diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 43e94f4..05e1004 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -1,3 +1,4 @@
+// M-AI-02: Unified AiJob Expand — see docs/architecture/adr-002-ai-job-database-expand.md
 generator client {
   provider      = "prisma-client-js"
   binaryTargets = ["native", "linux-musl-openssl-3.0.x"]