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+# Failure Display Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Introduce a configurable "failing source" threshold (default 5 consecutive failures) and surface it on the Dashboard as per-platform health bars plus a strict failing-source list.
+
+**Architecture:** Four small changes. (1) Backend adds one default setting key. (2) Settings page adds one number input. (3) Dashboard script adds a settings fetch and three derived computeds. (4) Dashboard template replaces the "Sources Needing Attention" card body with platform bars + a filtered table, removing the old recent-failure-based list.
+
+**Tech Stack:** Python/Quart + SQLAlchemy backend, Vue 3 + Vuetify 3 + Pinia frontend. No test infrastructure in the repo; verification is via `npm run build`, spec-file diffs, and visual inspection after the user deploys.
+
+Spec: `docs/superpowers/specs/2026-04-17-failure-display-design.md`
+
+---
+
+## File Structure
+
+| File | Role | Change |
+|---|---|---|
+| `backend/app/models/setting.py` | DEFAULT_SETTINGS dict | Add `"dashboard.failure_threshold": 5` |
+| `frontend/src/views/Settings.vue` | Application settings page | Add Dashboard section with threshold input |
+| `frontend/src/views/Dashboard.vue` | Main dashboard page | Add settings store + computeds; replace "Sources Needing Attention" card body; remove obsolete `sourcesWithErrors`; add scoped CSS |
+
+No new files. No store changes — `useSettingsStore` in `frontend/src/stores/settings.js` already exposes `fetchSettings()` and a reactive `settings` ref.
+
+---
+
+## Task 1: Add default threshold to backend settings
+
+**Files:**
+- Modify: `backend/app/models/setting.py:39-46`
+
+- [ ] **Step 1: Add the new key to `DEFAULT_SETTINGS`**
+
+Open `backend/app/models/setting.py` and replace the `DEFAULT_SETTINGS` dict (currently lines 39–46) with:
+
+```python
+# Default settings that should exist
+DEFAULT_SETTINGS = {
+    "download.parallel_limit": 3,
+    "download.rate_limit": 3.0,
+    "download.retry_count": 3,
+    "download.schedule_interval": 28800,  # 8 hours
+    "notification.enabled": False,
+    "notification.webhook_url": None,
+    "dashboard.failure_threshold": 5,
+}
+```
+
+Why this is enough: `settings` is a key-value table. `GET /api/settings` (in `backend/app/api/settings.py`) merges stored rows on top of `DEFAULT_SETTINGS` and returns the result. A brand-new key appears in the API response immediately; existing installations get the default until/unless the user saves a different value from the Settings page. No migration, no new endpoint.
+
+- [ ] **Step 2: Commit**
+
+```bash
+git add backend/app/models/setting.py
+git commit -m "feat(settings): add dashboard.failure_threshold default (5)"
+```
+
+---
+
+## Task 2: Add threshold input to the Settings page
+
+**Files:**
+- Modify: `frontend/src/views/Settings.vue` (template only)
+
+- [ ] **Step 1: Insert a Dashboard section above the Notifications divider**
+
+In `frontend/src/views/Settings.vue`, locate the block that ends the Download Settings section and starts the Notifications section:
+
+```vue
+          </v-row>
+
+          <v-divider class="my-6" />
+
+          <!-- Notification Settings -->
+          <h3 class="text-h6 mb-4">Notifications</h3>
+```
+
+Replace it with:
+
+```vue
+          </v-row>
+
+          <v-divider class="my-6" />
+
+          <!-- Dashboard Settings -->
+          <h3 class="text-h6 mb-4">Dashboard</h3>
+          <v-row>
+            <v-col cols="12" md="6">
+              <v-text-field
+                v-model.number="settings['dashboard.failure_threshold']"
+                label="Failing source threshold"
+                type="number"
+                min="1"
+                max="20"
+                hint="Consecutive download failures before a source is marked failing. One success resets the counter."
+                persistent-hint
+              />
+            </v-col>
+          </v-row>
+
+          <v-divider class="my-6" />
+
+          <!-- Notification Settings -->
+          <h3 class="text-h6 mb-4">Notifications</h3>
+```
+
+Why this is enough: `saveSettings()` at `Settings.vue:463` calls `settingsStore.updateSettings(settings.value)` which PATCHes every key in the object. A new `v-model` binding flows through without any handler changes.
