diff --git a/db/migrations/004_quotejudge_current_contract.sql b/db/migrations/004_quotejudge_current_contract.sql
new file mode 100644
index 0000000..5a17994
--- /dev/null
+++ b/db/migrations/004_quotejudge_current_contract.sql
@@ -0,0 +1,24 @@
+-- Current QuoteJudge Studio contract. Additive only: supports fresh installs and
+-- databases that previously applied older QuoteJudge migrations.
+ALTER TABLE quote_comparisons
+    ADD COLUMN IF NOT EXISTS recommendation_vendor TEXT,
+    ADD COLUMN IF NOT EXISTS result JSONB;
+
+UPDATE quote_comparisons
+SET recommendation_vendor = COALESCE(recommendation_vendor, recommended_vendor),
+    result = COALESCE(result, payload)
+WHERE recommendation_vendor IS NULL OR result IS NULL;
+
+CREATE TABLE IF NOT EXISTS quote_judge_receipts (
+    receipt_id TEXT PRIMARY KEY,
+    tenant_key TEXT NOT NULL,
+    comparison_id TEXT NOT NULL,
+    tool_name TEXT NOT NULL,
+    status TEXT NOT NULL,
+    input_hash TEXT NOT NULL,
+    payload JSONB NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS quote_judge_receipts_tenant_comparison_idx
+    ON quote_judge_receipts (tenant_key, comparison_id, created_at DESC);