diff --git a/docs/specs/explorer.md b/docs/specs/explorer.md
index f9f471b..ab1127a 100644
--- a/docs/specs/explorer.md
+++ b/docs/specs/explorer.md
@@ -40,7 +40,7 @@ URL-bar style input accepting:
 
 ## Additional Features
 
-- **Backlinks**: show records that reference the current record (requires relay/constellation)
+- **Backlinks** (via Constellation): show records that reference the current record, grouped by interaction type (likes, reposts, replies, quotes) with counts and expandable actor lists. Uses `blue.microcosm.links.getBacklinks` and `getBacklinksCount` endpoints.
 - **Jetstream live view**: stream new records in real-time via `jacquard::jetstream`
 - **CAR export**: download repo as CAR archive via `com.atproto.sync.getRepo`
 - **Moderation labels**: query and display labels via `com.atproto.label.queryLabels`
diff --git a/docs/specs/multicolumn.md b/docs/specs/multicolumn.md
new file mode 100644
index 0000000..71ce0f7
--- /dev/null
+++ b/docs/specs/multicolumn.md
@@ -0,0 +1,123 @@
+# Multicolumn Views
+
+TweetDeck-style layout allowing users to view multiple feeds, AT Explorer panels, and social diagnostics panels side by side. Each column is an independent, scrollable pane with its own state.
+
+## Layout Model
+
+A horizontally scrolling container of columns. Each column has a fixed width class and independent scroll position.
+
+### Column Widths
+
+| Width      | Pixels | Use Case                          |
+| ---------- | ------ | --------------------------------- |
+| `narrow`   | 320px  | Notification-style, compact feeds |
+| `standard` | 420px  | Default for feeds and diagnostics |
+| `wide`     | 560px  | AT Explorer, thread views         |
+
+Columns snap to their width boundaries. The container scrolls horizontally when total column width exceeds the viewport. On narrow windows (< 768px), collapse to single-column with horizontal swipe navigation.
+
+### Column Anatomy
+
+```text
+┌───────────────────────────┐
+│ [≡] Column Title    [-][×]│  ← header: drag handle, title, width toggle, close
+├───────────────────────────┤
+│                           │
+│    Column Content         │  ← independent scrollable content area
+│    (feed / explorer /     │
+│     diagnostics)          │
+│                           │
+└───────────────────────────┘
+```
+
+- **Drag handle** (`i-ri-draggable`): reorder columns via drag-and-drop
+- **Title**: feed name, explorer path, or diagnostics target
+- **Width toggle**: cycle narrow → standard → wide
+- **Close** (`i-ri-close-line`): remove column with confirmation if it has unsaved state
+
+## Column Types
+
+### Feed Column
+
+Reuses feed content loader and post card components from the feeds module.
+
+- Independent cursor pagination and scroll position
+- Column-specific feed preferences (hide reposts/replies/quotes)
+- Inline thread expansion (click post → expand thread within column)
+- Supports: timeline, custom feed generators, list feeds
+
+### Explorer Column
+
+Reuses AT Explorer views (PDS, repo, collection, record).
+
+- Independent navigation stack per column (breadcrumbs, back/forward)
+- Compact record rendering mode when column width is `narrow`
+- Full JSON view available in `standard` and `wide`
+
+### Diagnostics Column
+
+Displays a social diagnostics panel for a target DID.
+
+- Shows all diagnostics tabs (lists, labels, blocks, starter packs, backlinks)
+- Tab navigation within the column
+- Compact card layout adapted to column width
+
+## Column Management
+
+### Adding Columns
+
+"Add column" button (`i-ri-add-line`) in the deck toolbar opens a picker:
+
+- **Feed picker**: pinned feeds, saved feeds, list feeds
+- **Explorer picker**: input field accepting at:// URI, handle, DID, or PDS URL
+- **Diagnostics picker**: input field accepting handle or DID
+
+New columns append to the right by default. Optional position insertion via drag during add.
+
+### Persistence
+
+Column layout is stored per account in SQLite:
+
+```sql
+CREATE TABLE columns (
+  id TEXT PRIMARY KEY,
+  account_did TEXT NOT NULL,
+  kind TEXT NOT NULL,          -- 'feed' | 'explorer' | 'diagnostics'
+  config TEXT NOT NULL,        -- JSON: feed → { feed_uri, feed_type }, explorer → { target_uri }, diagnostics → { did }
+  position INTEGER NOT NULL,
+  width TEXT NOT NULL DEFAULT 'standard',
+  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+```
+
+Layout restored on app launch per active account. Account switch swaps the full column set.
+
+### Context Menu
+
+Right-click column header:
+
+- Resize (narrow / standard / wide)
+- Duplicate column
+- Move left / Move right
+- Close
+
+## Keyboard Shortcuts
+
+| Key              | Action                 |
+| ---------------- | ---------------------- |
+| `Ctrl+Shift+N`   | Add column             |
+| `Ctrl+Shift+W`   | Close focused column   |
+| `Ctrl+[` / `]`   | Focus prev/next column |
+| `Ctrl+Shift+[/]` | Move column left/right |
+
+Focus is indicated by a subtle `primary` glow on the column header (ambient glow, per design spec).
+
+## UX Polish
+
+- Drag-and-drop reorder: `Motion` position animation with spring easing
+- Add column: `Presence` scale-in from center
+- Remove column: `Presence` scale-out with adjacent columns sliding to fill gap via `Motion`
+- Column focus transition: `Motion` glow fade on header
+- Horizontal scroll: smooth scroll-snap with momentum
+- Responsive collapse: `Presence` crossfade when switching between multicolumn and single-column modes
+- Skeleton screens per column while content loads
diff --git a/docs/specs/mvp.md b/docs/specs/mvp.md
index fd062b2..2f8eedf 100644
--- a/docs/specs/mvp.md
+++ b/docs/specs/mvp.md
@@ -1,6 +1,6 @@
-# Lazurite Desktop — MVP Spec
+# Lazurite Desktop - MVP Spec
 
-A native desktop BlueSky/AT Protocol client built with **Tauri v2** (Rust) + **SolidJS**, focused on power-user features: multi-account, local semantic search, AT Protocol data exploration, and long-form content via standard.site lexicons.
+A native desktop BlueSky/AT Protocol client built with **Tauri v2** (Rust) + **SolidJS**, focused on power-user features: multi-account, local semantic search, AT Protocol data exploration, and Constellation-powered social diagnostics.
 
