diff --git a/qsl.toml b/qsl.toml
index 9c110dd..286fc25 100644
--- a/qsl.toml
+++ b/qsl.toml
@@ -1,9 +1,10 @@
 tier = "core"
 ring = 0
 allow_legacy = true
-# legacy_reason: constraints.txt remains for pinned downstream git deps and update-qpk-pin workflow.
+legacy_reason = "constraints.txt remains for pinned downstream git deps and update-qpk-pin workflow."
 
 [compat]
 bundle = "2026.07.1"
+live_constraint_files = ["constraints.txt"]
 requires = [
 ]