signed/docs/inbox-plan.md

Inbox (home screen) implementation plan

Ported from GitWorkshop's home screen, the Dashboard rendered at route / for a logged-in user.

Correction to the first draft. The first draft assumed the inbox was the /notifications page. It is not. GitWorkshop's Index route (src/pages/Index.tsx) renders <Dashboard /> when an account is active, and that home screen is the inbox.

Status. Phases 0-4 are implemented and green on feat/inbox: cargo test -p signed_core (68), cargo test -p signed_state (24), cargo test -p workspace (7), cargo clippy -p workspace --all-targets clean, cargo check --workspace --all-targets succeeds. Phase 5 is not started. This document reflects the implementation as it stands, including the Phase 1 refactors, the §4.3 split of the inbox into a thin global Inbox and a panel-owned derivation, the Phase 3 bottom-dock sub-views, and the Phase 4 click-through.

1. What the GitWorkshop home screen is

Index.tsx:

if (account) return <Dashboard />;
return <LandingPage />;

Dashboard.tsx layout:

• Desktop: two columns.
  • Left column: GreetingHeader, NotificationsPanel, RecentActivitySection.
  • Right column: MyRepositoriesPanel, AccessiblePrivateRepositoriesPanel, FollowedReposPanel.
• Mobile: a single column in a different order.

The panel that gives the screen its inbox identity is NotificationsPanel:

• heading Notifications with a bell icon and an unread count badge,
• a Mark all read action and a View all link to /notifications,
• a compact list of the first 5 non-archived notification items,
• the empty state reads "Your inbox is empty" (with an Inbox icon).

So in GitWorkshop's vocabulary, "inbox" is the non-archived activity directed at you, surfaced inline on the home screen. The home screen also shows your own recent activity and your repositories.

Data hooks:

Section	Hook	What it loads
Notifications (inbox)	useNotifications()	Notification model: grouped thread activity directed at you, read/archived state
Continue where you left off	useUserActivity(pubkey)	Git activity authored by you: kinds 1621/1617/1618/1111 (git K)/1624/1630-1633, newest first, limit 50
My repositories	useUserRepositories(pubkey)	Kind 30617 announcements authored by you
Followed repositories	useUserFollowedRepos(pubkey)	Repos you follow
Accessible private repositories	useAccessiblePrivateRepositories()	Private repos from CI/services

2. Scope for Signed

Priority	Section	Notes
P0	Inbox panel	Activity directed at you, grouped by thread root; unread badge; mark all read; all groups shown
P0	Continue where you left off	Your own recent git activity, newest first
P1	Unread / Archived sub-views	Open as bottom-dock panels, not tabs inside the inbox panel
P1	Click-through	Open the repo panel at the relevant PR/issue
P2 (defer)	Standalone notifications page, NIP-65 relay discovery, pagination	Web-app concerns
Out of scope	Greeting header, my repositories, followed repositories, private repositories, pinned repositories	Not needed in Signed

Notes:

• There is no greeting header. The screen starts with the inbox panel.
• There is no My repositories column. The sidebar already lists the signed-in user's repositories, so the inbox is a single column.
• Unread and Archived are separate panels opened in the bottom dock, not tabs in the inbox panel.

3. The Signed screen

InboxView is a center panel, opened by the sidebar's existing Inbox nav item (currently a placeholder that opens Explore). It is two flexible bordered cards, each a virtual list:

+-------------------------------------------------------------------------+
| Inbox   (3 unread)          [Unread] [Archived] [Mark all read]         |
|  [avatar] issue opened on you/repo   2m                        (scroll) |
|  [avatar] commented on "Fix parser"  1h                                 |
|  [avatar] PR update on you/repo      3h                                 |
+-------------------------------------------------------------------------+
| Continue where you left off                                     (scroll)|
|  [icon] "Fix parser bug"   you/repo   opened 3d                         |
|  [icon] "Add retry"        you/repo   PR     5d                         |
+-------------------------------------------------------------------------+
|  bottom dock: Unread or Archived list (opened by the header buttons)    |
+-------------------------------------------------------------------------+

4. Data layer

4.1 signed_core: pure logic

filters.rs (extend, next to activity/comments_for):

/// Kinds that notify a user when they tag them directly.
pub const NOTIFICATION_KINDS: [Kind; 9] = [
    Kind::GitIssue,
    Kind::GitPullRequest,
    Kind::GitPatch,
    Kind::GitPullRequestUpdate,
    COVER_NOTE_KIND,
    Kind::GitStatusOpen,
    Kind::GitStatusApplied,
    Kind::GitStatusClosed,
    Kind::GitStatusDraft,
];

/// Comments on our issues/PRs/patches.
pub fn notification_comments(me: PublicKey) -> Filter {
    Filter::new()
        .kind(Kind::Comment)
        .custom_tags(SingleLetterTag::UPPERCASE_P, [me.to_hex()])
        .custom_tags(SingleLetterTag::UPPERCASE_K, ["1621", "1617", "1618"])
}

/// Activity directed at us: comments on our roots, and git events tagging us.
pub fn notifications(me: PublicKey) -> Vec<Filter> {
    vec![
        notification_comments(me),
        Filter::new().kinds(NOTIFICATION_KINDS).pubkey(me),
    ]
}

/// Git activity authored by `me`, for "Continue where you left off".
pub fn authored_activity(me: PublicKey) -> Filter {
    Filter::new()
        .kinds([ACTIVITY_KINDS.as_slice(), &[COVER_NOTE_KIND]].concat())
        .author(me)
}

ACTIVITY_KINDS already exists in this file. All builders use existing SDK APIs (Filter::kind/kinds/pubkey/custom_tags, SingleLetterTag::{UPPERCASE_P, UPPERCASE_K}).

