Preserve codex-exec-server library APIs

codex-rs/exec-server/src/environment.rs

@@ -230,6 +230,12 @@ impl EnvironmentManager {
         self.local_environment.as_ref().map(Arc::clone)
     }
 
+    /// Returns the default environment or local environment when either exists.
+    pub fn default_or_local_environment(&self) -> Option<Arc<Environment>> {
+        self.default_environment()
+            .or_else(|| self.try_local_environment())
+    }
+
     /// Returns a named environment instance.
     pub fn get_environment(&self, environment_id: &str) -> Option<Arc<Environment>> {
         self.environments

codex-rs/exec-server/src/process_id.rs

@@ -10,9 +10,17 @@ use serde::Serialize;
 pub struct ProcessId(String);
 
 impl ProcessId {
+    pub fn new(value: impl Into<String>) -> Self {
+        Self(value.into())
+    }
+
     pub fn as_str(&self) -> &str {
         &self.0
     }
+
+    pub fn into_inner(self) -> String {
+        self.0
+    }
 }
 
 impl Deref for ProcessId {