diff --git a/sim/cluster0/lab-seeds/backend/sql/migrations/080_sfu_rooms.sql b/sim/cluster0/lab-seeds/backend/sql/migrations/080_sfu_rooms.sql
new file mode 100644
index 0000000..ac19b1c
--- /dev/null
+++ b/sim/cluster0/lab-seeds/backend/sql/migrations/080_sfu_rooms.sql
@@ -0,0 +1,38 @@
+-- SFU room management schema — MariaDB / SQLite default
+-- Created: 2026-06-28
+
+CREATE TABLE IF NOT EXISTS sfu_rooms (
+    id              BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    janus_room_id   INT             NOT NULL UNIQUE,
+    owner_id        BIGINT UNSIGNED NOT NULL,
+    name            VARCHAR(128)    NOT NULL DEFAULT '',
+    purpose         VARCHAR(32)     NOT NULL DEFAULT 'screen_cast',
+    created_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at      DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    closed_at       DATETIME        NULL,
+    INDEX idx_sfu_rooms_owner   (owner_id),
+    INDEX idx_sfu_rooms_closed  (closed_at)
+);
+
+CREATE TABLE IF NOT EXISTS sfu_participants (
+    id               BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    room_id          BIGINT UNSIGNED NOT NULL,
+    user_id          BIGINT UNSIGNED NOT NULL,
+    janus_handle_id  BIGINT UNSIGNED NOT NULL,
+    role             VARCHAR(16)     NOT NULL DEFAULT 'publisher',
+    joined_at        DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    left_at          DATETIME        NULL,
+    INDEX idx_sfup_room   (room_id),
+    INDEX idx_sfup_user   (user_id),
+    INDEX idx_sfup_joined (joined_at)
+);
+
+CREATE TABLE IF NOT EXISTS sfu_stats (
+    id               BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    participant_id   BIGINT UNSIGNED NOT NULL,
+    bitrate_kbps     DECIMAL(10,2)   NOT NULL DEFAULT 0,
+    packet_loss      DECIMAL(5,2)    NOT NULL DEFAULT 0,
+    sampled_at       DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    INDEX idx_sfustat_participant (participant_id),
+    INDEX idx_sfustat_time        (sampled_at)
+);
diff --git a/sim/cluster0/scripts/load-schemas.sh b/sim/cluster0/scripts/load-schemas.sh
index d6a91e2..dce1963 100644
--- a/sim/cluster0/scripts/load-schemas.sh
+++ b/sim/cluster0/scripts/load-schemas.sh
@@ -1,7 +1,18 @@
 #!/bin/sh
 # Load project schemas on cast01 primary only.
 set -eu
-SHARED=/shared/cluster/sql
+# Lab-seeds SQL is under lab-seeds/backend/sql; fall back to legacy sql/ layout.
+if [ -f /shared/cluster/lab-seeds/backend/sql/schema.mariadb.sql ]; then
+  SQL_BASE=/shared/cluster/lab-seeds/backend/sql
+  SQL_CRASHES="$SQL_BASE"
+  SQL_CRASHES_MIGRATIONS="$SQL_BASE/migrations"
+  SQL_URL_SHORTENER="$SQL_BASE"
+else
+  SQL_BASE=/shared/cluster/sql
+  SQL_CRASHES="$SQL_BASE/crashes"
+  SQL_CRASHES_MIGRATIONS="$SQL_BASE/crashes/migrations"
+  SQL_URL_SHORTENER="$SQL_BASE/url_shortener"
+fi
 [ "$(hostname -s)" = cast01 ] || { echo "run on cast01 only"; exit 1; }
 
 apply() {
@@ -14,11 +25,12 @@ apply() {
 apply_db() {
   db="$1"
   f="$2"
+  [ -f "$f" ] || { echo "skip (missing): $f"; return 0; }
   echo "==> $db < $f"
   mariadb -u root "$db" < "$f"
 }
 
-apply "$SHARED/crashes/schema.mariadb.sql"
+apply "$SQL_CRASHES/schema.mariadb.sql"
 
 # Migrations after base schema (003 is for legacy; base schema already includes tickets)
 for m in \
@@ -30,10 +42,16 @@ for m in \
   008_auth_email_2fa.sql \
   009_rssh_sessions.sql
 do
-  apply_db androidcast_crashes "$SHARED/crashes/migrations/$m"
+  apply_db androidcast_crashes "$SQL_CRASHES_MIGRATIONS/$m"
 done
 
-apply "$SHARED/url_shortener/schema.mariadb.sql"
+# Apply SFU rooms schema if present
+apply_db androidcast_crashes "$SQL_CRASHES_MIGRATIONS/080_sfu_rooms.sql" 2>/dev/null || true
+
+if [ -f "$SQL_URL_SHORTENER/schema.mariadb.sql" ] && \
+   [ "$SQL_URL_SHORTENER/schema.mariadb.sql" != "$SQL_CRASHES/schema.mariadb.sql" ]; then
+  apply "$SQL_URL_SHORTENER/schema.mariadb.sql"
+fi
 
 mariadb -u root -e "SHOW DATABASES; SELECT COUNT(*) AS crash_tables FROM information_schema.tables WHERE table_schema='androidcast_crashes'; SELECT COUNT(*) AS url_tables FROM information_schema.tables WHERE table_schema='url_shortener';"
 echo "schemas_loaded_ok"