diff --git a/deploy/postgres/goose/00046_2026-09-16-retire-demo-ten-projects.sql b/deploy/postgres/goose/00046_2026-09-16-retire-demo-ten-projects.sql
new file mode 100644
index 00000000..b1914804
--- /dev/null
+++ b/deploy/postgres/goose/00046_2026-09-16-retire-demo-ten-projects.sql
@@ -0,0 +1,23 @@
+-- +goose Up
+-- Retire goose-seeded demo projects (6001–6010) so they no longer appear in default lists.
+-- Data is retained for audit; status flips to demo_retired (reversible with UPDATE).
+BEGIN;
+
+UPDATE projects
+SET status = 'demo_retired',
+    updated_at = now()
+WHERE id BETWEEN 6001 AND 6010
+  AND status <> 'demo_retired';
+
+COMMIT;
+
+-- +goose Down
+BEGIN;
+
+UPDATE projects
+SET status = 'active',
+    updated_at = now()
+WHERE id BETWEEN 6001 AND 6010
+  AND status = 'demo_retired';
+
+COMMIT;
diff --git a/deploy/postgres/migrations/2026-09-16-retire-demo-ten-projects.sql b/deploy/postgres/migrations/2026-09-16-retire-demo-ten-projects.sql
new file mode 100644
index 00000000..b1914804
--- /dev/null
+++ b/deploy/postgres/migrations/2026-09-16-retire-demo-ten-projects.sql
@@ -0,0 +1,23 @@
+-- +goose Up
+-- Retire goose-seeded demo projects (6001–6010) so they no longer appear in default lists.
+-- Data is retained for audit; status flips to demo_retired (reversible with UPDATE).
+BEGIN;
+
+UPDATE projects
+SET status = 'demo_retired',
+    updated_at = now()
+WHERE id BETWEEN 6001 AND 6010
+  AND status <> 'demo_retired';
+
+COMMIT;
+
+-- +goose Down
+BEGIN;
+
+UPDATE projects
+SET status = 'active',
+    updated_at = now()
+WHERE id BETWEEN 6001 AND 6010
+  AND status = 'demo_retired';
+
+COMMIT;
diff --git a/internal/projectworkflow/store.go b/internal/projectworkflow/store.go
index 41aee3a2..81f6731f 100644
--- a/internal/projectworkflow/store.go
+++ b/internal/projectworkflow/store.go
@@ -155,7 +155,8 @@ func (s *pgStore) ListProjectsForUser(ctx context.Context, userID int64) ([]*Pro
 		       p.active_workflow_changed_at, p.active_workflow_changed_by, p.created_at, p.updated_at
 		FROM projects p
 		LEFT JOIN project_members pm ON pm.project_id = p.id AND pm.user_id = $1 AND pm.status = 'active'
-		WHERE p.creator_user_id = $1 OR pm.user_id IS NOT NULL
+		WHERE (p.creator_user_id = $1 OR pm.user_id IS NOT NULL)
+		  AND COALESCE(p.status, 'active') <> 'demo_retired'
 		ORDER BY p.id DESC
 	`
 	rows, err := s.pool.Query(ctx, query, userID)
@@ -188,6 +189,7 @@ func (s *pgStore) ListAllProjects(ctx context.Context) ([]*Project, error) {
 		       COALESCE(p.workflow_selection_version, 1), COALESCE(p.workflow_plan_revision, 0),
 		       p.active_workflow_changed_at, p.active_workflow_changed_by, p.created_at, p.updated_at
 		FROM projects p
+		WHERE COALESCE(p.status, 'active') <> 'demo_retired'
 		ORDER BY p.id DESC
 	`
 	rows, err := s.pool.Query(ctx, query)