diff --git a/docs/concepts/qa-e2e-automation.md b/docs/concepts/qa-e2e-automation.md
index 16c3ba241dd..8943e47653d 100644
--- a/docs/concepts/qa-e2e-automation.md
+++ b/docs/concepts/qa-e2e-automation.md
@@ -62,7 +62,10 @@ That lane provisions a disposable Tuwunel homeserver in Docker, registers
 temporary driver, SUT, and observer users, creates one private room, then runs
 the real Matrix plugin inside a QA gateway child. The live transport lane keeps
 the child config scoped to the transport under test, so Matrix runs without
-`qa-channel` in the child config.
+`qa-channel` in the child config. It writes the structured report artifacts and
+a combined stdout/stderr log into the selected Matrix QA output directory. To
+capture the outer `scripts/run-node.mjs` build/launcher output too, set
+`OPENCLAW_RUN_NODE_OUTPUT_LOG=<path>` to a repo-local log file.
 
 For a transport-real Telegram smoke lane, run:
 
diff --git a/docs/help/testing.md b/docs/help/testing.md
index 66a44eb4419..2242c30c79f 100644
--- a/docs/help/testing.md
+++ b/docs/help/testing.md
@@ -74,7 +74,7 @@ These commands sit beside the main test suites when you need QA-lab realism:
   - Provisions three temporary Matrix users (`driver`, `sut`, `observer`) plus one private room, then starts a QA gateway child with the real Matrix plugin as the SUT transport.
   - Uses the pinned stable Tuwunel image `ghcr.io/matrix-construct/tuwunel:v1.5.1` by default. Override with `OPENCLAW_QA_MATRIX_TUWUNEL_IMAGE` when you need to test a different image.
   - Matrix does not expose shared credential-source flags because the lane provisions disposable users locally.
-  - Writes a Matrix QA report, summary, and observed-events artifact under `.artifacts/qa-e2e/...`.
+  - Writes a Matrix QA report, summary, observed-events artifact, and combined stdout/stderr output log under `.artifacts/qa-e2e/...`.
 - `pnpm openclaw qa telegram`
   - Runs the Telegram live QA lane against a real private group using the driver and SUT bot tokens from env.
   - Requires `OPENCLAW_QA_TELEGRAM_GROUP_ID`, `OPENCLAW_QA_TELEGRAM_DRIVER_BOT_TOKEN`, and `OPENCLAW_QA_TELEGRAM_SUT_BOT_TOKEN`. The group id must be the numeric Telegram chat id.
diff --git a/extensions/qa-matrix/src/cli.runtime.test.ts b/extensions/qa-matrix/src/cli.runtime.test.ts
index 81a91e3ee9e..24c04c38d20 100644
--- a/extensions/qa-matrix/src/cli.runtime.test.ts
+++ b/extensions/qa-matrix/src/cli.runtime.test.ts
@@ -1,14 +1,37 @@
-import { describe, expect, it, vi } from "vitest";
+import { mkdir, mkdtemp, readFile, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it, vi } from "vitest";
 
 const runMatrixQaLive = vi.hoisted(() => vi.fn());
+const closeGlobalDispatcher = vi.hoisted(() => vi.fn(async () => {}));
 
 vi.mock("./runners/contract/runtime.js", () => ({
   runMatrixQaLive,
 }));
+vi.mock("undici", () => ({
+  getGlobalDispatcher: () => ({
+    close: closeGlobalDispatcher,
+  }),
+}));
 
 import { runQaMatrixCommand } from "./cli.runtime.js";
 
+const tmpDirs: string[] = [];
+
 describe("matrix qa cli runtime", () => {
+  const originalRunNodeOutputLog = process.env.OPENCLAW_RUN_NODE_OUTPUT_LOG;
+
+  afterEach(async () => {
+    vi.clearAllMocks();
+    if (originalRunNodeOutputLog === undefined) {
+      delete process.env.OPENCLAW_RUN_NODE_OUTPUT_LOG;
+    } else {
+      process.env.OPENCLAW_RUN_NODE_OUTPUT_LOG = originalRunNodeOutputLog;
+    }
+    await Promise.all(tmpDirs.splice(0).map((dir) => rm(dir, { recursive: true, force: true })));
+  });
+
   it("rejects non-env credential sources for the disposable Matrix lane", async () => {
     await expect(
       runQaMatrixCommand({
@@ -18,26 +41,95 @@ describe("matrix qa cli runtime", () => {
   });
 
   it("passes through default env credential source options", async () => {
+    const repoRoot = await mkdtemp(path.join(os.tmpdir(), "matrix-qa-cli-"));
+    tmpDirs.push(repoRoot);
     runMatrixQaLive.mockResolvedValue({
       reportPath: "/tmp/matrix-report.md",
       summaryPath: "/tmp/matrix-summary.json",
       observedEventsPath: "/tmp/matrix-events.json",
     });
+    const originalStdoutWrite = process.stdout.write;
+    process.stdout.write = (() => true) as typeof process.stdout.write;
 
