huskies: merge 641_story_unified_status_update_delivery_across_chat_web_ui_and_top_level_agent_context

server/src/service/bot_command/io.rs

@@ -146,6 +146,7 @@ pub(super) fn call_sync(
         perm_rx: Arc::new(tokio::sync::Mutex::new(perm_rx)),
         pending_perm_replies: Arc::new(tokio::sync::Mutex::new(HashMap::new())),
         permission_timeout_secs: 120,
+        status: Arc::new(crate::service::status::StatusBroadcaster::new()),
     });
 
     let dispatch = CommandDispatch {

server/src/service/gateway/io.rs

@@ -406,6 +406,7 @@ pub fn spawn_gateway_bot(
             std::collections::HashMap::new(),
         )),
         permission_timeout_secs: 120,
+        status: std::sync::Arc::new(crate::service::status::StatusBroadcaster::new()),
     });
 
     crate::chat::transport::matrix::spawn_bot(

server/src/service/mod.rs

@@ -23,6 +23,7 @@ pub mod project;
 pub mod qa;
 pub mod settings;
 pub mod shell;
+pub mod status;
 pub mod story;
 pub mod timer;
 pub mod wizard;

server/src/service/status/format.rs

@@ -0,0 +1,203 @@
+//! Pure status-event message formatter.
+//!
+//! A single [`format_status_event`] function converts any [`StatusEvent`] into
+//! a human-readable string.  Adding a new event type means adding one match arm
+//! here — no per-transport duplication anywhere in the codebase.
+
+use crate::service::common::item_id::extract_item_number;
+use crate::service::notifications::format::stage_display_name;
+use crate::service::status::StatusEvent;
+
+/// Render a [`StatusEvent`] into a human-readable plain-text string.
+#[allow(dead_code)]
+///
+/// This is the single formatter for all status event types.  Every transport
+/// (chat, Web UI, agent context) calls this function rather than duplicating
+/// formatting logic.
+pub fn format_status_event(event: &StatusEvent) -> String {
+    match event {
+        StatusEvent::StageTransition {
+            story_id,
+            story_name,
+            from_stage,
+            to_stage,
+        } => {
+            let number = extract_item_number(story_id).unwrap_or(story_id.as_str());
+            let name = story_name.as_deref().unwrap_or(story_id.as_str());
+            let from = stage_display_name(from_stage);
+            let to = stage_display_name(to_stage);
+            let prefix = if to == "Done" { "\u{1f389} " } else { "" };
+            format!("{prefix}#{number} {name} \u{2014} {from} \u{2192} {to}")
+        }
+        StatusEvent::MergeFailure {
+            story_id,
+            story_name,
+            reason,
+        } => {
+            let number = extract_item_number(story_id).unwrap_or(story_id.as_str());
+            let name = story_name.as_deref().unwrap_or(story_id.as_str());
+            format!("\u{274c} #{number} {name} \u{2014} {reason}")
+        }
+        StatusEvent::StoryBlocked {
+            story_id,
+            story_name,
+            reason,
+        } => {
+            let number = extract_item_number(story_id).unwrap_or(story_id.as_str());
+            let name = story_name.as_deref().unwrap_or(story_id.as_str());
+            format!("\u{1f6ab} #{number} {name} \u{2014} BLOCKED: {reason}")
+        }
+        StatusEvent::RateLimitWarning {
+            story_id,
+            story_name,
+            agent_name,
+        } => {
+            let number = extract_item_number(story_id).unwrap_or(story_id.as_str());
+            let name = story_name.as_deref().unwrap_or(story_id.as_str());
+            format!("\u{26a0}\u{fe0f} #{number} {name} \u{2014} {agent_name} hit an API rate limit")
+        }
+        StatusEvent::RateLimitHardBlock {
+            story_id,
+            story_name,
+            agent_name,
+            reset_at,
+        } => {
+            let number = extract_item_number(story_id).unwrap_or(story_id.as_str());
+            let name = story_name.as_deref().unwrap_or(story_id.as_str());
+            let reset = reset_at.format("%H:%M UTC").to_string();
+            format!(
+                "\u{26d4} #{number} {name} \u{2014} {agent_name} hard rate-limited until {reset}"
+            )
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use chrono::TimeZone;
+
+    #[test]
+    fn formats_stage_transition_to_done_with_emoji() {
