diff --git a/src/GmRelay.Bot/Migrations/V027__add_showcase_fields.sql b/src/GmRelay.Bot/Migrations/V027__add_showcase_fields.sql
new file mode 100644
index 0000000..d49d618
--- /dev/null
+++ b/src/GmRelay.Bot/Migrations/V027__add_showcase_fields.sql
@@ -0,0 +1,14 @@
+-- Showcase fields for game catalog / public session browsing.
+
+ALTER TABLE sessions
+    ADD COLUMN is_one_shot BOOLEAN NOT NULL DEFAULT false,
+    ADD COLUMN system VARCHAR(50),
+    ADD COLUMN description TEXT,
+    ADD COLUMN cover_image_url TEXT,
+    ADD COLUMN duration_minutes INTEGER,
+    ADD COLUMN format VARCHAR(20) CHECK (format IN ('Online', 'Offline', 'Hybrid')),
+    ADD COLUMN allow_direct_registration BOOLEAN NOT NULL DEFAULT false;
+
+CREATE INDEX ix_sessions_showcase
+    ON sessions (scheduled_at, system, is_one_shot, format)
+    WHERE is_public = true AND status <> 'Cancelled';