Cargo.lock

@@ -7826,6 +7826,7 @@ dependencies = [
  "rustls",
  "signed_core",
  "signed_nostr",
+ "utils",
 ]
 
 [[package]]
@@ -9091,6 +9092,13 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "utils"
+version = "1.0.0"
+dependencies = [
+ "nostr",
+]
+
 [[package]]
 name = "uuid"
 version = "1.24.0"
@@ -10348,6 +10356,7 @@ dependencies = [
  "gpui-component",
  "signed_core",
  "signed_state",
+ "utils",
 ]
 
 [[package]]

crates/signed_core/src/model.rs

@@ -21,6 +21,8 @@ pub struct Announcement {
     pub euc: Option<String>,
     /// Other recognized maintainers.
     pub maintainers: Vec<PublicKey>,
+    /// Hashtags labelling the repository (`t` tags).
+    pub hashtags: Vec<String>,
 }
 
 impl Announcement {
@@ -38,13 +40,20 @@ impl Announcement {
         let mut relays: Vec<String> = Vec::new();
         let mut euc: Option<String> = None;
         let mut maintainers: Vec<PublicKey> = Vec::new();
+        let mut hashtags: Vec<String> = Vec::new();
 
         for tag in event.tags.iter() {
-            // The `d` tag isn't part of the NIP-34 tag codec; parse it directly.
+            // The `d` and `t` tags aren't part of the NIP-34 tag codec; parse them directly.
             if tag.kind() == "d" {
                 id = tag.content().map(str::to_owned);
                 continue;
             }
+            if tag.kind() == "t" {
+                if let Some(value) = tag.content() {
+                    hashtags.push(value.to_owned());
+                }
+                continue;
+            }
 
             match Nip34Tag::parse(tag.as_slice()) {
                 Ok(Nip34Tag::Name(value)) => name = Some(value),
@@ -73,6 +82,7 @@ impl Announcement {
             relays,
             euc,
             maintainers,
+            hashtags,
         })
     }
 
@@ -119,6 +129,8 @@ mod tests {
             &["relays", "wss://relay.example.com"],
             &["r", "aa231c4c6a5777dc89b42207b499891a344add5c", "euc"],
             &["maintainers", MAINTAINER_HEX],
+            &["t", "rust"],
+            &["t", "nostr"],
         ]);
 
         let announcement = Announcement::from_event(&event).expect("parses");
@@ -141,6 +153,7 @@ mod tests {
             announcement.maintainers,
             vec![PublicKey::from_hex(MAINTAINER_HEX).expect("valid pubkey")]
         );
+        assert_eq!(announcement.hashtags, vec!["rust", "nostr"]);
     }
 
     #[test]

crates/signed_state/Cargo.toml

@@ -7,6 +7,7 @@ publish.workspace = true
 [dependencies]
 signed_core = { path = "../signed_core" }
 signed_nostr = { path = "../signed_nostr" }
+utils = { path = "../utils" }
 
 nostr.workspace = true
 nostr-sdk.workspace = true

crates/signed_state/src/lib.rs

@@ -7,7 +7,9 @@ use std::path::Path;
 
 pub use backend::{Backend, BackendEvent};
 use gpui::{App, AppContext, Entity};
-pub use profile::{Profile, ProfileStore, shorten_pubkey};
+pub use nostr_sdk::prelude::Timestamp;
+pub use profile::{Profile, ProfileStore};
+pub use utils::shorten_pubkey;
 pub use repo::RepoStore;
 pub use repo_list::RepoListStore;
 use signed_nostr::new_backend;

crates/signed_state/src/profile.rs

@@ -6,6 +6,7 @@ use anyhow::Error;
 use flume::{Receiver, RecvTimeoutError, Sender};
 use gpui::{App, AppContext, Context, Entity, Global, SharedString, Subscription, Task};
 use nostr_sdk::prelude::*;
+use utils::shorten_pubkey;
 
 use crate::backend::{Backend, BackendEvent, sync_bootstrap_only};
 
