diff --git a/codex-rs/rollout/src/compression.rs b/codex-rs/rollout/src/compression.rs
index 98d514c529..1370e194ae 100644
--- a/codex-rs/rollout/src/compression.rs
+++ b/codex-rs/rollout/src/compression.rs
@@ -89,7 +89,12 @@ pub(crate) async fn file_modified_time(path: &Path) -> io::Result<Option<time::O
     Ok(modified.map(time::OffsetDateTime::from))
 }
 
-pub(crate) async fn open_rollout_line_reader(path: &Path) -> io::Result<RolloutLineReader> {
+/// Opens a rollout line reader that transparently handles plain `.jsonl` and `.jsonl.zst` files.
+///
+/// If the requested path disappears during a compression or decompression transition, this retries
+/// the matching plain/compressed sibling once so readers do not need to know which representation is
+/// currently stored on disk.
+pub async fn open_rollout_line_reader(path: &Path) -> io::Result<RolloutLineReader> {
     match open_rollout_line_reader_once(path).await {
         Ok(reader) => Ok(reader),
         Err(err) if err.kind() == io::ErrorKind::NotFound => {
@@ -191,7 +196,8 @@ pub(crate) fn should_skip_compressed_sibling(path: &Path) -> bool {
     is_compressed_rollout_path(path) && plain_rollout_path(path).exists()
 }
 
-pub(crate) struct RolloutLineReader {
+/// Line-oriented rollout reader returned by [`open_rollout_line_reader`].
+pub struct RolloutLineReader {
     inner: RolloutLineReaderInner,
 }
 
@@ -201,7 +207,8 @@ enum RolloutLineReaderInner {
 }
 
 impl RolloutLineReader {
-    pub(crate) async fn next_line(&mut self) -> io::Result<Option<String>> {
+    /// Reads the next JSONL record from the rollout.
+    pub async fn next_line(&mut self) -> io::Result<Option<String>> {
         match &mut self.inner {
             RolloutLineReaderInner::Plain(lines) => lines.next_line().await,
             RolloutLineReaderInner::Memory(lines) => lines.next().transpose(),
diff --git a/codex-rs/rollout/src/lib.rs b/codex-rs/rollout/src/lib.rs
index 6019f6b7f9..863bc453c1 100644
--- a/codex-rs/rollout/src/lib.rs
+++ b/codex-rs/rollout/src/lib.rs
@@ -33,7 +33,9 @@ pub static INTERACTIVE_SESSION_SOURCES: LazyLock<Vec<SessionSource>> = LazyLock:
 });
 
 pub use codex_protocol::protocol::SessionMeta;
+pub use compression::RolloutLineReader;
 pub use compression::existing_rollout_path;
+pub use compression::open_rollout_line_reader;
 pub use compression::spawn_rollout_compression_worker;
 pub use config::Config;
 pub use config::RolloutConfig;
diff --git a/codex-rs/tui/src/app/config_persistence.rs b/codex-rs/tui/src/app/config_persistence.rs
index e83662c2a2..89060fe0d3 100644
--- a/codex-rs/tui/src/app/config_persistence.rs
+++ b/codex-rs/tui/src/app/config_persistence.rs
@@ -225,22 +225,11 @@ impl App {
         current_cwd: &Path,
         resume_cwd: PathBuf,
     ) -> Result<Config> {
-        match self.rebuild_config_for_cwd(resume_cwd.clone()).await {
-            Ok(config) => Ok(config),
-            Err(err) => {
-                if crate::session_resume::cwds_differ(current_cwd, &resume_cwd) {
-                    Err(err)
-                } else {
-                    let resume_cwd_display = resume_cwd.display().to_string();
-                    tracing::warn!(
-                        error = %err,
-                        cwd = %resume_cwd_display,
-                        "failed to rebuild config for same-cwd resume; using current in-memory config"
-                    );
-                    Ok(self.config.clone())
-                }
-            }
+        if !crate::session_resume::cwds_differ(current_cwd, &resume_cwd) {
+            return Ok(self.config.clone());
         }
+
+        self.rebuild_config_for_cwd(resume_cwd).await
     }
 
     pub(super) fn apply_runtime_policy_overrides(&mut self, config: &mut Config) {
@@ -1220,12 +1209,16 @@ terminal_resize_reflow_max_rows = 9000
     }
 
     #[tokio::test]
-    async fn rebuild_config_for_resume_or_fallback_uses_current_config_on_same_cwd_error()
-    -> Result<()> {
+    async fn rebuild_config_for_resume_or_fallback_reuses_current_config_on_same_cwd() -> Result<()>
+    {
         let mut app = make_test_app().await;
         let codex_home = tempdir()?;
         app.config.codex_home = codex_home.path().to_path_buf().abs();
-        std::fs::write(codex_home.path().join("config.toml"), "[broken")?;
+        app.config.model = Some("already-loaded-model".to_string());
+        std::fs::write(
+            codex_home.path().join("config.toml"),
+            "model = \"freshly-loaded-model\"",
+        )?;
         let current_config = app.config.clone();
         let current_cwd = current_config.cwd.clone();
 
diff --git a/codex-rs/tui/src/session_resume.rs b/codex-rs/tui/src/session_resume.rs
index 9b47599edc..56b258704e 100644
--- a/codex-rs/tui/src/session_resume.rs
+++ b/codex-rs/tui/src/session_resume.rs
@@ -14,11 +14,11 @@ use crate::cwd_prompt::CwdPromptOutcome;
 use crate::cwd_prompt::CwdSelection;
 use crate::tui::Tui;
 use codex_protocol::ThreadId;
+use codex_rollout::open_rollout_line_reader;
 use codex_state::StateRuntime;
 use codex_utils_path as path_utils;
 use serde::Deserialize;
 use serde_json::Value;
-use tokio::io::AsyncBufReadExt;
 
 #[derive(Default)]
 struct RolloutResumeState {
@@ -142,13 +142,11 @@ pub(crate) fn cwds_differ(current_cwd: &Path, session_cwd: &Path) -> bool {
 }
 
 async fn read_rollout_resume_state(path: &Path) -> io::Result<RolloutResumeState> {
-    let file = tokio::fs::File::open(path).await?;
-    let reader = tokio::io::BufReader::new(file);
-    let mut lines = reader.lines();
+    let mut reader = open_rollout_line_reader(path).await?;
     let mut state = RolloutResumeState::default();
     let mut saw_record = false;
 
-    while let Some(line) = lines.next_line().await? {
+    while let Some(line) = reader.next_line().await? {
         let trimmed = line.trim();
         if trimmed.is_empty() {
             continue;