diff --git a/codex-rs/config/src/state.rs b/codex-rs/config/src/state.rs
index 7f6916ad0a..a34ccc6cdb 100644
--- a/codex-rs/config/src/state.rs
+++ b/codex-rs/config/src/state.rs
@@ -99,10 +99,6 @@ impl ConfigLayerEntry {
         self.disabled_reason.is_some()
     }
 
-    pub fn is_project_layer(&self) -> bool {
-        matches!(self.name, ConfigLayerSource::Project { .. })
-    }
-
     pub fn raw_toml(&self) -> Option<&str> {
         self.raw_toml.as_deref()
     }
diff --git a/codex-rs/hooks/src/engine/discovery.rs b/codex-rs/hooks/src/engine/discovery.rs
index 9434287be9..2d8d266689 100644
--- a/codex-rs/hooks/src/engine/discovery.rs
+++ b/codex-rs/hooks/src/engine/discovery.rs
@@ -1,6 +1,7 @@
 use std::fs;
 use std::path::Path;
 
+use codex_app_server_protocol::ConfigLayerSource;
 use codex_config::ConfigLayerStack;
 use codex_config::ConfigLayerStackOrdering;
 
@@ -94,7 +95,7 @@ pub(crate) fn discover_handlers(config_layer_stack: Option<&ConfigLayerStack>) -
                 &mut warnings,
                 &mut display_order,
                 source_path.as_path(),
-                layer.is_project_layer(),
+                matches!(layer.name, ConfigLayerSource::Project { .. }),
                 event_name,
                 groups,
             );