Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

skd/job/shortrecommend/job_test.go

@@ -0,0 +1,18 @@
+package shortrecommend
+
+import (
+	"testing"
+	"time"
+)
+
+func TestBuildQueueVersionIsUniqueWithinSameDay(t *testing.T) {
+	now := time.Date(2026, 7, 31, 2, 0, 0, 0, time.UTC)
+	first := buildQueueVersion(now, "build-a")
+	second := buildQueueVersion(now, "build-b")
+	if first != "20260731-build-a" || second != "20260731-build-b" {
+		t.Fatalf("versions = %q, %q", first, second)
+	}
+	if first == second {
+		t.Fatal("same-day rebuilds must not reuse a queue version")
+	}
+}