-    await runQaMatrixCommand({
-      repoRoot: "/tmp/openclaw",
-      outputDir: ".artifacts/qa-e2e/matrix",
-      providerMode: "mock-openai",
-      credentialSource: "env",
-    });
+    try {
+      await runQaMatrixCommand({
+        repoRoot,
+        outputDir: ".artifacts/qa-e2e/matrix",
+        providerMode: "mock-openai",
+        credentialSource: "env",
+      });
+    } finally {
+      process.stdout.write = originalStdoutWrite;
+    }
 
     expect(runMatrixQaLive).toHaveBeenCalledWith(
       expect.objectContaining({
-        repoRoot: "/tmp/openclaw",
-        outputDir: "/tmp/openclaw/.artifacts/qa-e2e/matrix",
+        repoRoot,
+        outputDir: path.join(repoRoot, ".artifacts/qa-e2e/matrix"),
         providerMode: "mock-openai",
         credentialSource: "env",
       }),
     );
+    expect(closeGlobalDispatcher).toHaveBeenCalledTimes(1);
+  });
+
+  it("reuses a run-node output log instead of installing a nested tee", async () => {
+    const repoRoot = await mkdtemp(path.join(os.tmpdir(), "matrix-qa-cli-"));
+    tmpDirs.push(repoRoot);
+    const outputPath = path.join(repoRoot, "run-node-output.log");
+    process.env.OPENCLAW_RUN_NODE_OUTPUT_LOG = outputPath;
+    runMatrixQaLive.mockResolvedValue({
+      reportPath: "/tmp/matrix-report.md",
+      summaryPath: "/tmp/matrix-summary.json",
+      observedEventsPath: "/tmp/matrix-events.json",
+    });
+    const originalStdoutWrite = process.stdout.write;
+    process.stdout.write = vi.fn(() => true) as unknown as typeof process.stdout.write;
+
+    try {
+      await runQaMatrixCommand({
+        repoRoot,
+        outputDir: ".artifacts/qa-e2e/matrix",
+        providerMode: "mock-openai",
+        credentialSource: "env",
+      });
+    } finally {
+      process.stdout.write = originalStdoutWrite;
+    }
+
+    expect(runMatrixQaLive).toHaveBeenCalledOnce();
+    await expect(readFile(outputPath, "utf8")).rejects.toMatchObject({ code: "ENOENT" });
+  });
+
+  it("preserves the Matrix QA failure when output log cleanup also fails", async () => {
+    const repoRoot = await mkdtemp(path.join(os.tmpdir(), "matrix-qa-cli-"));
+    tmpDirs.push(repoRoot);
+    const outputDir = path.join(repoRoot, ".artifacts", "qa-e2e", "matrix");
+    await mkdir(path.join(outputDir, "matrix-qa-output.log"), { recursive: true });
+    runMatrixQaLive.mockRejectedValue(new Error("scenario failed"));
+    const stderrChunks: string[] = [];
+    const originalStdoutWrite = process.stdout.write;
+    const originalStderrWrite = process.stderr.write;
+    process.stdout.write = (() => true) as typeof process.stdout.write;
+    process.stderr.write = ((chunk: string | Buffer) => {
+      stderrChunks.push(String(chunk));
+      return true;
+    }) as typeof process.stderr.write;
+
+    try {
+      await expect(
+        runQaMatrixCommand({
+          repoRoot,
+          outputDir: ".artifacts/qa-e2e/matrix",
+          providerMode: "mock-openai",
+          credentialSource: "env",
+        }),
+      ).rejects.toThrow("scenario failed");
+    } finally {
+      process.stdout.write = originalStdoutWrite;
+      process.stderr.write = originalStderrWrite;
+    }
+
+    expect(stderrChunks.join("")).toContain("Matrix QA output log error");
   });
 });
diff --git a/extensions/qa-matrix/src/cli.runtime.ts b/extensions/qa-matrix/src/cli.runtime.ts
index 485f0ff023d..a79aa9764b2 100644
--- a/extensions/qa-matrix/src/cli.runtime.ts
+++ b/extensions/qa-matrix/src/cli.runtime.ts
@@ -3,8 +3,50 @@ import type { LiveTransportQaCommandOptions } from "./shared/live-transport-cli.
 import {
   printLiveTransportQaArtifacts,
   resolveLiveTransportQaRunOptions,
+  startLiveTransportQaOutputTee,
 } from "./shared/live-transport-cli.runtime.js";
 
