diff --git a/extensions/qa-lab/src/scenario-catalog.test.ts b/extensions/qa-lab/src/scenario-catalog.test.ts
index 914b9369be94..c1f2d4995f59 100644
--- a/extensions/qa-lab/src/scenario-catalog.test.ts
+++ b/extensions/qa-lab/src/scenario-catalog.test.ts
@@ -192,6 +192,22 @@ describe("qa scenario catalog", () => {
     expect(cronAuthorityFlow).not.toContain("waitForCronRunCompletion");
   });
 
+  it("keeps the audited parallel script allowlist exact", () => {
+    const expected =
+      "active-talk-agent-run-status agent-run-identity-inspection cached-health-snapshot-boundaries channel-health-monitor-lifecycle diagnostic-events-boundary gateway-loopback-lan-access gateway-rpc-account-health gateway-smoke gateway-ssh-tunnels gateway-stability-runtime gateway-support-export gateway-tls-pinning gateway-websocket-protocol-contracts logging-file-boundary mcp-gateway-connect-startup-retry mcp-plugin-tools-call otel-generation-config-watcher qa-otel-smoke remote-log-tailing tui-command-surfaces-pty tui-editor-input-pty tui-entrypoints-pty tui-gateway-boundary-pty tui-local-runtime-recovery-pty tui-local-shell-pty tui-pty-evidence-producer-contract tui-session-management-pty tui-streaming-tool-cards-pty tui-terminal-safety-pty voice-call-cli-rpc-agent-tool webchat-auto-tts".split(
+        " ",
+      );
+    const marked = readQaScenarioPack().scenarios.filter(
+      (scenario) =>
+        scenario.execution.kind === "script" && scenario.execution.parallelSafe === true,
+    );
+
+    expect(marked.map((scenario) => scenario.id).toSorted()).toEqual(expected);
+    const ssh = readQaScenarioById("gateway-ssh-tunnels");
+    expect(ssh.execution).toMatchObject({ kind: "script", parallelSafe: true });
+    expect(ssh.execution).not.toHaveProperty("allowBlockedEvidence");
+  });
+
   it("rejects invalid provider metadata at the catalog boundary", () => {
     const scenario = structuredClone(
       requireFlowScenario(readQaScenarioById("subagent-completion-direct-fallback")),
diff --git a/extensions/qa-lab/src/scenario-catalog.ts b/extensions/qa-lab/src/scenario-catalog.ts
index 24da9eb0e74b..e25f0081c9fb 100644
--- a/extensions/qa-lab/src/scenario-catalog.ts
+++ b/extensions/qa-lab/src/scenario-catalog.ts
@@ -111,6 +111,7 @@ const qaTestFileScenarioExecutionSchema = z.discriminatedUnion("kind", [
     kind: z.literal("script"),
     allowBlockedEvidence: z.boolean().optional(),
     args: z.array(z.string()).optional(),
+    parallelSafe: z.boolean().optional(),
     timeoutMs: z.number().int().positive().optional(),
   }),
 ]);
diff --git a/extensions/qa-lab/src/suite-launch.runtime.test.ts b/extensions/qa-lab/src/suite-launch.runtime.test.ts
index f8fd5ff36aaa..880968c9761f 100644
--- a/extensions/qa-lab/src/suite-launch.runtime.test.ts
+++ b/extensions/qa-lab/src/suite-launch.runtime.test.ts
@@ -57,6 +57,14 @@ async function writeEvidence(pathLocal: string, writeFile = true) {
   return evidence;
 }
 
+function createDeferred() {
+  let resolve!: () => void;
+  const promise = new Promise<void>((done) => {
+    resolve = done;
+  });
+  return { promise, resolve };
+}
+
 function trackMaxActiveFlowRuns() {
   const run = runQaFlowSuite.getMockImplementation();
   if (!run) {
@@ -1966,6 +1974,213 @@ describe("qa suite runtime launcher", () => {
     );
   });
 
+  it("settles flow and native work, then runs serial scripts before a bounded parallel tail", async () => {
+    const repoRoot = await makeTempRepo("qa-suite-parallel-scripts-");
+    const defaultFlowImplementation = runQaFlowSuite.getMockImplementation();
+    const defaultTestFileImplementation = runQaTestFileScenarios.getMockImplementation();
+    if (!defaultFlowImplementation || !defaultTestFileImplementation) {
+      throw new Error("expected default QA suite mock implementations");
+    }
+    const flow = createDeferred();
+    const native = createDeferred();
+    const serial = createDeferred();
+    const parallel = createDeferred();
+    const started: string[] = [];
+    const parallelScriptIds: string[] = [];
+    let activeParallelScripts = 0;
+    let maxActiveParallelScripts = 0;
+    runQaFlowSuite.mockImplementationOnce(async (params) => {
+      started.push("flow");
+      await flow.promise;
+      return await defaultFlowImplementation(params);
+    });
+    runQaTestFileScenarios.mockImplementation(async (params) => {
+      const scenarioIds = params.scenarios.map((scenario: QaTestFileScenario) => scenario.id);
+      const kind = params.scenarios[0]?.execution.kind;
+      if (kind === "playwright") {
+        started.push("native");
+        await native.promise;
+      } else if (scenarioIds.includes("docker-npm-onboard-channel-agent")) {
+        started.push("serial");
+        await serial.promise;
+      } else {
+        parallelScriptIds.push(...scenarioIds);
+        activeParallelScripts += 1;
+        maxActiveParallelScripts = Math.max(maxActiveParallelScripts, activeParallelScripts);
+        try {
+          await parallel.promise;
+        } finally {
+          activeParallelScripts -= 1;
+        }
+      }
+      return await defaultTestFileImplementation(params);
+    });
+
+    const runPromise = runQaSuite({
+      repoRoot,
+      outputDir: ".artifacts/qa-e2e/parallel-scripts",
+      concurrency: 8,
+      scenarioIds: [
+        "dm-chat-baseline",
+        "control-ui-chat-flow-playwright",
+        "docker-npm-onboard-channel-agent",
+        "remote-log-tailing",
+        "gateway-smoke",
+        "logging-file-boundary",
+        "diagnostic-events-boundary",
+      ],
+    });
+    await vi.waitFor(() => expect(started).toEqual(["flow", "native"]));
+
+    flow.resolve();
+    await Promise.resolve();
+    expect(started).toEqual(["flow", "native"]);
+
+    native.resolve();
+    await vi.waitFor(() => expect(started).toContain("serial"));
+    expect(parallelScriptIds).toEqual([]);
