fix(housekeeping): harden command dispatch boundaries

src/features/housekeeping/foundation/commands/registry.test.ts

@@ -123,6 +123,37 @@ describe("housekeeping command registry", () => {
 		expect(() => registerHousekeepingCommand(invalid)).toThrow();
 	});
 
+	it("keeps registered validation unchanged after original shape and child mutation", () => {
+		const child = z.string().min(3);
+		const input = z.object({ value: child, guard: child });
+		registerHousekeepingCommand({
+			...command("people.registry.deep-validation"),
+			input,
+			execute: async (context, value) =>
+				ok({ id: value.value.length }, context.correlationId),
+		} as HousekeepingCommand<{ value: string; guard: string }, { id: number }>);
+		const registered = getHousekeepingCommand(
+			"people.registry.deep-validation",
+		);
+		if (!registered) throw new Error("registered command missing");
+
+		(input.def as { shape: { value: z.ZodType } }).shape.value = z.number();
+		const minCheck = (child.def as { checks: unknown[] }).checks[0] as {
+			_zod: { def: { minimum: number } };
+		};
+		minCheck._zod.def.minimum = 0;
+
+		expect(input.safeParse({ value: 4, guard: "a" }).success).toBe(true);
+		expect(
+			registered.input.safeParse({ value: "abcd", guard: "ab" }).success,
+		).toBe(false);
+		expect(
+			registered.input.safeParse({ value: "abcd", guard: "abcd" }).success,
+		).toBe(true);
+		expect(
+			registered.input.safeParse({ value: 4, guard: "abcd" }).success,
+		).toBe(false);
+	});
 	it("seals the global registry after deterministic bootstrap", () => {
 		sealHousekeepingCommandRegistry();