diff --git a/scripts/deploy-preflight.ts b/scripts/deploy-preflight.ts
index 3e190e9..ad93ade 100644
--- a/scripts/deploy-preflight.ts
+++ b/scripts/deploy-preflight.ts
@@ -107,6 +107,39 @@ try {
 	}
 	if (schema.app_has_ddl)
 		throw new Error('DB_URL must use the app role (personal_app), not the schema owner');
+	// Private health schema: the app role reads and writes it, nobody else (not even personal_ro).
+	const [health] = await client`
+		select
+			count(*) filter (where has_table_privilege(c.oid, 'select, insert, update, delete')) as app_rw,
+			count(*) filter (
+				where exists (
+					select 1 from aclexplode(c.relacl) a join pg_roles r on r.oid = a.grantee
+					where r.rolname = 'personal_ro'
+				)
+			) as ro_read,
+			count(*) as tables,
+			has_schema_privilege('public', 'health', 'usage') as public_usage
+		from pg_class c join pg_namespace n on n.oid = c.relnamespace
+		where n.nspname = 'health' and c.relkind = 'r'
+	`;
+	if (
+		Number(health.tables) !== 7 ||
+		Number(health.app_rw) !== 7 ||
+		Number(health.ro_read) !== 0 ||
+		health.public_usage
+	)
+		throw new Error(`health schema grants are wrong: ${JSON.stringify(health)}`);
+	// Energy tracker reads the ned-collector tables (SELECT only).
+	const [energy] = await client`
+		select count(*) as hours, max(valid_from) as latest from energy.ned_utilization
+		where granularity = 'Hour' and classification = 'Current'
+		  and valid_from > now() - interval '7 days'
+	`;
+	if (!Number(energy.hours))
+		console.warn('Warning: energy.ned_utilization has no hourly data from the last 7 days');
+	console.log(
+		`health: ${health.tables} tables, app read/write, personal_ro none; energy: ${energy.hours} hourly rows, latest ${energy.latest ? new Date(energy.latest).toISOString() : 'none'}`
+	);
 	const [catalog] = await client`
 		select
 			(select count(*) from ref.pokemon) as pokemon,