 ## Architecture
 
@@ -9,17 +9,20 @@ A native desktop BlueSky/AT Protocol client built with **Tauri v2** (Rust) + **S
 │  SolidJS Frontend (WebView)                 │
 │  ├─ Timeline / Feed views                   │
 │  ├─ AT Explorer (pds.ls-style)              │
+│  ├─ Social Diagnostics panel                │
 │  ├─ Search UI (FTS + semantic)              │
+│  ├─ Multicolumn deck view                   │
 │  └─ Account switcher                        │
 ├─────────────────────────────────────────────┤
 │  Tauri IPC (Commands + Events)              │
 ├─────────────────────────────────────────────┤
 │  Rust Backend                               │
-│  ├─ jacquard         — XRPC client + types  │
-│  ├─ jacquard::oauth   — OAuth 2.1 loopback  │
-│  ├─ rusqlite + sqlite-vec — local storage   │
-│  ├─ fastembed         — nomic-embed-text    │
-│  └─ tauri plugins     — deep-link, log,     │
+│  ├─ jacquard         - XRPC client + types  │
+│  ├─ jacquard::oauth   - OAuth 2.1 loopback  │
+│  ├─ rusqlite + sqlite-vec - local storage   │
+│  ├─ fastembed         - nomic-embed-text    │
+│  ├─ constellation     - backlink index API  │
+│  └─ tauri plugins     - deep-link, log,     │
 │                         updater             │
 └─────────────────────────────────────────────┘
 ```
@@ -34,6 +37,7 @@ A native desktop BlueSky/AT Protocol client built with **Tauri v2** (Rust) + **S
 | `sqlite-vec`             | Vector similarity search extension for SQLite                          |
 | `fastembed`              | Local ONNX inference for `nomic-embed-text-v1.5` embeddings            |
 | `tauri-plugin-deep-link` | Register `at://` URI scheme handler                                    |
+| `constellation`          | Constellation HTTP client for global ATProto backlink queries          |
 | `solid-motionone`        | Animation primitives (`Motion`, `Presence`) for SolidJS via Motion One |
 
 ## Cross-Cutting Concerns
@@ -54,5 +58,7 @@ Details in sub-specs:
 - [Authentication & Accounts](./auth.md)
 - [Feeds & Social](./feeds.md)
 - [AT Explorer](./explorer.md)
+- [Settings](./settings.md)
 - [Search & Embeddings](./search.md)
-- [standard.site Integration](./standard-site.md)
+- [Social Diagnostics](./social-diagnostics.md)
+- [Multicolumn Views](./multicolumn.md)
diff --git a/docs/specs/search.md b/docs/specs/search.md
index e63f0b8..0307d17 100644
--- a/docs/specs/search.md
+++ b/docs/specs/search.md
@@ -2,14 +2,14 @@
 
 Search has two scopes:
 
-1. **Network search**: server-side search via Bluesky APIs — no local indexing. Always available.
+1. **Network search**: server-side search via Bluesky APIs - no local indexing. Always available.
 2. **Local search**: full-text + semantic search over the **authenticated user's own** liked and bookmarked/saved posts, stored locally in SQLite.
 
 Local semantic search (embeddings) is **opt-out**: enabled by default, but can be disabled in settings. When disabled, only local keyword (FTS) search is available and the embedding model is not downloaded.
 
 ## Network Search (not indexed)
 
-Server-side Bluesky search APIs. These are thin wrappers — no local storage or indexing.
+Server-side Bluesky search APIs. These are thin wrappers - no local storage or indexing.
 
 ### `app.bsky.feed.searchPosts`
 
@@ -67,7 +67,7 @@ Returns `{ cursor?, starterPacks: StarterPackViewBasic[] }`.
 ## Local Data Pipeline
 
 1. **Sync**: on login and periodically, fetch the authenticated user's own likes (`app.bsky.feed.getActorLikes`) and bookmarks. Paginate using the API cursor, store posts in SQLite.
-2. **Cursor persistence**: store the last-seen API cursor per `(did, source)` in the `sync_state` table. On subsequent syncs, resume from the stored cursor so we only fetch new posts — never re-fetch the full history.
+2. **Cursor persistence**: store the last-seen API cursor per `(did, source)` in the `sync_state` table. On subsequent syncs, resume from the stored cursor so we only fetch new posts - never re-fetch the full history.
 3. **Index FTS**: insert post text into SQLite FTS5 virtual table for keyword search (always active).
 4. **Embed** _(opt-out)_: run post text through `fastembed` with `nomic-embed-text-v1.5` (768-dim). Store vectors in `sqlite-vec` virtual table. Skipped when embeddings are disabled.
 5. **Reindex**: a manual "Reindex" action clears all embeddings from `posts_vec` and re-embeds every post. Useful after model updates or if the index becomes corrupted.
@@ -100,7 +100,7 @@ CREATE TABLE sync_state (
 -- Full-text search (always active)
 CREATE VIRTUAL TABLE posts_fts USING fts5(text, uri UNINDEXED, content=posts, content_rowid=rowid);
 
--- Vector embeddings (opt-out — only populated when embeddings enabled)
+-- Vector embeddings (opt-out - only populated when embeddings enabled)
 CREATE VIRTUAL TABLE posts_vec USING vec0(
   uri TEXT PRIMARY KEY,
   embedding float[768]
@@ -111,7 +111,7 @@ CREATE VIRTUAL TABLE posts_vec USING vec0(
 
 | Mode     | Scope  | How                                                                                       |
 | -------- | ------ | ----------------------------------------------------------------------------------------- |
-| Network  | Remote | Server-side via Bluesky APIs (posts, actors, starter packs) — not indexed locally         |
+| Network  | Remote | Server-side via Bluesky APIs (posts, actors, starter packs) - not indexed locally         |
 | Keyword  | Local  | `SELECT * FROM posts_fts WHERE posts_fts MATCH ?`                                         |
 | Semantic | Local  | Embed query → `SELECT * FROM posts_vec WHERE embedding MATCH ? ORDER BY distance LIMIT k` |
 | Hybrid   | Local  | Run keyword + semantic, merge results by reciprocal rank fusion                           |
@@ -126,7 +126,7 @@ CREATE VIRTUAL TABLE posts_vec USING vec0(
 ## Tauri Commands
 