+        let event = StatusEvent::StageTransition {
+            story_id: "42_story_foo".to_string(),
+            story_name: Some("Foo Story".to_string()),
+            from_stage: "4_merge".to_string(),
+            to_stage: "5_done".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(
+            s.contains("\u{1f389}"),
+            "done transition should include party emoji"
+        );
+        assert!(s.contains("#42"));
+        assert!(s.contains("Foo Story"));
+        assert!(s.contains("Merge \u{2192} Done"));
+    }
+
+    #[test]
+    fn formats_stage_transition_no_emoji_for_non_done() {
+        let event = StatusEvent::StageTransition {
+            story_id: "10_story_bar".to_string(),
+            story_name: Some("Bar".to_string()),
+            from_stage: "1_backlog".to_string(),
+            to_stage: "2_current".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(!s.contains("\u{1f389}"));
+        assert!(s.contains("Backlog \u{2192} Current"));
+    }
+
+    #[test]
+    fn formats_stage_transition_falls_back_to_story_id_when_no_name() {
+        let event = StatusEvent::StageTransition {
+            story_id: "5_story_x".to_string(),
+            story_name: None,
+            from_stage: "2_current".to_string(),
+            to_stage: "3_qa".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(s.contains("5_story_x"));
+    }
+
+    #[test]
+    fn formats_merge_failure() {
+        let event = StatusEvent::MergeFailure {
+            story_id: "7_story_fail".to_string(),
+            story_name: Some("Failing Story".to_string()),
+            reason: "conflicts detected".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(s.contains("\u{274c}"));
+        assert!(s.contains("#7"));
+        assert!(s.contains("conflicts detected"));
+    }
+
+    #[test]
+    fn formats_story_blocked() {
+        let event = StatusEvent::StoryBlocked {
+            story_id: "8_story_blk".to_string(),
+            story_name: Some("Blocked Story".to_string()),
+            reason: "retry limit exceeded".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(s.contains("\u{1f6ab}"));
+        assert!(s.contains("BLOCKED: retry limit exceeded"));
+    }
+
+    #[test]
+    fn formats_rate_limit_warning() {
+        let event = StatusEvent::RateLimitWarning {
+            story_id: "9_story_rl".to_string(),
+            story_name: Some("RL Story".to_string()),
+            agent_name: "coder-1".to_string(),
+        };
+        let s = format_status_event(&event);
+        assert!(s.contains("coder-1 hit an API rate limit"));
+    }
+
+    #[test]
+    fn formats_rate_limit_hard_block() {
+        let reset = chrono::Utc
+            .with_ymd_and_hms(2026, 4, 26, 15, 30, 0)
+            .unwrap();
+        let event = StatusEvent::RateLimitHardBlock {
+            story_id: "3_story_hb".to_string(),
+            story_name: Some("HB Story".to_string()),
+            agent_name: "coder-2".to_string(),
+            reset_at: reset,
+        };
+        let s = format_status_event(&event);
+        assert!(s.contains("\u{26d4}"));
+        assert!(s.contains("coder-2"));
+        assert!(s.contains("hard rate-limited"));
+        assert!(s.contains("15:30 UTC"));
+    }
+
+    #[test]
+    fn single_formatter_no_per_transport_duplication() {
+        // Each event type produces output through a single call — no per-transport variants.
+        let events: Vec<StatusEvent> = vec![
+            StatusEvent::StageTransition {
+                story_id: "1_story_a".to_string(),
+                story_name: None,
+                from_stage: "1_backlog".to_string(),
+                to_stage: "2_current".to_string(),
+            },
+            StatusEvent::MergeFailure {
+                story_id: "2_story_b".to_string(),
+                story_name: None,
+                reason: "test".to_string(),
+            },
+            StatusEvent::StoryBlocked {
+                story_id: "3_story_c".to_string(),
+                story_name: None,
+                reason: "limit".to_string(),
+            },
+        ];
+        for e in &events {
+            let s = format_status_event(e);
+            assert!(!s.is_empty());
+        }
+    }
+}