@@ -59,12 +60,6 @@ impl Profile {
     }
 }
 
-/// Shorten a [`PublicKey`] to `npub1abc...wxyz` form.
-pub fn shorten_pubkey(public_key: PublicKey, len: usize) -> String {
-    let npub = public_key.to_bech32().unwrap();
-    format!("{}...{}", &npub[..(len + 5)], &npub[npub.len() - len..])
-}
-
 /// Message from the fetch task to the main thread.
 enum Dispatch {
     /// A batched sync finished; re-read seen profiles from the database.

crates/signed_state/src/repo_list.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 use anyhow::Error;
 use gpui::{AppContext, Context, Subscription, Task};
 use nostr_sdk::prelude::*;
-use signed_core::{Announcement, RepoAddr, filters};
+use signed_core::{Announcement, RepoAddr, filters, repo_addr};
 
 use crate::backend::{Backend, BackendEvent};
 
@@ -13,10 +13,16 @@ use crate::backend::{Backend, BackendEvent};
 /// events (e.g. sync progress ticks) collapse into one query.
 const REFRESH_DEBOUNCE: Duration = Duration::from_millis(300);
 
+/// How far back activity events count toward a repository's last activity.
+const ACTIVITY_WINDOW: Duration = Duration::from_secs(90 * 86_400);
+
 /// Store listing repository announcements (global discovery or per-author).
 pub struct RepoListStore {
     /// Shared so views can clone the list per frame without a deep copy.
     pub announcements: Arc<Vec<Announcement>>,
+    /// Latest known activity timestamp per repository
+    /// (announcements, state updates, patches, PRs, issues, statuses).
+    pub last_activity: Arc<HashMap<RepoAddr, Timestamp>>,
     author: Option<PublicKey>,
     refreshing: bool,
     refresh_dirty: bool,
@@ -32,14 +38,22 @@ impl RepoListStore {
         let backend = Backend::global(cx);
 
         let subscription = cx.subscribe(&backend, |this, _backend, event, cx| {
-            let git_kind = Kind::GitRepoAnnouncement;
-
             let relevant = match event {
                 BackendEvent::NostrUpdate(update) => {
-                    update.kind == git_kind && this.author.is_none_or(|a| a == update.author)
+                    // Activity (patches, issues, ...) is addressed to repos via
+                    // `a` tags, so its author isn't the repo owner; always refresh.
+                    if filters::ACTIVITY_KINDS.contains(&update.kind) {
+                        true
+                    } else {
+                        let is_announcement = update.kind == Kind::GitRepoAnnouncement;
+                        let is_repo_state = update.kind == Kind::RepoState;
+                        let tracked = is_announcement || is_repo_state;
+                        tracked && this.author.is_none_or(|a| a == update.author)
+                    }
                 }
                 BackendEvent::Published(event) => {
-                    event.kind == git_kind && this.author.is_none_or(|a| a == event.pubkey)
+                    event.kind == Kind::GitRepoAnnouncement
+                        && this.author.is_none_or(|a| a == event.pubkey)
                 }
                 BackendEvent::Synced | BackendEvent::SyncProgress { .. } => true,
                 _ => false,
@@ -52,6 +66,7 @@ impl RepoListStore {
 
         let mut store = Self {
             announcements: Arc::new(Vec::new()),
+            last_activity: Arc::new(HashMap::new()),
             author,
             refreshing: false,
             refresh_dirty: false,
@@ -151,12 +166,59 @@ impl RepoListStore {
             let mut announcements: Vec<Announcement> = by_repo.into_values().collect();
             announcements.sort_by_key(|a| std::cmp::Reverse(a.created_at));
 
