cap get_loose_ends todo output + add ack_todos_until bulk-clear (#2944)

hive-agent/src/todos.rs

@@ -245,6 +245,34 @@ impl Todos {
         Ok(n)
     }
 
+    /// Bulk-ack every un-acked todo with `id <= up_to` in one shot — the
+    /// same "note the highest id you've seen, clear everything up to it"
+    /// pattern the message inbox's `ack_until` already gives agents, applied
+    /// to this store. Exists for the case a per-id triage loop isn't worth
+    /// it: an agent that hasn't called `get_loose_ends` in a long stretch
+    /// (or one whose producers pile up faster than it triages) can end up
+    /// with a backlog large enough that the rendered list itself becomes
+    /// unwieldy — clearing it in one call is the escape hatch, same
+    /// `acked`-not-deleted semantics as [`Self::mark_done`] (a reconciled
+    /// producer's next `upsert` still sees the row to compare against).
+    /// Returns the number of rows newly acked.
+    ///
+    /// # Errors
+    ///
+    /// Propagates the sqlite update failure.
+    ///
+    /// # Panics
+    ///
+    /// Panics if the connection mutex is poisoned.
+    pub fn mark_done_until(&self, up_to: i64) -> Result<usize> {
+        let conn = self.conn.lock().unwrap();
+        let n = conn.execute(
+            "UPDATE todos SET acked = 1, acked_at = ?1 WHERE acked = 0 AND id <= ?2",
+            params![Utc::now().timestamp(), up_to],
+        )?;
+        Ok(n)
+    }
+
     /// List todos, newest-updated first. `subsystem = Some(..)` filters to
     /// one producer's set; `None` returns all. Excludes acked rows — once
     /// the agent has dismissed a todo it stays out of its own list, even
@@ -476,6 +504,27 @@ mod tests {
         assert!(!s.has_any().unwrap(), "acked-only table reads as empty");
     }
 
+    /// `mark_done_until` acks everything at-or-below the threshold id and
+    /// leaves later rows untouched, mirroring `ack_until`'s inbox semantics.
+    #[test]
+    fn mark_done_until_acks_up_to_threshold_only() {
+        let (_dir, s) = store();
+        let (id1, _) = s.upsert("bash", None, "task 1", None).unwrap();
+        let (id2, _) = s.upsert("bash", None, "task 2", None).unwrap();
+        let (id3, _) = s.upsert("bash", None, "task 3", None).unwrap();
+        assert_eq!(
+            s.mark_done_until(id2).unwrap(),
+            2,
+            "acks id1 and id2, not id3"
+        );
+        let left = s.list(None).unwrap();
+        assert_eq!(left.len(), 1);
+        assert_eq!(left[0].id, id3);
+        // Idempotent: re-running over the same range acks nothing new.
+        assert_eq!(s.mark_done_until(id2).unwrap(), 0);
+        let _ = id1;
+    }
+
     /// `reap_acked` only removes acked rows past the cutoff — a recent ack
     /// and any un-acked row both survive.
     #[test]