+const RUN_NODE_OUTPUT_LOG_ENV = "OPENCLAW_RUN_NODE_OUTPUT_LOG";
+
+async function closeMatrixQaCommandFetchHandles() {
+  try {
+    const { getGlobalDispatcher } = await import("undici");
+    const dispatcher = getGlobalDispatcher() as {
+      close?: () => Promise<void> | void;
+    };
+    await dispatcher.close?.();
+  } catch {
+    // Best-effort cleanup for short-lived QA commands. The command result and
+    // artifacts are already written; stale fetch keep-alive handles should not
+    // turn a green run into a failure.
+  }
+}
+
+function formatMatrixQaOutputTeeError(error: unknown) {
+  if (error instanceof Error) {
+    return error.message;
+  }
+  if (typeof error === "string") {
+    return error;
+  }
+  return "unknown error";
+}
+
+async function createMatrixQaCommandOutputTee(outputDir: string) {
+  const inheritedOutputPath = process.env[RUN_NODE_OUTPUT_LOG_ENV]?.trim();
+  if (inheritedOutputPath) {
+    return {
+      outputPath: inheritedOutputPath,
+      async stop() {},
+    };
+  }
+
+  return await startLiveTransportQaOutputTee({
+    fileName: "matrix-qa-output.log",
+    outputDir,
+  });
+}
+
 export async function runQaMatrixCommand(opts: LiveTransportQaCommandOptions) {
   const runOptions = resolveLiveTransportQaRunOptions(opts);
   const credentialSource = runOptions.credentialSource?.toLowerCase();
@@ -14,10 +56,36 @@ export async function runQaMatrixCommand(opts: LiveTransportQaCommandOptions) {
     );
   }
 
-  const result = await runMatrixQaLive(runOptions);
-  printLiveTransportQaArtifacts("Matrix QA", {
-    report: result.reportPath,
-    summary: result.summaryPath,
-    "observed events": result.observedEventsPath,
-  });
+  const outputTee = await createMatrixQaCommandOutputTee(runOptions.outputDir);
+  let primaryError: unknown;
+  let outputTeeError: unknown;
+  try {
+    process.stdout.write(`Matrix QA output: ${outputTee.outputPath}\n`);
+    const result = await runMatrixQaLive(runOptions);
+    printLiveTransportQaArtifacts("Matrix QA", {
+      report: result.reportPath,
+      summary: result.summaryPath,
+      "observed events": result.observedEventsPath,
+    });
+  } catch (error) {
+    primaryError = error;
+  } finally {
+    try {
+      await outputTee.stop();
+    } catch (error) {
+      outputTeeError = error;
+    }
+    await closeMatrixQaCommandFetchHandles();
+  }
+  if (primaryError) {
+    if (outputTeeError) {
+      process.stderr.write(
+        `Matrix QA output log error: ${formatMatrixQaOutputTeeError(outputTeeError)}\n`,
+      );
+    }
+    throw primaryError;
+  }
+  if (outputTeeError) {
+    throw outputTeeError;
+  }
 }
diff --git a/extensions/qa-matrix/src/cli.ts b/extensions/qa-matrix/src/cli.ts
index 6a81d8a5502..f95776850f7 100644
--- a/extensions/qa-matrix/src/cli.ts
+++ b/extensions/qa-matrix/src/cli.ts
@@ -12,9 +12,30 @@ const loadMatrixQaCliRuntime = createLazyCliRuntimeLoader<MatrixQaCliRuntime>(
   () => import("./cli.runtime.js"),
 );
 