 ```rs
-// Network search (not indexed — direct API calls)
+// Network search (not indexed - direct API calls)
 search_posts_network(query: String, sort: Option<String>, limit: Option<u32>, cursor: Option<String>) -> NetworkSearchResult
 search_actors(query: String, limit: Option<u32>, cursor: Option<String>) -> ActorSearchResult
 search_starter_packs(query: String, limit: Option<u32>, cursor: Option<String>) -> StarterPackSearchResult
diff --git a/docs/specs/settings.md b/docs/specs/settings.md
new file mode 100644
index 0000000..68700ad
--- /dev/null
+++ b/docs/specs/settings.md
@@ -0,0 +1,149 @@
+# Settings
+
+Central configuration surface for the app. Settings are stored in the existing `app_settings` SQLite table (key-value) and take effect immediately — no save/apply button.
+
+## Storage
+
+The `app_settings` table already exists (migration `006_app_settings.sql`):
+
+```sql
+CREATE TABLE IF NOT EXISTS app_settings (
+  key   TEXT PRIMARY KEY,
+  value TEXT NOT NULL
+);
+```
+
+All settings are stored as text values. The backend exposes typed accessors that parse/serialize as needed (booleans as `"0"`/`"1"`, integers as decimal strings, JSON for structured values).
+
+### Settings Keys
+
+| Key                     | Type    | Default                                    | Description                                |
+| ----------------------- | ------- | ------------------------------------------ | ------------------------------------------ |
+| `theme`                 | string  | `"auto"`                                   | `"light"`, `"dark"`, or `"auto"` (OS sync) |
+| `timeline_refresh_secs` | integer | `60`                                       | Feed auto-refresh interval in seconds      |
+| `notifications_desktop` | boolean | `true`                                     | Show OS desktop notifications              |
+| `notifications_badge`   | boolean | `true`                                     | Show unread badge on app icon / tray       |
+| `notifications_sound`   | boolean | `false`                                    | Play sound on new notification             |
+| `embeddings_enabled`    | boolean | `true`                                     | Enable semantic search (already exists)    |
+| `constellation_url`     | string  | `"https://constellation.microcosm.blue"`   | Constellation instance base URL            |
+| `spacedust_url`         | string  | `"https://spacedust.microcosm.blue"`       | Spacedust instance base URL                |
+| `spacedust_instant`     | boolean | `false`                                    | Bypass Spacedust 21-second debounce buffer |
+| `spacedust_enabled`     | boolean | `false`                                    | Use Spacedust for real-time notifications  |
+| `global_shortcut`       | string  | `"Ctrl+Shift+N"`                           | Global composer shortcut                   |
+
+## Tauri Commands
+
+```rust
+// Read all settings as a typed struct
+get_settings() -> AppSettings
+
+// Update a single setting (validates key + value before persisting)
+update_setting(key: String, value: String) -> ()
+
+// Data management
+get_cache_size() -> CacheSize          // { feeds_bytes, embeddings_bytes, fts_bytes, total_bytes }
+clear_cache(scope: CacheClearScope) -> ()   // "all" | "feeds" | "embeddings" | "fts"
+export_data(format: ExportFormat, path: String) -> ()  // "json" | "csv"
+reset_app() -> ()                      // full wipe — requires confirmation on frontend
+
+// Log viewer
+get_log_entries(limit: u32, level: Option<String>) -> Vec<LogEntry>
+```
+
+## Sections
+
+### 1. Appearance
+
+Theme toggle: light / dark / auto (synced with OS).
+
+- Three-way segmented control, not a dropdown
+- `Motion` crossfade on the entire app surface when switching themes
+- Auto mode listens to `prefers-color-scheme` media query and Tauri's `Theme::changed` event
+
+### 2. Timeline
+
+Feed auto-refresh interval.
+
+- Segmented control: 30s, 1m, 2m, 5m, manual
+- "Manual" disables auto-refresh — user pulls to refresh or uses keyboard shortcut
+- Setting applies globally across all feed views and multicolumn feed columns
+
+### 3. Notifications
+
+- **Desktop notifications**: toggle OS-level notifications via `tauri-plugin-notification`
+- **Badge count**: toggle unread count on tray icon / dock badge
+- **Sound**: toggle notification sound (system default sound, not custom)
+
+### 4. Accounts
+
+Reuses the OAuth flow from the auth module (Task 02).
+
+- List of all linked accounts with avatar, handle, DID, and PDS URL
+- Active account indicator
+- "Add account" button → triggers OAuth loopback flow
+- "Remove account" → confirmation dialog → revoke tokens, delete stored data for that account
+- "Switch" action on each account row (also accessible from the sidebar account switcher)
+
+### 5. Search & Embeddings
+
+- **Embeddings toggle**: opt-out of semantic search. When disabled, the embedding model is not downloaded and only keyword search is available. Toggling off does not delete existing embeddings — a separate "Clear embeddings" action handles that.
+- **Model status**: shows whether `nomic-embed-text-v1.5` is downloaded, its size on disk, and a "Download now" / "Remove model" action
+- **Reindex**: triggers a full re-embed of all synced posts. Shows progress bar during operation.
+
+### 6. Services
+
+External service instance configuration for self-hosters.
+
+- **Constellation URL**: text input with URL validation. Default: `https://constellation.microcosm.blue`
+- **Spacedust URL**: text input with URL validation. Default: `https://spacedust.microcosm.blue`
+- **Spacedust real-time**: toggle to use Spacedust for push notifications vs. polling `listNotifications`
+- **Spacedust instant mode**: toggle to bypass the 21-second debounce buffer
+- Each URL field has a "Test connection" button that makes a health-check request and shows success/failure inline
+
+### 7. Data
+
+- **Cache size display**: breakdown by category (feeds, embeddings, FTS index) with total
+- **Clear cache**: scoped clearing — all, or by category. Confirmation dialog for "clear all"
+- **Export**: export user data (liked posts, bookmarks, settings) as JSON or CSV. Uses Tauri's save dialog to pick destination.
+- **Reset app**: full data wipe — drops all user tables, clears auth tokens, re-runs migrations. Behind a two-step confirmation: type "RESET" to confirm. This is the nuclear option.
+
+### 8. Logs
+
+In-app log viewer for debugging.
+
+- Reads log entries from `tauri-plugin-log` log files
+- Level filter: segmented control for `info`, `warn`, `error`, `all`
+- Scrollable log output in monospace, newest at top
+- "Copy all" and "Open log file" actions
+- Collapsible by default — expands inline within the settings view
+
+### 9. About
+
+- App version (from `tauri.conf.json`)
+- License (MIT)
+- Link to source repository
+- "Check for updates" button (triggers `tauri-plugin-updater` check)
+- Credits / contributors
+
+## Layout
+
+Settings is a single scrollable view, not a sidebar+content split. Each section is a `surface_container` card with `xl` radius, separated by `spacing-8` (2rem). Sections are ordered top-to-bottom as listed above.
+
+On narrow viewports, cards stack full-width. On wider viewports (> 768px), cards have a comfortable max-width (~640px) centered in the content area.
+
+## Keyboard Shortcuts
+
+| Key     | Action                        |
+| ------- | ----------------------------- |
+| `,`     | Open/focus settings from anywhere |
+| `Escape`| Close settings (navigate back)    |
+
+## UX Polish
+
+- `Presence` slide transitions when navigating to/from settings
+- Theme switch: `Motion` crossfade on the entire app surface
+- Destructive action modals: glass overlay (`surface_container_highest` at 70% + `backdrop-blur: 20px`)
+- Toggle switches: `Motion` spring on the thumb element
+- Cache size: animated number transitions when values update after clearing
+- Export/reindex: progress bars with percentage, cancelable where possible
+- Log viewer: smooth scroll, syntax-highlighted log levels
diff --git a/docs/specs/social-diagnostics.md b/docs/specs/social-diagnostics.md
new file mode 100644
index 0000000..687d166
--- /dev/null
+++ b/docs/specs/social-diagnostics.md
@@ -0,0 +1,147 @@
+# Social Diagnostics (Constellation-Powered)
+
+A tabbed panel surfacing social context and network-side artifacts for any account or record. Powered by [Constellation](https://constellation.microcosm.blue/) - a global ATProto backlink index.
+
+## Design Philosophy
+
+This feature exists to give users **context**, the goal being informed decision-making, understanding who someone is in the network before you follow, reply, or trust.
+
+**Guiding principles:**
+
+- **Inform, don't alarm.**
+  - Present data neutrally. Avoid language or visual treatments that frame normal social dynamics as threats (e.g., being on lists or being blocked is routine, not inherently suspicious).
+- **No composite risk scores.**
+  - Do not reduce a person's social standing to a number or traffic-light rating. Show the data; let the user interpret it.
+- **Context over counts.**
+  - A raw block count is meaningless without knowing the account's visibility. Prefer showing _what kind_ of lists/labels over _how many_.
+- **Discoverable, not pushed.**
+  - Diagnostics are available when sought, but the app should not proactively surface "warnings" about accounts in feeds or profiles. No unsolicited badges, banners, or alerts based on diagnostics data.
+- **Respect the viewed account.**
+  - This panel shows public protocol data, but the presentation should not feel like a dossier. Avoid dense tables of blockers/blocked. Default to aggregate summaries; expand to specifics only on request.
+- **Self-diagnostics first.**
+  - The most natural entry point is "what does the network say about _me_?" - help users understand their own footprint before inspecting others.
+
+## Constellation Integration
+
+Constellation indexes all references between AT Protocol records across the entire network. Lazurite queries it to answer "who/what points at this thing?" without running its own relay.
+
+### XRPC Endpoints Used
+
+| Endpoint                                   | Purpose                                              |
+| ------------------------------------------ | ---------------------------------------------------- |
+| `blue.microcosm.links.getBacklinksCount`   | Count backlinks from a specific collection+path      |
+| `blue.microcosm.links.getBacklinks`        | List backlink records (with pagination)              |
+| `blue.microcosm.links.getDistinct`         | Distinct DIDs linking to a target (with pagination)  |
+| `blue.microcosm.links.getManyToManyCounts` | Counts for join records (e.g., list items → lists)   |
+| `blue.microcosm.links.getManyToMany`       | List join records linking target to secondary target |
+
+All endpoints accept a `subject` (DID, AT-URI, or URL) and a `source` in `collection:path` format (e.g., `app.bsky.graph.listitem:subject`).
+
+### Constellation Client
+
+A thin HTTP client in `src-tauri/src/constellation.rs` targeting a configurable Constellation instance (default: `https://constellation.microcosm.blue`). User-configurable in settings to support self-hosted instances.
+
+## Tabs
+
+### 1. Lists
+
+What lists is this account on? Lists are how the network organizes and curates accounts - being on lists is normal and often positive (curation, topical grouping, community membership).
+
+**Query:** `getBacklinks` with `subject={DID}`, `source=app.bsky.graph.listitem:subject`
+→ extract list URIs from backlink records → hydrate via `app.bsky.graph.getList`
+
+**Display:**
+
+- List card: name, owner handle, description, purpose (curate/modlist/reference), member count
+- Sort by member count or recency
+- Grouped by purpose (curation lists vs. moderation lists vs. reference)
+- No aggregate "risk" scoring - show the lists and let the user read them
+
+### 2. Labels
+
+Labels are moderation metadata applied by labeling services. They affect content visibility and carry context about how the network's moderation infrastructure sees an account. Present them factually - a label is a data point, not a verdict.
+
+**Query:** `com.atproto.label.queryLabels` with subject DID (Bluesky API, not Constellation)
+
+**Display:**
+
+- Label chips with source attribution (which labeling service applied it)
+- Muted, uniform styling - avoid color-coding that implies judgment (no red/amber/green severity scale)
+- Tooltip with label definition, the labeling service that applied it, and what effect it has on visibility
+- If no labels: brief explanatory text about what labels are, not an empty state that implies "clean"
+
+### 3. Blocks & Boundaries
+
+Blocking is a normal, healthy social boundary. This tab helps users understand interaction boundaries - especially useful when replies or follows silently fail. The framing should be matter-of-fact, never voyeuristic.
+
+**Blocked-by (incoming):**
+Constellation indexes backlinks. A block record created by DID-A targeting DID-B has `subject: DID-B`. Querying backlinks to DID-B from `app.bsky.graph.block:subject` returns the blocking accounts.
+
+`getBacklinksCount` with `subject={DID}`, `source=app.bsky.graph.block:subject` → count
+`getDistinct` with same params → paginated list of DIDs
+
+**Blocking (outgoing):**
+Not available via Constellation backlinks (the account's own block records point away from them). Use `com.atproto.repo.listRecords` on the account's `app.bsky.graph.block` collection.
+
+**Display:**
+
+- Show counts only by default - no names, no profile cards on first load
+- "Show details" expands to a profile card list, with a brief note: _"Blocks are a normal part of social media. This data is public on the AT Protocol."_
+- No color-coding, warning banners, or language implying that high counts are abnormal
+- When viewing your own account: frame as "your boundaries" rather than "who blocked you"
+
+### 4. Starter Packs
+
+How are people discovering this account?
+
+**Query:** `getBacklinks` with `subject={DID}`, `source=app.bsky.graph.starterpack:listItemsSample[].subject`
+(Starter packs reference DIDs in their `listItemsSample` array.)
+
+Alternatively, check list memberships - starter packs are backed by lists, so list membership from tab 1 can be cross-referenced.
+
+**Display:**
+
+- Compact starter pack cards: title, creator, description, member count
+- Link to view full starter pack in AT Explorer
+
+### 5. Backlinks (Record Context)
+
+When viewing a specific record (post, profile, etc.), show all references to it.
+
+**Query:** `getBacklinks` with `subject={AT-URI}`, various sources:
+
+- `app.bsky.feed.like:subject.uri` - likes
+- `app.bsky.feed.repost:subject.uri` - reposts
+- `app.bsky.feed.post:reply.parent.uri` - direct replies
+- `app.bsky.feed.post:embed.record.uri` - quote posts
+
+**Display:**
+
+- Grouped by interaction type with counts
+- Expandable sections showing individual records/actors
+- Useful in AT Explorer record view as a supplementary panel
+
+## Integration Points
+
+- **Profile view**: "Context" tab alongside Posts/Replies/Media/Likes - available but not the default tab
+- **AT Explorer record view**: backlinks panel showing references to current record (engagement data, not moderation data)
+- **AT Explorer repo view**: follower/following counts from Constellation (no block counts in summary views - those belong in the dedicated diagnostics panel only)
+- **No feed-level enrichment**: diagnostics data should never appear inline on posts in feeds. Users navigate to it intentionally.
+
+## Keyboard Shortcuts
+
+| Key                  | Action                          |
+| -------------------- | ------------------------------- |
+| `CMD/CTRL` + `1`–`5` | Switch between diagnostics tabs |
+| `Escape`             | Close diagnostics panel         |
+
+## UX Polish
+
+- Tab switch: `Motion` sliding indicator underline
+- List/card loading: skeleton screens matching card dimensions
+- Detail expansion: `Presence` height animation with staggered card fade-in
+- Label chips: `Motion` scale-in on load
+- Counts: animated number transition (`Motion` on value change)
+- Error states: inline retry per section, not full-panel error
+- **Tone**: use neutral, descriptive copy throughout. Avoid words like "risk", "warning", "suspicious", "flagged". Prefer "context", "details", "public data"
+- **Progressive disclosure**: all sensitive sections (blocks, moderation labels) default to summary/count view. Expanding to specifics requires a deliberate click, with a brief contextualizing note
diff --git a/docs/specs/v0.2.md b/docs/specs/v0.2.md
index d6d22bc..d5f6c43 100644
--- a/docs/specs/v0.2.md
+++ b/docs/specs/v0.2.md
@@ -159,7 +159,7 @@ UFOs can serve recent records of any NSID it has seen.
 
