diff --git a/src/protocol/codec.rs b/src/protocol/codec.rs
index 8c294f7..3f0f462 100644
--- a/src/protocol/codec.rs
+++ b/src/protocol/codec.rs
@@ -212,7 +212,7 @@ where
 
 fn align_section(bytes: &[u8]) -> AlignedVec {
     if bytes.as_ptr().align_offset(16) == 0 {
-        // Still need to return AlignedVec for the API, but maybe we can avoid 
+        // Still need to return AlignedVec for the API, but maybe we can avoid
         // some overhead. Actually, AlignedVec is just a wrapper around Vec.
     }
     let mut aligned = AlignedVec::with_capacity(bytes.len());
diff --git a/src/protocol/tests/protocol.rs b/src/protocol/tests/protocol.rs
index 1374fe1..50698df 100644
--- a/src/protocol/tests/protocol.rs
+++ b/src/protocol/tests/protocol.rs
@@ -81,7 +81,10 @@ fn header_and_call_validation_reject_invalid_combinations() {
 #[test]
 fn procedure_validation_accepts_introspection_and_rejects_bad_shapes() {
     assert_eq!(validate_procedure_id(""), Ok(()));
-    assert_eq!(validate_procedure_id("unshell.echo.v01.alpha.invoke"), Ok(()));
+    assert_eq!(
+        validate_procedure_id("unshell.echo.v01.alpha.invoke"),
+        Ok(())
+    );
     assert_eq!(
         validate_procedure_id("contains spaces"),
         Err(ValidationError::ProcedureId(
diff --git a/src/protocol/tests/tree.rs b/src/protocol/tests/tree.rs
index 1d5c8cd..abffde9 100644
--- a/src/protocol/tests/tree.rs
+++ b/src/protocol/tests/tree.rs
@@ -80,7 +80,11 @@ fn protocol_endpoint_introspection_returns_leaf_summary() {
     assert!(outcome.forwards.is_empty());
     assert_eq!(outcome.events.len(), 1);
 
-    let LocalEvent::Data { header, message: response } = &outcome.events[0] else {
+    let LocalEvent::Data {
+        header,
+        message: response,
+    } = &outcome.events[0]
+    else {
         panic!("expected local data event");
     };
     assert_eq!(header.packet_type, PacketType::Data);
diff --git a/src/protocol/traits.rs b/src/protocol/traits.rs
index 86c91e2..2ad31d5 100644
--- a/src/protocol/traits.rs
+++ b/src/protocol/traits.rs
@@ -8,8 +8,8 @@ use alloc::{string::String, vec::Vec};
 use super::{
     FrameBytes, FrameCodec, LeafIntrospection, LeafIntrospectionSummary,
     tree::{
-        ActiveHook, Endpoint, EndpointError, EndpointOutcome, HookConflict, HookKey, HookTable, Ingress,
-        LeafNode, LeafSpec, PendingHook, RouteProvider,
+        ActiveHook, Endpoint, EndpointError, EndpointOutcome, HookConflict, HookKey, HookTable,
+        Ingress, LeafNode, LeafSpec, PendingHook, RouteProvider,
     },
 };
 
diff --git a/src/protocol/tree/endpoint/core.rs b/src/protocol/tree/endpoint/core.rs
index 03d273f..1831477 100644
--- a/src/protocol/tree/endpoint/core.rs
+++ b/src/protocol/tree/endpoint/core.rs
@@ -12,8 +12,9 @@ use alloc::{
 };
 use core::fmt;
 
-use crate::protocol::{CallMessage, DataMessage, FaultMessage, FrameBytes, FrameError, PacketHeader,
-    ValidationError};
+use crate::protocol::{
+    CallMessage, DataMessage, FaultMessage, FrameBytes, FrameError, PacketHeader, ValidationError,
+};
 
 use super::super::{HookTable, RouteDecision};
 
diff --git a/src/protocol/tree/endpoint/hooks.rs b/src/protocol/tree/endpoint/hooks.rs
index bf5742c..ce683d5 100644
--- a/src/protocol/tree/endpoint/hooks.rs
+++ b/src/protocol/tree/endpoint/hooks.rs
@@ -5,10 +5,12 @@
 
 use alloc::{string::String, vec};
 
-use crate::protocol::{DataMessage, FaultMessage, PacketHeader, PacketType, ProtocolFault, encode_packet};
+use crate::protocol::{
+    DataMessage, FaultMessage, PacketHeader, PacketType, ProtocolFault, encode_packet,
+};
 
-use super::core::{EndpointError, EndpointOutcome, Ingress, LocalEvent, ProtocolEndpoint};
 use super::super::{HookKey, RouteDecision, route_destination};
+use super::core::{EndpointError, EndpointOutcome, Ingress, LocalEvent, ProtocolEndpoint};
 
 impl ProtocolEndpoint {
     /// Emits a protocol fault only when the original call declared a response hook.
@@ -167,11 +169,7 @@ impl ProtocolEndpoint {
     /// Rationale: this looks backwards at first because parent ingress accepts
     /// non-local source paths. That is required for multi-hop routing, where a
     /// parent forwards traffic originating from ancestors or siblings.
-    pub(crate) fn valid_source_for_ingress(
-        &self,
-        ingress: &Ingress,
-        src_path: &[String],
-    ) -> bool {
+    pub(crate) fn valid_source_for_ingress(&self, ingress: &Ingress, src_path: &[String]) -> bool {
         match ingress {
             Ingress::Parent => {
                 if src_path.len() < self.path.len() {
diff --git a/src/protocol/tree/endpoint/introspection.rs b/src/protocol/tree/endpoint/introspection.rs
index 4bc7e72..aa149e5 100644
--- a/src/protocol/tree/endpoint/introspection.rs
+++ b/src/protocol/tree/endpoint/introspection.rs
@@ -11,8 +11,8 @@ use crate::protocol::{
     PacketHeader, PacketType, ProtocolFault, encode_packet,
 };
 