+async function flushProcessStream(stream: NodeJS.WriteStream) {
+  if (stream.destroyed || !stream.writable) {
+    return;
+  }
+  await new Promise<void>((resolve) => {
+    try {
+      stream.write("", () => resolve());
+    } catch {
+      resolve();
+    }
+  });
+}
+
 async function runQaMatrix(opts: LiveTransportQaCommandOptions) {
   const runtime = await loadMatrixQaCliRuntime();
   await runtime.runQaMatrixCommand(opts);
+  if (process.env.OPENCLAW_QA_MATRIX_DISABLE_SUCCESS_EXIT !== "1") {
+    // Matrix crypto native handles can outlive the QA run even after every
+    // client/gateway/harness has been stopped. This command is single-shot, so
+    // a successful artifact write should terminate deterministically instead of
+    // waiting for external timeout cleanup.
+    await Promise.all([flushProcessStream(process.stdout), flushProcessStream(process.stderr)]);
+    process.exit(0);
+  }
 }
 
 export const matrixQaCliRegistration: LiveTransportQaCliRegistration =
diff --git a/extensions/qa-matrix/src/shared/live-transport-cli.runtime.test.ts b/extensions/qa-matrix/src/shared/live-transport-cli.runtime.test.ts
new file mode 100644
index 00000000000..71836c696b6
--- /dev/null
+++ b/extensions/qa-matrix/src/shared/live-transport-cli.runtime.test.ts
@@ -0,0 +1,68 @@
+import { mkdir, mkdtemp, readFile, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { startLiveTransportQaOutputTee } from "./live-transport-cli.runtime.js";
+
+const tmpDirs: string[] = [];
+
+describe("live transport CLI runtime", () => {
+  afterEach(async () => {
+    await Promise.all(tmpDirs.splice(0).map((dir) => rm(dir, { recursive: true, force: true })));
+  });
+
+  it("tees stdout and stderr into an output artifact", async () => {
+    const outputDir = await mkdtemp(path.join(os.tmpdir(), "matrix-qa-output-"));
+    tmpDirs.push(outputDir);
+    const originalStdoutWrite = process.stdout.write;
+    const originalStderrWrite = process.stderr.write;
+    process.stdout.write = (() => true) as typeof process.stdout.write;
+    process.stderr.write = (() => true) as typeof process.stderr.write;
+
+    const tee = await startLiveTransportQaOutputTee({
+      fileName: "matrix-qa-output.log",
+      outputDir,
+    });
+    try {
+      process.stdout.write("stdout marker\n");
+      process.stderr.write("stderr marker\n");
+      await tee.stop();
+    } finally {
+      process.stdout.write = originalStdoutWrite;
+      process.stderr.write = originalStderrWrite;
+    }
+
+    expect(process.stdout.write).toBe(originalStdoutWrite);
+    expect(process.stderr.write).toBe(originalStderrWrite);
+    await expect(readFile(tee.outputPath, "utf8")).resolves.toContain("stdout marker\n");
+    await expect(readFile(tee.outputPath, "utf8")).resolves.toContain("stderr marker\n");
+  });
+
+  it("surfaces output artifact stream errors after restoring process writes", async () => {
+    const outputDir = await mkdtemp(path.join(os.tmpdir(), "matrix-qa-output-"));
+    tmpDirs.push(outputDir);
+    await rm(path.join(outputDir, "matrix-qa-output.log"), { recursive: true, force: true });
+    await mkdir(path.join(outputDir, "matrix-qa-output.log"), { recursive: true });
+    const originalStdoutWrite = process.stdout.write;
+    const originalStderrWrite = process.stderr.write;
+    const mutedStdoutWrite = (() => true) as typeof process.stdout.write;
+    const mutedStderrWrite = (() => true) as typeof process.stderr.write;
+    process.stdout.write = mutedStdoutWrite;
+    process.stderr.write = mutedStderrWrite;
+
+    try {
+      const tee = await startLiveTransportQaOutputTee({
+        fileName: "matrix-qa-output.log",
+        outputDir,
+      });
+      process.stdout.write("stdout marker\n");
+      await expect(tee.stop()).rejects.toMatchObject({ code: "EISDIR" });
+
+      expect(process.stdout.write).toBe(mutedStdoutWrite);
+      expect(process.stderr.write).toBe(mutedStderrWrite);
+    } finally {