 ## Phased Breakdown
 
-1. Phase 1 - lists, labels, blocked-by, starter packs (via Constellation + Bluesky APIs)
+1. Phase 1 - standard.site integration: publication/document views, subscriptions, reading view (see [standard-site.md](./standard-site.md))
 2. Phase 2 - profile history, apps & collections tab (via UFOs)
 3. Phase 3 - NSID explorer and collection insights (via UFOs)
 4. Phase 4 - network relationship diffs and provenance graphs (Constellation)
diff --git a/docs/tasks/01-backend-setup.md b/docs/tasks/01-backend-setup.md
index fb93121..ea87fc0 100644
--- a/docs/tasks/01-backend-setup.md
+++ b/docs/tasks/01-backend-setup.md
@@ -7,10 +7,10 @@ Spec: [mvp.md](../specs/mvp.md)
 - [x] Add Cargo dependencies: `jacquard`, `rusqlite` (bundled), `sqlite-vec`, `fastembed`, `tokio`
 - [x] Add Tauri plugins: `tauri-plugin-deep-link`, `tauri-plugin-notification`,  `tauri-plugin-log`
 - [x] Add frontend deps: `solid-motionone` (animation), install via npm
-- [x] Create `src-tauri/src/db.rs` — initialize SQLite, run migrations, load `sqlite-vec` extension
+- [x] Create `src-tauri/src/db.rs` - initialize SQLite, run migrations, load `sqlite-vec` extension
 - [x] Create migration system: `accounts`, `posts`, `posts_fts`, `posts_vec` tables
   - Embedded files via `include_str!` for SQL schema
-- [x] Create `src-tauri/src/state.rs` — `AppState` struct holding DB pool, active session, account list
+- [x] Create `src-tauri/src/state.rs` - `AppState` struct holding DB pool, active session, account list
 - [x] Register `AppState` as Tauri managed state
 - [x] Create Tauri command scaffold with error handling pattern using `thiserror` crate
 - [x] Set up dark/light theme: CSS custom properties, OS preference detection via `prefers-color-scheme`
diff --git a/docs/tasks/02-auth.md b/docs/tasks/02-auth.md
index 5c5284d..6b24876 100644
--- a/docs/tasks/02-auth.md
+++ b/docs/tasks/02-auth.md
@@ -11,8 +11,8 @@ Spec: [auth.md](../specs/auth.md)
   - Start loopback OAuth via `LoopbackConfig`
   - Store session tokens, insert into `accounts` table
   - Return account info to frontend
-- [x] Create Tauri command `logout(did: String)` — revoke tokens, remove from DB
-- [x] Create Tauri command `switch_account(did: String)` — swap active `OAuthSession` in state
+- [x] Create Tauri command `logout(did: String)` - revoke tokens, remove from DB
+- [x] Create Tauri command `switch_account(did: String)` - swap active `OAuthSession` in state
 - [x] Create Tauri command `list_accounts()` → `Vec<Account>`
 - [x] On app launch: restore sessions from DB, auto-refresh tokens for active account
 - [x] Register `at://` scheme via deep-link plugin in `tauri.conf.json`
diff --git a/docs/tasks/03-feeds.md b/docs/tasks/03-feeds.md
index ce6ffbb..d339698 100644
--- a/docs/tasks/03-feeds.md
+++ b/docs/tasks/03-feeds.md
@@ -4,39 +4,39 @@ Spec: [feeds.md](../specs/feeds.md)
 