+
+- [ ] **Step 2: Verify the frontend still builds**
+
+Run from the repo root:
+```bash
+cd frontend && npm run build
+```
+Expected: build completes with no errors. A Vuetify warning about `persistent-hint` is non-fatal if it appears.
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add frontend/src/views/Settings.vue
+git commit -m "feat(settings-ui): expose dashboard failure threshold"
+```
+
+---
+
+## Task 3: Dashboard script — settings store, fetch, computeds
+
+**Files:**
+- Modify: `frontend/src/views/Dashboard.vue` (`<script setup>` block only)
+
+- [ ] **Step 1: Import the settings store**
+
+Find the existing imports at the top of `<script setup>` (around line 297–303):
+
+```js
+<script setup>
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { useSourcesStore } from '../stores/sources'
+import { useDownloadsStore } from '../stores/downloads'
+import { useCredentialsStore } from '../stores/credentials'
+import { useNotificationStore } from '../stores/notifications'
+import { settingsApi, downloadsApi } from '../services/api'
+```
+
+Add one line for the settings store:
+
+```js
+<script setup>
+import { ref, computed, onMounted, onUnmounted } from 'vue'
+import { useSourcesStore } from '../stores/sources'
+import { useDownloadsStore } from '../stores/downloads'
+import { useCredentialsStore } from '../stores/credentials'
+import { useNotificationStore } from '../stores/notifications'
+import { useSettingsStore } from '../stores/settings'
+import { settingsApi, downloadsApi } from '../services/api'
+```
+
+- [ ] **Step 2: Instantiate the store**
+
+Find the block of store instantiations (around lines 305–308):
+
+```js
+const sourcesStore = useSourcesStore()
+const downloadsStore = useDownloadsStore()
+const credentialsStore = useCredentialsStore()
+const notifications = useNotificationStore()
+```
+
+Add the settings store instance:
+
+```js
+const sourcesStore = useSourcesStore()
+const downloadsStore = useDownloadsStore()
+const credentialsStore = useCredentialsStore()
+const notifications = useNotificationStore()
+const settingsStore = useSettingsStore()
+```
+
+- [ ] **Step 3: Fetch settings in `loadDashboardData`**
+
+Locate `loadDashboardData()` (around line 367). The current body is:
+
+```js
+function loadDashboardData() {
+  // Fire off all requests in parallel, don't block UI
+  // Each section handles its own loading state
+  sourcesStore.fetchSources().catch(e => console.error('Failed to fetch sources:', e))
+  credentialsStore.fetchCredentials().catch(e => console.error('Failed to fetch credentials:', e))
+
+  downloadsStore.fetchStats()
+    .catch(e => console.error('Failed to fetch stats:', e))
+    .finally(() => loadingStats.value = false)
+
+  downloadsStore.fetchRecentActivity({ limit: 10 })
+    .catch(e => console.error('Failed to fetch recent activity:', e))
+    .finally(() => loadingActivity.value = false)
+
+  fetchActiveDownloads()
+
+  // Storage stats can be slow - load independently
+  fetchStorageStats()
+}
+```
+
+Add one line — the `settingsStore.fetchSettings()` call — right after the `credentialsStore.fetchCredentials()` line:
+
+```js
+function loadDashboardData() {
+  // Fire off all requests in parallel, don't block UI
+  // Each section handles its own loading state
+  sourcesStore.fetchSources().catch(e => console.error('Failed to fetch sources:', e))
+  credentialsStore.fetchCredentials().catch(e => console.error('Failed to fetch credentials:', e))
+  settingsStore.fetchSettings().catch(e => console.error('Failed to fetch settings:', e))
+
+  downloadsStore.fetchStats()
+    .catch(e => console.error('Failed to fetch stats:', e))
+    .finally(() => loadingStats.value = false)
+
+  downloadsStore.fetchRecentActivity({ limit: 10 })
+    .catch(e => console.error('Failed to fetch recent activity:', e))
+    .finally(() => loadingActivity.value = false)
+
+  fetchActiveDownloads()
+
+  // Storage stats can be slow - load independently
+  fetchStorageStats()
+}
+```
+
+- [ ] **Step 4: Add platform order constant, threshold computed, and two derived computeds**
+
+Find the `sourcesWithErrors` computed (currently lines 329–347). Leave it alone for now — Task 4 removes it. Immediately above it, after the line `const recentActivity = computed(() => downloadsStore.recentActivity)`, insert:
+
+```js
+// Fixed display order for platform health bars
+const PLATFORM_ORDER = [
+  'patreon', 'subscribestar', 'hentaifoundry',
+  'discord', 'pixiv', 'deviantart',
+]
+
+// Read threshold from settings, default 5 if unset
+const failureThreshold = computed(() =>
+  settingsStore.settings?.['dashboard.failure_threshold'] ?? 5
+)
+
+// Per-platform health for platforms with ≥1 enabled source
+const platformHealth = computed(() => {
+  const enabled = sourcesStore.sources.filter(s => s.enabled)
+  return PLATFORM_ORDER
+    .map(platform => {
