build' && !empty($build['id'])) ? ' data-build-id="' . (int) $build['id'] . '"' : '' ?>>
+  <div class="shell">
+    <nav class="nav-pane" id="nav-pane" aria-label="Builder navigation">
+      <button type="button" class="nav-handle" id="nav-handle" aria-label="Toggle navigation">
+        <span class="nav-icon nav-icon--menu" aria-hidden="true"></span>
+      </button>
+      <ul class="nav-list">
+        <li><a href="<?= h(Auth::basePath()) ?>/" class="nav-link <?= ($view ?? '') === 'home' ? 'active' : '' ?>"><span class="nav-icon nav-icon--home"></span><span class="nav-label">Builder</span></a></li>
+        <li><a href="<?= h($links['crashes'] ?? '') ?>?view=reports" class="nav-link"><span class="nav-icon nav-icon--reports"></span><span class="nav-label">Crashes</span></a></li>
+        <li><a href="<?= h($links['tickets'] ?? '') ?>" class="nav-link"><span class="nav-icon nav-icon--tickets"></span><span class="nav-label">Tickets</span></a></li>
+        <li><a href="<?= h($links['git'] ?? '') ?>" class="nav-link"><span class="nav-icon nav-icon--git"></span><span class="nav-label">Git</span></a></li>
+        <li><a href="<?= h($links['hub'] ?? '') ?>" class="nav-link"><span class="nav-icon nav-icon--home"></span><span class="nav-label">Hub</span></a></li>
+      </ul>
+      <div class="nav-locale">
+        <label class="toolbar-select"><span>Theme</span>
+          <select id="theme-select" aria-label="UI theme"><option value="dark">Dark</option><option value="light">Light</option></select>
+        </label>
+      </div>
+      <div class="nav-user">
+        <span class="nav-user-name"><?= h(Auth::user()['username'] ?? '') ?></span>
+        <a href="<?= h(Auth::basePath()) ?>/logout" class="nav-link nav-link--logout">Logout</a>
+      </div>
+    </nav>
+    <main class="main-pane">
+      <?php if (($view ?? '') === 'build' && !empty($build)): ?>
+        <?php require __DIR__ . '/build_detail.php'; ?>
+      <?php else: ?>
+        <?php require __DIR__ . '/home.php'; ?>
+      <?php endif; ?>
+    </main>
+  </div>
+  <footer class="bottom-bar">(c) Anton Afanaasyeu, <?= (int) date('Y') ?></footer>
+</body>
+</html>
diff --git a/examples/build_console/backend/views/login.php b/examples/build_console/backend/views/login.php
new file mode 100644
index 0000000..a3141ba
--- /dev/null
+++ b/examples/build_console/backend/views/login.php
@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+$bp = Auth::basePath();
+$ab = assets_base();
+?>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Login — <?= h(cfg('app_name')) ?></title>
+  <link rel="stylesheet" href="<?= h($ab) ?>/assets/css/app.css">
+</head>
+<body class="login-page">
+  <form class="login-card" method="post" action="<?= h($bp) ?>/login">
+    <h1><?= h(cfg('app_name')) ?></h1>
+    <p class="muted">Sign in (same credentials as Crashes / Tickets)</p>
+    <?php if (!empty($loginError)): ?>
+      <div class="alert"><?= h($loginError) ?></div>
+    <?php endif; ?>
+    <label><span>Username</span><input name="username" autocomplete="username" required></label>
+    <label><span>Password</span><input name="password" type="password" autocomplete="current-password" required></label>
+    <button type="submit">Sign in</button>
+  </form>
+</body>
+</html>
diff --git a/examples/crash_reporter/backend/config/config.example.php b/examples/crash_reporter/backend/config/config.example.php
index f2a7347..34ba5d8 100644
--- a/examples/crash_reporter/backend/config/config.example.php
+++ b/examples/crash_reporter/backend/config/config.example.php
@@ -30,6 +30,8 @@ return [
         ],
     ],
     'session_name' => 'ac_crash_sess',
+    // Shared login cookie across crashes, build, and other consoles under this path
+    'session_cookie_path' => '/app/androidcast_project',
     // When true, upload API may include a short error hint (do not enable on public prod long-term)
     'debug' => false,
     // Phase 1 RBAC: anonymous uploads and legacy rows attach to this company
diff --git a/examples/crash_reporter/backend/src/bootstrap.php b/examples/crash_reporter/backend/src/bootstrap.php
index 59673a4..d3cf85c 100644
--- a/examples/crash_reporter/backend/src/bootstrap.php
+++ b/examples/crash_reporter/backend/src/bootstrap.php
@@ -12,6 +12,8 @@
  */
 declare(strict_types=1);
 