 ## Steps
 
-### Backend — `src-tauri/src/feed.rs`
-
-- [x] `get_preferences()` — calls `app.bsky.actor.getPreferences`, extracts `savedFeedsPrefV2` items and `feedViewPref` entries
-- [x] `get_feed_generators(uris: Vec<String>)` — calls `app.bsky.feed.getFeedGenerators` to hydrate display names/avatars
-- [x] `get_timeline(cursor: Option<String>, limit: u32)` — calls `app.bsky.feed.getTimeline`
-- [x] `get_feed(uri: String, cursor: Option<String>, limit: u32)` — calls `app.bsky.feed.getFeed` for custom feed generators
-- [x] `get_list_feed(uri: String, cursor: Option<String>, limit: u32)` — calls `app.bsky.feed.getListFeed`
-- [x] `get_post_thread(uri: String)` — thread view
+### Backend - `src-tauri/src/feed.rs`
+
+- [x] `get_preferences()` - calls `app.bsky.actor.getPreferences`, extracts `savedFeedsPrefV2` items and `feedViewPref` entries
+- [x] `get_feed_generators(uris: Vec<String>)` - calls `app.bsky.feed.getFeedGenerators` to hydrate display names/avatars
+- [x] `get_timeline(cursor: Option<String>, limit: u32)` - calls `app.bsky.feed.getTimeline`
+- [x] `get_feed(uri: String, cursor: Option<String>, limit: u32)` - calls `app.bsky.feed.getFeed` for custom feed generators
+- [x] `get_list_feed(uri: String, cursor: Option<String>, limit: u32)` - calls `app.bsky.feed.getListFeed`
+- [x] `get_post_thread(uri: String)` - thread view
 - [x] `get_author_feed(did: String, cursor: Option<String>)`
-- [x] `create_post(text: String, reply_to: Option<ReplyRef>, embed: Option<Embed>)` — with richtext facet detection via `jacquard::richtext`
+- [x] `create_post(text: String, reply_to: Option<ReplyRef>, embed: Option<Embed>)` - with richtext facet detection via `jacquard::richtext`
 - [x] `like_post(uri: String, cid: String)` / `unlike_post(uri: String)`
 - [x] `repost(uri: String, cid: String)` / `unrepost(uri: String)`
 
-### Frontend — Feed Tabs & Content
+### Frontend - Feed Tabs & Content
 
-- [x] Feed tab bar — pinned feeds as tabs, hydrated with generator display names/avatars; `1`–`9` keyboard shortcuts to switch
-- [x] Feed content loader — dispatches to correct endpoint based on feed type (`timeline` / `feed` / `list`)
+- [x] Feed tab bar - pinned feeds as tabs, hydrated with generator display names/avatars; `1`–`9` keyboard shortcuts to switch
+- [x] Feed content loader - dispatches to correct endpoint based on feed type (`timeline` / `feed` / `list`)
 - [x] Infinite scroll with cursor pagination and scroll-position preservation
 - [x] `Presence` crossfade animation on tab switch
 - [x] Skeleton screens while feeds load
 
-### Frontend — Post Card & Actions
+### Frontend - Post Card & Actions
 
-- [x] Post card component (author, text, embeds, timestamps, action bar) — `Motion` fade-in on viewport enter
+- [x] Post card component (author, text, embeds, timestamps, action bar) - `Motion` fade-in on viewport enter
 - [x] Like/repost icon `Motion` scale pop animation (1.0 -> 1.3 -> 1.0)
 - [x] `j/k` keyboard navigation between posts, `l` like, `r` reply, `t` repost, `o` open thread
 
-### Frontend — Thread View
+### Frontend - Thread View
 
 - [x] Thread view with nested replies
 - [x] Navigate into thread from post card (`o` / `Enter`) with route-backed thread URLs
 
-### Frontend — Post Composer
+### Frontend - Post Composer
 
 - [x] Composer with `Presence` slide-up/down, `n` keyboard shortcut to open
 - [x] Mention/hashtag autocomplete
@@ -44,7 +44,7 @@ Spec: [feeds.md](../specs/feeds.md)
 - [x] Quote post embed
 - [x] Tray button and global keyboard shortcut to open composer from anywhere
 
-### Frontend — Feed Preferences
+### Frontend - Feed Preferences
 
 - [x] Per-feed display toggles (hide reposts/replies/quotes) via `feedViewPref`
 - [x] Feeds drawer for accessing saved (unpinned) feeds
diff --git a/docs/tasks/04-notifications.md b/docs/tasks/04-notifications.md
index a6aa624..e1eee13 100644
--- a/docs/tasks/04-notifications.md
+++ b/docs/tasks/04-notifications.md
@@ -8,15 +8,15 @@ Spec: [feeds.md](../specs/feeds.md)
 
 - [x] Create `src-tauri/src/notifications.rs`
   - `src-tauri/src/commands/notifications.rs` for Tauri commands
-- [x] `list_notifications(cursor: Option<String>)` — `app.bsky.notification.listNotifications`
-- [x] `update_seen()` — `app.bsky.notification.updateSeen`
-- [x] `get_unread_count()` — `app.bsky.notification.getUnreadCount`
+- [x] `list_notifications(cursor: Option<String>)` - `app.bsky.notification.listNotifications`
+- [x] `update_seen()` - `app.bsky.notification.updateSeen`
+- [x] `get_unread_count()` - `app.bsky.notification.getUnreadCount`
 - [x] Background polling: spawn async task on login, poll every 30s, emit Tauri event on new notifications
 - [x] System notifications via `tauri-plugin-notification` for mentions when app is in background
 
 ## Frontend
 
-- [x] notifications panel with two tabs — Mentions / Activity (Aeronaut pattern)
+- [x] notifications panel with two tabs - Mentions / Activity (Aeronaut pattern)
 - [x] unread badge on sidebar notification icon with `Motion` scale-in pop
 - [x] new notification items `Motion` slide-in from top
 - [x] tab switch `Presence` crossfade between Mentions/Activity
diff --git a/docs/tasks/05-explorer.md b/docs/tasks/05-explorer.md
index 7a356a6..9369b9d 100644
--- a/docs/tasks/05-explorer.md
+++ b/docs/tasks/05-explorer.md
@@ -22,11 +22,3 @@ Spec: [explorer.md](../specs/explorer.md)
 - [x] **Frontend**: breadcrumb navigation bar with `Motion` width animation on segment changes
 - [x] **Frontend**: `Presence` crossfade transitions between explorer view levels
 - [x] **Frontend**: keyboard shortcuts - `Backspace` up a level, `Cmd+[/]` back/forward
-- [ ] **Frontend**: Jetstream live-tail view with `Motion` slide-in for new records
-
-### Parking Lot
-
-These require update to the spec & more research before implementation.
-
-- [ ] **Frontend**: Firehose Viewer
-- [ ] **Frontend**: [Spacedust](https://spacedust.microcosm.blue/) Viewer
diff --git a/docs/tasks/06-settings.md b/docs/tasks/06-settings.md
new file mode 100644
index 0000000..0991828
--- /dev/null
+++ b/docs/tasks/06-settings.md
@@ -0,0 +1,31 @@
+# Task 06: Settings
+
+Spec: [settings.md](../specs/settings.md)
+
+## Steps
+
+### Backend - `src-tauri/src/settings.rs`
+
+- [ ] `get_settings()` - read user preferences from SQLite `settings` table, return as typed struct
+- [ ] `update_setting(key: String, value: String)` - upsert a key-value pair in `settings` table
+- [ ] `clear_cache()` - delete cached feed data, embedded vectors, and FTS5 index; vacuum database
+- [ ] `reset_app()` - drop all user data tables and re-run migrations; clear auth tokens
+- [ ] `export_data(format: String, path: String)` - export user data as JSON or CSV to chosen path
+- [ ] `get_log_entries(limit: u32, level: Option<String>)` - read recent log entries for the in-app log viewer
+- [ ] SQLite migration: `settings` table (`key TEXT PRIMARY KEY, value TEXT, updated_at TEXT`)
+
+### Frontend - Settings View
+
+- [ ] Settings route (`/settings`) accessible from app rail icon (`i-ri-settings-3-line`)
+- [ ] Section-based layout using `surface_container` cards with `xl` radius:
+  1. **Appearance** - Theme toggle (light/dark/auto), `Motion` crossfade on theme switch
+  2. **Timeline** - Refresh interval selector (30s, 1m, 2m, 5m, manual)
+  3. **Notifications** - Toggle desktop notifications, badge count, notification sound
+  4. **Data** - Clear cache (with size display), export (JSON/CSV), reset app (with confirmation dialog)
+  5. **Accounts** - List active accounts, add/remove account flows (reuses OAuth from Task 02)
+  6. **Logs** - Collapsible log viewer with level filtering (`info`, `warn`, `error`)
+  7. **Services** - Constellation instance URL, Spacedust instance URL
+  8. **About** - Version info, license (MIT), contributors, support links
+- [ ] `Presence` slide transitions between setting sections
+- [ ] Keyboard shortcut: `,` to open settings from anywhere
+- [ ] Confirmation modal for destructive actions (clear cache, reset app, remove account) using glass overlay
diff --git a/docs/tasks/06-search.md b/docs/tasks/07-search.md
similarity index 99%
rename from docs/tasks/06-search.md
rename to docs/tasks/07-search.md
index 0fecabb..29a5d97 100644
--- a/docs/tasks/06-search.md
+++ b/docs/tasks/07-search.md
@@ -1,4 +1,4 @@
-# Task 06: Search & Embeddings
+# Task 07: Search & Embeddings
 