Comments authored by me are not all git comments, so the activity query needs a post-filter: keep kind 1111 only when its uppercase K tag is a git root kind (1621/1617/1618/30617), matching gitworkshop's isGitComment.

inbox.rs (new file):

pub struct InboxItem {
    pub root: EventId,
    pub root_kind: Option<Kind>,
    pub address: Option<RepoAddr>,
    /// Events in the group, newest first.
    pub events: Vec<Event>,
    /// Unread event ids, oldest first.
    pub unread_ids: Vec<EventId>,
    pub archived: bool,
}

/// The thread root of a notification event, or `None` if it isn't git-related.
pub fn notification_root(
    event: &Event,
    lookup: &impl Fn(EventId) -> Option<Event>,
) -> Option<EventId>;

/// Group notification events by root, newest activity first, self excluded.
pub fn group(
    events: impl IntoIterator<Item = Event>,
    me: PublicKey,
    state: &InboxReadState,
    lookup: &impl Fn(EventId) -> Option<Event>,
) -> Vec<InboxItem>;

Root resolution, ported from getNotificationRootId:

• issue (1621) / PR (1618): itself
• patch (1617): its e parent patch, else itself
• NIP-22 comment (1111): uppercase E root pointer (SDK nip22::extract_root)
• PR update (1619): uppercase E
• statuses (1630-1633) / cover note (1624): NIP-10 root e
• self-authored events are excluded

Read/archive state, the compact high-water-mark model:

#[derive(Clone, Debug, Default, Serialize, Deserialize)]
pub struct InboxReadState {
    #[serde(default)] pub read_before: Timestamp,
    #[serde(default)] pub read_ids: HashSet<EventId>,
    #[serde(default)] pub archived_before: Timestamp,
    #[serde(default)] pub archived_ids: HashSet<EventId>,
}

impl InboxReadState {
    pub fn is_read(&self, event: &Event) -> bool;
    pub fn is_archived(&self, event: &Event) -> bool;
    pub fn mark_read(&mut self, event: &Event);
    pub fn mark_all_read(&mut self, all: &[Event], me: PublicKey);
    /// Move the cutoff to `min(oldest unread - 1, now - 3 days)` and prune ids.
    pub fn advance_read(&mut self, all: &[Event], me: PublicKey);
    pub fn advance_archived(&mut self, all: &[Event], me: PublicKey);
}

activity_subject in model.rs already gives an issue/PR title from the subject tag or first line; reuse it for the home screen rows.

4.2 Persistence: NIP-78 in the local database, never published

Read state is a normal NIP-78 (kind 30078, Kind::ApplicationSpecificData) addressable event written to LMDB only. It is never broadcast to a relay, so the read state stays on this device.

It is signed with a random keypair, never the user's signer. The event is local application storage, so its author carries no identity; this avoids a signing round-trip and does not depend on the signer type. The d tag identifies the owning user, so state does not leak across identities when the signed-in key changes.

/// d tag identifying the inbox read/archive state event of `me`.
fn inbox_state_d_tag(me: PublicKey) -> String {
    format!("signed-inbox-state:{}", me.to_hex())
}

/// Newest stored read state for `me`.
async fn load_state(client: &Client, me: PublicKey) -> Result<Option<InboxReadState>, Error> {
    // No author filter: the signing key is random per save.
    let filter = Filter::new()
        .kind(Kind::ApplicationSpecificData)
        .identifier(inbox_state_d_tag(me));

    let events = client.database().query(filter).await?;

    let Some(event) = events.into_iter().max_by_key(|event| event.created_at) else {
        return Ok(None);
    };

    match serde_json::from_str(&event.content) {
        Ok(state) => Ok(Some(state)),
        Err(error) => {
            log::warn!("ignoring unreadable inbox state {}: {error}", event.id);
            Ok(None)
        }
    }
}

/// Sign with a fresh random key and store locally.
async fn save_state(client: &Client, me: PublicKey, state: &InboxReadState) -> Result<(), Error> {
    let event = EventBuilder::new(Kind::ApplicationSpecificData, serde_json::to_string(state)?)
        .tags([Tag::identifier(inbox_state_d_tag(me))])
        .finalize(&Keys::generate())?; // synchronous: random key, no user signer
    // Local-only: no `send_event`, no broadcast. The event lives in LMDB.
    client.database().save_event(&event).await?;
    Ok(())
}

A fresh random key is generated on every save, so each save writes a new event rather than replacing the previous one. LMDB only auto-replaces an addressable event when the incoming event has the same pubkey, so old copies accumulate. Nothing prunes them; load_state reads the newest by created_at, so the behavior is correct. This is a deliberate trade for not caching a key in the store (see §4.3). An earlier implementation deleted the previous event by tracking its id across saves; that was removed as more derived state than it was worth. NostrDatabase::{save_event, query} and Client::database() are existing SDK APIs.