+      const sources = enabled.filter(s => s.platform === platform)
+      if (sources.length === 0) return null
+      const failing = sources.filter(
+        s => (s.error_count || 0) >= failureThreshold.value
+      ).length
+      return { platform, total: sources.length, failing }
+    })
+    .filter(Boolean)
+})
+
+// Sources currently in failing state, most-recent-check first
+const failingSources = computed(() => {
+  return sourcesStore.sources
+    .filter(s => s.enabled && (s.error_count || 0) >= failureThreshold.value)
+    .sort((a, b) => new Date(b.last_check || 0) - new Date(a.last_check || 0))
+})
+
+const totalFailingCount = computed(() => failingSources.value.length)
+```
+
+- [ ] **Step 5: Verify the frontend still builds**
+
+```bash
+cd frontend && npm run build
+```
+Expected: build completes with no errors.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add frontend/src/views/Dashboard.vue
+git commit -m "feat(dashboard): add failure-threshold computeds backed by settings store"
+```
+
+---
+
+## Task 4: Dashboard template — replace card body, remove obsolete code, add CSS
+
+This task rewrites the "Sources Needing Attention" card to show platform health bars plus the strict failing-source list, and deletes the now-dead `sourcesWithErrors` computed. Do the steps in order — the removal at the end relies on the template no longer referencing the old computed.
+
+**Files:**
+- Modify: `frontend/src/views/Dashboard.vue` (template, script cleanup, scoped CSS)
+
+- [ ] **Step 1: Replace the card header chip binding**
+
+Find the "Sources Needing Attention" card title (around lines 239–244):
+
+```vue
+<v-card-title>
+  Sources Needing Attention
+  <v-chip class="ml-2" color="error" size="small" v-if="sourcesWithErrors.length">
+    {{ sourcesWithErrors.length }}
+  </v-chip>
+</v-card-title>
+```
+
+Replace the chip binding so it reads from the new total:
+
+```vue
+<v-card-title>
+  Sources Needing Attention
+  <v-chip class="ml-2" color="error" size="small" v-if="totalFailingCount">
+    {{ totalFailingCount }}
+  </v-chip>
+</v-card-title>
+```
+
+- [ ] **Step 2: Replace the card body**
+
+Locate the `v-card-text` that follows that title (currently lines 245–290 — the block starting with `<v-card-text>` and containing the `<v-table v-if="sourcesWithErrors.length">` and its `v-else` empty state, ending with `</v-card-text>`).
+
+Replace the entire `v-card-text` block with:
+
+```vue
+<v-card-text>
+  <!-- Platform Health bars -->
+  <div class="mb-4">
+    <div class="text-caption text-medium-emphasis mb-2">Platform Health</div>
+    <div
+      v-for="row in platformHealth"
+      :key="row.platform"
+      class="d-flex align-center mb-2"
+    >
+      <v-icon :color="getPlatformColor(row.platform)" size="small" class="mr-2">
+        {{ getPlatformIcon(row.platform) }}
+      </v-icon>
+      <div class="text-body-2 platform-label">{{ row.platform }}</div>
+      <v-progress-linear
+        :model-value="row.failing > 0 ? (row.failing / row.total) * 100 : 100"
+        :color="row.failing > 0 ? 'error' : 'success'"
+        height="12"
+        rounded
+        class="mx-3 flex-grow-1"
+      />
+      <div class="text-caption text-medium-emphasis count-label">
+        {{ row.failing }}/{{ row.total }}
+      </div>
+    </div>
+    <div
+      v-if="!platformHealth.length"
+      class="text-caption text-medium-emphasis text-center py-2"
+    >
+      No enabled sources
+    </div>
+  </div>
+
+  <v-divider class="my-3" />
+
+  <!-- Failing Sources list -->
+  <v-table v-if="failingSources.length" density="compact">
+    <thead>
+      <tr>
+        <th>Source</th>
+        <th>Consecutive failures</th>
+        <th>Last check</th>
+        <th>Actions</th>
+      </tr>
+    </thead>
+    <tbody>
+      <tr v-for="source in failingSources" :key="source.id">
+        <td>{{ getSourceLabel(source) }}</td>
+        <td>
+          <v-chip color="error" size="small">{{ source.error_count }}</v-chip>
+        </td>
+        <td>{{ formatDate(source.last_check) }}</td>
+        <td>
+          <v-btn
+            size="small"
+            variant="text"
+            color="primary"
+            @click="retrySource(source)"
+          >
+            Retry
+          </v-btn>
+          <v-btn size="small" variant="text" to="/subscriptions">
+            View
+            <v-tooltip activator="parent">View in Subscriptions</v-tooltip>
+          </v-btn>
+        </td>
+      </tr>
+    </tbody>
+  </v-table>
+  <div v-else class="text-caption text-medium-emphasis text-center py-3">
+    No sources in failing state
+  </div>
+</v-card-text>
+```
+
+Notes:
+- The extra "No enabled sources" line inside the Platform Health block is a defensive empty state for the edge case where the user has deleted every source. Normally `platformHealth` has at least one entry.
