From fd904d45d83cb20657321fdc49da56ea652273a6 Mon Sep 17 00:00:00 2001
From: devangpratap <115096812+devangpratap@users.noreply.github.com>
Date: Tue, 15 Sep 2026 11:15:04 -0400
Subject: [PATCH] Fix completion of paths directly under the root directory

---
 tools/cli/files.go      |  2 +-
 tools/cli/files_test.go | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/cli/files.go b/tools/cli/files.go
index 72e256f2b..453f400af 100644
--- a/tools/cli/files.go
+++ b/tools/cli/files.go
@@ -65,7 +65,7 @@ func CompleteFiles(prefix string, callback func(*FileEntry), cwd string) error {
 			joinable_prefix = prefix
 		} else {
 			idx := strings.LastIndex(prefix, utils.Sep)
-			if idx > 0 {
+			if idx > -1 {
 				joinable_prefix = prefix[:idx+1]
 				base_dir = filepath.Dir(location)
 			}
diff --git a/tools/cli/files_test.go b/tools/cli/files_test.go
index a61268f98..3b2b1de87 100644
--- a/tools/cli/files_test.go
+++ b/tools/cli/files_test.go
@@ -89,6 +89,18 @@ func TestCompleteFiles(t *testing.T) {
 	test_candidates("odir/f", "odir/four.txt")
 	test_candidates("x")
 
+	// a prefix whose only separator is the leading one, such as /us
+	if entries, err := os.ReadDir(utils.Sep); err == nil && len(entries) > 0 {
+		name := entries[0].Name()
+		prefix := utils.Sep + name[:1]
+		found := false
+		CompleteFiles(prefix, func(entry *FileEntry) {
+			found = found || strings.TrimSuffix(entry.CompletionCandidate, utils.Sep) == utils.Sep+name
+		}, "")
+		if !found {
+			t.Fatalf("Did not get %#v as a completion candidate for prefix: %#v", utils.Sep+name, prefix)
+		}
+	}
 }
 
 func TestCompleteExecutables(t *testing.T) {