4.3 Data layer: a thin global Inbox, a panel-owned derivation

The inbox is split in two, because the expensive derivation is only needed while the home screen is open.

Inbox is a child Entity<Inbox> owned by Backend (inbox: Entity<Inbox>) and is deliberately thin: it owns only the read/archive state that must outlive the panel, the NIP-78 load/save, and the unread count the sidebar badge reads.

// backend.rs
pub struct Backend {
    ...
    inbox: Entity<Inbox>,
}

// inbox.rs
#[derive(Default)]
pub struct Inbox {
    state: InboxReadState,
    state_loaded: bool,
    /// Published by the inbox panel for the sidebar badge.
    pub unread_count: usize,
}

impl Inbox {
    pub fn state(&self) -> &InboxReadState;
    pub fn is_loaded(&self) -> bool;
    pub fn set_unread_count(&mut self, count: usize, cx: &mut Context<Self>);
    pub fn mark_read(&mut self, group: &[Event], all: &[Event], me: PublicKey, cx);
    pub fn mark_archived(&mut self, group: &[Event], all: &[Event], me: PublicKey, cx);
    pub fn mark_all_read(&mut self, all: &[Event], me: PublicKey, cx);
    pub(crate) fn activate(&mut self, me: PublicKey, client: Client, cx);
    pub(crate) fn reset(&mut self, cx);
}

The panel owns the derivation. InboxView itself holds the derived lists, the copy of the read state they were computed with, and the refresh coalescing. There is no separate store entity: the panel is the only consumer, so an Entity<InboxStore> would add an update indirection and a forwarding subscription without buying any sharing.

pub struct InboxView {
    focus_handle: FocusHandle,
    notifications: Arc<Vec<InboxItem>>,
    activity: Arc<Vec<Event>>,
    unread_count: usize,
    state: InboxReadState,
    state_loaded: bool,
    refresh: RefreshGate,
    _subscriptions: Vec<Subscription>,
}

impl InboxView {
    pub fn new(cx: &mut Context<Self>) -> Self;          // cx.defer(… sync_state)
    pub fn sync_state(&mut self, cx);                     // observes the global Inbox
    pub fn mark_read(&mut self, root: EventId, cx);       // Phase 3
    pub fn mark_archived(&mut self, root: EventId, cx);   // Phase 3
    pub fn mark_all_read(&mut self, cx);
    fn handle_backend_event(&mut self, event: &BackendEvent, cx);
    fn refresh(&mut self, cx);
    fn run_refresh(&mut self, cx);
}

The panel owns the two subscriptions that carry logic: it observes the global Inbox (InboxView::sync_state) and subscribes to Backend (InboxView::handle_backend_event). Re-rendering needs no subscription: GPUI invalidates a window for every entity it read during render, so the panel tracks RepoListStore and ProfileStore just by reading them in render. The panel writes back to Backend only to publish the unread count for the badge.

signed_state::query_inbox. The database work stays in signed_state, so the UI crate never queries LMDB directly. query_inbox returns the grouped notifications, the user's own git activity and the unread count; the panel applies the results on the main thread. RefreshGate is re-exported for the panel's debounce.

pub async fn query_inbox(
    client: &Client,
    me: PublicKey,
    state: &InboxReadState,
) -> Result<(Vec<InboxItem>, Vec<Event>, usize), Error>;

Lifespan. Inbox is created with the backend but idles until the user has a signer. The derived lists live only as long as the panel. Nothing is wired from the desktop crate and signed_state::init gains no parameters.

Badge trade-off. The unread count is derived by the panel, so the sidebar badge is only current after the inbox has been opened once in the session. Keeping it always live would require the expensive derivation to run globally, which is exactly what this split avoids.

The dependency chain is Backend → Inbox and InboxView → query_inbox; the panel reaches back only to publish the unread count.

Backend does not funnel its events through the inbox: the panel subscribes to Backend directly. BackendEvent::SignerChanged and SignerRequired are still emitted and must stay: CheckoutsStore and SidebarPanel consume them. They no longer drive the inbox.

InboxView::handle_backend_event refreshes on:

• NostrUpdate(updates): when any update kind is in NOTIFICATION_KINDS, is Kind::Comment, or is a deletion (EventDeletion / RequestToVanish).
• Synced / Published.
• everything else: ignored.