+require_once dirname(__DIR__, 2) . '/platform/shared_session.php';
+
 if (!function_exists('session_start')) {
     http_response_code(500);
     header('Content-Type: text/plain; charset=utf-8');
@@ -27,10 +29,7 @@ if (!is_file($configPath)) {
 }
 $config = require $configPath;
 
-session_name($config['session_name'] ?? 'ac_crash_sess');
-if (session_status() !== PHP_SESSION_ACTIVE) {
-    session_start();
-}
+platform_start_session($config['session_name'] ?? 'ac_crash_sess', $config['session_cookie_path'] ?? '/app/androidcast_project');
 
 require_once __DIR__ . '/Database.php';
 require_once __DIR__ . '/Rbac.php';
diff --git a/examples/crash_reporter/backend/views/layout.php b/examples/crash_reporter/backend/views/layout.php
index b7dfa69..6258311 100644
--- a/examples/crash_reporter/backend/views/layout.php
+++ b/examples/crash_reporter/backend/views/layout.php
@@ -75,6 +75,15 @@
             <span class="nav-label" data-i18n="nav.tickets">Tickets</span>
           </a>
         </li>
+        <li>
+          <a href="/app/androidcast_project/build/"
+             class="nav-link"
+             aria-label="Builder"
+             title="Builder">
+            <span class="nav-icon nav-icon--git" aria-hidden="true"></span>
+            <span class="nav-label">Builder</span>
+          </a>
+        </li>
       </ul>
       <div class="nav-locale">
         <div class="locale-picker" data-i18n-title="lang.label" title="Language">
diff --git a/examples/platform/shared_session.php b/examples/platform/shared_session.php
new file mode 100644
index 0000000..0de7b19
--- /dev/null
+++ b/examples/platform/shared_session.php
@@ -0,0 +1,22 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Shared session for all Android Cast web consoles (crashes, build, …).
+ * Same cookie path + session name => one login across sub-apps.
+ */
+function platform_start_session(string $sessionName = 'ac_crash_sess', string $cookiePath = '/app/androidcast_project'): void
+{
+    if (session_status() === PHP_SESSION_ACTIVE) {
+        return;
+    }
+    session_name($sessionName);
+    session_set_cookie_params([
+        'lifetime' => 0,
+        'path' => $cookiePath,
+        'httponly' => true,
+        'samesite' => 'Lax',
+        'secure' => (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off'),
+    ]);
+    session_start();
+}
diff --git a/orchestration/.env.example b/orchestration/.env.example
index 0cebba8..63ce474 100644
--- a/orchestration/.env.example
+++ b/orchestration/.env.example
@@ -6,6 +6,7 @@ LANDING_HTTP_PORT=8080
 # Optional direct debug ports
 GITEA_FE_PORT=8081
 CRASHES_FE_PORT=8082
+BUILD_FE_PORT=8083
 
 # Internal app creds (local dev defaults)
 MARIADB_ROOT_PASSWORD=androidcast_root
diff --git a/orchestration/deploy.sh b/orchestration/deploy.sh
index 1a59ce3..7394b38 100755
--- a/orchestration/deploy.sh
+++ b/orchestration/deploy.sh
@@ -7,10 +7,13 @@ ENV_EXAMPLE="$ROOT_DIR/.env.example"
 RUNTIME_DIR="$ROOT_DIR/runtime"
 DB_INIT_DIR="$RUNTIME_DIR/db-init"
 CRASH_CONFIG="$RUNTIME_DIR/crash-config.php"
+BUILD_CONFIG="$RUNTIME_DIR/build-config.php"
+OTA_DIR="$RUNTIME_DIR/ota-artifacts"
 
