crates/signed_core/src/filters.rs

@@ -68,8 +68,10 @@ pub fn announcements_by(public_key: PublicKey) -> Filter {
 }
 
 /// All repository announcements (for global discovery).
-pub fn all_announcements(limit: usize) -> Filter {
-    Filter::new()
-        .kind(Kind::GitRepoAnnouncement)
-        .limit(limit)
+///
+/// Unbounded: intended for negentropy sync, which reconciles sets
+/// efficiently regardless of size. Local database queries with this
+/// filter are served by LMDB, so they stay fast as the database grows.
+pub fn all_announcements() -> Filter {
+    Filter::new().kind(Kind::GitRepoAnnouncement)
 }

crates/signed_state/src/backend.rs

@@ -45,6 +45,14 @@ pub enum BackendEvent {
     /// so stores should re-query (no [`BackendEvent::NostrUpdate`] is fired
     /// for synced events).
     Synced,
+    /// A negentropy sync is in flight. Stores may re-query to render
+    /// incrementally; UI can show `current`/`total` progress.
+    SyncProgress {
+        /// Total events to process.
+        total: u64,
+        /// Events processed so far.
+        current: u64,
+    },
     /// An event built locally was signed, broadcast and stored.
     Published(Box<Event>),
     /// An error occurred.
@@ -67,6 +75,7 @@ pub struct Backend {
     inner: NostrBackend,
     current_user: Option<PublicKey>,
     connected: bool,
+    sync_progress: Option<(u64, u64)>,
     tasks: Vec<Task<Result<(), Error>>>,
 }
 
@@ -114,6 +123,7 @@ impl Backend {
             inner,
             current_user: None,
             connected: false,
+            sync_progress: None,
             tasks: vec![pump],
         };
 
@@ -388,6 +398,11 @@ impl Backend {
         self.connected
     }
 
+    /// Progress of the in-flight negentropy sync, if any: `(total, current)`.
+    pub fn sync_progress(&self) -> Option<(u64, u64)> {
+        self.sync_progress
+    }
+
     /// Update the signer (any type implementing the async signer traits,
     /// e.g. `Keys`, `NostrConnect`, a browser extension proxy).
     pub fn set_signer<T>(&mut self, new_signer: T, cx: &mut Context<Self>)
@@ -506,12 +521,47 @@ impl Backend {
 
     /// Negentropy-sync the given filter against the bootstrap relays:
     /// reconciles the local database with the relays in both directions.
-    /// Emits [`BackendEvent::Synced`] on completion.
+    /// Emits [`BackendEvent::SyncProgress`] while running (throttled to
+    /// whole-percent changes) and [`BackendEvent::Synced`] on completion.
     pub fn sync_bootstrap(&mut self, filter: Filter, cx: &mut Context<Self>) {
         let backend = self.inner.clone();
 
+        self.sync_progress = Some((0, 0));
+        cx.notify();
+
+        let (tx, mut rx) = SyncProgress::channel();
+
+        self.tasks.push(cx.spawn(async move |this, cx| {
+            let mut last_percent: u64 = 0;
+
+            while rx.changed().await.is_ok() {
+                let progress = *rx.borrow_and_update();
+                let percent = (progress.percentage() * 100.0) as u64;
+
+                if progress.current > 0 && percent != last_percent {
+                    last_percent = percent;
+
+                    let alive = this.update(cx, |this, cx| {
+                        this.sync_progress = Some((progress.total, progress.current));
+                        cx.emit(BackendEvent::SyncProgress {
+                            total: progress.total,
+                            current: progress.current,
+                        });
+                        cx.notify();
+                    });
+
+                    if alive.is_err() {
+                        break;
+                    }
+                }
+            }
+
+            Ok(())
+        }));
+
         let task = cx.background_spawn(async move {
-            sync_bootstrap_only(&backend.client(), filter).await
+            let opts = SyncOptions::default().progress(tx);
+            sync_bootstrap_only(&backend.client(), filter, opts).await
         });
 