-use super::core::{EndpointError, EndpointOutcome, ProtocolEndpoint};
 use super::super::HookKey;
+use super::core::{EndpointError, EndpointOutcome, ProtocolEndpoint};
 
 impl ProtocolEndpoint {
     /// Handles the reserved introspection procedure.
diff --git a/src/protocol/tree/endpoint/mod.rs b/src/protocol/tree/endpoint/mod.rs
index 343589a..d132437 100644
--- a/src/protocol/tree/endpoint/mod.rs
+++ b/src/protocol/tree/endpoint/mod.rs
@@ -17,6 +17,6 @@ mod introspection;
 mod receive;
 
 pub use core::{
-    ChildRoute, ConnectionState, Endpoint, EndpointError, EndpointOutcome, Ingress,
-    LeafBehavior, LeafSpec, LocalEvent, ProtocolEndpoint,
+    ChildRoute, ConnectionState, Endpoint, EndpointError, EndpointOutcome, Ingress, LeafBehavior,
+    LeafSpec, LocalEvent, ProtocolEndpoint,
 };
diff --git a/src/protocol/tree/endpoint/receive.rs b/src/protocol/tree/endpoint/receive.rs
index 5ace710..41fa27e 100644
--- a/src/protocol/tree/endpoint/receive.rs
+++ b/src/protocol/tree/endpoint/receive.rs
@@ -10,8 +10,10 @@ use crate::protocol::{
     introspection::INTROSPECTION_PROCEDURE_ID, validate_call, validate_header,
 };
 
-use super::core::{Endpoint, EndpointError, EndpointOutcome, Ingress, LocalEvent, ProtocolEndpoint};
 use super::super::{HookKey, PendingHook, RouteDecision};
+use super::core::{
+    Endpoint, EndpointError, EndpointOutcome, Ingress, LocalEvent, ProtocolEndpoint,
+};
 
 impl ProtocolEndpoint {
     /// Handles a locally delivered `Call` packet after routing selected `Local`.
@@ -49,7 +51,11 @@ impl ProtocolEndpoint {
             Some(leaf_name) => self
                 .leaves
                 .get(leaf_name)
-                .map(|leaf| leaf.procedures.iter().any(|procedure| procedure == &message.procedure_id))
+                .map(|leaf| {
+                    leaf.procedures
+                        .iter()
+                        .any(|procedure| procedure == &message.procedure_id)
+                })
                 .unwrap_or(false),
             None => self.endpoint_procedures.contains(&message.procedure_id),
         };
@@ -71,7 +77,11 @@ impl ProtocolEndpoint {
             self.hooks.activate_pending(key, header.src_path.clone());
         }
 
-        match header.dst_leaf.as_ref().and_then(|name| self.leaves.get(name)) {
+        match header
+            .dst_leaf
+            .as_ref()
+            .and_then(|name| self.leaves.get(name))
+        {
             Some(leaf) if leaf.behavior == super::core::LeafBehavior::Echo && key.is_some() => {
                 let hook = message.response_hook.expect("synchronized");
                 let response = DataMessage {
diff --git a/src/protocol/tree/mod.rs b/src/protocol/tree/mod.rs
index f9cbf18..d930d09 100644
--- a/src/protocol/tree/mod.rs
+++ b/src/protocol/tree/mod.rs
@@ -5,8 +5,8 @@ mod hook;
 mod routing;
 
 pub use endpoint::{
-    ChildRoute, ConnectionState, Endpoint, EndpointError, EndpointOutcome, Ingress,
-    LeafBehavior, LeafSpec, LocalEvent, ProtocolEndpoint,
+    ChildRoute, ConnectionState, Endpoint, EndpointError, EndpointOutcome, Ingress, LeafBehavior,
+    LeafSpec, LocalEvent, ProtocolEndpoint,
 };
 pub use hook::{ActiveHook, HookConflict, HookKey, HookTable, PendingHook};
 pub use routing::{
diff --git a/src/protocol/tree/routing.rs b/src/protocol/tree/routing.rs
index c808d98..be50df1 100644
--- a/src/protocol/tree/routing.rs
+++ b/src/protocol/tree/routing.rs
@@ -87,8 +87,7 @@ pub trait RouteProvider {
     ) -> RouteDecision
     where
         I: IntoIterator,
-        I::Item: AsRef<[String]>,
-    ;
+        I::Item: AsRef<[String]>;
 }
 
 /// Default routing implementation using the protocol's longest-prefix rule.
diff --git a/src/protocol/validation.rs b/src/protocol/validation.rs
index a59e761..29a983b 100644
--- a/src/protocol/validation.rs
+++ b/src/protocol/validation.rs
@@ -69,7 +69,10 @@ pub fn validate_procedure_id(procedure_id: &str) -> Result<(), ValidationError>
         ));
     }
 
-    if !procedure_id.chars().all(|ch| ch.is_ascii_alphanumeric() || ch == '_' || ch == '.') {
+    if !procedure_id
+        .chars()
+        .all(|ch| ch.is_ascii_alphanumeric() || ch == '_' || ch == '.')
+    {
         return Err(ValidationError::ProcedureId(
             "procedure identifier should use alphanumeric characters, dots, and underscores",
         ));