diff --git a/codex-rs/app-server-protocol/src/export.rs b/codex-rs/app-server-protocol/src/export.rs
index b89f23c666..8821477fd8 100644
--- a/codex-rs/app-server-protocol/src/export.rs
+++ b/codex-rs/app-server-protocol/src/export.rs
@@ -179,6 +179,12 @@ pub fn generate_ts_with_options(
         }
     }
 
+    if !ts_files.is_empty() {
+        for file in &ts_files {
+            normalize_typescript_whitespace_in_file(file)?;
+        }
+    }
+
     Ok(())
 }
 
@@ -1907,6 +1913,32 @@ fn prepend_header_if_missing(path: &Path) -> Result<()> {
     Ok(())
 }
 
+fn normalize_typescript_whitespace_in_file(path: &Path) -> Result<()> {
+    let content =
+        fs::read_to_string(path).with_context(|| format!("Failed to read {}", path.display()))?;
+    let normalized = normalize_typescript_whitespace(&content);
+    if normalized == content {
+        return Ok(());
+    }
+
+    fs::write(path, normalized).with_context(|| format!("Failed to write {}", path.display()))?;
+    Ok(())
+}
+
+pub(crate) fn normalize_typescript_whitespace(content: &str) -> String {
+    let mut normalized = String::with_capacity(content.len());
+    for line in content.lines() {
+        normalized.push_str(line.trim_end());
+        normalized.push('\n');
+    }
+
+    if !content.ends_with('\n') {
+        normalized.pop();
+    }
+
+    normalized
+}
+
 fn ts_files_in(dir: &Path) -> Result<Vec<PathBuf>> {
     let mut files = Vec::new();
     for entry in
diff --git a/codex-rs/app-server-protocol/src/schema_fixtures.rs b/codex-rs/app-server-protocol/src/schema_fixtures.rs
index 56dcf33a4d..7319a0b414 100644
--- a/codex-rs/app-server-protocol/src/schema_fixtures.rs
+++ b/codex-rs/app-server-protocol/src/schema_fixtures.rs
@@ -5,6 +5,7 @@ use crate::ServerRequest;
 use crate::export::GENERATED_TS_HEADER;
 use crate::export::filter_experimental_ts_tree;
 use crate::export::generate_index_ts_tree;
+use crate::export::normalize_typescript_whitespace;
 use crate::protocol::common::visit_client_response_types;
 use crate::protocol::common::visit_server_response_types;
 use anyhow::Context;
@@ -140,7 +141,7 @@ fn read_file_bytes(path: &Path) -> Result<Vec<u8>> {
             .strip_prefix(GENERATED_TS_HEADER)
             .unwrap_or(&text)
             .to_string();
-        return Ok(text.into_bytes());
+        return Ok(normalize_typescript_whitespace(&text).into_bytes());
     }
     Ok(bytes)
 }
@@ -278,7 +279,7 @@ fn collect_typescript_fixture_file<T: TS + 'static + ?Sized>(
     let output_path = normalize_relative_fixture_path(&output_path);
     files.insert(
         output_path,
-        contents.replace("\r\n", "\n").replace('\r', "\n"),
+        normalize_typescript_whitespace(&contents.replace("\r\n", "\n").replace('\r', "\n")),
     );
 
     let mut visitor = TypeScriptFixtureCollector {