fix(health): redact failure diagnostics

src/commands/health-format.ts

@@ -6,6 +6,7 @@ import { colorize, isRich, theme } from "../../packages/terminal-core/src/theme.
 import { formatChannelStatusState } from "../channels/plugins/status-state.js";
 import { isGatewayTransportError } from "../gateway/call.js";
 import type { ChannelAccountHealthSummary, HealthSummary } from "../gateway/health/types.js";
+import { redactSensitiveText } from "../logging/redact.js";
 
 export function formatGatewayClosedDiagnostic(err: unknown): string | undefined {
   if (!isGatewayTransportError(err) || err.kind !== "closed" || err.code === undefined) {
@@ -35,8 +36,8 @@ const formatKv = (line: string, rich: boolean) => {
 /** Formats thrown health errors with rich detail lines when terminal color is enabled. */
 export function formatHealthCheckFailure(err: unknown, opts: { rich?: boolean } = {}): string {
   const rich = opts.rich ?? isRich();
-  const raw = String(err);
-  const message = err instanceof Error ? err.message : raw;
+  const raw = redactSensitiveText(String(err));
+  const message = err instanceof Error ? redactSensitiveText(err.message) : raw;
 
   if (!rich) {
     return `Health check failed: ${raw}`;

src/commands/health.test.ts

@@ -1,7 +1,9 @@
 // Health command tests cover gateway health probes, JSON output, and status formatting.
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { GatewayClientRequestError } from "../../packages/gateway-client/src/index.js";
 import { stripAnsi } from "../../packages/terminal-core/src/ansi.js";
+import { registerSecretValueForRedaction } from "../logging/secret-redaction-registry.js";
+import { resetSecretRedactionRegistryForTest } from "../logging/secret-redaction-registry.test-support.js";
 import { ExitError } from "../runtime.js";
 import {
   buildCredentialsRequiredHealthDiagnostic,
@@ -26,6 +28,10 @@ const runtime = {
   exit: vi.fn(),
 };
 
+afterEach(() => {
+  resetSecretRedactionRegistryForTest();
+});
+
 const defaultSessions: HealthSummary["sessions"] = {
   path: "/tmp/sessions.json",
   count: 0,
@@ -908,6 +914,18 @@ describe("formatConfigReloadHealthLine", () => {
 });
 
 describe("formatHealthCheckFailure", () => {
+  it.each([false, true])("redacts registered secrets from rich=%s output", (rich) => {
+    const registeredSecret = "qa-health-check-secret";
+    registerSecretValueForRedaction(registeredSecret);
+
+    const output = formatHealthCheckFailure(new Error(`gateway failed with ${registeredSecret}`), {
+      rich,
+    });
+
+    expect(output).toContain("gateway failed with");
+    expect(output).not.toContain(registeredSecret);
+  });
+
   it("keeps non-rich output stable", () => {
     const err = new Error("gateway closed (1006 abnormal closure): no close reason");
     expect(formatHealthCheckFailure(err, { rich: false })).toBe(