+      process.stdout.write = originalStdoutWrite;
+      process.stderr.write = originalStderrWrite;
+    }
+  });
+});
diff --git a/extensions/qa-matrix/src/shared/live-transport-cli.runtime.ts b/extensions/qa-matrix/src/shared/live-transport-cli.runtime.ts
index b840b2d6712..ffea62128d6 100644
--- a/extensions/qa-matrix/src/shared/live-transport-cli.runtime.ts
+++ b/extensions/qa-matrix/src/shared/live-transport-cli.runtime.ts
@@ -1,3 +1,5 @@
+import fs from "node:fs";
+import fsp from "node:fs/promises";
 import path from "node:path";
 import { resolveRepoRelativeOutputDir } from "../cli-paths.js";
 import type { QaProviderMode } from "../run-config.js";
@@ -7,15 +9,17 @@ import type { LiveTransportQaCommandOptions } from "./live-transport-cli.js";
 export function resolveLiveTransportQaRunOptions(
   opts: LiveTransportQaCommandOptions,
 ): LiveTransportQaCommandOptions & {
+  outputDir: string;
   repoRoot: string;
   providerMode: QaProviderMode;
 } {
+  const repoRoot = path.resolve(opts.repoRoot ?? process.cwd());
+  const outputDir =
+    resolveRepoRelativeOutputDir(repoRoot, opts.outputDir) ??
+    path.join(repoRoot, ".artifacts", "qa-e2e", `matrix-${Date.now().toString(36)}`);
   return {
-    repoRoot: path.resolve(opts.repoRoot ?? process.cwd()),
-    outputDir: resolveRepoRelativeOutputDir(
-      path.resolve(opts.repoRoot ?? process.cwd()),
-      opts.outputDir,
-    ),
+    repoRoot,
+    outputDir,
     providerMode:
       opts.providerMode === undefined
         ? "live-frontier"
@@ -38,3 +42,65 @@ export function printLiveTransportQaArtifacts(
     process.stdout.write(`${laneLabel} ${label}: ${filePath}\n`);
   }
 }
+
+type ProcessWriteCallback = (err?: Error | null) => void;
+
+export async function startLiveTransportQaOutputTee(params: {
+  fileName: string;
+  outputDir: string;
+}) {
+  await fsp.mkdir(params.outputDir, { recursive: true });
+  const outputPath = path.join(params.outputDir, params.fileName);
+  const output = fs.createWriteStream(outputPath, {
+    encoding: "utf8",
+    flags: "a",
+    mode: 0o600,
+  });
+  let outputError: Error | null = null;
+  output.on("error", (error) => {
+    outputError ??= error;
+  });
+  const originalStdoutWrite = Reflect.get(process.stdout, "write");
+  const originalStderrWrite = Reflect.get(process.stderr, "write");
+  const boundStdoutWrite = originalStdoutWrite.bind(process.stdout);
+  const boundStderrWrite = originalStderrWrite.bind(process.stderr);
+  let stopped = false;
+
+  const tee = (originalWrite: typeof process.stdout.write) =>
+    function writeWithTee(
+      this: NodeJS.WriteStream,
+      chunk: string | Uint8Array,
+      encodingOrCallback?: BufferEncoding | ProcessWriteCallback,
+      callback?: ProcessWriteCallback,
+    ) {
+      if (!stopped && !outputError) {
+        output.write(chunk);
+      }
+      return Reflect.apply(originalWrite, this, [chunk, encodingOrCallback, callback]) as boolean;
+    };
+
+  process.stdout.write = tee(boundStdoutWrite) as typeof process.stdout.write;
+  process.stderr.write = tee(boundStderrWrite) as typeof process.stderr.write;
+
+  return {
+    outputPath,
+    async stop() {
+      if (stopped) {
+        return;
+      }
+      stopped = true;
+      process.stdout.write = originalStdoutWrite;
+      process.stderr.write = originalStderrWrite;
+      if (outputError) {
+        throw outputError;
+      }
+      await new Promise<void>((resolve, reject) => {
+        output.once("error", reject);
+        output.end(resolve);
+      });
+      if (outputError) {
+        throw outputError;
+      }
+    },
+  };
+}
diff --git a/scripts/run-node.mjs b/scripts/run-node.mjs
index f956f308592..99503b8c4c3 100644
--- a/scripts/run-node.mjs
+++ b/scripts/run-node.mjs
@@ -283,11 +283,60 @@ const isSignalKey = (signal) => Object.hasOwn(SIGNAL_EXIT_CODES, signal);
 
 const getSignalExitCode = (signal) => (isSignalKey(signal) ? SIGNAL_EXIT_CODES[signal] : 1);
 