 Spec: [search.md](../specs/search.md)
 
diff --git a/docs/tasks/07-standard-site.md b/docs/tasks/07-standard-site.md
deleted file mode 100644
index fdad00d..0000000
--- a/docs/tasks/07-standard-site.md
+++ /dev/null
@@ -1,19 +0,0 @@
-# Task 07: Standard.site Integration
-
-Spec: [standard-site.md](../specs/standard-site.md)
-
-## Steps
-
-- [ ] Create `src-tauri/src/publications.rs`
-- [ ] `get_publications(did: String)` — list `site.standard.publication` records from repo
-- [ ] `get_documents(did: String, cursor: Option<String>)` — list `site.standard.document` records
-- [ ] `get_document(did: String, rkey: String)` — fetch single document content
-- [ ] `subscribe_publication(did: String, rkey: String)` — create `site.standard.graph.subscription` record
-- [ ] `unsubscribe_publication(uri: String)` — delete subscription record
-- [ ] `list_subscriptions()` — list user's publication subscriptions
-- [ ] **Frontend**: publication card with `Motion` scale-up on hover
-- [ ] **Frontend**: document list with staggered `Motion` fade-in
-- [ ] **Frontend**: markdown reader view with `Presence` slide-in from right
-- [ ] **Frontend**: subscribe/unsubscribe `Motion` pop on icon toggle
-- [ ] **Frontend**: "Publications" tab on profile views (when records exist)
-- [ ] **Search integration**: index document text in `posts_fts` and `posts_vec`
diff --git a/docs/tasks/08-settings.md b/docs/tasks/08-settings.md
deleted file mode 100644
index b6ae845..0000000
--- a/docs/tasks/08-settings.md
+++ /dev/null
@@ -1,30 +0,0 @@
-# Task 08: Settings
-
-Spec: TBD
-
-## Steps
-
-### Backend — `src-tauri/src/settings.rs`
-
-- [ ] `get_settings()` — read user preferences from SQLite `settings` table, return as typed struct
-- [ ] `update_setting(key: String, value: String)` — upsert a key-value pair in `settings` table
-- [ ] `clear_cache()` — delete cached feed data, embedded vectors, and FTS5 index; vacuum database
-- [ ] `reset_app()` — drop all user data tables and re-run migrations; clear auth tokens
-- [ ] `export_data(format: String, path: String)` — export user data as JSON or CSV to chosen path
-- [ ] `get_log_entries(limit: u32, level: Option<String>)` — read recent log entries for the in-app log viewer
-- [ ] SQLite migration: `settings` table (`key TEXT PRIMARY KEY, value TEXT, updated_at TEXT`)
-
-### Frontend — Settings View
-
-- [ ] Settings route (`/settings`) accessible from app rail icon (`i-ri-settings-3-line`)
-- [ ] Section-based layout using `surface_container` cards with `xl` radius:
-  1. **Appearance** — Theme toggle (light/dark/auto), `Motion` crossfade on theme switch
-  2. **Timeline** — Refresh interval selector (30s, 1m, 2m, 5m, manual)
-  3. **Notifications** — Toggle desktop notifications, badge count, notification sound
-  4. **Data** — Clear cache (with size display), export (JSON/CSV), reset app (with confirmation dialog)
-  5. **Accounts** — List active accounts, add/remove account flows (reuses OAuth from Task 02)
-  6. **Logs** — Collapsible log viewer with level filtering (`info`, `warn`, `error`)
-  7. **About** — Version info, license (MIT), contributors, support links
-- [ ] `Presence` slide transitions between setting sections
-- [ ] Keyboard shortcut: `,` to open settings from anywhere
-- [ ] Confirmation modal for destructive actions (clear cache, reset app, remove account) using glass overlay
diff --git a/docs/tasks/08-social-diagnostics.md b/docs/tasks/08-social-diagnostics.md
new file mode 100644
index 0000000..f21a713
--- /dev/null
+++ b/docs/tasks/08-social-diagnostics.md
@@ -0,0 +1,86 @@
+# Task 08: Social Diagnostics
+
+Spec: [social-diagnostics.md](../specs/social-diagnostics.md)
+
+## Steps
+
+### Backend - Constellation Client (`src-tauri/src/constellation.rs`)
+
+- [ ] Constellation HTTP client struct with configurable base URL (default: `https://constellation.microcosm.blue`)
+- [ ] `get_backlinks_count(subject: String, source: String)` - `blue.microcosm.links.getBacklinksCount`
+- [ ] `get_backlinks(subject: String, source: String, limit: Option<u32>)` - `blue.microcosm.links.getBacklinks`
+- [ ] `get_distinct_dids(subject: String, source: String, limit: Option<u32>, cursor: Option<String>)` - `blue.microcosm.links.getDistinct`
+- [ ] `get_many_to_many_counts(subject: String, source: String, path_to_other: String)` - `blue.microcosm.links.getManyToManyCounts`
+- [ ] `get_many_to_many(subject: String, source: String, path_to_other: String, limit: Option<u32>)` - `blue.microcosm.links.getManyToMany`
+
+### Backend - Diagnostics Commands (`src-tauri/src/commands/diagnostics.rs`)
+
+- [ ] `get_account_lists(did: String)` - query Constellation for `app.bsky.graph.listitem:subject` backlinks, extract list URIs, hydrate via `app.bsky.graph.getList`
+- [ ] `get_account_labels(did: String)` - query `com.atproto.label.queryLabels` (Bluesky API)
+- [ ] `get_account_blocked_by(did: String, limit: Option<u32>, cursor: Option<String>)` - Constellation `getDistinct` for `app.bsky.graph.block:subject`
+- [ ] `get_account_blocking(did: String, cursor: Option<String>)` - `com.atproto.repo.listRecords` on target's `app.bsky.graph.block` collection
+- [ ] `get_account_starter_packs(did: String)` - Constellation backlinks from starter pack collections
+- [ ] `get_record_backlinks(uri: String)` - Constellation backlinks grouped by interaction type (likes, reposts, replies, quotes)
+
+### Backend - Settings
+
+- [ ] `constellation_url` field in settings table (default: `https://constellation.microcosm.blue`)
+- [ ] `set_constellation_url(url: String)` / `get_constellation_url()` commands
+
+### Frontend - Diagnostics Panel
+
+- [ ] Tabbed panel component with 5 tabs: Lists, Labels, Blocks, Starter Packs, Backlinks
+- [ ] Tab switching with `Motion` sliding indicator underline
+- [ ] Number key shortcuts (`1`–`5`) for tab switching
+- [ ] `Escape` to close panel
+
+### Frontend - Lists Tab
+
+- [ ] List cards: name, owner, description, purpose badge, member count
+- [ ] Grouped by purpose (curation / moderation / reference)
+- [ ] Skeleton loading matching card dimensions
+- [ ] Neutral framing - no aggregate risk scoring or warning badges
+
+### Frontend - Labels Tab
+
+- [ ] Label chips with source attribution (labeling service name)
+- [ ] Uniform muted styling - no severity color-coding
+- [ ] Tooltip with label definition, source, and visibility effect
+- [ ] Explanatory empty state (what labels are, not "no labels found")
+- [ ] `Motion` scale-in on load
+
+### Frontend - Blocks Tab
+
+- [ ] Counts-only default view (no names or profile cards on first load)
+- [ ] "Show details" expand with contextualizing copy (*"Blocks are a normal part of social media..."*)
+- [ ] `Presence` height animation on expand with staggered card fade-in
+- [ ] No warning banners, color-coding, or language implying abnormality
+- [ ] Self-view framing: "Your boundaries" (not "Who blocked you")
+
+### Frontend - Starter Packs Tab
+
+- [ ] Compact starter pack cards: title, creator, description, member count
+- [ ] Link to view in AT Explorer
+
+### Frontend - Backlinks Tab (Record Context)
+
+- [ ] Grouped by type: likes, reposts, replies, quote posts
+- [ ] Count per type with expandable sections
+- [ ] Individual actor/record cards within sections
+
+### Frontend - Integration Points
+
+- [ ] Profile view: "Context" tab (alongside Posts/Replies/Media/Likes) - not the default tab
+- [ ] AT Explorer record view: backlinks supplementary panel (engagement data only, no moderation data)
+- [ ] AT Explorer repo view: follower/following counts from Constellation (no block counts in summaries)
+
+### UX Tone Review
+
+- [ ] Audit all copy for neutral language - no "risk", "warning", "suspicious", "flagged"
+- [ ] Ensure all sensitive sections use progressive disclosure (summary → details on click)
+- [ ] Verify self-view ("my account") uses empowering framing, not anxiety-inducing
+
+### Parking Lot
+
+- [ ] Network relationship diff over time (requires historical snapshots)
+- [ ] Profile/identity history timeline (handle/DID/PDS changes)
diff --git a/docs/tasks/09-jetstream.md b/docs/tasks/09-jetstream.md
new file mode 100644
index 0000000..01b5465
--- /dev/null
+++ b/docs/tasks/09-jetstream.md
@@ -0,0 +1,29 @@
+# Task 09: Jetstream
+
+Spec: [explorer.md](../specs/explorer.md)
+
+## Tasks
+
+### Backend - Jetstream (`src-tauri/src/jetstream.rs`)
+
+- [ ] `jetstream_subscribe(config: JetstreamConfig)` - open a WebSocket connection to a Jetstream instance via `jacquard::jetstream`, emit Tauri events for each incoming record
+  - `JetstreamConfig`: `{ url: String, collections: Option<Vec<String>>, dids: Option<Vec<String>> }` - filter by collection NSIDs and/or DIDs
+- [ ] `jetstream_unsubscribe()` - close the active WebSocket connection, clean up
+- [ ] Tauri event emission: `jetstream:record` with serialized record payload (collection, rkey, DID, operation, record JSON)
+- [ ] Connection lifecycle events: `jetstream:connected`, `jetstream:disconnected`, `jetstream:error`
+- [ ] Reconnection with backoff on disconnect (reuse `jacquard::jetstream` reconnect behavior if available)
+
+### Frontend - Jetstream Live-Tail
+
+- [ ] Jetstream live-tail view with `Motion` slide-in for new records
+- [ ] Filter controls: collection NSID filter, DID filter, operation type (create/update/delete)
+- [ ] Pause/resume button to freeze the stream without disconnecting
+- [ ] Record count and events-per-second indicator
+- [ ] Click record to navigate to its full record view in the explorer
+
+### Parking Lot
+
+These require update to the spec & more research before implementation.
+
+- [ ] **Frontend**: Firehose Viewer
+- [ ] **Frontend**: Spacedust integration (see [Task 10](./10-spacedust.md))
diff --git a/docs/tasks/10-spacedust.md b/docs/tasks/10-spacedust.md
new file mode 100644
index 0000000..2a89d48
--- /dev/null
+++ b/docs/tasks/10-spacedust.md
@@ -0,0 +1,53 @@
+# Task 10: Spacedust
+
+Spec: TBD (see [Spacedust API docs](../../.sandbox/spacedust.md))
+
+## Overview
+
+[Spacedust](https://spacedust.microcosm.blue/) is a configurable ATProto notifications firehose by microcosm.blue. It streams real-time backlink events (likes, reposts, follows, replies, etc.) for specific subjects, with a built-in 21-second debounce buffer to filter out quickly-undone interactions.
+
+Where Jetstream (Task 09) streams raw firehose records, Spacedust streams *resolved backlinks* - making it ideal for live notification feeds and real-time engagement counters.
+
+## Tasks
+
+### Backend - Spacedust Client (`src-tauri/src/spacedust.rs`)
+
+- [ ] Spacedust WebSocket client struct with configurable base URL (default: `https://spacedust.microcosm.blue`)
+- [ ] `spacedust_subscribe(config: SpacedustConfig)` - open WebSocket to `/subscribe` with query params:
+  - `wantedSources`: link sources to receive (e.g., `app.bsky.feed.like:subject.uri`)
+  - `wantedSubjectDids`: DIDs to receive links about
+  - `wantedSubjects`: AT-URIs to receive links about (URL-encoded)
+  - `instant`: optional boolean to bypass the 21-second delay buffer
+- [ ] `spacedust_unsubscribe()` - close WebSocket, clean up
+- [ ] Tauri event emission: `spacedust:link` with payload (source collection+path, subject, linking DID, operation)
+- [ ] Connection lifecycle events: `spacedust:connected`, `spacedust:disconnected`, `spacedust:error`
+- [ ] Reconnection with backoff on disconnect
+
+### Backend - Notification Integration
+
+- [ ] On login, auto-subscribe to Spacedust for the authenticated user's DID with common social sources:
+  - `app.bsky.feed.like:subject.uri` (likes on your posts)
+  - `app.bsky.feed.repost:subject.uri` (reposts)
+  - `app.bsky.feed.post:reply.parent.uri` (replies)
+  - `app.bsky.graph.follow:subject` (new followers)
+- [ ] Map incoming Spacedust events to notification records in SQLite
+- [ ] Deduplicate with existing notifications from `app.bsky.notification.listNotifications`
+
+### Frontend - Live Engagement (Explorer Integration)
+
+- [ ] When viewing a record in AT Explorer, optionally subscribe to Spacedust for that record's URI
+- [ ] Real-time counter updates (likes, reposts, replies ticking up) via `Motion` number transition
+- [ ] Toggle: "Watch live" button to start/stop per-record subscription
+- [ ] Visual pulse on counter increment
+
+### Frontend - Settings
+
+- [ ] Spacedust instance URL configuration (alongside Constellation URL in settings)
+- [ ] Toggle: use Spacedust for real-time notifications (vs. polling `listNotifications`)
+- [ ] Toggle: `instant` mode (bypass 21-second buffer - faster but noisier)
+
+### Parking Lot
+
+- [ ] Spacedust as a column type in multicolumn view (live notification stream)
+- [ ] Aggregate Spacedust events into a "live activity" dashboard
+- [ ] Spacedust for real-time search result updates
diff --git a/docs/tasks/09-multicolumn.md b/docs/tasks/11-multicolumn.md
similarity index 69%
rename from docs/tasks/09-multicolumn.md
rename to docs/tasks/11-multicolumn.md
index b980082..c003b3c 100644
--- a/docs/tasks/09-multicolumn.md
+++ b/docs/tasks/11-multicolumn.md
@@ -1,6 +1,6 @@
-# Task 09: Multicolumn Views
+# Task 11: Multicolumn Views
 