+
+    serial.resolve();
+    await vi.waitFor(() => expect(parallelScriptIds).toHaveLength(3));
+    expect(maxActiveParallelScripts).toBe(3);
+    expect(parallelScriptIds).not.toContain("diagnostic-events-boundary");
+
+    parallel.resolve();
+    await runPromise;
+    expect(parallelScriptIds.slice(0, 3)).toEqual(
+      expect.arrayContaining(["remote-log-tailing", "gateway-smoke", "logging-file-boundary"]),
+    );
+    expect(parallelScriptIds[3]).toBe("diagnostic-events-boundary");
+    expect(maxActiveParallelScripts).toBe(3);
+  });
+
+  it("keeps selected evidence order and successful siblings when a parallel script rejects", async () => {
+    const repoRoot = await makeTempRepo("qa-suite-parallel-script-rejection-");
+    const defaultTestFileImplementation = runQaTestFileScenarios.getMockImplementation();
+    if (!defaultTestFileImplementation) {
+      throw new Error("expected default QA test-file mock implementation");
+    }
+    const first = createDeferred();
+    runQaTestFileScenarios.mockImplementation(async (params) => {
+      const scenario = params.scenarios[0] as QaTestFileScenario | undefined;
+      if (!scenario) {
+        throw new Error("expected one script scenario");
+      }
+      if (scenario.id === "gateway-smoke") {
+        throw new Error("audited producer rejected");
+      }
+      if (scenario.id === "remote-log-tailing") {
+        await first.promise;
+      }
+      const result = await defaultTestFileImplementation(params);
+      return {
+        ...result,
+        evidence: {
+          ...result.evidence,
+          entries: [
+            {
+              test: { kind: "qa-scenario", id: scenario.id, title: scenario.title },
+              coverage: [],
+              result: { status: "pass" as const },
+            },
+          ],
+        },
+      };
+    });
+
+    const runPromise = runQaSuite({
+      repoRoot,
+      outputDir: ".artifacts/qa-e2e/parallel-script-rejection",
+      concurrency: 3,
+      scenarioIds: ["remote-log-tailing", "gateway-smoke", "logging-file-boundary"],
+    });
+    await vi.waitFor(() => expect(runQaTestFileScenarios).toHaveBeenCalledTimes(3));
+    first.resolve();
+    const result = await runPromise;
+
+    expect(result.executionKind).toBe("suite");
+    if (result.executionKind !== "suite") {
+      throw new Error("expected unified suite result");
+    }
+    const evidence = JSON.parse(await fs.readFile(result.result.evidencePath, "utf8")) as {
+      entries: Array<{
+        result: { failure?: { reason?: string }; status: string };
+        test: { id: string };
+      }>;
+    };
+    expect(evidence.entries.map((entry) => entry.test.id)).toEqual([
+      "remote-log-tailing",
+      "gateway-smoke",
+      "logging-file-boundary",
+    ]);
+    expect(evidence.entries[1]).toMatchObject({
+      result: {
+        failure: { reason: "suite partition failed: audited producer rejected" },
+        status: "fail",
+      },
+    });
+  });
+
+  it("serializes every fail-fast script and stops before post-failure work", async () => {
+    const repoRoot = await makeTempRepo("qa-suite-fail-fast-scripts-");
+    const defaultTestFileImplementation = runQaTestFileScenarios.getMockImplementation();
+    if (!defaultTestFileImplementation) {
+      throw new Error("expected default QA test-file mock implementation");
+    }
+    const first = createDeferred();
+    const started: string[] = [];
+    let active = 0;
+    let maxActive = 0;
+    runQaTestFileScenarios.mockImplementation(async (params) => {
+      const scenario = params.scenarios[0] as QaTestFileScenario | undefined;
+      if (!scenario) {
+        throw new Error("expected one script scenario");
+      }
+      started.push(scenario.id);
+      active += 1;
+      maxActive = Math.max(maxActive, active);
+      try {
+        if (scenario.id === "remote-log-tailing") {
+          await first.promise;
+        }
+        const result = await defaultTestFileImplementation(params);
+        if (scenario.id !== "docker-npm-onboard-channel-agent") {
+          return result;
+        }
+        return {
+          ...result,
+          results: result.results.map((scenarioResult: QaTestFileScenarioRunResult) =>
+            Object.assign({}, scenarioResult, {
+              status: "fail" as const,
+              failureMessage: "serial owner failed",
+            }),
+          ),
+        };
+      } finally {
+        active -= 1;
+      }
+    });
+
+    const runPromise = runQaSuite({
+      repoRoot,
+      outputDir: ".artifacts/qa-e2e/fail-fast-scripts",
+      concurrency: 8,
+      failFast: true,
+      scenarioIds: ["remote-log-tailing", "docker-npm-onboard-channel-agent", "gateway-smoke"],
+    });
+    await vi.waitFor(() => expect(started).toEqual(["remote-log-tailing"]));
+    expect(maxActive).toBe(1);
+
+    first.resolve();
+    await runPromise;
+    expect(started).toEqual(["remote-log-tailing", "docker-npm-onboard-channel-agent"]);
+    expect(maxActive).toBe(1);
+    expect(runQaTestFileScenarios).toHaveBeenCalledTimes(2);
+    expect(runQaTestFileScenarios).toHaveBeenLastCalledWith(
+      expect.objectContaining({ failFast: true }),
+    );
+  });
+
   it("keeps multiple isolated flow scenarios in separate serial partitions", async () => {
     const repoRoot = await makeTempRepo("qa-suite-serial-isolated-");
     await runQaSuite({
diff --git a/extensions/qa-lab/src/suite-launch.runtime.ts b/extensions/qa-lab/src/suite-launch.runtime.ts
index f1be725cd3e0..1fa4d311f988 100644
--- a/extensions/qa-lab/src/suite-launch.runtime.ts
+++ b/extensions/qa-lab/src/suite-launch.runtime.ts
@@ -92,6 +92,9 @@ type QaSuiteExecutionPlan = {
 
 const MAX_SHARED_FLOW_PARTITIONS = 4;
 const MAX_ISOLATED_FLOW_CONCURRENCY = 8;
+// Three is the audited ceiling for concurrent Gateway and process-group lifecycles.