 SRC_SCHEMA="$ROOT_DIR/../examples/crash_reporter/backend/sql/schema.mariadb.sql"
 SRC_MIG_004="$ROOT_DIR/../examples/crash_reporter/backend/sql/migrations/004_ticket_workflow.sql"
 SRC_MIG_005="$ROOT_DIR/../examples/crash_reporter/backend/sql/migrations/005_ticket_attachments.sql"
+SRC_MIG_060="$ROOT_DIR/runtime/db-init/060_build_ecosystem.sql"
 
 if ! command -v docker >/dev/null 2>&1; then
   echo "docker not found in PATH"
@@ -32,13 +35,15 @@ set -a
 source "$ENV_FILE"
 set +a
 
-mkdir -p "$DB_INIT_DIR"
+mkdir -p "$DB_INIT_DIR" "$OTA_DIR"
 
 cat >"$CRASH_CONFIG" <<EOF
 <?php
 return [
     'app_name' => 'Android Cast Crashes',
     'base_path' => '/app/androidcast_project/crashes',
+    'session_name' => 'ac_crash_sess',
+    'session_cookie_path' => '/app/androidcast_project',
     'db' => [
         'driver' => 'mysql',
         'sqlite_path' => __DIR__ . '/../data/crashes.sqlite',
@@ -52,7 +57,6 @@ return [
             'charset' => 'utf8mb4',
         ],
     ],
-    'session_name' => 'ac_crash_sess',
     'debug' => true,
     'rbac' => [
         'default_company_slug' => 'default',
@@ -61,6 +65,51 @@ return [
 ];
 EOF
 
+cat >"$BUILD_CONFIG" <<EOF
+<?php
+return [
+    'app_name' => 'Android Cast Builder',
+    'base_path' => '/app/androidcast_project/build',
+    'session_name' => 'ac_crash_sess',
+    'session_cookie_path' => '/app/androidcast_project',
+    'db' => [
+        'driver' => 'mysql',
+        'sqlite_path' => __DIR__ . '/../../crash_reporter/backend/data/crashes.sqlite',
+        'mysql' => [
+            'host' => 'mariadb',
+            'port' => 3306,
+            'socket' => '',
+            'database' => '${MARIADB_DATABASE}',
+            'username' => '${MARIADB_USER}',
+            'password' => '${MARIADB_PASSWORD}',
+            'charset' => 'utf8mb4',
+        ],
+    ],
+    'debug' => true,
+    'rbac' => [
+        'default_company_slug' => 'default',
+        'default_company_id' => 1,
+    ],
+    'build' => [
+        'docker_image' => 'androidcast-ci:latest',
+        'ci_version' => '00.01.00.1000',
+        'repo_root' => '/workspace',
+        'artifacts_root' => '/workspace/out/builds',
+        'ota_mount' => '/workspace/orchestration/runtime/ota-artifacts',
+        'ota_base_url' => '${PUBLIC_BASE_URL}',
+        'runner_script' => '/workspace/scripts/docker-build-runner.sh',
+        'pipeline_config' => '/workspace/build.config.yml',
+        'default_channels' => ['stable', 'staging', 'dev', 'nightly'],
+    ],
+    'links' => [
+        'hub' => '/app/androidcast_project/',
+        'crashes' => '/app/androidcast_project/crashes/',
+        'git' => '/app/androidcast_project/git/',
+        'tickets' => '/app/androidcast_project/crashes/?view=tickets',
+    ],
+];
+EOF
+
 cp "$SRC_SCHEMA" "$DB_INIT_DIR/010_schema.sql"
 {
   echo "USE \`${MARIADB_DATABASE}\`;"
@@ -70,9 +119,13 @@ cp "$SRC_SCHEMA" "$DB_INIT_DIR/010_schema.sql"
   echo "USE \`${MARIADB_DATABASE}\`;"
   cat "$SRC_MIG_005"
 } >"$DB_INIT_DIR/050_ticket_attachments.sql"
+{
+  echo "USE \`${MARIADB_DATABASE}\`;"
+  cat "$SRC_MIG_060"
+} >"$DB_INIT_DIR/060_build_ecosystem.sql"
 
