feat: guard git enrichment (#26175)

Skip turn git metadata enrichment when a turn has remote or multiple
executors, so we do not report the orchestrator checkout as executor
workspace metadata.

Test: `just test -p codex-core` (blocked by existing
`Session::conversation_id` compile error in `close_agent.rs`).

codex-rs/core/src/environment_selection.rs

@@ -50,6 +50,14 @@ impl ResolvedTurnEnvironments {
         self.primary()
             .map(|environment| environment.environment.get_filesystem())
     }
+
+    pub(crate) fn single_local_environment_cwd(&self) -> Option<&AbsolutePathBuf> {
+        let [environment] = self.turn_environments.as_slice() else {
+            return None;
+        };
+
+        (!environment.environment.is_remote()).then_some(&environment.cwd)
+    }
 }
 
 pub(crate) fn resolve_environment_selections(
@@ -210,4 +218,55 @@ url = "ws://127.0.0.1:8765"
         );
         assert_eq!(resolved.primary().expect("primary environment").shell, None);
     }
+
+    #[tokio::test]
+    async fn single_local_environment_cwd_requires_exactly_one_local_environment() {
+        let cwd = AbsolutePathBuf::current_dir().expect("cwd");
+        let local_manager = EnvironmentManager::default_for_tests();
+        let local = resolve_environment_selections(
+            &local_manager,
+            &[TurnEnvironmentSelection {
+                environment_id: LOCAL_ENVIRONMENT_ID.to_string(),
+                cwd: cwd.clone(),
+            }],
+        )
+        .expect("local environment should resolve");
+        let remote_manager = EnvironmentManager::create_for_tests(
+            Some("ws://127.0.0.1:8765".to_string()),
+            Some(test_runtime_paths()),
+        )
+        .await;
+        let remote = resolve_environment_selections(
+            &remote_manager,
+            &[TurnEnvironmentSelection {
+                environment_id: REMOTE_ENVIRONMENT_ID.to_string(),
+                cwd: cwd.clone(),
+            }],
+        )
+        .expect("remote environment should resolve");
+        local_manager
+            .upsert_environment(
+                REMOTE_ENVIRONMENT_ID.to_string(),
+                "ws://127.0.0.1:8765".to_string(),
+            )
+            .expect("remote environment should register");
+        let multiple = resolve_environment_selections(
+            &local_manager,
+            &[
+                TurnEnvironmentSelection {
+                    environment_id: LOCAL_ENVIRONMENT_ID.to_string(),
+                    cwd: cwd.clone(),
+                },
+                TurnEnvironmentSelection {
+                    environment_id: REMOTE_ENVIRONMENT_ID.to_string(),
+                    cwd: cwd.clone(),
+                },
+            ],
+        )
+        .expect("multiple environments should resolve");
+
+        assert_eq!(local.single_local_environment_cwd(), Some(&cwd));
+        assert_eq!(remote.single_local_environment_cwd(), None);
+        assert_eq!(multiple.single_local_environment_cwd(), None);
+    }
 }

codex-rs/core/src/session/review.rs

@@ -160,7 +160,9 @@ pub(super) async fn spawn_review_thread(
         client_id: None,
     }];
     let tc = Arc::new(review_turn_context);
-    tc.turn_metadata_state.spawn_git_enrichment_task();
+    if tc.environments.single_local_environment_cwd().is_some() {
+        tc.turn_metadata_state.spawn_git_enrichment_task();
+    }
     // TODO(ccunningham): Review turns currently rely on `spawn_task` for TurnComplete but do not
     // emit a parent TurnStarted. Consider giving review a full parent turn lifecycle
     // (TurnStarted + TurnComplete) for consistency with other standalone tasks.

codex-rs/core/src/session/turn_context.rs

@@ -814,7 +814,13 @@ impl Session {
             turn_context.final_output_json_schema = final_schema;
         }
         let turn_context = Arc::new(turn_context);
-        turn_context.turn_metadata_state.spawn_git_enrichment_task();
+        if turn_context
+            .environments
+            .single_local_environment_cwd()
+            .is_some()
+        {
+            turn_context.turn_metadata_state.spawn_git_enrichment_task();
+        }
         turn_context
     }