+// Raising it risks cleanup overlap and shared port/listener contention.
+const MAX_PARALLEL_SCRIPT_CONCURRENCY = 3;
 const ISOLATED_FLOW_WORKER_START_STAGGER_MS = 1_500;
 const QA_SUITE_INFRA_RETRY_LIMIT = 1;
 const QA_SUITE_INFRA_RETRY_NETWORK_ERROR_CODES = new Set([
@@ -807,7 +810,8 @@ async function runUnifiedQaSuite(params: {
   const sharedFlowPartitionTasks: QaUnifiedPartitionTask[] = [];
   const isolatedFlowPartitionTasks: QaUnifiedPartitionTask[] = [];
   const testFilePartitionTasks: QaUnifiedPartitionTask[] = [];
-  const scriptPartitionTasks: QaUnifiedPartitionTask[] = [];
+  const serialScriptPartitionTasks: QaUnifiedPartitionTask[] = [];
+  const parallelScriptPartitionTasks: QaUnifiedPartitionTask[] = [];
   const unavailableChannelCredentialDetails = new Map<string, string>();
   if (params.plan.channelGroups.length > 0) {
     const channelGroups = params.plan.channelGroups;
@@ -1139,16 +1143,32 @@ async function runUnifiedQaSuite(params: {
       testFilePartitionTasks.push(createTestFilePartitionTask(concurrentTestFileScenariosByKind));
     }
   }
-  const scriptScenarios = params.plan.testFileScenariosByKind.get("script");
+  const scriptScenarios = params.plan.testFileScenariosByKind
+    .get("script")
+    ?.filter((scenario) => scenario.execution.kind === "script");
   if (scriptScenarios?.length) {
+    const isParallelSafeScript = (scenario: QaTestFileScenario) =>
+      scenario.execution.kind === "script" && scenario.execution.parallelSafe === true;
     if (failFast) {
       for (const scenario of scriptScenarios) {
-        scriptPartitionTasks.push(createTestFilePartitionTask(new Map([["script", [scenario]]])));
+        serialScriptPartitionTasks.push(
+          createTestFilePartitionTask(new Map([["script", [scenario]]])),
+        );
       }
     } else {
-      scriptPartitionTasks.push(
-        createTestFilePartitionTask(new Map([["script", scriptScenarios]])),
-      );
+      const serialScenarios = scriptScenarios.filter((scenario) => !isParallelSafeScript(scenario));
+      if (serialScenarios.length > 0) {
+        serialScriptPartitionTasks.push(
+          createTestFilePartitionTask(new Map([["script", serialScenarios]])),
+        );
+      }
+      for (const scenario of scriptScenarios) {
+        if (isParallelSafeScript(scenario)) {
+          parallelScriptPartitionTasks.push(
+            createTestFilePartitionTask(new Map([["script", [scenario]]])),
+          );
+        }
+      }
     }
   }
   const concurrentPartitionTasks = [
@@ -1299,13 +1319,24 @@ async function runUnifiedQaSuite(params: {
       : await runWeightedUnifiedPartitionTasks(retryingTasks, maxWeight);
   };
   const concurrentPartitionResults = await runPartitionTasks(concurrentPartitionTasks, concurrency);
-  // Script scenarios may rebuild the checkout's shared dist tree. Wait until every
-  // flow Gateway has stopped so package postbuild cannot invalidate its loaded chunks.
-  const scriptPartitionResults =
+  // Unmarked scripts may rebuild shared checkout state. Run them exclusively
+  // after every flow and native partition settles, then start only audited peers.