 echo "Pulling images..."
-docker compose -f "$ROOT_DIR/docker-compose.yml" pull landing-fe gitea-fe crashes-fe mariadb gitea || true
+docker compose -f "$ROOT_DIR/docker-compose.yml" pull landing-fe gitea-fe crashes-fe build-fe mariadb gitea || true
 
 echo "Starting/updating stack..."
 docker compose -f "$ROOT_DIR/docker-compose.yml" up -d --build --remove-orphans --force-recreate
@@ -82,5 +135,7 @@ echo "Stack is up."
 echo "Landing: ${PUBLIC_BASE_URL}/app/androidcast_project/"
 echo "Gitea (direct FE): http://localhost:${GITEA_FE_PORT}/app/androidcast_project/git/"
 echo "Crashes (direct FE): http://localhost:${CRASHES_FE_PORT}/app/androidcast_project/crashes/"
+echo "Builder (direct FE): http://localhost:${BUILD_FE_PORT:-8083}/app/androidcast_project/build/"
+echo "Shared login: same user/password as Crashes (session cookie path /app/androidcast_project)"
 echo
 docker compose -f "$ROOT_DIR/docker-compose.yml" ps
diff --git a/orchestration/docker-compose.yml b/orchestration/docker-compose.yml
index 9620c83..981f60c 100644
--- a/orchestration/docker-compose.yml
+++ b/orchestration/docker-compose.yml
@@ -4,6 +4,7 @@ services:
     depends_on:
       - gitea-fe
       - crashes-fe
+      - build-fe
     ports:
       - "${LANDING_HTTP_PORT}:8080"
     volumes:
@@ -38,6 +39,34 @@ services:
       - appnet
     restart: unless-stopped
 
+  build-fe:
+    image: nginx:1.27-alpine
+    depends_on:
+      - build-php
+    ports:
+      - "${BUILD_FE_PORT}:8080"
+    volumes:
+      - ../:/workspace
+      - ./nginx/build-fe.conf:/etc/nginx/conf.d/default.conf:ro
+    networks:
+      - appnet
+    restart: unless-stopped
+
+  build-php:
+    build:
+      context: .
+      dockerfile: images/build-php-fpm/Dockerfile
+    depends_on:
+      - mariadb
+    volumes:
+      - ../:/workspace
+      - /var/run/docker.sock:/var/run/docker.sock
+      - ./runtime/build-config.php:/workspace/examples/build_console/backend/config/config.php
+      - ./runtime/ota-artifacts:/workspace/orchestration/runtime/ota-artifacts
+    networks:
+      - appnet
+    restart: unless-stopped
+
   crash-php:
     build:
       context: .
diff --git a/orchestration/images/build-php-fpm/Dockerfile b/orchestration/images/build-php-fpm/Dockerfile
new file mode 100644
index 0000000..74bdd0f
--- /dev/null
+++ b/orchestration/images/build-php-fpm/Dockerfile
@@ -0,0 +1,7 @@
+FROM php:8.2-fpm-alpine
+
+RUN apk add --no-cache bash docker-cli icu-dev libzip-dev oniguruma-dev mariadb-client sqlite-dev \
+    && docker-php-ext-install pdo pdo_mysql pdo_sqlite \
+    && rm -rf /var/cache/apk/*
+
+WORKDIR /workspace/examples/build_console/backend
diff --git a/orchestration/nginx/build-fe.conf b/orchestration/nginx/build-fe.conf
new file mode 100644
index 0000000..2f4b605
--- /dev/null
+++ b/orchestration/nginx/build-fe.conf
@@ -0,0 +1,39 @@
+server {
+    listen 8080;
+    server_name _;
+
+    client_max_body_size 64m;
+    index index.php;
+
+    location = / {
+        return 302 /app/androidcast_project/build/;
+    }
+
+    location /app/androidcast_project/build/ {
+        alias /workspace/examples/build_console/backend/public/;
+        index index.php;
+        try_files $uri $uri/ @build_front;
+    }
+
+    location /app/androidcast_project/crashes/assets/ {
+        alias /workspace/examples/crash_reporter/backend/public/assets/;
+    }
+
+    location @build_front {
+        rewrite ^ /app/androidcast_project/build/index.php?$query_string last;
+    }
+
+    location ~ ^/app/androidcast_project/build/(.+\.php)$ {
+        alias /workspace/examples/build_console/backend/public/$1;
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME /workspace/examples/build_console/backend/public/$1;
+        fastcgi_param SCRIPT_NAME /app/androidcast_project/build/$1;
+        fastcgi_param DOCUMENT_ROOT /workspace/examples/build_console/backend/public;
+        fastcgi_pass build-php:9000;
+        fastcgi_read_timeout 300s;
+    }
+
+    location ~ /\. {
+        deny all;
+    }
+}
diff --git a/orchestration/nginx/landing.conf b/orchestration/nginx/landing.conf
index 5c5f06a..a5a73ac 100644
--- a/orchestration/nginx/landing.conf
+++ b/orchestration/nginx/landing.conf
@@ -21,6 +21,20 @@ server {
         proxy_set_header X-Forwarded-Proto $scheme;
     }
 
