feat: add ecc2 daemon auto-dispatch pass

ecc2/src/session/daemon.rs

@@ -1,7 +1,9 @@
 use anyhow::Result;
+use std::future::Future;
 use std::time::Duration;
 use tokio::time;
 
+use super::manager;
 use super::store::StateStore;
 use super::SessionState;
 use crate::config::Config;
@@ -20,6 +22,10 @@ pub async fn run(db: StateStore, cfg: Config) -> Result<()> {
             tracing::error!("Session check failed: {e}");
         }
 
+        if let Err(e) = maybe_auto_dispatch(&db, &cfg).await {
+            tracing::error!("Auto-dispatch pass failed: {e}");
+        }
+
         time::sleep(heartbeat_interval).await;
     }
 }
@@ -83,6 +89,53 @@ fn check_sessions(db: &StateStore, timeout: Duration) -> Result<()> {
     Ok(())
 }
 
+async fn maybe_auto_dispatch(db: &StateStore, cfg: &Config) -> Result<usize> {
+    if !cfg.auto_dispatch_unread_handoffs {
+        return Ok(0);
+    }
+
+    let outcomes = manager::auto_dispatch_backlog(
+        db,
+        cfg,
+        &cfg.default_agent,
+        true,
+        cfg.max_parallel_sessions,
+    )
+    .await?;
+    let routed: usize = outcomes.iter().map(|outcome| outcome.routed.len()).sum();
+
+    if routed > 0 {
+        tracing::info!(
+            "Auto-dispatched {routed} task handoff(s) across {} lead session(s)",
+            outcomes.len()
+        );
+    }
+
+    Ok(routed)
+}
+
+async fn maybe_auto_dispatch_with<F, Fut>(cfg: &Config, dispatch: F) -> Result<usize>
+where
+    F: Fn() -> Fut,
+    Fut: Future<Output = Result<Vec<manager::LeadDispatchOutcome>>>,
+{
+    if !cfg.auto_dispatch_unread_handoffs {
+        return Ok(0);
+    }
+
+    let outcomes = dispatch().await?;
+    let routed: usize = outcomes.iter().map(|outcome| outcome.routed.len()).sum();
+
+    if routed > 0 {
+        tracing::info!(
+            "Auto-dispatched {routed} task handoff(s) across {} lead session(s)",
+            outcomes.len()
+        );
+    }
+
+    Ok(routed)
+}
+
 #[cfg(unix)]
 fn pid_is_alive(pid: u32) -> bool {
     if pid == 0 {
@@ -109,6 +162,7 @@ fn pid_is_alive(_pid: u32) -> bool {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::session::manager::{AssignmentAction, InboxDrainOutcome, LeadDispatchOutcome};
     use crate::session::{Session, SessionMetrics, SessionState};
     use std::path::PathBuf;
 
@@ -175,4 +229,73 @@ mod tests {
         let _ = std::fs::remove_file(path);
         Ok(())
     }
+
+    #[tokio::test]
+    async fn maybe_auto_dispatch_noops_when_disabled() -> Result<()> {
+        let path = temp_db_path();
+        let _store = StateStore::open(&path)?;
+        let cfg = Config::default();
+        let invoked = std::sync::Arc::new(std::sync::atomic::AtomicBool::new(false));
+        let invoked_flag = invoked.clone();
+
+        let routed = maybe_auto_dispatch_with(&cfg, move || {
+            let invoked_flag = invoked_flag.clone();
+            async move {
+                invoked_flag.store(true, std::sync::atomic::Ordering::SeqCst);
+                Ok(Vec::new())
+            }
+        })
+        .await?;
+
+        assert_eq!(routed, 0);
+        assert!(!invoked.load(std::sync::atomic::Ordering::SeqCst));
+        let _ = std::fs::remove_file(path);
+        Ok(())
+    }
+
+    #[tokio::test]
+    async fn maybe_auto_dispatch_reports_total_routed_work() -> Result<()> {
+        let path = temp_db_path();
+        let _store = StateStore::open(&path)?;
+        let mut cfg = Config::default();
+        cfg.auto_dispatch_unread_handoffs = true;
+
+        let routed = maybe_auto_dispatch_with(&cfg, || async move {
+            Ok(vec![
+                LeadDispatchOutcome {
+                    lead_session_id: "lead-a".to_string(),
+                    unread_count: 2,
+                    routed: vec![
+                        InboxDrainOutcome {
+                            message_id: 1,
+                            task: "Task A".to_string(),
+                            session_id: "worker-a".to_string(),
+                            action: AssignmentAction::Spawned,
+                        },
+                        InboxDrainOutcome {
+                            message_id: 2,
+                            task: "Task B".to_string(),
+                            session_id: "worker-b".to_string(),
+                            action: AssignmentAction::ReusedIdle,
+                        },
+                    ],
+                },
+                LeadDispatchOutcome {
+                    lead_session_id: "lead-b".to_string(),
+                    unread_count: 1,
+                    routed: vec![InboxDrainOutcome {
+                        message_id: 3,
+                        task: "Task C".to_string(),
+                        session_id: "worker-c".to_string(),
+                        action: AssignmentAction::ReusedActive,
+                    }],
+                },
+            ])
+        })
+        .await?;
+
+        assert_eq!(routed, 3);
+        let _ = std::fs::remove_file(path);
+        Ok(())
+    }
 }