fix(core): preserve absolute workdir paths

Co-authored-by: Codex <noreply@openai.com>

codex-rs/core/src/codex.rs

@@ -924,9 +924,12 @@ impl TurnContext {
     }
 
     pub(crate) fn resolve_path(&self, path: Option<String>) -> PathBuf {
-        path.as_ref()
-            .map(PathBuf::from)
-            .map_or_else(|| self.cwd.clone(), |p| self.cwd.join(p))
+        path.as_ref().map(PathBuf::from).map_or_else(
+            || self.cwd.clone(),
+            |p| {
+                if p.is_absolute() { p } else { self.cwd.join(p) }
+            },
+        )
     }
 
     pub(crate) fn compact_prompt(&self) -> &str {

codex-rs/core/src/tools/handlers/shell_tests.rs

@@ -112,6 +112,39 @@ async fn shell_command_handler_to_exec_params_uses_session_shell_and_turn_contex
     assert_eq!(exec_params.arg0, None);
 }
 
+#[tokio::test]
+async fn shell_command_handler_to_exec_params_preserves_absolute_workdir() {
+    let (session, turn_context) = make_session_and_context().await;
+    let absolute_workdir = turn_context.cwd.join("absolute-subdir");
+    let expected_env = create_env(
+        &turn_context.shell_environment_policy,
+        Some(session.conversation_id),
+    );
+
+    let params = ShellCommandToolCallParams {
+        command: "echo hello".to_string(),
+        workdir: Some(absolute_workdir.to_string_lossy().to_string()),
+        login: None,
+        timeout_ms: Some(250),
+        sandbox_permissions: Some(SandboxPermissions::UseDefault),
+        additional_permissions: None,
+        prefix_rule: None,
+        justification: None,
+    };
+
+    let exec_params = ShellCommandHandler::to_exec_params(
+        &params,
+        &session,
+        &turn_context,
+        session.conversation_id,
+        true,
+    )
+    .expect("absolute workdir should be accepted");
+
+    assert_eq!(exec_params.cwd, absolute_workdir);
+    assert_eq!(exec_params.env, expected_env);
+}
+
 #[test]
 fn shell_command_handler_respects_explicit_login_flag() {
     let (_tx, shell_snapshot) = watch::channel(Some(Arc::new(ShellSnapshot {