+    location /app/androidcast_project/build/ {
+        proxy_pass http://build-fe:8080;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location /app/androidcast_project/v0/ota/ {
+        alias /workspace/orchestration/runtime/ota-artifacts/v0/;
+        add_header Cache-Control "public, max-age=60";
+    }
+
     location /app/androidcast_project/ {
         alias /workspace/examples/app_hub/;
         index index.html;
diff --git a/orchestration/runtime/db-init/060_build_ecosystem.sql b/orchestration/runtime/db-init/060_build_ecosystem.sql
new file mode 100644
index 0000000..7091d13
--- /dev/null
+++ b/orchestration/runtime/db-init/060_build_ecosystem.sql
@@ -0,0 +1,30 @@
+CREATE TABLE IF NOT EXISTS builds (
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    build_code VARCHAR(64) NOT NULL,
+    status ENUM('queued','running','passed','failed','cancelled') NOT NULL DEFAULT 'queued',
+    phase VARCHAR(64) NOT NULL DEFAULT 'init',
+    git_ref VARCHAR(256) NULL,
+    git_sha VARCHAR(64) NULL,
+    branch VARCHAR(128) NULL,
+    pipeline_yaml LONGTEXT NULL,
+    params_json LONGTEXT NOT NULL,
+    dockerfile_version VARCHAR(32) NOT NULL DEFAULT '00.01.00.1000',
+    builder_id VARCHAR(128) NOT NULL DEFAULT 'local-docker',
+    version_app VARCHAR(32) NULL,
+    version_code INT NULL,
+    target_os VARCHAR(32) NOT NULL DEFAULT 'android',
+    min_api_level INT NOT NULL DEFAULT 24,
+    ota_channel VARCHAR(64) NULL,
+    auto_ota TINYINT(1) NOT NULL DEFAULT 0,
+    auto_deploy TINYINT(1) NOT NULL DEFAULT 0,
+    log_path VARCHAR(512) NULL,
+    artifacts_json LONGTEXT NULL,
+    error_message VARCHAR(512) NULL,
+    created_by_user_id INT UNSIGNED NULL,
+    started_at TIMESTAMP NULL,
+    finished_at TIMESTAMP NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE KEY uq_builds_code (build_code),
+    KEY idx_builds_status (status),
+    KEY idx_builds_created (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
diff --git a/scripts/ci-build-and-publish-ota.sh b/scripts/ci-build-and-publish-ota.sh
new file mode 100755
index 0000000..6db1170
--- /dev/null
+++ b/scripts/ci-build-and-publish-ota.sh
@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# CI pipeline entry: optional git checkout, native, gradle, OTA publish.
+#
+# Env:
+#   GRADLE_TASK          assembleDebug | assembleRelease | testDebugUnitTest | …
+#   RUN_UNIT_TESTS       1 (default) | 0
+#   RUN_NATIVE           1 (default) | 0