Signer lifecycle: Backend::sync_inbox. Backend owns the wiring and calls sync_inbox from the three real signer transitions: create_identity, set_signer (nsec, bunker and passphrase restore) and logout. It starts the subscriptions and repo-relay connects, then calls Inbox::activate or Inbox::reset. The client is passed into activate, so the global inbox never reads Backend while sync_inbox is mid-update:

fn sync_inbox(&mut self, cx: &mut Context<Self>) {
    let me = self.current_user;

    if let Some(me) = me {
        self.subscribe_bootstrap(filters::notifications(me), cx);
        self.subscribe_bootstrap(vec![filters::authored_activity(me)], cx);

        let relays: HashSet<RelayUrl> = RepoListStore::global(cx)
            .read(cx)
            .announcements_of(&me)
            .into_iter()
            .flat_map(|announcement| announcement.relays)
            .collect();

        if !relays.is_empty() {
            let relays: Vec<RelayUrl> = relays.into_iter().collect();
            self.connect_repo_relays(relays.clone(), filters::notifications(me), cx);
            self.connect_repo_relays(relays, vec![filters::authored_activity(me)], cx);
        }
    }

    let client = self.client.clone();
    self.inbox.update(cx, |inbox, cx| match me {
        Some(me) => inbox.activate(me, client, cx),
        None => inbox.reset(cx),
    });
}

The repo relays are read from RepoListStore::global(cx).read(cx).announcements_of(&me) at call time and never cached. (NIP-65 outbox relay discovery is deferred; Signed does not fetch kind 10002 yet.) Inbox::activate and Inbox::reset are pub(crate); Inbox has no subscribe_remote / connect_own_repo_relays.

Activation clears the state and loads the NIP-78 state from LMDB. The panel clears its own lists and in-flight refresh when it sees the unloaded state, then refreshes once it is loaded:

pub(crate) fn activate(&mut self, me: PublicKey, client: Client, cx: &mut Context<Self>) {
    // state = default; state_loaded = false; unread_count = 0; cx.notify();
    // spawn load_state(client, me), then set state and state_loaded = true
}

reset performs the same clearing without a state load, and is used on logout.

Reading the state event needs no signer at all (the d tag carries the identity); activation is still gated on the signer because the fetch filters need the user's pubkey.

Fetch reuses Backend::subscribe_bootstrap and Backend::connect_repo_relays through Backend::sync_inbox (see above). The query the panel runs is intentionally the offline-first cache read, not a wait on the network; see the note below.

Refresh (InboxView::run_refresh, mirrors RepoListStore::run_refresh):

• cx.background_spawn: query the notification filters and the activity filter from client.database().
• Query filters::deletions(), build Deletions, skip deleted events.
• Build HashMap<EventId, Event> for root walking; group the notification events with inbox::group.
• Filter the activity events: keep issues/PRs/patches/statuses/cover notes, and comments only when their K tag is a git kind; sort newest first.
• Cross back to the main thread: guard on Backend::global(cx).read(cx).current_user() == Some(me); if the signer changed while the query ran, refresh.abort() instead of applying, so a previous user's results never land. Then set notifications, activity, unread_count, publish the unread count to the global Inbox, cx.notify(), refresh.finish().

InboxView::sync_state reacts to the global Inbox: while the state is not loaded it clears the lists, on the first load it runs the initial refresh, and on a state change (a mark action) it re-derives the flags (InboxItem::apply_state) and publishes the new unread count.

Fetch vs. the immediate query. subscribe_bootstrap / connect_repo_relays return immediately, so the query that follows them reads the local cache rather than waiting for the relays. That is deliberate offline-first behavior: cached content appears at once on a warm start and with no network, instead of blocking the home screen on the network. The gap is closed by the SDK, not by timing: received events are written to LMDB and surfaced as ClientNotification::Event, so Backend's pump batches them into BackendEvent::NostrUpdate and the store refreshes. This was reviewed and left as-is.

Actions: mark_read(root), mark_archived(root), mark_all_read() live on the panel, which passes the group and every known notification event to the global Inbox. The global marks the group, advances the cutoffs against all notification events to bound the id sets, saves the state to LMDB (signed with a fresh random key, see 4.2), and notifies. The panel then re-derives and publishes the unread count.

Repository names need no new store: RepoListStore already holds every announcement and repo_name resolves an address to a display name.

4.4 Cargo.toml

• signed_core: add serde.workspace for the InboxReadState derives.
• signed_state: add serde_json.workspace for the NIP-78 content.

5. UI

5.1 InboxView center panel

New crates/workspace/src/views/inbox.rs, a BasePanel + Panel + Render, like RepoListView. It owns the derived lists directly, so cx.notify() from an update re-renders it. The panel is a column of two flexible bordered cards (flex_1, min_h_0), each with a header bar and a scrolling body. Each body is a gpui::list virtual list (ListState + ListAlignment::Top, 400px overdraw) with a vertical_scrollbar; the panel itself does not scroll, so both lists get a definite viewport height. The list counts are reset from render whenever the rendered item count changes. Row ids are prefixed (("inbox-row", ix) / ("activity-row", ix)) so the two lists do not collide.

• Inbox card: header with the unread count badge, the Unread and Archived sub-view buttons (Phase 3) and Mark all read; then every non-archived notification item. Rows show the actor avatar, a kind icon, the subject, the kind label, the repo name, a relative time, and an unread dot (the subject is semibold while unread). Empty state: "You're all caught up." with IconName::Inbox.
• Continue where you left off: every event in the activity list, each row a kind icon, subject, kind label, repo name, and relative time.