server/src/service/status/mod.rs

@@ -0,0 +1,449 @@
+//! Status broadcaster — unified pipeline-event fan-out for all consumers.
+//!
+//! [`StatusBroadcaster`] lives on the [`crate::services::Services`] bundle and
+//! exposes two entry points:
+//!
+//! - [`StatusBroadcaster::publish`] — emit an event to every active subscriber.
+//! - [`StatusBroadcaster::subscribe`] — obtain a [`Subscription`] handle that
+//!   receives events and can be independently enabled or disabled.
+//!
+//! # Multi-project isolation
+//!
+//! Each project has its own `Services` bundle and therefore its own
+//! `StatusBroadcaster` instance.  Events published to project A's broadcaster
+//! are delivered only to subscribers of that same broadcaster; project B's
+//! subscribers see nothing.
+//!
+//! # Plug-in consumer design
+//!
+//! Future stories add their transport-specific logic without touching this
+//! module:
+//!
+//! - Story 642 (top-level agent context): calls `subscribe()` once at startup.
+//! - Story 643 (Web UI): calls `subscribe()` once at startup.
+//! - Story 644 (chat transports): calls `subscribe()` once per transport.
+
+pub mod format;
+
+use chrono::{DateTime, Utc};
+use std::sync::{
+    Arc,
+    atomic::{AtomicBool, Ordering},
+};
+use tokio::sync::broadcast;
+
+/// The capacity of the underlying broadcast channel.
+///
+/// Lagging subscribers lose events — callers should consume promptly.
+const CHANNEL_CAPACITY: usize = 256;
+
+// ── StatusEvent ───────────────────────────────────────────────────────────────
+
+/// A pipeline lifecycle event that the [`StatusBroadcaster`] fans out to all
+/// configured consumers.
+///
+/// Each variant carries enough context for [`format_status_event`] to render a
+/// human-readable message without additional lookups.
+#[derive(Clone, Debug)]
+pub enum StatusEvent {
+    /// A work item moved between pipeline stages.
+    StageTransition {
+        /// Work item ID (e.g. `"42_story_my_feature"`).
+        story_id: String,
+        /// Human-readable story name, if available.
+        story_name: Option<String>,
+        /// Pipeline stage directory the item moved FROM (e.g. `"2_current"`).
+        from_stage: String,
+        /// Pipeline stage directory the item moved TO (e.g. `"3_qa"`).
+        to_stage: String,
+    },
+    /// A merge operation failed for a story.
+    MergeFailure {
+        /// Work item ID (e.g. `"42_story_my_feature"`).
+        story_id: String,
+        /// Human-readable story name, if available.
+        story_name: Option<String>,
+        /// Human-readable description of the failure.
+        reason: String,
+    },
+    /// A story was blocked (e.g. retry limit exceeded, empty diff).
+    StoryBlocked {
+        /// Work item ID (e.g. `"42_story_my_feature"`).
+        story_id: String,
+        /// Human-readable story name, if available.
+        story_name: Option<String>,
+        /// Human-readable reason the story was blocked.
+        reason: String,
+    },
+    /// An agent hit a soft API rate limit.
+    RateLimitWarning {
+        /// Work item ID the agent was working on.
+        story_id: String,
+        /// Human-readable story name, if available.
+        story_name: Option<String>,
+        /// Name of the agent that hit the limit.
+        agent_name: String,
+    },
+    /// An agent hit a hard API rate limit and will be blocked until `reset_at`.
+    RateLimitHardBlock {
+        /// Work item ID the agent was working on.
+        story_id: String,
+        /// Human-readable story name, if available.
+        story_name: Option<String>,
+        /// Name of the agent that hit the hard limit.
+        agent_name: String,
+        /// UTC instant at which the rate limit resets.
+        reset_at: DateTime<Utc>,
+    },
+}
+
+// ── Subscription ──────────────────────────────────────────────────────────────
+
+/// A per-consumer handle returned by [`StatusBroadcaster::subscribe`].
+///
+/// Each subscription holds its own [`broadcast::Receiver`] and an independent
+/// `enabled` flag.  When disabled, [`Subscription::recv`] silently discards
+/// incoming events until the subscription is re-enabled.
+///
+/// Stories 642/643/644 own the lifecycle of their `Subscription` handles,