+- `getPlatformColor`, `getPlatformIcon`, `getSourceLabel`, `formatDate`, and `retrySource` are all existing functions in the same component — no new helpers needed.
+- `source.subscription_name` is included in the `Source.to_dict()` payload (see `backend/app/models/source.py:66`), so `getSourceLabel` works on the store's raw source objects.
+
+- [ ] **Step 3: Delete the obsolete `sourcesWithErrors` computed**
+
+In `<script setup>`, remove the entire `sourcesWithErrors` computed (previously lines 329–347). After removal, this block:
+
+```js
+const stats = computed(() => downloadsStore.stats)
+const recentActivity = computed(() => downloadsStore.recentActivity)
+
+// Fixed display order for platform health bars
+const PLATFORM_ORDER = [
+  'patreon', 'subscribestar', 'hentaifoundry',
+  'discord', 'pixiv', 'deviantart',
+]
+```
+
+should sit directly after the platform-health computeds you added in Task 3, with nothing between `recentActivity` and `PLATFORM_ORDER` except a blank line. Verify no `sourcesWithErrors` references remain:
+
+```bash
+grep -n "sourcesWithErrors" frontend/src/views/Dashboard.vue
+```
+Expected: no output.
+
+- [ ] **Step 4: Add scoped CSS for label alignment**
+
+Find the existing `<style scoped>` block at the bottom of `Dashboard.vue` (currently lines 601–611, containing `.download-running`). Append two rules inside that block so it becomes:
+
+```vue
+<style scoped>
+.download-running {
+  border-left: 3px solid rgb(var(--v-theme-primary));
+  animation: pulse-border 2s ease-in-out infinite;
+}
+
+@keyframes pulse-border {
+  0%, 100% { opacity: 1; }
+  50%       { opacity: 0.4; }
+}
+
+.platform-label {
+  min-width: 110px;
+  text-transform: capitalize;
+}
+
+.count-label {
+  min-width: 50px;
+  text-align: right;
+}
+</style>
+```
+
+- [ ] **Step 5: Verify the frontend builds**
+
+```bash
+cd frontend && npm run build
+```
+Expected: build completes with no errors. Any warning about the removed `sourcesWithErrors` reference means Step 3 missed a spot — re-check the template.
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add frontend/src/views/Dashboard.vue
+git commit -m "feat(dashboard): replace recent-failures list with platform health bars + strict failing-source table"
+```
+
+---
+
+## Verification after all tasks
+
+The user deploys separately. After deploy:
+1. Visit `/settings` — confirm the Dashboard section shows a "Failing source threshold" input defaulting to 5.
+2. Change the threshold, Save, reload — confirm the value persists.
+3. Visit `/` — confirm the "Sources Needing Attention" card shows:
+   - One bar per platform with ≥1 enabled source, in the fixed order.
+   - Green full bars for platforms with no failing sources.
+   - Proportional red fill on platforms where some sources have `error_count >= threshold`.
+   - A table listing sources in failing state (if any), sorted by `last_check` DESC.
+   - "No sources in failing state" caption when the list is empty.
+4. Lower the threshold on the Settings page — confirm additional sources appear in the failing list when their `error_count` crosses the new (lower) line.
+
+No automated test verification is available. The build passing and the Dashboard rendering without console errors is the bar.