No greeting header, and no My repositories column - the sidebar already lists the user's repositories. The Unread and Archived header buttons open the sub-views of 5.2 in the bottom dock.

5.2 Unread / Archived as bottom-dock panels

Add a bottom-panel helper next to add_center_panel in crates/dock/src/lib.rs:

/// Add an already-wrapped panel handle to the bottom dock of `area`.
pub fn add_bottom_panel(
    area: &mut DockArea,
    panel: Arc<dyn PanelView>,
    window: &mut Window,
    cx: &mut Context<DockArea>,
) {
    area.add_panel_view(panel, DockPlacement::Bottom, None, window, cx);
}

The workspace already supports a bottom dock and prunes it when empty (workspace.rs). Then:

• InboxFilterView is a bottom-dock panel holding an Entity<InboxView> and a mode InboxFilter::Unread | InboxFilter::Archived. It renders the matching subset of the panel's notifications as a gpui::list, with the same rows as the inbox card. The mode filters on InboxItem::is_unread() / InboxItem::archived and picks the tab title and empty state. It reads the inbox entity during render, so GPUI's render-time tracking re-renders it whenever the inbox re-derives; it needs no subscription of its own.
• The Unread and Archived header buttons in InboxView call InboxView::open_filter, which keeps filter_view: Option<WeakEntity<InboxFilterView>>. When the panel already exists it updates its mode, focuses it, and reopens the bottom dock if the user collapsed it, instead of adding a duplicate. Otherwise it creates the panel and adds it to the bottom dock.
• Unread rows: clicking a row marks that group read (InboxView::mark_read); a trailing ghost icon button archives it (InboxView::mark_archived). Both call back into the InboxView entity, which updates the global Inbox. Archived rows are display-only, since the read state has no un-archive operation.

5.3 Sidebar

In views/sidebar/mod.rs:

• Add inbox: Option<WeakEntity<InboxView>> (mirrors explore) and unread: usize.

• Add fn open_inbox(&mut self, window, cx) that returns when the panel is already open, else adds a center panel (same shape as open_explore; there is no dock API to focus an existing tab). InboxView::new takes the sidebar's WeakEntity<DockArea> so the panel can open its sub-view.

• Point the existing nav item at it and add an unread suffix:

  NavItem::new("inbox", "Inbox", Icon::new(IconName::Inbox).small())
      .when(unread > 0, |this| this.suffix(...badge...))
      .on_click(cx.listener(|this, _ev, window, cx| this.open_inbox(window, cx))),
  

• cx.observe Backend::global(cx).read(cx).inbox() so the badge follows the count the panel publishes.

5.4 Click-through (P1)

Reuse the single RepoStore that RepoDetailView already creates instead of making a second one. The detail panels need a Window, and GPUI's Entity::update_in only exists on a VisualContext, which a synchronous App + Window pair is not - so the entry point is a free function rather than a RepoDetailView::open_item method. In repo_detail/mod.rs:

pub(crate) enum RepoItem {
    Issue(EventId),
    PullRequest(EventId),
    Patch,
}

pub(crate) fn open_repo_item(
    dock_area: &WeakEntity<DockArea>,
    store: Entity<RepoStore>,
    item: RepoItem,
    window: &mut Window,
    cx: &mut App,
) { /* new IssueDetailView / PullRequestDetailView, added to the center */ }

• RepoDetailView::store() exposes its Option<Entity<RepoStore>>, so the caller reuses the repo panel's store rather than building one. views/mod.rs re-exports RepoItem and open_repo_item.
• InboxView resolves item.address to an Announcement from RepoListStore, calls open_repo_panel (which returns Entity<RepoDetailView>), takes its store, and calls open_repo_item with the root id and kind. The detail panel renders a "not found" placeholder until the store's fetch lands, then re-renders.
• The repository panel and the detail panel are two tabs of the center group; the detail is activated. This matches the sidebar, which also opens a fresh repo panel per click.

Patches have no detail view in Signed (they are only consumed inside PullRequestDetailView), so a patch-root click opens the repo panel only. RepoItem::Patch carries no id for that reason. A group whose root is not an issue/PR/patch, or whose repository is not in RepoListStore, opens nothing.