         self.tasks.push(cx.spawn(async move |this, cx| {
@@ -522,13 +572,17 @@ impl Backend {
                         summary.received.len(),
                         summary.sent.len()
                     );
-                    this.update(cx, |_this, cx| {
+                    this.update(cx, |this, cx| {
+                        this.sync_progress = None;
                         cx.emit(BackendEvent::Synced);
                         cx.notify();
                     })?;
                 }
                 Err(e) => {
-                    this.update(cx, |_this, cx| cx.emit(BackendEvent::error(e.to_string())))?;
+                    this.update(cx, |this, cx| {
+                        this.sync_progress = None;
+                        cx.emit(BackendEvent::error(e.to_string()))
+                    })?;
                 }
             }
             Ok(())
@@ -596,7 +650,8 @@ pub(crate) async fn subscribe_bootstrap_only(client: &Client, filters: Vec<Filte
 pub(crate) async fn sync_bootstrap_only(
     client: &Client,
     filter: Filter,
+    opts: SyncOptions,
 ) -> Result<SyncSummary, Error> {
-    let output = client.sync(filter).with(BOOTSTRAP_RELAYS).await?;
+    let output = client.sync(filter).with(BOOTSTRAP_RELAYS).opts(opts).await?;
     Ok(output.value)
 }

crates/signed_state/src/profile.rs

@@ -257,7 +257,7 @@ impl ProfileStore {
                 // Negentropy-sync with the bootstrap relays. Synced events
                 // are written to the database directly (no NostrUpdate), so
                 // re-apply from the database afterwards.
-                match sync_bootstrap_only(&client, filter).await {
+                match sync_bootstrap_only(&client, filter, SyncOptions::default()).await {
                     Ok(_) => {
                         this.update(cx, |this, cx| this.apply_seen(cx))?;
                     }

crates/signed_state/src/repo_list.rs

@@ -31,7 +31,7 @@ impl RepoListStore {
                     event.kind == Kind::GitRepoAnnouncement
                         && this.author.is_none_or(|a| a == event.pubkey)
                 }
-                BackendEvent::Synced => true,
+                BackendEvent::Synced | BackendEvent::SyncProgress { .. } => true,
                 _ => false,
             };
 
@@ -69,7 +69,7 @@ impl RepoListStore {
         backend.update(cx, |backend, cx| {
             let filter = match author {
                 Some(a) => filters::announcements_by(a),
-                None => filters::all_announcements(500),
+                None => filters::all_announcements(),
             };
             backend.sync_bootstrap(filter, cx);
         });
@@ -93,7 +93,7 @@ impl RepoListStore {
             loop {
                 let filter = match author {
                     Some(a) => filters::announcements_by(a),
-                    None => filters::all_announcements(500),
+                    None => filters::all_announcements(),
                 };
 
                 let events = match client.database().query(filter).await {

crates/workspace/src/workspace.rs

@@ -18,10 +18,15 @@ impl Workspace {
         let repo_list = cx.new(|cx| RepoListView::new(window, cx));
 
         let connected = backend.read(cx).is_connected();
+        let sync_progress = backend.read(cx).sync_progress();
 
         let subscription = cx.subscribe(&backend, |this, _backend, event, cx| {
             match event {
                 BackendEvent::Connected => this.status = "Connected".into(),
+                BackendEvent::SyncProgress { total, current } => {
+                    this.status = format!("Syncing repositories... {current}/{total}").into()
+                }
+                BackendEvent::Synced => this.status = "Connected".into(),
                 BackendEvent::Error(error) => this.status = error.clone().into(),
                 _ => return,
             }
@@ -30,7 +35,9 @@ impl Workspace {
 
         Self {
             active_screen: repo_list.into(),
-            status: if connected {
+            status: if let Some((total, current)) = sync_progress {
+                format!("Syncing repositories... {current}/{total}").into()
+            } else if connected {
                 "Connected".into()
             } else {
                 "Connecting...".into()