src/features/housekeeping/foundation/commands/audit-envelope.test.ts

@@ -129,4 +129,16 @@ describe("audit command envelope", () => {
 			auditOutcomeError: auditFailure,
 		});
 	});
+	it("preserves a frozen operation error when failure evidence rejects", async () => {
+		const original = Object.freeze(new Error("operation failed"));
+		const writer: HousekeepingAuditWriter = {
+			write: vi
+				.fn()
+				.mockResolvedValueOnce(undefined)
+				.mockRejectedValueOnce(new Error("audit failure")),
+		};
+		await expect(
+			runWithAuditIntent(writer, auditEntry, () => Promise.reject(original)),
+		).rejects.toBe(original);
+	});
 });

src/features/housekeeping/foundation/commands/audit-envelope.ts

@@ -50,10 +50,14 @@ export async function runWithAuditIntent<T>(
 			await writeOutcome(writer, entry, "failure", transaction);
 		} catch (auditOutcomeError) {
 			if (error instanceof Error) {
-				Object.defineProperty(error, "auditOutcomeError", {
-					value: auditOutcomeError,
-					configurable: true,
-				});
+				try {
+					Object.defineProperty(error, "auditOutcomeError", {
+						value: auditOutcomeError,
+						configurable: true,
+					});
+				} catch {
+					// Frozen or non-extensible errors still preserve their original identity.
+				}
 			}
 		}
 		throw error;