+#   RUN_APK              1 (default) | 0 — set 0 for tests-only
+#   OTA_BASE_URL         public base for v0/ota (empty = skip OTA)
+#   OTA_CHANNEL          stable | staging | dev | nightly | custom name
+#   AUTO_OTA             1 to emit OTA tree under OUT_DIR
+#   OUT_DIR              artifact root (default ./out/builds/$BUILD_ID)
+#   BUILD_ID             build record id
+#   GIT_REF              branch | tag | commit to checkout before build
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT"
+
+BUILD_ID="${BUILD_ID:-local}"
+OUT_DIR="${OUT_DIR:-${ROOT}/out/builds/${BUILD_ID}}"
+GRADLE_TASK="${GRADLE_TASK:-assembleDebug}"
+RUN_UNIT_TESTS="${RUN_UNIT_TESTS:-1}"
+RUN_NATIVE="${RUN_NATIVE:-1}"
+RUN_APK="${RUN_APK:-1}"
+OTA_CHANNEL="${OTA_CHANNEL:-staging}"
+AUTO_OTA="${AUTO_OTA:-0}"
+
+mkdir -p "$OUT_DIR"
+exec > >(tee -a "${OUT_DIR}/build.log") 2>&1
+
+echo "==> Phase: init build_id=${BUILD_ID} channel=${OTA_CHANNEL}"
+
+if [[ -n "${GIT_REF:-}" ]]; then
+  echo "==> Phase: git checkout ${GIT_REF}"
+  git fetch --all --tags 2>/dev/null || true
+  git checkout --force "$GIT_REF"
+  if [[ -n "${GIT_SHA:-}" ]]; then
+    git reset --hard "$GIT_SHA"
+  fi
+fi
+
+export ANDROIDCAST_ROOT="$ROOT"
+export ANDROIDCAST_CCACHE="${ANDROIDCAST_CCACHE:-1}"
+# shellcheck source=android-ndk.sh
+source "$ROOT/scripts/android-ndk.sh"
+export ANDROID_NDK_HOME="$(androidcast_find_ndk_root "$ROOT")"
+export ANDROID_NDK_ROOT="$ANDROID_NDK_HOME"
+
+if [[ "$RUN_NATIVE" == "1" && "$RUN_APK" == "1" ]]; then
+  echo "==> Phase: native codecs"
+  ABIS="${ANDROIDCAST_CI_ABIS:-armeabi-v7a arm64-v8a x86_64}"
+  rm -rf "$ROOT/build/native"
+  mkdir -p "$ROOT/build/native"
+  for abi in $ABIS; do
+    ./scripts/build-native-codecs.sh "$abi"
+  done
+else
+  echo "==> Phase: native codecs (skipped)"
+fi
+
+if [[ "$RUN_APK" == "1" ]]; then
+  echo "==> Phase: gradle ${GRADLE_TASK}"
+  if [[ "$RUN_UNIT_TESTS" == "1" ]]; then
+    ./gradlew --no-daemon clean "${GRADLE_TASK}" testDebugUnitTest
+  else
+    ./gradlew --no-daemon clean "${GRADLE_TASK}"
+  fi
+else
+  echo "==> Phase: gradle tests-only"
+  ./gradlew --no-daemon testDebugUnitTest
+fi
+
+APK=""
+if [[ "$RUN_APK" == "1" ]]; then
+  for candidate in \
+    "$ROOT/app/build/outputs/apk/debug/app-debug.apk" \
+    "$ROOT/app/build/outputs/apk/release/app-release-unsigned.apk" \
+    "$ROOT/app/build/outputs/apk/release/app-release.apk"; do
+    if [[ -f "$candidate" ]]; then
+      APK="$candidate"
