diff --git a/codex-rs/hooks/src/schema.rs b/codex-rs/hooks/src/schema.rs
index 43fb664deb..9375fd81dd 100644
--- a/codex-rs/hooks/src/schema.rs
+++ b/codex-rs/hooks/src/schema.rs
@@ -10,7 +10,6 @@ use serde::Serialize;
 use serde_json::Map;
 use serde_json::Value;
 use std::path::Path;
-use std::path::PathBuf;
 
 const GENERATED_DIR: &str = "generated";
 const SESSION_START_INPUT_FIXTURE: &str = "session-start.command.input.schema.json";
@@ -22,16 +21,6 @@ const STOP_OUTPUT_FIXTURE: &str = "stop.command.output.schema.json";
 #[serde(transparent)]
 pub(crate) struct NullableString(Option<String>);
 
-impl NullableString {
-    fn from_path(path: Option<PathBuf>) -> Self {
-        Self(path.map(|path| path.display().to_string()))
-    }
-
-    fn from_string(value: Option<String>) -> Self {
-        Self(value)
-    }
-}
-
 impl JsonSchema for NullableString {
     fn schema_name() -> String {
         "NullableString".to_string()
@@ -122,27 +111,6 @@ pub(crate) struct SessionStartCommandInput {
     pub source: String,
 }
 
-impl SessionStartCommandInput {
-    pub(crate) fn new(
-        session_id: impl Into<String>,
-        transcript_path: Option<PathBuf>,
-        cwd: impl Into<String>,
-        model: impl Into<String>,
-        permission_mode: impl Into<String>,
-        source: impl Into<String>,
-    ) -> Self {
-        Self {
-            session_id: session_id.into(),
-            transcript_path: NullableString::from_path(transcript_path),
-            cwd: cwd.into(),
-            hook_event_name: "SessionStart".to_string(),
-            model: model.into(),
-            permission_mode: permission_mode.into(),
-            source: source.into(),
-        }
-    }
-}
-
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 #[serde(deny_unknown_fields)]
 #[schemars(rename = "stop.command.input")]
@@ -159,29 +127,6 @@ pub(crate) struct StopCommandInput {
     pub last_assistant_message: NullableString,
 }
 
-impl StopCommandInput {
-    pub(crate) fn new(
-        session_id: impl Into<String>,
-        transcript_path: Option<PathBuf>,
-        cwd: impl Into<String>,
-        model: impl Into<String>,
-        permission_mode: impl Into<String>,
-        stop_hook_active: bool,
-        last_assistant_message: Option<String>,
-    ) -> Self {
-        Self {
-            session_id: session_id.into(),
-            transcript_path: NullableString::from_path(transcript_path),
-            cwd: cwd.into(),
-            hook_event_name: "Stop".to_string(),
-            model: model.into(),
-            permission_mode: permission_mode.into(),
-            stop_hook_active,
-            last_assistant_message: NullableString::from_string(last_assistant_message),
-        }
-    }
-}
-
 pub fn write_schema_fixtures(schema_root: &Path) -> anyhow::Result<()> {
     let generated_dir = schema_root.join(GENERATED_DIR);
     ensure_empty_dir(&generated_dir)?;