-            Ok::<_, Error>(announcements)
+            // Last activity per repository: state updates plus all NIP-34
+            // activity events (patches, PRs, issues, statuses).
+            let mut last_activity: HashMap<RepoAddr, Timestamp> = announcements
+                .iter()
+                .map(|a| (a.addr(), a.created_at))
+                .collect();
+
+            let state_filter = Filter::new().kind(Kind::RepoState);
+            for event in client.database().query(state_filter).await? {
+                let Some(id) = event.tags.identifier() else {
+                    continue;
+                };
+                let addr = repo_addr(event.pubkey, id);
+                let Some(entry) = last_activity.get_mut(&addr) else {
+                    continue;
+                };
+                *entry = (*entry).max(event.created_at);
+            }
+
+            // Bound the activity query to a recent window; older repos fall
+            // back to their announcement / state timestamps.
+            let activity_filter = Filter::new()
+                .kinds(filters::ACTIVITY_KINDS)
+                .since(Timestamp::now() - ACTIVITY_WINDOW);
+            for event in client.database().query(activity_filter).await? {
+                for tag in event.tags.iter() {
+                    if tag.kind() != "a" {
+                        continue;
+                    }
+                    let Some(content) = tag.content() else {
+                        continue;
+                    };
+                    let Ok(addr) = Coordinate::parse(content) else {
+                        continue;
+                    };
+                    if addr.kind != Kind::GitRepoAnnouncement {
+                        continue;
+                    }
+                    // Skip events for repos we don't list, so the map can't
+                    // grow beyond the number of announcements.
+                    let Some(entry) = last_activity.get_mut(&addr) else {
+                        continue;
+                    };
+                    *entry = (*entry).max(event.created_at);
+                }
+            }
+
+            Ok::<_, Error>((announcements, last_activity))
         });
 
         self.tasks.push(cx.spawn(async move |this, cx| {
-            let announcements = match work.await {
-                Ok(announcements) => announcements,
+            let (announcements, last_activity) = match work.await {
+                Ok(results) => results,
                 // Database errors are transient; keep the last list.
                 Err(_) => {
                     return this.update(cx, |this, _cx| {
@@ -167,6 +229,7 @@ impl RepoListStore {
 
             let again = this.update(cx, |this, cx| {
                 this.announcements = Arc::new(announcements);
+                this.last_activity = Arc::new(last_activity);
                 cx.notify();
 
                 this.refreshing = false;

crates/utils/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "utils"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+nostr.workspace = true

crates/utils/src/lib.rs

@@ -0,0 +1,5 @@
+mod pubkey;
+mod time;
+
+pub use pubkey::shorten_pubkey;
+pub use time::relative_time;

crates/utils/src/pubkey.rs

@@ -0,0 +1,7 @@
+use nostr::prelude::*;
+
+/// Shorten a [`PublicKey`] to `npub1abc...wxyz` form.
+pub fn shorten_pubkey(public_key: PublicKey, len: usize) -> String {
+    let npub = public_key.to_bech32().unwrap();
+    format!("{}...{}", &npub[..(len + 5)], &npub[npub.len() - len..])
+}

crates/utils/src/time.rs

@@ -0,0 +1,43 @@
+use nostr::prelude::*;
+
+/// Format a timestamp as a short relative time (e.g. "3h ago").
+pub fn relative_time(timestamp: Timestamp) -> String {
+    let now = Timestamp::now().as_secs();
+    let secs = now.saturating_sub(timestamp.as_secs());
+
+    if secs < 60 {
+        "just now".to_string()
+    } else if secs < 3600 {
+        format!("{}m ago", secs / 60)
+    } else if secs < 86_400 {
+        format!("{}h ago", secs / 3600)
+    } else if secs < 30 * 86_400 {
+        format!("{}d ago", secs / 86_400)
+    } else if secs < 365 * 86_400 {
+        format!("{}mo ago", secs / (30 * 86_400))
+    } else {
+        format!("{}y ago", secs / (365 * 86_400))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn formats_relative_time() {
+        let now = Timestamp::now();
+
+        assert_eq!(relative_time(now), "just now");
+        assert_eq!(relative_time(now - 300), "5m ago");
+        assert_eq!(relative_time(now - 7_200), "2h ago");
+        assert_eq!(relative_time(now - 3 * 86_400), "3d ago");
+        assert_eq!(relative_time(now - 60 * 86_400), "2mo ago");
+        assert_eq!(relative_time(now - 800 * 86_400), "2y ago");
+    }
+
+    #[test]
+    fn clamps_future_timestamps() {
+        assert_eq!(relative_time(Timestamp::now() + 600), "just now");
+    }
+}