+  const serialScriptPartitionResults =
     failFast && concurrentPartitionResults.some(partitionFailed)
       ? []
-      : await runPartitionTasks(scriptPartitionTasks, 1);
-  const partitionResults = [...concurrentPartitionResults, ...scriptPartitionResults];
+      : await runPartitionTasks(serialScriptPartitionTasks, 1);
+  const parallelScriptPartitionResults =
+    failFast && serialScriptPartitionResults.some(partitionFailed)
+      ? []
+      : await runPartitionTasks(
+          parallelScriptPartitionTasks,
+          Math.min(concurrency, MAX_PARALLEL_SCRIPT_CONCURRENCY),
+        );
+  const partitionResults = [
+    ...concurrentPartitionResults,
+    ...serialScriptPartitionResults,
+    ...parallelScriptPartitionResults,
+  ];
   for (const partitionResult of partitionResults) {
     for (const scenarioResult of partitionResult.scenarioResults) {
       const results = scenarioResultsById.get(scenarioResult.scenarioId) ?? [];
@@ -1315,10 +1346,21 @@ async function runUnifiedQaSuite(params: {
     evidenceSummaries.push(...partitionResult.evidenceSummaries);
   }
   const finishedAt = new Date();
-  const evidence = mergeQaEvidenceSummaries({
+  const mergedEvidence = mergeQaEvidenceSummaries({
     evidenceSummaries,
     generatedAt: finishedAt.toISOString(),
   });
+  const scenarioOrder = new Map(
+    params.plan.scenarios.map((scenario, index) => [scenario.id, index]),
+  );
+  const evidence = {
+    ...mergedEvidence,
+    entries: mergedEvidence.entries.toSorted(
+      (left, right) =>
+        (scenarioOrder.get(left.test.id) ?? Number.MAX_SAFE_INTEGER) -
+        (scenarioOrder.get(right.test.id) ?? Number.MAX_SAFE_INTEGER),
+    ),
+  };
   const channel = summarizeQaEvidenceChannel([evidence]);
   const scenarios = params.plan.scenarios.flatMap((scenario) => {
     const results = scenarioResultsById.get(scenario.id);
diff --git a/qa/scenarios/cli/remote-log-tailing.yaml b/qa/scenarios/cli/remote-log-tailing.yaml
index 7d7276229595..73a680e4e9db 100644
--- a/qa/scenarios/cli/remote-log-tailing.yaml
+++ b/qa/scenarios/cli/remote-log-tailing.yaml
@@ -23,6 +23,7 @@ scenario:
     - test/e2e/qa-lab/runtime/remote-log-tailing-runtime.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/remote-log-tailing-runtime.ts
     summary: Starts an authenticated Gateway and exercises logs.tail through RPC and the packaged CLI.
     args:
diff --git a/qa/scenarios/index.yaml b/qa/scenarios/index.yaml
index a2be4f193409..b8efa6e37dfa 100644
--- a/qa/scenarios/index.yaml
+++ b/qa/scenarios/index.yaml
@@ -34,6 +34,9 @@ title: OpenClaw QA Scenario Pack
 # - use `scenario.execution.suiteIsolation: isolated` for flow scenarios that
 #   mutate gateway/runtime state in non-obvious ways; add `isolationReason`
 #   so reviewers know why the suite scheduler must not share the worker
+# - set `scenario.execution.parallelSafe: true` only for script producers that
+#   own their mutable state, ports, caches, processes, and credentials, and do
+#   not rebuild or mutate shared checkout output
 # - use `runtimePairLane` only for runtime-pair batch membership: `core`,
 #   `extended`, or `soak`; provider/model/auth/channel eligibility stays in
 #   independent execution constraints
diff --git a/qa/scenarios/media/webchat-auto-tts.yaml b/qa/scenarios/media/webchat-auto-tts.yaml
index e9cbb21c4f33..68c78064d4c1 100644
--- a/qa/scenarios/media/webchat-auto-tts.yaml
+++ b/qa/scenarios/media/webchat-auto-tts.yaml
@@ -26,6 +26,7 @@ scenario:
     - test/e2e/qa-lab/runtime/media-talk-gateway.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/media-talk-gateway.ts
     summary: Starts a real Gateway and mock model/TTS providers, sends a WebChat turn, and verifies the history attachment plus scoped media-ticket route.
     args:
diff --git a/qa/scenarios/observability/cached-health-snapshot-boundaries.yaml b/qa/scenarios/observability/cached-health-snapshot-boundaries.yaml
index f64211ed79bb..8dd790e5a586 100644
--- a/qa/scenarios/observability/cached-health-snapshot-boundaries.yaml
+++ b/qa/scenarios/observability/cached-health-snapshot-boundaries.yaml
@@ -25,6 +25,7 @@ scenario:
     - test/e2e/qa-lab/runtime/cached-health-snapshot-boundaries.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/cached-health-snapshot-boundaries.ts
     summary: Exercises the production health handler cache boundary and crosses a real authenticated Gateway plugin-tool invocation.
     args:
diff --git a/qa/scenarios/observability/channel-health-monitor-lifecycle.yaml b/qa/scenarios/observability/channel-health-monitor-lifecycle.yaml
index 4c8f853be7ee..a7fd025638bc 100644
--- a/qa/scenarios/observability/channel-health-monitor-lifecycle.yaml
+++ b/qa/scenarios/observability/channel-health-monitor-lifecycle.yaml
@@ -24,6 +24,7 @@ scenario:
     - test/e2e/qa-lab/runtime/channel-health-monitor-lifecycle-runtime.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/channel-health-monitor-lifecycle-runtime.ts
     summary: Runs the production channel health monitor with controlled real-time account snapshots and captures lifecycle operations and logs.