+      break
+    fi
+  done
+  if [[ -z "$APK" ]]; then
+    echo "ERROR: no APK produced" >&2
+    exit 1
+  fi
+  cp -f "$APK" "${OUT_DIR}/android_cast-latest.apk"
+  echo "==> APK: ${OUT_DIR}/android_cast-latest.apk"
+fi
+
+if [[ "$AUTO_OTA" == "1" && -n "${OTA_BASE_URL:-}" && -n "$APK" ]]; then
+  echo "==> Phase: OTA publish channel=${OTA_CHANNEL}"
+  OTA_PUBLISH="${OUT_DIR}/ota-publish"
+  rm -rf "$OTA_PUBLISH"
+  ./scripts/generate-ota-v0.sh "$APK" "$OTA_BASE_URL" "$OTA_PUBLISH" "$OTA_CHANNEL"
+  mkdir -p "${OUT_DIR}/ota"
+  cp -rf "${OTA_PUBLISH}/v0" "${OUT_DIR}/ota/"
+  for ch in staging dev nightly stable; do
+    if [[ "$OTA_CHANNEL" == "$ch" ]]; then
+      continue
+    fi
+    if [[ "$OTA_CHANNEL" == "stable" || "$OTA_CHANNEL" == "prod" || "$OTA_CHANNEL" == "production" || "$OTA_CHANNEL" == "release" ]]; then
+      ./scripts/generate-ota-v0.sh "$APK" "$OTA_BASE_URL" "${OUT_DIR}/ota-publish-${ch}" "$ch" || true
+      mkdir -p "${OUT_DIR}/ota-${ch}"
+      cp -rf "${OUT_DIR}/ota-publish-${ch}/v0" "${OUT_DIR}/ota-${ch}/" 2>/dev/null || true
+    fi
+  done
+fi
+
+cat >"${OUT_DIR}/BUILD_INFO.json" <<EOF
+{
+  "buildId": "${BUILD_ID}",
+  "gradleTask": "${GRADLE_TASK}",
+  "otaChannel": "${OTA_CHANNEL}",
+  "apk": "android_cast-latest.apk",
+  "gitSha": "$(git -C "$ROOT" rev-parse HEAD 2>/dev/null || echo unknown)",
+  "gitRef": "${GIT_REF:-}",
+  "ciVersion": "${ANDROIDCAST_CI_VERSION:-00.01.00.1000}"
+}
+EOF
+
+echo "==> Phase: done"
diff --git a/scripts/docker-build-runner.sh b/scripts/docker-build-runner.sh
new file mode 100755
index 0000000..2894a2c
--- /dev/null
+++ b/scripts/docker-build-runner.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+# Host wrapper: build CI image + run pipeline with log capture.
+#
+# Usage:
+#   ./scripts/docker-build-runner.sh --build-id 42 --workdir /path/to/repo
+#
+# Env: see ci-build-and-publish-ota.sh
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+IMAGE="${ANDROIDCAST_CI_IMAGE:-androidcast-ci:latest}"
+CI_VERSION="${ANDROIDCAST_CI_VERSION:-00.01.00.1000}"
+BUILD_ID="${BUILD_ID:-local}"
+LOG_FILE="${BUILD_LOG_FILE:-${ROOT}/out/builds/${BUILD_ID}/build.log}"
+WORK_DIR="${BUILD_WORK_DIR:-${ROOT}}"
+OUT_DIR="${BUILD_OUT_DIR:-${WORK_DIR}/out/builds/${BUILD_ID}}"
+
+mkdir -p "$(dirname "$LOG_FILE")" "$OUT_DIR"
+
+echo "[runner] image=${IMAGE} ci_version=${CI_VERSION} build_id=${BUILD_ID}" | tee -a "$LOG_FILE"
+echo "[runner] workdir=${WORK_DIR} out=${OUT_DIR}" | tee -a "$LOG_FILE"
