diff --git a/crates/miroir-core/src/anti_entropy.rs b/crates/miroir-core/src/anti_entropy.rs
index 8713be4..b82a341 100644
--- a/crates/miroir-core/src/anti_entropy.rs
+++ b/crates/miroir-core/src/anti_entropy.rs
@@ -7,7 +7,7 @@ use std::collections::HashMap;
 
 use serde::{Deserialize, Serialize};
 
-use crate::migration::{MigrationConfig, MigrationCoordinator, MigrationError};
+use crate::migration::{MigrationConfig, MigrationError};
 
 /// Anti-entropy configuration (plan §13.8).
 #[derive(Debug, Clone, Serialize, Deserialize)]
diff --git a/crates/miroir-core/src/lib.rs b/crates/miroir-core/src/lib.rs
index 336af15..40cdae0 100644
--- a/crates/miroir-core/src/lib.rs
+++ b/crates/miroir-core/src/lib.rs
@@ -2,9 +2,12 @@
 //!
 //! Provides routing, merging, and topology logic for the Miroir distributed search proxy.
 
+pub mod anti_entropy;
 pub mod config;
 pub mod error;
 pub mod merger;
+pub mod migration;
+pub mod reshard;
 pub mod router;
 pub mod scatter;
 pub mod task;
diff --git a/crates/miroir-core/src/router.rs b/crates/miroir-core/src/router.rs
index 92b5459..37bbd10 100644
--- a/crates/miroir-core/src/router.rs
+++ b/crates/miroir-core/src/router.rs
@@ -1,8 +1,8 @@
 //! Rendezvous hash-based routing and shard assignment.
 
 use crate::topology::{Group, NodeId, Topology};
-use twox_hash::XxHash64;
 use std::hash::{Hash, Hasher};
+use twox_hash::XxHash64;
 
 /// Compute a rendezvous score for a shard+node pair.
 ///
@@ -23,14 +23,19 @@ pub fn assign_shard_in_group(shard_id: u32, group_nodes: &[NodeId], rf: usize) -
         .map(|n| (score(shard_id, n.as_str()), n))
         .collect();
     scored.sort_unstable_by(|a, b| b.0.cmp(&a.0));
-    scored.into_iter().take(rf).map(|(_, n)| n.clone()).collect()
+    scored
+        .into_iter()
+        .take(rf)
+        .map(|(_, n)| n.clone())
+        .collect()
 }
 
 /// All write targets for a document: the RF nodes in EACH replica group.
 pub fn write_targets(shard_id: u32, topology: &Topology) -> Vec<NodeId> {
-    topology.groups().flat_map(|group| {
-        assign_shard_in_group(shard_id, group.nodes(), topology.rf())
-    }).collect()
+    topology
+        .groups()
+        .flat_map(|group| assign_shard_in_group(shard_id, group.nodes(), topology.rf()))
+        .collect()
 }
 
 /// Select the replica group for a query (round-robin by query counter).
@@ -40,11 +45,15 @@ pub fn query_group(query_seq: u64, replica_groups: u32) -> u32 {
 
 /// The covering set for a search: one node per shard within the chosen group.
 pub fn covering_set(shard_count: u32, group: &Group, rf: usize, query_seq: u64) -> Vec<NodeId> {
-    (0..shard_count).map(|shard_id| {
-        let replicas = assign_shard_in_group(shard_id, group.nodes(), rf);
-        // rotate through replicas for intra-group load balancing
-        replicas[(query_seq as usize) % replicas.len()].clone()
-    }).collect::<std::collections::HashSet<_>>().into_iter().collect()
+    (0..shard_count)
+        .map(|shard_id| {
+            let replicas = assign_shard_in_group(shard_id, group.nodes(), rf);
+            // rotate through replicas for intra-group load balancing
+            replicas[(query_seq as usize) % replicas.len()].clone()
+        })
+        .collect::<std::collections::HashSet<_>>()
+        .into_iter()
+        .collect()
 }
 
 /// Compute the shard ID for a document's primary key.
diff --git a/crates/miroir-core/src/task.rs b/crates/miroir-core/src/task.rs
index 59011a7..f62f177 100644
--- a/crates/miroir-core/src/task.rs
+++ b/crates/miroir-core/src/task.rs
@@ -17,7 +17,12 @@ pub trait TaskRegistry: Send + Sync {
     fn update_status(&self, miroir_id: &str, status: TaskStatus) -> Result<()>;
 
     /// Update node task status.
-    fn update_node_task(&self, miroir_id: &str, node_id: &str, node_status: NodeTaskStatus) -> Result<()>;
+    fn update_node_task(
+        &self,
+        miroir_id: &str,
+        node_id: &str,
+        node_status: NodeTaskStatus,
+    ) -> Result<()>;
 
     /// List tasks with optional filtering.
     fn list(&self, filter: TaskFilter) -> Result<Vec<MiroirTask>>;
@@ -126,7 +131,12 @@ impl TaskRegistry for StubTaskRegistry {
         Ok(())
     }
 
-    fn update_node_task(&self, _miroir_id: &str, _node_id: &str, _node_status: NodeTaskStatus) -> Result<()> {
+    fn update_node_task(
+        &self,
+        _miroir_id: &str,
+        _node_id: &str,
+        _node_status: NodeTaskStatus,
+    ) -> Result<()> {
         Ok(())
     }
 
diff --git a/crates/miroir-core/src/topology.rs b/crates/miroir-core/src/topology.rs
index 4cc5cdd..c5cb886 100644
--- a/crates/miroir-core/src/topology.rs
+++ b/crates/miroir-core/src/topology.rs
@@ -143,12 +143,12 @@ impl Topology {
     /// Add a node to the topology.
     pub fn add_node(&mut self, node: Node) {
         let group_id = node.replica_group as usize;
-        
+
         // Ensure group exists
         while self.groups.len() <= group_id {
             self.groups.push(Group::new(self.groups.len() as u32));
         }
-        
+
         self.groups[group_id].add_node(node.id.clone());
         self.nodes.insert(node.id.clone(), node);
     }