-Spec: TBD
+Spec: [multicolumn.md](../specs/multicolumn.md)
 
 ## Overview
 
@@ -8,19 +8,19 @@ TweetDeck-style multicolumn layout allowing users to view multiple feeds and/or
 
 ## Steps
 
-### Backend — `src-tauri/src/columns.rs`
+### Backend - `src-tauri/src/columns.rs`
 
 - [ ] SQLite migration: `columns` table (`id TEXT PRIMARY KEY, account_did TEXT, kind TEXT, config TEXT, position INTEGER, width TEXT, created_at TEXT`)
-  - `kind`: `feed` | `explorer` — determines the column type
-  - `config`: JSON blob — for feeds: `{ feed_uri, feed_type }`, for explorer: `{ target_uri }`
+  - `kind`: `feed` | `explorer` | `diagnostics` - determines the column type
+  - `config`: JSON blob - for feeds: `{ feed_uri, feed_type }`, for explorer: `{ target_uri }`, for diagnostics: `{ did }`
   - `width`: `narrow` | `standard` | `wide`
-- [ ] `get_columns(account_did: String)` — return ordered column list for the active account
-- [ ] `add_column(account_did: String, kind: String, config: String, position: Option<u32>)` — insert at position or append
-- [ ] `remove_column(id: String)` — delete column by ID
-- [ ] `reorder_columns(ids: Vec<String>)` — bulk update positions
-- [ ] `update_column(id: String, config: Option<String>, width: Option<String>)` — modify column settings
+- [ ] `get_columns(account_did: String)` - return ordered column list for the active account
+- [ ] `add_column(account_did: String, kind: String, config: String, position: Option<u32>)` - insert at position or append
+- [ ] `remove_column(id: String)` - delete column by ID
+- [ ] `reorder_columns(ids: Vec<String>)` - bulk update positions
+- [ ] `update_column(id: String, config: Option<String>, width: Option<String>)` - modify column settings
 