6. File-by-file change list

File	Change
crates/signed_core/Cargo.toml	add serde
crates/signed_core/src/filters.rs	NOTIFICATION_KINDS, notification_comments, notifications, authored_activity, is_git_activity, deletions
crates/signed_core/src/inbox.rs	new: InboxItem, notification_root, group, InboxReadState, tests
crates/signed_core/src/lib.rs	mod inbox; and re-exports
crates/signed_state/Cargo.toml	add serde_json
crates/signed_state/src/inbox.rs	thin global Inbox (NIP-78 read state, mark actions) and query_inbox (query, grouping, activity)
crates/signed_state/src/backend.rs	inbox: Entity<Inbox> field, construction, inbox() accessor, sync_inbox, RepoListStore import
crates/signed_state/src/refresh.rs	doc comment lists Inbox among the RefreshGate users
crates/signed_state/src/lib.rs	mod inbox;, re-export Inbox and query_inbox; re-export RefreshGate (no global install)
crates/dock/src/lib.rs	add_bottom_panel helper
crates/workspace/src/views/inbox.rs	new: InboxView home panel owning the derived lists directly, the InboxFilterView bottom-dock sub-view for Unread / Archived, and the notification click-through
crates/workspace/src/views/mod.rs	mod inbox; pub use inbox::InboxView;; re-export RepoItem, open_repo_item, open_repo_panel
crates/workspace/src/views/sidebar/mod.rs	inbox/unread fields, open_inbox, nav wiring and badge
crates/workspace/src/views/repo_detail/mod.rs	RepoItem, open_repo_item, RepoDetailView::store()

No changes to desktop or signed_nostr. signed_state::init gains no parameters; Backend::sync_inbox activates the Inbox child entity at each signer transition.

7. Phasing

1. Phase 0 - pure logic: signed_core filters and inbox.rs plus tests. DONE. Implemented as filters::{NOTIFICATION_KINDS, notification_comments, notifications, authored_activity, is_git_activity} and inbox::{InboxItem, notification_root, group, InboxReadState}. Two deviations from the sketch: the cutoff methods take an explicit now: Timestamp so the pure logic stays deterministic and testable, and authored_activity results must pass through is_git_activity before display (comments on non-git roots are matched by the filter). cargo test -p signed_core passes (66 tests at the end of Phase 0; 68 after the two Phase 1 additions).
2. Phase 1 - store: Inbox child entity, activated by Backend::sync_inbox once a signer exists; both queries, unread count, and NIP-78 load/save to LMDB. DONE. See the implementation notes below.
3. Phase 2 - screen: InboxView (inbox + activity), sidebar nav and badge. DONE. See the implementation notes below.
4. Phase 3 - sub-views: add_bottom_panel and InboxFilterView for Unread / Archived. DONE. See the implementation notes below.
5. Phase 4 - click-through: open_item and announcement lookup. DONE. See the implementation notes below.
6. Phase 5 (optional): standalone notifications page, NIP-65 relays, pagination, patch detail view.

Each phase compiles and is usable on its own.

Phase 1 implementation notes

Files: crates/signed_state/{Cargo.toml, src/inbox.rs, src/lib.rs, src/backend.rs, src/refresh.rs} and two additions to crates/signed_core/src/inbox.rs.

• Inbox is a child entity of Backend (inbox: Entity<Inbox>), created in Backend::new and reached via Backend::inbox(). Nothing in desktop is wired and signed_state::init gains no parameters. The dependency is strictly one-way: Inbox holds no Backend handle.
• Backend::emit is the single funnel for every BackendEvent. It updates the inbox through cx.defer and then emits to the other subscribers. The defer is required: every emit site runs inside Backend::update, and the inbox handlers read Backend, so a synchronous call panics on a re-entrant entity access.
• The signer lifecycle lives in Backend::sync_inbox, called from create_identity, set_signer and logout. It starts the subscriptions and repo-relay connects, then defers inbox.activate / inbox.reset. SignerChanged / SignerRequired are still emitted for CheckoutsStore and SidebarPanel, but no longer drive the inbox.
• Inbox mirrors RepoListStore: RefreshGate coalescing, cx.background_spawn for the database work, plain data applied on the main thread, refresh-on-NostrUpdate/Synced/Published.
• Added state_loaded: bool, not in the sketch. Groups are derived from the read state, so a refresh before the stored state is read would briefly mark everything unread. The first refresh is chained after load_state, and later refresh calls are ignored until state_loaded is set.
• Account switches are guarded. activate and reset both replace self.refresh with a fresh RefreshGate, dropping any in-flight or pending run of the previous user, and the apply step of run_refresh aborts instead of applying when Backend::current_user() no longer matches the user the query was started for.
• Two additions to signed_core::inbox that Phase 1 needs: InboxReadState::mark_archived (mirrors mark_read) and InboxItem::apply_state (recomputes unread_ids/archived; group now uses it). Both are covered by tests.
• The thread-root lookup is built by walking every e/E ancestor transitively (fetch_notifications) rather than a single hop, because a patch series chains through parent patches. Only the notification events are grouped; ancestors are used solely as the lookup, so a root authored by someone else is not mistaken for a notification.
• The read/archive state event is written to LMDB only (database().save_event), signed with a fresh Keys::generate() on each save and never published. Filtering is by d tag only, no author, so the random key is irrelevant across sessions. d tag uses me.to_hex() rather than Display.
• Actions: mark_read(root), mark_archived(root), mark_all_read(). Each marks the group, advances the relevant cutoffs against all notification events (matching GitWorkshop's use of allEvents), re-derives the groups locally so the UI updates immediately, then persists in the background.
• The global Inbox keeps no derived state. The signing key is generated per save, the current user is read from Backend::current_user() where needed, and the relays of the user's own repositories are queried from RepoListStore in Backend::sync_inbox rather than cached. There is no prune logic either: the newest state event is selected by created_at.
• Inbox::activate / Inbox::reset are pub(crate); the former subscribe_remote and connect_own_repo_relays methods were deleted once their work moved into Backend::sync_inbox.
• cargo test -p signed_core passes (68 tests), cargo test -p signed_state passes (24 tests); cargo clippy -p signed_state --all-targets is clean; cargo check --workspace succeeds.