+
+docker build \
+  --build-arg ANDROIDCAST_CI_VERSION="${CI_VERSION}" \
+  -t "$IMAGE" \
+  -f "${ROOT}/Dockerfile" \
+  "${ROOT}" 2>&1 | tee -a "$LOG_FILE"
+
+docker run --rm \
+  -v "${WORK_DIR}:/workspace" \
+  -v "${ROOT}/out:/workspace/out" \
+  -w /workspace \
+  -e BUILD_ID="${BUILD_ID}" \
+  -e OUT_DIR="/workspace/out/builds/${BUILD_ID}" \
+  -e OTA_BASE_URL="${OTA_BASE_URL:-}" \
+  -e OTA_CHANNEL="${OTA_CHANNEL:-staging}" \
+  -e GRADLE_TASK="${GRADLE_TASK:-assembleDebug}" \
+  -e RUN_UNIT_TESTS="${RUN_UNIT_TESTS:-1}" \
+  -e RUN_NATIVE="${RUN_NATIVE:-1}" \
+  -e AUTO_OTA="${AUTO_OTA:-0}" \
+  -e GIT_REF="${GIT_REF:-}" \
+  -e GIT_SHA="${GIT_SHA:-}" \
+  -e RELEASE_NOTES="${RELEASE_NOTES:-}" \
+  "$IMAGE" \
+  ./scripts/ci-build-and-publish-ota.sh 2>&1 | tee -a "$LOG_FILE"
+
+echo "[runner] finished build_id=${BUILD_ID}" | tee -a "$LOG_FILE"
diff --git a/scripts/generate-ota-v0.sh b/scripts/generate-ota-v0.sh
index 45fe16e..d8035ea 100755
--- a/scripts/generate-ota-v0.sh
+++ b/scripts/generate-ota-v0.sh
@@ -2,8 +2,9 @@
 # Generate v0 OTA artifacts for one APK (stdout = channel stable.json).
 #
 # Usage:
-#   ./scripts/generate-ota-v0.sh path/to/app-release.apk https://host[:port] [out-dir]
+#   ./scripts/generate-ota-v0.sh path/to/app-release.apk https://host[:port] [out-dir] [channel]
 #
+#   channel — JSON under v0/ota/channel/ (stable, staging, dev, nightly, or custom)
 # Writes under out-dir (default: ./ota-publish):
 #   v0/ota/channel/stable.json
 #   v0/ota/00/00.MM/00.MM.mm/android_cast_00.MM.mm.BB_manifest.json
@@ -15,6 +16,7 @@ set -euo pipefail
 apk="${1:?APK path required}"
 host_base="${2:?Base URL required, e.g. https://192.168.1.1:8080}"
 out_dir="${3:-ota-publish}"
+channel="${4:-stable}"
 
 if [[ ! -f "$apk" ]]; then
   echo "APK not found: $apk" >&2
@@ -115,7 +117,8 @@ cat >"${rel_dir}/${manifest_name}" <<EOF
 }
 EOF
 
-cat >"${rel_root}/channel/stable.json" <<EOF
+channel_file="${rel_root}/channel/${channel}.json"
+cat >"${channel_file}" <<EOF
 {
   "schema": "v0",
   "manifestUrl": "${manifest_url}"
@@ -123,6 +126,6 @@ cat >"${rel_root}/channel/stable.json" <<EOF
 EOF
 
 echo "Published v0 OTA under ${out_dir}/v0/ota" >&2
-echo "Channel: ${host_base%/}/v0/ota/channel/stable.json" >&2
+echo "Channel: ${host_base%/}/v0/ota/channel/${channel}.json" >&2
 echo "Bundle: ${bundle_url} (${bundle_size} bytes)" >&2
-cat "${rel_root}/channel/stable.json"
+cat "${channel_file}"