-### Frontend — Column Layout
+### Frontend - Column Layout
 
 - [ ] Multicolumn route (`/deck`) accessible from app rail icon (`i-ri-layout-column-line`)
 - [ ] Horizontal scrolling container with snap points per column
@@ -30,7 +30,7 @@ TweetDeck-style multicolumn layout allowing users to view multiple feeds and/or
 - [ ] `Presence` scale-in animation when adding a column, scale-out on removal
 - [ ] Responsive: collapse to single-column on narrow windows with horizontal swipe navigation
 
-### Frontend — Column Types
+### Frontend - Column Types
 
 #### Feed Column
 
@@ -45,14 +45,21 @@ TweetDeck-style multicolumn layout allowing users to view multiple feeds and/or
 - [ ] Independent navigation stack per column (breadcrumbs, back/forward)
 - [ ] Compact record rendering mode for narrower column widths
 
-### Frontend — Column Management
+#### Diagnostics Column
+
+- [ ] Reuse social diagnostics panel from Task 08
+- [ ] Tab navigation within column for lists/labels/blocks/starter packs/backlinks
+- [ ] Compact card layout adapted to column width
+
+### Frontend - Column Management
 
 - [ ] "Add column" button (`i-ri-add-line`) opens a picker panel:
   - Feed picker: lists pinned feeds, saved feeds, list feeds
   - Explorer picker: input field for at:// URI, handle, DID, or PDS URL
+  - Diagnostics picker: input field for handle or DID
 - [ ] Right-click column header for context menu (resize, duplicate, close)
 - [ ] Keyboard shortcuts: `Ctrl+Shift+N` add column, `Ctrl+Shift+W` close focused column, `Ctrl+[/]` focus prev/next column
-- [ ] Persist column layout to SQLite per account — restore on app launch
+- [ ] Persist column layout to SQLite per account - restore on app launch
 
 ### Parking Lot
 
diff --git a/docs/tasks/10-release.md b/docs/tasks/12-release.md
similarity index 85%
rename from docs/tasks/10-release.md
rename to docs/tasks/12-release.md
index b5bd4c6..97d43f9 100644
--- a/docs/tasks/10-release.md
+++ b/docs/tasks/12-release.md
@@ -1,4 +1,4 @@
-# Task 10: Release
+# Task 12: Release
 
 ## Overview
 
@@ -12,20 +12,20 @@ Cross-platform build, signing, packaging, and auto-update pipeline targeting mac
   - macOS: `icon.icns` (16–1024px)
   - Windows: `icon.ico` (16–256px)
   - Linux: `icon.png` at 32, 128, 256, 512px
-- [ ] Update `tauri.conf.json` — `productName`, `identifier`, window title, bundle metadata (description, copyright, category)
+- [ ] Update `tauri.conf.json` - `productName`, `identifier`, window title, bundle metadata (description, copyright, category)
 - [ ] Splash / welcome screen for first-launch flow
 
 ### macOS
 
 - [ ] Code signing via Apple Developer certificate (`APPLE_CERTIFICATE`, `APPLE_CERTIFICATE_PASSWORD` secrets)
 - [ ] Notarization via `notarytool` (`APPLE_ID`, `APPLE_PASSWORD`, `APPLE_TEAM_ID` secrets)
-- [ ] DMG packaging — `tauri build` produces `.dmg` by default on macOS
+- [ ] DMG packaging - `tauri build` produces `.dmg` by default on macOS
 - [ ] Universal binary (x86_64 + aarch64) via `--target universal-apple-darwin`
 - [ ] Verify Gatekeeper passes on clean macOS install
 
 ### Windows
 
-- [ ] NSIS installer — `tauri build` default on Windows; configure install path, start menu shortcut, desktop shortcut
+- [ ] NSIS installer - `tauri build` default on Windows; configure install path, start menu shortcut, desktop shortcut
 - [ ] Optional: MSI installer via `bundle > targets` configuration
 - [ ] Code signing via certificate (`WINDOWS_CERTIFICATE`, `WINDOWS_CERTIFICATE_PASSWORD` secrets)
   - Evaluate EV vs OV certificate for SmartScreen reputation
@@ -34,13 +34,13 @@ Cross-platform build, signing, packaging, and auto-update pipeline targeting mac
 
 ### Linux
 
-- [ ] AppImage packaging — portable, no-install binary (primary distribution format)
-- [ ] `.deb` package for Debian/Ubuntu — configure dependencies (libwebkit2gtk, libssl)
+- [ ] AppImage packaging - portable, no-install binary (primary distribution format)
+- [ ] `.deb` package for Debian/Ubuntu - configure dependencies (libwebkit2gtk, libssl)
 - [ ] `.rpm` package for Fedora/RHEL
 - [ ] Desktop entry file with icon, categories, and MIME type for `at://` deep links
 - [ ] Verify launch on Ubuntu 22.04+, Fedora 38+, and Arch (via AppImage)
 
-### Auto-Update — `tauri-plugin-updater`
+### Auto-Update - `tauri-plugin-updater`
 
 - [ ] Add `tauri-plugin-updater` to `Cargo.toml` dependencies (currently commented out)
 - [ ] Configure update endpoint pointing to GitHub Releases (`latest.json` / release assets)
@@ -49,7 +49,7 @@ Cross-platform build, signing, packaging, and auto-update pipeline targeting mac
 - [ ] Differential updates where supported (Tauri v2 update mechanism)
 - [ ] Signing update bundles with Tauri's update keypair (`TAURI_SIGNING_PRIVATE_KEY`, `TAURI_SIGNING_PRIVATE_KEY_PASSWORD`)
 
-### CI/CD — GitHub Actions
+### CI/CD - GitHub Actions
 
 - [ ] Matrix build workflow: `[macos-latest, windows-latest, ubuntu-latest]`
   - macOS job: build universal binary, sign, notarize, produce `.dmg`
diff --git a/docs/tasks/mvp.md b/docs/tasks/mvp.md
index 4be1c10..a5fa7e2 100644
--- a/docs/tasks/mvp.md
+++ b/docs/tasks/mvp.md
@@ -12,17 +12,22 @@ Tasks are grouped by module. Each references the relevant spec. Polish (keyboard
 - [Feeds](./03-feeds.md) - Pinned feed tabs, post rendering, composer, keyboard shortcuts, scroll animations
 - [Notifications](./04-notifications.md) - Mentions, activity, system notifications, badge animations
 
-## Phase 3: Power Features
+## Phase 3: Core Features
 
 - [AT Explorer](./05-explorer.md) - pds.ls-style data browser, at:// deep links, view transitions, keyboard nav
-- [Search & Embeddings](./06-search.md) - FTS5, fastembed, sqlite-vec, sync pipeline, result animations
+- [Settings](./06-settings.md) - Theme, notifications, data export, cache management, account management, Constellation/Spacedust instance, logs
 
-## Phase 4: Long-Form & Polish
+## Phase 4: Power Features
 
-- [Standard.site](./07-standard-site.md) - Publication/document views, subscriptions, reading view transitions
-- [Settings](./08-settings.md) - Theme, notifications, data export, cache management, account management, logs
-- [Multicolumn Views](./09-multicolumn.md) - TweetDeck-style side-by-side feeds and AT Explorer panels
+- [Search & Embeddings](./07-search.md) - FTS5, fastembed, sqlite-vec, sync pipeline, result animations
+- [Social Diagnostics](./08-social-diagnostics.md) - Constellation-powered lists, labels, blocks, starter packs, backlinks
 
-## Phase 5: Release
+## Phase 5: Live Data
 
-- [Release](./10-release.md) - Cross-platform build (macOS, Windows, Linux), code signing, auto-update, CI/CD
+- [Jetstream](./09-jetstream.md) - WebSocket live-tail of AT Protocol firehose, filtered record streaming
+- [Spacedust](./10-spacedust.md) - Real-time backlink notifications via microcosm Spacedust
+
+## Phase 6: Polish & Release
+
+- [Multicolumn Views](./11-multicolumn.md) - TweetDeck-style side-by-side feeds, explorer, and diagnostics panels
+- [Release](./12-release.md) - Cross-platform build (macOS, Windows, Linux), code signing, auto-update, CI/CD