+/// including when to call [`enable`](Subscription::enable) and
+/// [`disable`](Subscription::disable).
+pub struct Subscription {
+    receiver: broadcast::Receiver<StatusEvent>,
+    enabled: Arc<AtomicBool>,
+}
+
+impl Subscription {
+    /// Enable this subscription — future events will be delivered to the caller.
+    pub fn enable(&self) {
+        self.enabled.store(true, Ordering::Relaxed);
+    }
+
+    /// Disable this subscription — incoming events are silently discarded until
+    /// [`enable`](Subscription::enable) is called again.
+    pub fn disable(&self) {
+        self.enabled.store(false, Ordering::Relaxed);
+    }
+
+    /// Returns `true` if this subscription is currently enabled.
+    pub fn is_enabled(&self) -> bool {
+        self.enabled.load(Ordering::Relaxed)
+    }
+
+    /// Receive the next event, skipping any that arrive while the subscription
+    /// is disabled.
+    ///
+    /// Returns `None` if the broadcaster has been dropped (channel closed).
+    /// If the receiver is lagging (events were dropped), the lag is cleared and
+    /// reception continues.
+    pub async fn recv(&mut self) -> Option<StatusEvent> {
+        loop {
+            match self.receiver.recv().await {
+                Ok(event) => {
+                    if self.enabled.load(Ordering::Relaxed) {
+                        return Some(event);
+                    }
+                    // Subscription disabled — discard and wait for next.
+                }
+                Err(broadcast::error::RecvError::Lagged(_)) => {
+                    // Dropped some events; continue from current position.
+                    continue;
+                }
+                Err(broadcast::error::RecvError::Closed) => return None,
+            }
+        }
+    }
+
+    /// Returns a clone of the `enabled` flag so the owner can share it with
+    /// another task (e.g. an HTTP handler that toggles the flag).
+    pub fn enabled_flag(&self) -> Arc<AtomicBool> {
+        Arc::clone(&self.enabled)
+    }
+}
+
+// ── StatusBroadcaster ─────────────────────────────────────────────────────────
+
+/// A project-scoped pub-sub hub for pipeline status events.
+///
+/// Constructed once per project in `main.rs` and stored on
+/// [`crate::services::Services`].  Downstream consumers (chat transports, Web
+/// UI, agent context) call [`subscribe`](StatusBroadcaster::subscribe) to
+/// obtain a [`Subscription`] handle; the broadcaster itself only needs to be
+/// called via [`publish`](StatusBroadcaster::publish).
+pub struct StatusBroadcaster {
+    tx: broadcast::Sender<StatusEvent>,
+}
+
+impl StatusBroadcaster {
+    /// Create a new broadcaster with a channel capacity of [`CHANNEL_CAPACITY`].
+    pub fn new() -> Self {
+        let (tx, _) = broadcast::channel(CHANNEL_CAPACITY);
+        Self { tx }
+    }
+
+    /// Publish an event to all currently active, non-lagging subscribers.
+    ///
+    /// If there are no subscribers the send is silently dropped.
+    pub fn publish(&self, event: StatusEvent) {
+        let _ = self.tx.send(event);
+    }
+
+    /// Create a new [`Subscription`] for a downstream consumer.
+    ///
+    /// The subscription starts **enabled** by default.  Pass the returned
+    /// handle to the consuming task; call [`Subscription::disable`] /
+    /// [`Subscription::enable`] to gate delivery independently per consumer.
+    pub fn subscribe(&self) -> Subscription {
+        Subscription {
+            receiver: self.tx.subscribe(),
+            enabled: Arc::new(AtomicBool::new(true)),
+        }
+    }
+
+    /// Create a new [`Subscription`] with an explicit initial enabled state.
+    ///
+    /// Useful when a consumer is provisioned before its transport is ready.
+    pub fn subscribe_with_state(&self, initial_enabled: bool) -> Subscription {
+        Subscription {
+            receiver: self.tx.subscribe(),
+            enabled: Arc::new(AtomicBool::new(initial_enabled)),
+        }
+    }
+}
+
+impl Default for StatusBroadcaster {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+// ── Tests ─────────────────────────────────────────────────────────────────────
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // ── publish / subscribe basics ────────────────────────────────────────────
+
+    #[tokio::test]
