diff --git a/frontend/tests/skill-registry-database.test.ts b/frontend/tests/skill-registry-database.test.ts
index 49f5fea1..fb9f0999 100644
--- a/frontend/tests/skill-registry-database.test.ts
+++ b/frontend/tests/skill-registry-database.test.ts
@@ -40,6 +40,10 @@ const ids = {
   cascadeCase: "11111111-1111-4111-8111-111111111113",
   cascadeTurn: "33333333-3333-4333-8333-333333333335",
   cascadeRequest: "44444444-4444-4444-8444-444444444445",
+  caseDeleteSession: "22222222-2222-4222-8222-222222222225",
+  caseDeleteCase: "11111111-1111-4111-8111-111111111114",
+  caseDeleteTurn: "33333333-3333-4333-8333-333333333336",
+  caseDeleteRequest: "44444444-4444-4444-8444-444444444446",
 };
 const oldHash = "a".repeat(64);
 const newHash = "b".repeat(64);
@@ -487,6 +491,10 @@ test("immutable Skill migration enforces RPC-only identity, legacy adoption, and
       `delete from public.agentic_rectification_skill_run_receipts where case_id = ${sqlLiteral(openedCaseId)};`,
       /agentic_rectification_skill_receipts_are_append_only/,
     );
+    expectOwnerError(
+      `delete from public.agentic_rectification_skill_upgrade_receipts where case_id = ${sqlLiteral(ids.legacyCase)};`,
+      /agentic_rectification_skill_receipts_are_append_only/,
+    );
     expectOwnerError(
       `truncate table public.agentic_rectification_skill_upgrade_receipts;`,
       /agentic_rectification_skill_receipts_are_append_only/,
@@ -495,6 +503,34 @@ test("immutable Skill migration enforces RPC-only identity, legacy adoption, and
       `truncate table public.agentic_rectification_skill_run_receipts;`,
       /agentic_rectification_skill_receipts_are_append_only/,
     );
+    expectOwnerError(
+      `truncate table public.agentic_rectification_cases cascade;`,
+      /agentic_rectification_skill_receipts_are_append_only/,
+    );
+
+    insertSession(ids.caseDeleteSession, ids.user);
+    insertCase({
+      id: ids.caseDeleteCase,
+      userId: ids.user,
+      sessionId: ids.caseDeleteSession,
+      hash: oldHash,
+    });
+    fixture.psql(`insert into public.agentic_rectification_turns (id, case_id, user_message, status, model_name)
+      values (${sqlLiteral(ids.caseDeleteTurn)}, ${sqlLiteral(ids.caseDeleteCase)}, 'case cascade user', 'pending', 'fixture-model');`);
+    serviceSql(`select public.insert_agentic_rectification_skill_run_receipt(
+      ${sqlLiteral(ids.user)}::uuid, ${sqlLiteral(ids.caseDeleteCase)}::uuid,
+      ${sqlLiteral(ids.caseDeleteTurn)}::uuid, ${sqlLiteral(ids.caseDeleteRequest)}::uuid,
+      'turn', 'jyotish-birth-time-rectification', '9.0.0', ${sqlLiteral(oldHash)}, ${sqlLiteral(sourceCommit)}
+    );`);
+    fixture.psql(`delete from public.agentic_rectification_cases where id = ${sqlLiteral(ids.caseDeleteCase)};`);
+    assert.equal(
+      fixture.psql(`select concat_ws(':',
+        (select count(*) from public.agentic_rectification_cases where id = ${sqlLiteral(ids.caseDeleteCase)}),
+        (select count(*) from public.agentic_rectification_turns where id = ${sqlLiteral(ids.caseDeleteTurn)}),
+        (select count(*) from public.agentic_rectification_skill_run_receipts where case_id = ${sqlLiteral(ids.caseDeleteCase)})
+      )`),
+      '0:0:0',
+    );
 
     fixture.psql(`delete from public.agentic_rectification_turns where id = ${sqlLiteral(ids.verifiedTurn)};`);
     assert.equal(