Phase 2 implementation notes

Files: crates/workspace/src/views/{inbox.rs, mod.rs, sidebar/mod.rs}. No store changes.

• InboxView is a plain center panel like RepoListView; the sidebar holds a WeakEntity<InboxView> so there is no cycle. Re-rendering relies on GPUI's render-time entity tracking rather than explicit observations. (Phase 2 introduced an Entity<InboxStore> here; it was later folded into the panel - see the store-merge note below.)
• The layout is a column of two flexible bordered cards (gap_4, p_4, each flex_1/min_h_0), inbox over activity. Each card is a rounded v_flex with a header bar (section) and a gpui::list body. There is no My repositories column: the sidebar already lists the user's repositories, so the panel is a single column.
• Notification rows read the newest event of each group for the actor, subject and time, and the root's kind for the icon. The repo name is resolved from item.address through a linear scan of RepoListStore::announcements (repo_name); the list is small and this keeps the store unchanged.
• The Unread / Archived header buttons are intentionally absent: they need add_bottom_panel / InboxFilterView, which are Phase 3. The header is only Mark all read, so the panel is fully usable on its own.
• kind_icon / kind_label map a Kind to a CustomIconName/IconName and a short noun. The cover note is compared with == rather than matched, since Kind cannot appear in a pattern arm.
• Sidebar: open_inbox mirrors open_explore (return if open, else add a center panel); the inbox nav item is repointed and carries a CountBadge suffix driven by the observed unread count. The screen is still opened by the nav item, not on app startup, matching the "idle until signer" rule; auto-opening it as the post-login home is a possible follow-up.
• The My repositories column (search InputState, New button, open_repo_panel rows) was removed after Phase 2 as redundant with the sidebar, along with the panel's dock_area, open_repo / open_create_repo helpers and the create_repo_dialog / open_repo_panel imports. InboxView::new now takes only cx. create_repo_dialog is private again.
• cargo clippy -p workspace --all-targets is clean and cargo check --workspace --all-targets succeeds. cargo test -p signed_core (68) and cargo test -p signed_state (24) still pass.

Architecture refactor (after Phase 2)

Phases 0-2 kept all derivation in the global Inbox, so every notification and activity query ran whether or not the home screen was open, and Backend::emit carried a deferred side effect just to feed it.

• The global Inbox is now thin: state: InboxReadState, state_loaded, and the unread_count the sidebar badge reads, plus the NIP-78 load/save and the mark actions.
• Backend::emit is gone. All BackendEvents are emitted with cx.emit again, and sync_inbox updates the inbox synchronously, passing the client in so nothing reads Backend mid-update.
• The panel became the client-side owner of the derivation, initially through a panel-scoped Entity<InboxStore>.
• signed_core is unchanged.

Store merged into the panel (after Phase 2)

The InboxStore entity was then folded into InboxView, since the panel was its only consumer.

• InboxView holds notifications, activity, unread_count, state, state_loaded and RefreshGate as fields, and the store's methods (sync_state, handle_backend_event, refresh/run_refresh, regroup, publish_unread_count, clear, the mark actions) became panel methods. The two subscriptions call them directly, with no update indirection.
• The database work stayed in signed_state as pub async fn query_inbox(...); RefreshGate and RefreshRequest are re-exported. The UI crate never queries LMDB directly.
• mark_read, mark_archived and their group_events helper carry a scoped #[allow(dead_code)] until the Phase 3 sub-views wire them up.
• cargo test -p signed_core (68), cargo test -p signed_state (24) and cargo test -p workspace (7) pass; clippy and cargo check --workspace --all-targets are clean.

Trade-off: the sidebar badge is only current after the inbox is opened once, because the unread count is derived by the panel.

Phase 3 implementation notes

Files: crates/dock/src/lib.rs and crates/workspace/src/views/{inbox.rs, sidebar/mod.rs}. No store changes.