+    async fn publish_delivers_to_subscriber() {
+        let broadcaster = StatusBroadcaster::new();
+        let mut sub = broadcaster.subscribe();
+
+        broadcaster.publish(StatusEvent::MergeFailure {
+            story_id: "1_story_a".to_string(),
+            story_name: None,
+            reason: "conflict".to_string(),
+        });
+
+        let received = sub.recv().await.expect("should receive event");
+        assert!(matches!(received, StatusEvent::MergeFailure { .. }));
+    }
+
+    #[tokio::test]
+    async fn publish_fans_out_to_multiple_subscribers() {
+        let broadcaster = StatusBroadcaster::new();
+        let mut sub1 = broadcaster.subscribe();
+        let mut sub2 = broadcaster.subscribe();
+
+        broadcaster.publish(StatusEvent::StoryBlocked {
+            story_id: "2_story_b".to_string(),
+            story_name: None,
+            reason: "retry limit".to_string(),
+        });
+
+        let e1 = sub1.recv().await.expect("sub1 should receive");
+        let e2 = sub2.recv().await.expect("sub2 should receive");
+        assert!(matches!(e1, StatusEvent::StoryBlocked { .. }));
+        assert!(matches!(e2, StatusEvent::StoryBlocked { .. }));
+    }
+
+    #[tokio::test]
+    async fn disabled_subscription_does_not_deliver_until_enabled() {
+        use tokio::time::{Duration, timeout};
+
+        let broadcaster = StatusBroadcaster::new();
+        let mut sub = broadcaster.subscribe_with_state(false);
+
+        // Publish an event while disabled.
+        broadcaster.publish(StatusEvent::StoryBlocked {
+            story_id: "3_story_c".to_string(),
+            story_name: None,
+            reason: "empty diff".to_string(),
+        });
+
+        // recv() internally discards the buffered StoryBlocked event (disabled),
+        // then blocks waiting for the next one.  The timeout proves it does not
+        // return the discarded event.
+        let blocked = timeout(Duration::from_millis(20), sub.recv()).await;
+        assert!(
+            blocked.is_err(),
+            "disabled subscription must not deliver events"
+        );
+
+        // Enable and publish another event — should be delivered.
+        sub.enable();
+        broadcaster.publish(StatusEvent::MergeFailure {
+            story_id: "4_story_d".to_string(),
+            story_name: None,
+            reason: "gate failed".to_string(),
+        });
+
+        let received = timeout(Duration::from_millis(100), sub.recv())
+            .await
+            .expect("should not time out after enabling")
+            .expect("channel should be open");
+        assert!(matches!(received, StatusEvent::MergeFailure { .. }));
+    }
+
+    #[tokio::test]
+    async fn subscribe_with_state_false_starts_disabled() {
+        let broadcaster = StatusBroadcaster::new();
+        let sub = broadcaster.subscribe_with_state(false);
+        assert!(!sub.is_enabled());
+    }
+
+    #[tokio::test]
+    async fn subscribe_starts_enabled_by_default() {
+        let broadcaster = StatusBroadcaster::new();
+        let sub = broadcaster.subscribe();
+        assert!(sub.is_enabled());
+    }
+
+    // ── Multi-project isolation ───────────────────────────────────────────────
+
+    /// Events from project A's broadcaster must not reach project B's subscribers.
+    #[tokio::test]
+    async fn multi_project_isolation_events_do_not_cross_broadcasters() {
+        let broadcaster_a = StatusBroadcaster::new();
+        let broadcaster_b = StatusBroadcaster::new();
+
+        let mut sub_a = broadcaster_a.subscribe();
+        let mut sub_b = broadcaster_b.subscribe();
+
+        // Publish an event only to project A.
+        broadcaster_a.publish(StatusEvent::StageTransition {
+            story_id: "10_story_project_a".to_string(),
+            story_name: Some("Project A Story".to_string()),
+            from_stage: "1_backlog".to_string(),
+            to_stage: "2_current".to_string(),
+        });
+
+        // Publish a different event only to project B.
+        broadcaster_b.publish(StatusEvent::MergeFailure {
+            story_id: "20_story_project_b".to_string(),
+            story_name: Some("Project B Story".to_string()),
+            reason: "b conflict".to_string(),
+        });
+
