Use AbsolutePathBuf in skill loading and codex_home (#17407)

Helps with FS migration later

codex-rs/tui/src/chatwidget/tests/composer_submission.rs

@@ -398,8 +398,8 @@ async fn submission_prefers_selected_duplicate_skill_path() {
     });
     drain_insert_history(&mut rx);
 
-    let repo_skill_path = PathBuf::from("/tmp/repo/figma/SKILL.md");
-    let user_skill_path = PathBuf::from("/tmp/user/figma/SKILL.md");
+    let repo_skill_path = test_path_buf("/tmp/repo/figma/SKILL.md").abs();
+    let user_skill_path = test_path_buf("/tmp/user/figma/SKILL.md").abs();
     chat.set_skills(Some(vec![
         SkillMetadata {
             name: "figma".to_string(),
@@ -445,7 +445,7 @@ async fn submission_prefers_selected_duplicate_skill_path() {
             _ => None,
         })
         .collect::<Vec<_>>();
-    assert_eq!(selected_skill_paths, vec![user_skill_path]);
+    assert_eq!(selected_skill_paths, vec![user_skill_path.to_path_buf()]);
 }
 
 #[tokio::test]

codex-rs/tui/src/chatwidget/tests/helpers.rs

@@ -11,7 +11,7 @@ pub(super) async fn test_config() -> Config {
     let mut config =
         Config::load_default_with_cli_overrides_for_codex_home(codex_home.clone(), Vec::new())
             .expect("config");
-    config.codex_home = codex_home.clone();
+    config.codex_home = codex_home.abs();
     config.sqlite_home = codex_home.clone();
     config.log_dir = codex_home.join("log");
     config.cwd = PathBuf::from(test_path_display("/tmp/project")).abs();
@@ -951,7 +951,7 @@ pub(super) fn plugins_test_detail(
                 description: format!("{name} description"),
                 short_description: None,
                 interface: None,
-                path: PathBuf::from(format!("/skills/{name}/SKILL.md")),
+                path: plugins_test_absolute_path(&format!("skills/{name}/SKILL.md")),
                 enabled: true,
             })
             .collect(),

codex-rs/tui/src/chatwidget/tests/history_replay.rs

@@ -245,10 +245,10 @@ async fn session_configured_syncs_widget_config_permissions_and_cwd() {
         .sandbox_policy
         .set(SandboxPolicy::new_workspace_write_policy())
         .expect("set sandbox policy");
-    chat.config.cwd = PathBuf::from("/home/user/main").abs();
+    chat.config.cwd = test_path_buf("/home/user/main").abs();
 
     let expected_sandbox = SandboxPolicy::new_read_only_policy();
-    let expected_cwd = PathBuf::from("/home/user/sub-agent").abs();
+    let expected_cwd = test_path_buf("/home/user/sub-agent").abs();
     let configured = codex_protocol::protocol::SessionConfiguredEvent {
         session_id: ThreadId::new(),
         forked_from_id: None,
@@ -392,7 +392,9 @@ async fn forked_thread_history_line_includes_name_and_id_snapshot() {
     let (chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     let mut chat = chat;
     let temp = tempdir().expect("tempdir");
-    chat.config.codex_home = temp.path().to_path_buf();
+    chat.config.codex_home =
+        codex_utils_absolute_path::AbsolutePathBuf::from_absolute_path(temp.path())
+            .expect("temp dir is absolute");
 
     let forked_from_id =
         ThreadId::from_string("e9f18a88-8081-4e51-9d4e-8af5cde2d8dd").expect("forked id");
@@ -429,7 +431,9 @@ async fn forked_thread_history_line_without_name_shows_id_once_snapshot() {
     let (chat, mut rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     let mut chat = chat;
     let temp = tempdir().expect("tempdir");
-    chat.config.codex_home = temp.path().to_path_buf();
+    chat.config.codex_home =
+        codex_utils_absolute_path::AbsolutePathBuf::from_absolute_path(temp.path())
+            .expect("temp dir is absolute");
 
     let forked_from_id =
         ThreadId::from_string("019c2d47-4935-7423-a190-05691f566092").expect("forked id");

codex-rs/tui/src/chatwidget/tests/permissions.rs

@@ -51,8 +51,9 @@ async fn preset_matching_accepts_workspace_write_with_extra_roots() {
         .into_iter()
         .find(|p| p.id == "auto")
         .expect("auto preset exists");
+    let extra_root = test_path_buf("/tmp/extra").abs();
     let current_sandbox = SandboxPolicy::WorkspaceWrite {
-        writable_roots: vec![PathBuf::from("C:\\extra").abs()],
+        writable_roots: vec![extra_root],
         read_only_access: Default::default(),
         network_access: false,
         exclude_tmpdir_env_var: false,
@@ -496,7 +497,7 @@ async fn permissions_selection_marks_guardian_approvals_current_with_custom_work
         .features
         .set_enabled(Feature::GuardianApproval, /*enabled*/ true);
 
-    let extra_root = PathBuf::from("/tmp/guardian-approvals-extra").abs();
+    let extra_root = test_path_buf("/tmp/guardian-approvals-extra").abs();
 
     chat.handle_codex_event(Event {
         id: "session-configured-custom-workspace".to_string(),