• add_bottom_panel sits next to add_center_panel and wraps DockArea::add_panel_view(panel, DockPlacement::Bottom, None, ...). A new bottom dock starts open, and the workspace's existing DockEvent::LayoutChanged subscription removes an emptied bottom dock, so a closed sub-view leaves no strip behind.
• InboxFilterView is private to views/inbox.rs. It holds an Entity<InboxView> (strong; the panel keeps only the weak filter_view back, so there is no cycle), the mode, and its own ListState. There is no subscription: it reads the inbox entity during render, which is enough for GPUI to invalidate the window when the inbox notifies.
• InboxFilter is a private two-variant enum with label() and matches(&InboxItem). The tab title comes from Panel::title, so switching modes through set_mode retitles the same tab instead of opening a second one.
• InboxView regained a dock_area: WeakEntity<DockArea> (removed with the My-repositories column) and takes it in new. open_filter reuses the existing panel, focuses it, and reopens the bottom dock when it is collapsed; otherwise it creates and adds the panel. InboxView::new is now called as InboxView::new(self.dock_area.clone(), cx) from SidebarPanel::open_inbox.
• The three #[allow(dead_code)] markers on mark_read, mark_archived and group_events are gone: Unread rows call mark_read on click and mark_archived from a trailing ghost icon button (Button + IconName::FolderClosed, tooltip "Archive"). The button calls cx.stop_propagation() so it does not also trigger the row's mark-read click. Archived rows are display-only; the read state has no un-archive operation.
• notification_row takes an id prefix and returns Stateful<Div> rather than AnyElement, so callers can attach a click handler and a trailing action. The inbox list passes "inbox-row" and the sub-view "inbox-filter-row", because the two lists render in the same window and would otherwise collide on (str, ix) ids.
• cargo clippy -p workspace -p dock --all-targets is clean, cargo check --workspace --all-targets succeeds, and cargo test -p signed_core -p signed_state -p workspace passes (68 / 24 / 7).

Phase 4 implementation notes

Files: crates/workspace/src/views/{inbox.rs, mod.rs, repo_detail/mod.rs}. No store changes.

• RepoItem { Issue(EventId), PullRequest(EventId), Patch } and pub(crate) fn open_repo_item live in repo_detail/mod.rs, next to open_repo_panel. open_repo_item takes the store as a parameter, avoiding a second RepoStore.
• It is a free function, not RepoDetailView::open_item: the detail constructors take a Window, and a synchronous &mut App + &mut Window pair is not a VisualContext, so Entity::update_in is not available. InboxView already has the window in the list's on_click, so it drives the free function directly. The plan's original detail.update_in(window, cx, ...) sketch could not compile.
• RepoDetailView::store() (pub(crate)) exposes the panel's Option<Entity<RepoStore>>. The repo panel is opened first and its store reused, so the detail panel shares one store with the repo it came from.
• InboxView::open_item is also a free function (it needs nothing but dock_area, which it captures from the panel) because the gpui::list item closure only receives &mut App. It resolves item.address through RepoListStore, returns silently when the repository is unknown, opens the repo panel, then maps the root kind to a RepoItem and calls open_repo_item.
• Only the main notification list is clickable. Unread rows keep their Phase 3 behaviour (click marks read, trailing button archives). Activity rows are unchanged.
• RepoItem::Patch is a unit variant because the id would be unused: patches have no detail panel, so open_repo_item returns before doing anything and only the repository panel opens.
• cargo clippy -p workspace --all-targets is clean, cargo check --workspace --all-targets succeeds, and cargo test -p signed_core -p signed_state -p workspace -p dock passes (68 / 24 / 7 / 1).

8. Validation

• cargo test -p signed_core (68 tests): root resolution, grouping, read-state cutoff, serde round-trip.
• cargo test -p signed_state (24 tests): the Inbox / query_inbox paths that do not need GPUI (state round-trip, grouping helpers).
• cargo test -p workspace (7 tests): repository-detail helpers.
• cargo clippy -p signed_state --all-targets, cargo clippy -p workspace --all-targets and cargo check --workspace --all-targets after each phase.
• Manual: log in with a repo-owning identity; open the inbox from the sidebar and confirm the panel populates from another identity's issue/comment, the activity list shows your own items, and that no kind-30078 event is broadcast (watch the relays / Published events). Restart to confirm the read state is read back from LMDB.

9. SDK APIs used (verified in the pinned 5c669a4 checkout)

• Kind::{Comment, GitIssue, GitPullRequest, GitPatch, GitPullRequestUpdate, GitStatusOpen/Applied/Closed/Draft, ApplicationSpecificData, EventDeletion, RequestToVanish}
• Filter::{kind, kinds, pubkey, pubkeys, custom_tags, limit, since, events, coordinate, identifier}
  • Non-obvious: Filter::pubkey/pubkeys set the lowercase p tag, not authors. Use Filter::author/authors for authorship. The notifications filter relies on this.
• SingleLetterTag::{LOWERCASE_P, LOWERCASE_E, UPPERCASE_P, UPPERCASE_K, UPPERCASE_E}
• nostr::nips::nip22::{extract_root, extract_parent, CommentTarget}: NIP-22 root/parent pointers
• Tags::{event_ids, public_keys, coordinates, identifier, hashtags} iterators
• Client::{database, subscribe, sync, notifications, send_event, add_relay}; NostrDatabase::{save_event, query}; NostrLmdb, NostrGossipMemory
• EventBuilder::{new, tags, finalize}, Tag::identifier, Keys::generate
• Timestamp, EventId (hex serde), PublicKey, Coordinate
• Fetch paths converge on the same notification: client.subscribe(...) and negentropy client.sync(...) both persist received events to LMDB and surface them as ClientNotification::Event, which Backend's pump batches into BackendEvent::NostrUpdate. This is why the query right after a fetch is a cache read, not a race.