     args:
diff --git a/qa/scenarios/observability/gateway-rpc-account-health.yaml b/qa/scenarios/observability/gateway-rpc-account-health.yaml
index bef68aedd252..79d06faf9065 100644
--- a/qa/scenarios/observability/gateway-rpc-account-health.yaml
+++ b/qa/scenarios/observability/gateway-rpc-account-health.yaml
@@ -23,6 +23,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-rpc-account-health.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-rpc-account-health.ts
     summary: Starts a real QA bus and CLI Gateway child, performs authenticated health and status RPCs, and patches one account through config CAS and hot reload.
     args:
diff --git a/qa/scenarios/observability/gateway-stability-runtime.yaml b/qa/scenarios/observability/gateway-stability-runtime.yaml
index 8c0ba79ee6e5..c2fe94c675f0 100644
--- a/qa/scenarios/observability/gateway-stability-runtime.yaml
+++ b/qa/scenarios/observability/gateway-stability-runtime.yaml
@@ -29,6 +29,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-stability-runtime.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-stability-runtime.ts
     summary: Exercise live stability RPC, bounded retention, persisted bundle filtering, and support export through the real child CLI.
     args:
diff --git a/qa/scenarios/observability/gateway-support-export.yaml b/qa/scenarios/observability/gateway-support-export.yaml
index 5f66e2b511ee..161fc487aeb1 100644
--- a/qa/scenarios/observability/gateway-support-export.yaml
+++ b/qa/scenarios/observability/gateway-support-export.yaml
@@ -29,6 +29,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-support-export-runtime.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-support-export-runtime.ts
     summary: Run the real child CLI against a live isolated Gateway and inspect the resulting support zip privacy and artifact-safety contract.
     args:
diff --git a/qa/scenarios/observability/otel-generation-config-watcher.yaml b/qa/scenarios/observability/otel-generation-config-watcher.yaml
index 0ace44d1d5ff..14aa686abe7d 100644
--- a/qa/scenarios/observability/otel-generation-config-watcher.yaml
+++ b/qa/scenarios/observability/otel-generation-config-watcher.yaml
@@ -33,6 +33,7 @@ scenario:
     - test/e2e/qa-lab/runtime/otel-test-support.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/otel-generation-config-watcher-runtime.ts
     config:
       requiredProviderMode: mock-openai
diff --git a/qa/scenarios/plugins/mcp-plugin-tools-call.yaml b/qa/scenarios/plugins/mcp-plugin-tools-call.yaml
index ff0605161a15..de7c6aef2dd5 100644
--- a/qa/scenarios/plugins/mcp-plugin-tools-call.yaml
+++ b/qa/scenarios/plugins/mcp-plugin-tools-call.yaml
@@ -22,6 +22,7 @@ scenario:
     - src/mcp/plugin-tools-handlers.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-mcp-real-transports.ts
     summary: Registers a fixture plugin, starts the real plugin-tools stdio server, and calls its tool with a real MCP client.
     args:
diff --git a/qa/scenarios/plugins/voice-call-cli-rpc-agent-tool.yaml b/qa/scenarios/plugins/voice-call-cli-rpc-agent-tool.yaml
index 825f80e2bb1f..bf61a3ee7052 100644
--- a/qa/scenarios/plugins/voice-call-cli-rpc-agent-tool.yaml
+++ b/qa/scenarios/plugins/voice-call-cli-rpc-agent-tool.yaml
@@ -26,6 +26,7 @@ scenario:
     - test/e2e/qa-lab/runtime/voice-call-gateway.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/voice-call-gateway.ts
     summary: Starts a real Gateway and Voice Call plugin, runs the actual CLI plus RPC and tools.invoke entry points, then drives the runtime-issued realtime media stream through embedded-agent consult.
     args:
diff --git a/qa/scenarios/runtime/active-talk-agent-run-status.yaml b/qa/scenarios/runtime/active-talk-agent-run-status.yaml
index 3dc38f1d8eab..d1ce4acb4bf0 100644
--- a/qa/scenarios/runtime/active-talk-agent-run-status.yaml
+++ b/qa/scenarios/runtime/active-talk-agent-run-status.yaml
@@ -24,6 +24,7 @@ scenario:
     - test/e2e/qa-lab/runtime/media-talk-gateway.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/media-talk-gateway.ts
     summary: Starts a real Gateway and persistent WebChat client, creates a Talk session, starts an agent consult, and exercises status, steer, follow-up, and cancel RPCs.
     args:
diff --git a/qa/scenarios/runtime/agent-run-identity-inspection.yaml b/qa/scenarios/runtime/agent-run-identity-inspection.yaml
index eb4fc68761f4..34c1518a1548 100644
--- a/qa/scenarios/runtime/agent-run-identity-inspection.yaml
+++ b/qa/scenarios/runtime/agent-run-identity-inspection.yaml
@@ -30,6 +30,7 @@ scenario:
     - test/e2e/qa-lab/runtime/agent-run-identity-repeated-turn-child.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/agent-run-identity-inspection.ts
     summary: Starts an ephemeral Gateway and mock provider, runs local and repeated public-ingress turns, proves run ambiguity plus exact text/JSON selection, replaces the Gateway process, and compares normalized context bytes.
