From 77d52ae7276d4f016c3bacefe8afdfc0e6373cb3 Mon Sep 17 00:00:00 2001
From: Adam Perry <anp@openai.com>
Date: Thu, 9 Jul 2026 09:52:42 +0000
Subject: [PATCH] perf(skills): raise root scan concurrency

(cherry picked from commit e3db22795107c218f4b98f763522326a979dbbe6)
---
 codex-rs/core-skills/src/root_loader.rs       | 2 +-
 codex-rs/core-skills/src/root_loader_tests.rs | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/codex-rs/core-skills/src/root_loader.rs b/codex-rs/core-skills/src/root_loader.rs
index 8bb1214ee9..d508e93b52 100644
--- a/codex-rs/core-skills/src/root_loader.rs
+++ b/codex-rs/core-skills/src/root_loader.rs
@@ -13,7 +13,7 @@ use crate::loader::SkillRootSnapshot;
 use crate::loader::load_skill_root;
 use crate::model::SkillFileSystemsByPath;
 
-const MAX_CONCURRENT_ROOT_SCANS: usize = 4;
+const MAX_CONCURRENT_ROOT_SCANS: usize = 5;
 
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
 enum RootScanPriority {
diff --git a/codex-rs/core-skills/src/root_loader_tests.rs b/codex-rs/core-skills/src/root_loader_tests.rs
index bad9ebaf45..540573e68e 100644
--- a/codex-rs/core-skills/src/root_loader_tests.rs
+++ b/codex-rs/core-skills/src/root_loader_tests.rs
@@ -1,3 +1,4 @@
+use std::collections::HashSet;
 use std::fs;
 use std::path::Path;
 use std::path::PathBuf;
@@ -401,11 +402,11 @@ async fn starts_agents_skill_roots_before_other_pending_scans() {
     });
     file_system.wait_for_walks(MAX_CONCURRENT_ROOT_SCANS).await;
     assert_eq!(
-        file_system.walk_paths(),
+        file_system.walk_paths().into_iter().collect::<HashSet<_>>(),
         agents_roots
             .iter()
             .map(|root| PathUri::from_host_native_path(root).expect("agents root"))
-            .collect::<Vec<_>>()
+            .collect::<HashSet<_>>()
     );
 
     walk_gate.add_permits(MAX_CONCURRENT_ROOT_SCANS);