diff --git a/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.test.ts b/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.test.ts
index cc6a0d96b599..fe8eeb629d9c 100644
--- a/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.test.ts
+++ b/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.test.ts
@@ -253,6 +253,22 @@ describe("Slack live QA runtime helpers", () => {
     );
   });
 
+  it("preserves sanitized gateway debug artifacts on scenario failure", async () => {
+    const cleanupIssues: string[] = [];
+    const stop = vi.fn(async () => {});
+
+    await testing.preserveSlackGatewayDebugArtifacts({
+      cleanupIssues,
+      gatewayDebugDirPath: ".artifacts/qa-e2e/slack-live-test/gateway-debug",
+      gatewayHarness: { stop } as never,
+    });
+
+    expect(stop).toHaveBeenCalledWith({
+      preserveToDir: ".artifacts/qa-e2e/slack-live-test/gateway-debug",
+    });
+    expect(cleanupIssues).toEqual([]);
+  });
+
   it("redacts approval artifact content and Slack metadata in summary-shaped results", () => {
     expect(
       testing.toSlackQaScenarioArtifactResults({
diff --git a/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.ts b/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.ts
index 1fed9ddb4b37..befa8065bbbc 100644
--- a/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.ts
+++ b/extensions/qa-lab/src/live-transports/slack/slack-live.runtime.ts
@@ -119,6 +119,8 @@ type SlackQaScenarioDefinition = LiveTransportScenarioDefinition<SlackQaScenario
   configOverrides?: SlackQaConfigOverrides;
 };
 
+type SlackQaGatewayHarness = Awaited<ReturnType<typeof startQaLiveLaneGateway>>;
+
 type SlackAuthIdentity = {
   botId?: string;
   teamId?: string;
@@ -1718,6 +1720,16 @@ function renderSlackQaMarkdown(params: {
   return lines.join("\n");
 }
 
+async function preserveSlackGatewayDebugArtifacts(params: {
+  cleanupIssues: string[];
+  gatewayDebugDirPath: string;
+  gatewayHarness: SlackQaGatewayHarness;
+}) {
+  await params.gatewayHarness.stop({ preserveToDir: params.gatewayDebugDirPath }).catch((error) => {
+    appendLiveLaneIssue(params.cleanupIssues, "gateway debug preservation failed", error);
+  });
+}
+
 export async function runSlackQaLive(params: {
   alternateModel?: string;
   credentialRole?: string;
@@ -1789,7 +1801,7 @@ export async function runSlackQaLive(params: {
     for (const scenario of scenarios) {
       let scenarioAttempt = 1;
       while (true) {
-        let gatewayHarness: Awaited<ReturnType<typeof startQaLiveLaneGateway>> | undefined;
+        let gatewayHarness: SlackQaGatewayHarness | undefined;
         try {
           assertLeaseHealthy();
           gatewayHarness = await startQaLiveLaneGateway({
@@ -1971,11 +1983,11 @@ export async function runSlackQaLive(params: {
           });
           preservedGatewayDebugArtifacts = true;
           if (gatewayHarness) {
-            await gatewayHarness
-              .stop({ keepTemp: true, preserveToDir: gatewayDebugDirPath })
-              .catch((stopError) => {
-                appendLiveLaneIssue(cleanupIssues, "gateway debug preservation failed", stopError);
-              });
+            await preserveSlackGatewayDebugArtifacts({
+              cleanupIssues,
+              gatewayDebugDirPath,
+              gatewayHarness,
+            });
           }
           break;
         } finally {
@@ -2114,6 +2126,7 @@ export const testing = {
   findScenario,
   isSlackChannelReadyForQa,
   parseSlackQaCredentialPayload,
+  preserveSlackGatewayDebugArtifacts,
   resolveSlackChannelReadySince,
   resolveSlackApprovalCheckpointConfig,
   resolveApprovalDecision,