     args:
diff --git a/qa/scenarios/runtime/diagnostic-events-boundary.yaml b/qa/scenarios/runtime/diagnostic-events-boundary.yaml
index 3cd8e092d91d..abaafded380c 100644
--- a/qa/scenarios/runtime/diagnostic-events-boundary.yaml
+++ b/qa/scenarios/runtime/diagnostic-events-boundary.yaml
@@ -31,6 +31,7 @@ scenario:
     - test/e2e/qa-lab/runtime/diagnostic-events-boundary-runtime.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/diagnostic-events-boundary-runtime.ts
     config:
       requiredProviderMode: mock-openai
diff --git a/qa/scenarios/runtime/gateway-loopback-lan-access.yaml b/qa/scenarios/runtime/gateway-loopback-lan-access.yaml
index 1d4073eef24f..b2e345b4b953 100644
--- a/qa/scenarios/runtime/gateway-loopback-lan-access.yaml
+++ b/qa/scenarios/runtime/gateway-loopback-lan-access.yaml
@@ -25,6 +25,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-loopback-lan-access.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-loopback-lan-access.ts
     summary: Starts real loopback and LAN Gateway listeners, then probes their HTTP and WebSocket surfaces from loopback and the host's real LAN interface.
     args:
diff --git a/qa/scenarios/runtime/gateway-smoke.yaml b/qa/scenarios/runtime/gateway-smoke.yaml
index 73544fd3f247..186443f7a57e 100644
--- a/qa/scenarios/runtime/gateway-smoke.yaml
+++ b/qa/scenarios/runtime/gateway-smoke.yaml
@@ -23,6 +23,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-smoke.e2e.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-mcp-real-transports.ts
     summary: Starts a real Gateway child and exercises the Gateway smoke client against its WebSocket and health RPC surfaces.
     args:
diff --git a/qa/scenarios/runtime/gateway-ssh-tunnels.yaml b/qa/scenarios/runtime/gateway-ssh-tunnels.yaml
index 2f8793efdb36..0394042eeca7 100644
--- a/qa/scenarios/runtime/gateway-ssh-tunnels.yaml
+++ b/qa/scenarios/runtime/gateway-ssh-tunnels.yaml
@@ -25,6 +25,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-ssh-tunnels.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-ssh-tunnels.ts
     summary: Starts an isolated real sshd and loopback Gateway with scenario-owned host trust, then exercises success, cleanup, host-key rejection, unreachable-daemon diagnostics, overlap, and forced termination.
     timeoutMs: 120000
diff --git a/qa/scenarios/runtime/gateway-tls-pinning.yaml b/qa/scenarios/runtime/gateway-tls-pinning.yaml
index 8fe7e84ffe7f..d34efe7b94e8 100644
--- a/qa/scenarios/runtime/gateway-tls-pinning.yaml
+++ b/qa/scenarios/runtime/gateway-tls-pinning.yaml
@@ -25,6 +25,7 @@ scenario:
     - test/e2e/qa-lab/runtime/gateway-tls-pinning.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-tls-pinning.ts
     summary: Starts a real TLS Gateway and exercises exact-pin, wrong-pin, and plaintext mismatch behavior through the public GatewayClient.
     args:
diff --git a/qa/scenarios/runtime/gateway-websocket-protocol-contracts.yaml b/qa/scenarios/runtime/gateway-websocket-protocol-contracts.yaml
index c5745862778d..2012d03dd6de 100644
--- a/qa/scenarios/runtime/gateway-websocket-protocol-contracts.yaml
+++ b/qa/scenarios/runtime/gateway-websocket-protocol-contracts.yaml
@@ -28,6 +28,7 @@ scenario:
     - src/gateway/server-methods/nodes.read.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-websocket-protocol-contracts.ts
     summary: Starts a real Gateway child, drives raw WebSocket clients, and fetches a capability-scoped fixture plugin route.
     args:
diff --git a/qa/scenarios/runtime/logging-file-boundary.yaml b/qa/scenarios/runtime/logging-file-boundary.yaml
index 90ced80f4cdc..2bb829e72402 100644
--- a/qa/scenarios/runtime/logging-file-boundary.yaml
+++ b/qa/scenarios/runtime/logging-file-boundary.yaml
@@ -19,6 +19,7 @@ scenario:
     - test/e2e/qa-lab/runtime/logging-file-boundary-runtime.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/logging-file-boundary-runtime.ts
     summary: Runs the real logger with a tiny file cap and validates JSONL rotation and trace correlation.
     args:
diff --git a/qa/scenarios/runtime/mcp-gateway-connect-startup-retry.yaml b/qa/scenarios/runtime/mcp-gateway-connect-startup-retry.yaml
index 36f8eb763b91..2d87520cb441 100644
--- a/qa/scenarios/runtime/mcp-gateway-connect-startup-retry.yaml
+++ b/qa/scenarios/runtime/mcp-gateway-connect-startup-retry.yaml
@@ -23,6 +23,7 @@ scenario:
     - src/mcp/channel-bridge.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/gateway-mcp-real-transports.ts
     summary: Starts the real MCP client before a delayed real Gateway becomes ready and captures retry, connect-frame, and negotiated-protocol evidence.
     args:
diff --git a/qa/scenarios/runtime/qa-otel-smoke.yaml b/qa/scenarios/runtime/qa-otel-smoke.yaml
index cd58c5f4149a..c41e31120cbb 100644
--- a/qa/scenarios/runtime/qa-otel-smoke.yaml
+++ b/qa/scenarios/runtime/qa-otel-smoke.yaml
@@ -23,6 +23,7 @@ scenario:
     - extensions/diagnostics-otel/runtime-api.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/runtime/qa-otel-smoke-runtime.ts
     config:
       requiredProviderMode: mock-openai
diff --git a/qa/scenarios/ui/tui-command-surfaces-pty.yaml b/qa/scenarios/ui/tui-command-surfaces-pty.yaml
index 8db6da1746fd..84f29c497685 100644
--- a/qa/scenarios/ui/tui-command-surfaces-pty.yaml
+++ b/qa/scenarios/ui/tui-command-surfaces-pty.yaml
@@ -17,6 +17,7 @@ scenario:
     - src/tui/tui-pty-harness.e2e.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs independently matched real-PTY command surface assertions and authenticates their fresh Vitest results.