+        // sub_a should receive project A's event only.
+        let from_a = sub_a.recv().await.expect("sub_a should receive event");
+        match &from_a {
+            StatusEvent::StageTransition { story_id, .. } => {
+                assert_eq!(story_id, "10_story_project_a");
+            }
+            other => panic!("sub_a got wrong event: {other:?}"),
+        }
+
+        // sub_b should receive project B's event only.
+        let from_b = sub_b.recv().await.expect("sub_b should receive event");
+        match &from_b {
+            StatusEvent::MergeFailure { story_id, .. } => {
+                assert_eq!(story_id, "20_story_project_b");
+            }
+            other => panic!("sub_b got wrong event: {other:?}"),
+        }
+
+        // Verify no cross-contamination: sub_a should have no further events.
+        use tokio::time::{Duration, timeout};
+        let cross = timeout(Duration::from_millis(10), sub_a.recv()).await;
+        assert!(cross.is_err(), "sub_a should not receive project B's event");
+    }
+
+    /// Two projects firing events independently must not affect each other.
+    #[tokio::test]
+    async fn multi_project_integration_two_projects_independent() {
+        let ba = StatusBroadcaster::new();
+        let bb = StatusBroadcaster::new();
+
+        let mut sub_a1 = ba.subscribe();
+        let mut sub_a2 = ba.subscribe();
+        let mut sub_b1 = bb.subscribe();
+
+        // Project A fires two events.
+        ba.publish(StatusEvent::StoryBlocked {
+            story_id: "1_story_a_blocked".to_string(),
+            story_name: None,
+            reason: "retry".to_string(),
+        });
+        ba.publish(StatusEvent::MergeFailure {
+            story_id: "2_story_a_fail".to_string(),
+            story_name: None,
+            reason: "conflict".to_string(),
+        });
+
+        // Project B fires one event.
+        bb.publish(StatusEvent::StageTransition {
+            story_id: "3_story_b_move".to_string(),
+            story_name: None,
+            from_stage: "1_backlog".to_string(),
+            to_stage: "2_current".to_string(),
+        });
+
+        // sub_a1 sees both of project A's events.
+        let e1 = sub_a1.recv().await.unwrap();
+        let e2 = sub_a1.recv().await.unwrap();
+        assert!(matches!(e1, StatusEvent::StoryBlocked { .. }));
+        assert!(matches!(e2, StatusEvent::MergeFailure { .. }));
+
+        // sub_a2 also sees both of project A's events.
+        let e3 = sub_a2.recv().await.unwrap();
+        let e4 = sub_a2.recv().await.unwrap();
+        assert!(matches!(e3, StatusEvent::StoryBlocked { .. }));
+        assert!(matches!(e4, StatusEvent::MergeFailure { .. }));
+
+        // sub_b1 sees only project B's event.
+        let e5 = sub_b1.recv().await.unwrap();
+        assert!(matches!(e5, StatusEvent::StageTransition { .. }));
+
+        // No cross-contamination from A to B.
+        use tokio::time::{Duration, timeout};
+        assert!(
+            timeout(Duration::from_millis(10), sub_b1.recv())
+                .await
+                .is_err(),
+            "sub_b1 should not see project A events"
+        );
+    }
+
+    // ── enable/disable flag sharing ───────────────────────────────────────────
+
+    #[tokio::test]
+    async fn enabled_flag_shared_between_tasks() {
+        let broadcaster = StatusBroadcaster::new();
+        let sub = broadcaster.subscribe();
+        let flag = sub.enabled_flag();
+
+        // Disable via the shared flag.
+        flag.store(false, std::sync::atomic::Ordering::Relaxed);
+        assert!(!sub.is_enabled());
+
+        // Re-enable via the subscription directly.
+        sub.enable();
+        assert!(sub.is_enabled());
+        assert!(flag.load(std::sync::atomic::Ordering::Relaxed));
+    }
+
+    // ── no-op when no subscribers ─────────────────────────────────────────────
+
+    #[test]
+    fn publish_with_no_subscribers_does_not_panic() {
+        let broadcaster = StatusBroadcaster::new();
+        // No subscriber — send is silently dropped.
+        broadcaster.publish(StatusEvent::MergeFailure {
+            story_id: "99_story_nobody".to_string(),
+            story_name: None,
+            reason: "no one listening".to_string(),
+        });
+    }
+}