crates/workspace/Cargo.toml

@@ -8,6 +8,7 @@ publish.workspace = true
 assets = { path = "../assets" }
 signed_core = { path = "../signed_core" }
 signed_state = { path = "../signed_state" }
+utils = { path = "../utils" }
 
 gpui.workspace = true
 gpui-component.workspace = true

crates/workspace/src/views/repo_list.rs

@@ -6,7 +6,8 @@ use gpui::{
 use gpui_component::dock::{Panel, PanelEvent};
 use gpui_component::{ActiveTheme, StyledExt};
 use signed_core::Announcement;
-use signed_state::{ProfileStore, RepoListStore};
+use signed_state::{ProfileStore, RepoListStore, Timestamp};
+use utils::relative_time;
 
 /// Browse all announced repositories (works anonymously).
 pub struct RepoListView {
@@ -27,7 +28,12 @@ impl RepoListView {
         }
     }
 
-    fn render_card(&self, announcement: &Announcement, cx: &mut App) -> AnyElement {
+    fn render_card(
+        &self,
+        announcement: &Announcement,
+        last_activity: Option<Timestamp>,
+        cx: &mut App,
+    ) -> AnyElement {
         let name = announcement
             .name
             .clone()
@@ -40,9 +46,41 @@ impl RepoListView {
 
         let description = announcement.description.clone().unwrap_or_default();
 
+        let mut hashtags: Vec<AnyElement> = announcement
+            .hashtags
+            .iter()
+            .take(3)
+            .map(|tag| {
+                div()
+                    .text_xs()
+                    .text_color(cx.theme().muted_foreground)
+                    .whitespace_nowrap()
+                    .child(SharedString::from(format!("#{tag}")))
+                    .into_any_element()
+            })
+            .collect();
+
+        let remaining = announcement.hashtags.len().saturating_sub(3);
+
+        if remaining > 0 {
+            hashtags.push(
+                div()
+                    .text_xs()
+                    .text_color(cx.theme().muted_foreground)
+                    .whitespace_nowrap()
+                    .child(SharedString::from(format!("+{remaining}")))
+                    .into_any_element(),
+            );
+        }
+
+        let activity = last_activity
+            .map(relative_time)
+            .map(|label| SharedString::from(format!("Updated {label}")))
+            .unwrap_or_default();
+
         div()
             .v_flex()
-            .h(px(60.))
+            .h(px(78.))
             .w_full()
             .justify_center()
             .gap_1()
@@ -78,6 +116,24 @@ impl RepoListView {
                     .text_ellipsis()
                     .child(description),
             )
+            .child(
+                div()
+                    .h_flex()
+                    .gap_2()
+                    .items_center()
+                    .overflow_hidden()
+                    .children(hashtags)
+                    .child(
+                        div()
+                            .flex_1()
+                            .h_flex()
+                            .justify_end()
+                            .text_xs()
+                            .text_color(cx.theme().muted_foreground)
+                            .whitespace_nowrap()
+                            .child(activity),
+                    ),
+            )
             .into_any_element()
     }
 }
@@ -103,6 +159,7 @@ impl Focusable for RepoListView {
 impl Render for RepoListView {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         let announcements = self.store.read(cx).announcements.clone();
+        let last_activity = self.store.read(cx).last_activity.clone();
         let has_announcements = !announcements.is_empty();
         let count = announcements.len();
 
@@ -147,7 +204,9 @@ impl Render for RepoListView {
                             let mut items = vec![];
 
                             for ix in range {
-                                items.push(this.render_card(&announcements[ix], cx));
+                                let announcement: &Announcement = &announcements[ix];
+                                let activity = last_activity.get(&announcement.addr()).copied();
+                                items.push(this.render_card(announcement, activity, cx));
                             }
 
                             items