     timeoutMs: 180000
diff --git a/qa/scenarios/ui/tui-editor-input-pty.yaml b/qa/scenarios/ui/tui-editor-input-pty.yaml
index 2982e801ff17..0ae7c1723c23 100644
--- a/qa/scenarios/ui/tui-editor-input-pty.yaml
+++ b/qa/scenarios/ui/tui-editor-input-pty.yaml
@@ -25,6 +25,7 @@ scenario:
     - src/tui/tui-submit.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs independently matched real-PTY editor assertions and authenticates their fresh Vitest results.
     timeoutMs: 180000
diff --git a/qa/scenarios/ui/tui-entrypoints-pty.yaml b/qa/scenarios/ui/tui-entrypoints-pty.yaml
index 43ffd5002cec..d843a634a4bc 100644
--- a/qa/scenarios/ui/tui-entrypoints-pty.yaml
+++ b/qa/scenarios/ui/tui-entrypoints-pty.yaml
@@ -23,6 +23,7 @@ scenario:
     - test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs exact real-PTY TUI entrypoint assertions and authenticates their fresh Vitest results as QA evidence.
     timeoutMs: 300000
diff --git a/qa/scenarios/ui/tui-gateway-boundary-pty.yaml b/qa/scenarios/ui/tui-gateway-boundary-pty.yaml
index 72f25d964df3..d0b1b808d4e4 100644
--- a/qa/scenarios/ui/tui-gateway-boundary-pty.yaml
+++ b/qa/scenarios/ui/tui-gateway-boundary-pty.yaml
@@ -17,6 +17,7 @@ scenario:
   codeRefs: [src/tui/tui-pty-local.e2e.test.ts]
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     timeoutMs: 600000
     args: [--artifact-base, "${outputDir}", --scenario-id, "${scenarioId}"]
diff --git a/qa/scenarios/ui/tui-local-runtime-recovery-pty.yaml b/qa/scenarios/ui/tui-local-runtime-recovery-pty.yaml
index 6fa269a5dbab..c5f4083c29fb 100644
--- a/qa/scenarios/ui/tui-local-runtime-recovery-pty.yaml
+++ b/qa/scenarios/ui/tui-local-runtime-recovery-pty.yaml
@@ -19,6 +19,7 @@ scenario:
   codeRefs: [src/tui/tui-pty-local.e2e.test.ts]
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     timeoutMs: 720000
     args: [--artifact-base, "${outputDir}", --scenario-id, "${scenarioId}"]
diff --git a/qa/scenarios/ui/tui-local-shell-pty.yaml b/qa/scenarios/ui/tui-local-shell-pty.yaml
index 37b5c8aa476d..db27a659d977 100644
--- a/qa/scenarios/ui/tui-local-shell-pty.yaml
+++ b/qa/scenarios/ui/tui-local-shell-pty.yaml
@@ -23,6 +23,7 @@ scenario:
     - src/tui/tui-pty-local.e2e.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs exact built local-TUI PTY assertions and authenticates their fresh Vitest results as QA evidence.
     timeoutMs: 360000
diff --git a/qa/scenarios/ui/tui-pty-evidence-producer-contract.yaml b/qa/scenarios/ui/tui-pty-evidence-producer-contract.yaml
index 73fe726e7159..825b2098cefd 100644
--- a/qa/scenarios/ui/tui-pty-evidence-producer-contract.yaml
+++ b/qa/scenarios/ui/tui-pty-evidence-producer-contract.yaml
@@ -18,6 +18,7 @@ scenario:
     - src/tui/tui-pty-harness.e2e.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs configured TUI PTY assertions through the repository Vitest wrapper and verifies the fresh JSON report before emitting evidence.
     timeoutMs: 180000
diff --git a/qa/scenarios/ui/tui-session-management-pty.yaml b/qa/scenarios/ui/tui-session-management-pty.yaml
index d4aede10b033..50201df7be53 100644
--- a/qa/scenarios/ui/tui-session-management-pty.yaml
+++ b/qa/scenarios/ui/tui-session-management-pty.yaml
@@ -17,6 +17,7 @@ scenario:
   codeRefs: [src/tui/tui-pty-local.e2e.test.ts]
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     timeoutMs: 600000
     args: [--artifact-base, "${outputDir}", --scenario-id, "${scenarioId}"]
diff --git a/qa/scenarios/ui/tui-streaming-tool-cards-pty.yaml b/qa/scenarios/ui/tui-streaming-tool-cards-pty.yaml
index cf9084ea365c..8c0fc2f03593 100644
--- a/qa/scenarios/ui/tui-streaming-tool-cards-pty.yaml
+++ b/qa/scenarios/ui/tui-streaming-tool-cards-pty.yaml
@@ -20,6 +20,7 @@ scenario:
     - src/tui/tui-pty-harness.e2e.test.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     timeoutMs: 180000
     args: [--artifact-base, "${outputDir}", --scenario-id, "${scenarioId}"]
diff --git a/qa/scenarios/ui/tui-terminal-safety-pty.yaml b/qa/scenarios/ui/tui-terminal-safety-pty.yaml
index 25b499d264cf..e977833d4b9c 100644
--- a/qa/scenarios/ui/tui-terminal-safety-pty.yaml
+++ b/qa/scenarios/ui/tui-terminal-safety-pty.yaml
@@ -36,6 +36,7 @@ scenario:
     - src/tui/osc8-hyperlinks.ts
   execution:
     kind: script
+    parallelSafe: true
     path: test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
     summary: Runs independently matched real-PTY rendering and output-safety assertions and authenticates their fresh Vitest results.
     timeoutMs: 180000
diff --git a/src/tui/tui-pty-local.e2e.test.ts b/src/tui/tui-pty-local.e2e.test.ts
index d7691b6502e0..e1d7b77cba24 100644
--- a/src/tui/tui-pty-local.e2e.test.ts
+++ b/src/tui/tui-pty-local.e2e.test.ts
@@ -899,7 +899,11 @@ async function startGatewayModeTui(
     timeoutMs: LOCAL_OUTPUT_TIMEOUT_MS,
     read: () => {
       const screen = synchronizedFrameRows(run.output(), run)[0]?.join("\n") ?? "";
-      return screen.includes(sessionAcknowledgement) && screen.includes("| idle") ? true : null;
+      return screen.includes(sessionAcknowledgement) &&
+        screen.includes(scenario.modelId) &&
+        screen.includes("| idle")
+        ? true
+        : null;
     },
     onTimeout: () => new Error("adopted Gateway session did not reach an idle final screen"),
   });
@@ -1211,9 +1215,12 @@ describe("TUI PTY real backends", () => {
         const newOutput = fixture.run.visibleOutput().slice(newOffset);
         const createdKey = newOutput.match(/new session: (agent:main:tui-\S+)/)?.[1];
         expect(createdKey).toBeDefined();
-        const screen =
-          synchronizedFrameRows(fixture.run.output(), fixture.run)[0]?.join("\n") ?? "";
-        expect(screen).toContain(`session ${createdKey!.split(":").at(-1)}`);
+        const sessionLabel = `session ${createdKey!.split(":").at(-1)}`;
+        await waitForSynchronizedFrameRows(
+          fixture.run,
+          (rows) => rows.some((row) => row.includes(sessionLabel)),
+          LOCAL_OUTPUT_TIMEOUT_MS,
+        );
         const afterOffset = fixture.run.visibleOutput().length;
         await fixture.run.write("T03_LIFECYCLE_AFTER\r");
         await waitForOutputAfter(fixture.run, reply, afterOffset);
diff --git a/test/e2e/qa-lab/tui/tui-pty-evidence-producer.test.ts b/test/e2e/qa-lab/tui/tui-pty-evidence-producer.test.ts
index 46c47de57faa..1fd29be287ab 100644
--- a/test/e2e/qa-lab/tui/tui-pty-evidence-producer.test.ts
+++ b/test/e2e/qa-lab/tui/tui-pty-evidence-producer.test.ts
@@ -232,6 +232,7 @@ describe("TUI PTY evidence producer", () => {
   it("builds fake and local PTY commands with the required environment", () => {
     vi.stubEnv("OPENCLAW_TUI_PTY_INCLUDE_LOCAL", "1");
     vi.stubEnv("OPENCLAW_TUI_PTY_USE_BUILT_CLI", "inherited");
+    vi.stubEnv("OPENCLAW_VITEST_FS_MODULE_CACHE_PATH", "/shared/vitest-cache");
     const fake = buildTuiPtyVitestCommand({
       cases: [makeCase()],
       cliMode: "source",
@@ -252,6 +253,9 @@ describe("TUI PTY evidence producer", () => {
     expect(fake.env.OPENCLAW_BEHAVIOR_EVIDENCE).toBe("1");
     expect(fake.env.OPENCLAW_TUI_PTY_INCLUDE_LOCAL).toBeUndefined();
     expect(fake.env.OPENCLAW_TUI_PTY_USE_BUILT_CLI).toBeUndefined();
+    expect(fake.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH).toBe(
+      path.join("/artifacts", "vitest-fs-module-cache"),
+    );
 
     const oracle = buildTuiPtyVitestCommand({
       cases: [makeCase({ testFile: ASSERTION_SUPPORT_FILE })],
@@ -265,11 +269,17 @@ describe("TUI PTY evidence producer", () => {
       cases: [makeCase({ testFile: LOCAL_FILE })],
       cliMode: "built",
       repoRoot: "/repo",
-      reportPath: "/artifacts/report.json",
+      reportPath: "/artifacts-local/report.json",
     });
     expect(local.args).toContain(LOCAL_FILE);
     expect(local.env.OPENCLAW_TUI_PTY_INCLUDE_LOCAL).toBe("1");
     expect(local.env.OPENCLAW_TUI_PTY_USE_BUILT_CLI).toBe("1");
+    expect(oracle.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH).toBe(
+      fake.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH,
+    );
+    expect(local.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH).not.toBe(
+      fake.env.OPENCLAW_VITEST_FS_MODULE_CACHE_PATH,
+    );
   });
 
   it("rejects wrong-file and unmatched-pattern reports", async () => {
diff --git a/test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts b/test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
index 725ae4f5fe3e..48af752569d4 100644
--- a/test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
+++ b/test/e2e/qa-lab/tui/tui-pty-evidence-producer.ts
@@ -267,6 +267,10 @@ export function buildTuiPtyVitestCommand(params: {
   const env: NodeJS.ProcessEnv = {
     ...process.env,
     OPENCLAW_BEHAVIOR_EVIDENCE: "1",
+    OPENCLAW_VITEST_FS_MODULE_CACHE_PATH: path.join(
+      path.dirname(params.reportPath),
+      "vitest-fs-module-cache",
+    ),
   };
   if (usesLocalPty) {
     env.OPENCLAW_TUI_PTY_INCLUDE_LOCAL = "1";