+const RUN_NODE_OUTPUT_LOG_ENV = "OPENCLAW_RUN_NODE_OUTPUT_LOG";
+
+const resolveRunNodeOutputLogPath = (deps) => {
+  const outputLog = deps.env[RUN_NODE_OUTPUT_LOG_ENV]?.trim();
+  if (!outputLog) {
+    return null;
+  }
+  return path.resolve(deps.cwd, outputLog);
+};
+
+const createRunNodeOutputTee = (deps) => {
+  const outputLogPath = resolveRunNodeOutputLogPath(deps);
+  if (!outputLogPath) {
+    return null;
+  }
+  deps.fs.mkdirSync(path.dirname(outputLogPath), { recursive: true });
+  const stream = deps.fs.createWriteStream(outputLogPath, {
+    flags: "a",
+    mode: 0o600,
+  });
+  let streamError = null;
+  stream.on("error", (error) => {
+    streamError = error;
+  });
+  deps.env[RUN_NODE_OUTPUT_LOG_ENV] = outputLogPath;
+  return {
+    outputLogPath,
+    write(chunk) {
+      if (!streamError) {
+        stream.write(chunk);
+      }
+    },
+    async close() {
+      if (streamError) {
+        throw streamError;
+      }
+      await new Promise((resolve, reject) => {
+        stream.once("error", reject);
+        stream.end(resolve);
+      });
+      if (streamError) {
+        throw streamError;
+      }
+    },
+  };
+};
+
 const logRunner = (message, deps) => {
   if (deps.env.OPENCLAW_RUNNER_LOG === "0") {
     return;
   }
-  deps.stderr.write(`[openclaw] ${message}\n`);
+  const line = `[openclaw] ${message}\n`;
+  deps.stderr.write(line);
+  deps.outputTee?.write(line);
 };
 
 const waitForSpawnedProcess = async (childProcess, deps) => {
@@ -337,22 +386,60 @@ const waitForSpawnedProcess = async (childProcess, deps) => {
   }
 };
 
-const runOpenClaw = async (deps) => {
-  const nodeProcess = deps.spawn(deps.execPath, ["openclaw.mjs", ...deps.args], {
-    cwd: deps.cwd,
-    env: deps.env,
-    stdio: "inherit",
-  });
-  const res = await waitForSpawnedProcess(nodeProcess, deps);
+const getInterruptedSpawnExitCode = (res) => {
   if (res.exitSignal) {
     return getSignalExitCode(res.exitSignal);
   }
   if (res.forwardedSignal) {
     return getSignalExitCode(res.forwardedSignal);
   }
+  return null;
+};
+
+const runOpenClaw = async (deps) => {
+  const nodeProcess = deps.spawn(deps.execPath, ["openclaw.mjs", ...deps.args], {
+    cwd: deps.cwd,
+    env: deps.env,
+    stdio: deps.outputTee ? ["inherit", "pipe", "pipe"] : "inherit",
+  });
+  pipeSpawnedOutput(nodeProcess, deps);
+  const res = await waitForSpawnedProcess(nodeProcess, deps);
+  const interruptedExitCode = getInterruptedSpawnExitCode(res);
+  if (interruptedExitCode !== null) {
+    return interruptedExitCode;
+  }
   return res.exitCode ?? 1;
 };
 
+const pipeSpawnedOutput = (childProcess, deps) => {
+  if (!deps.outputTee) {
+    return;
+  }
+  childProcess.stdout?.on("data", (chunk) => {
+    deps.stdout.write(chunk);
+    deps.outputTee.write(chunk);
+  });
+  childProcess.stderr?.on("data", (chunk) => {
+    deps.stderr.write(chunk);
+    deps.outputTee.write(chunk);
+  });
+};
+
+const closeRunNodeOutputTee = async (deps, exitCode) => {
+  if (!deps.outputTee) {
+    return exitCode;
+  }
+  try {
+    await deps.outputTee.close();
+  } catch (error) {
+    deps.stderr.write(
+      `[openclaw] Failed to write output log: ${error?.message ?? "unknown error"}\n`,
+    );
+    return exitCode === 0 ? 1 : exitCode;
+  }
+  return exitCode;
+};
+
 const syncRuntimeArtifacts = (deps) => {
   try {
     deps.runRuntimePostBuild({ cwd: deps.cwd });
@@ -387,6 +474,7 @@ export async function runNodeMain(params = {}) {
     spawnSync: params.spawnSync ?? spawnSync,
     fs: params.fs ?? fs,
     stderr: params.stderr ?? process.stderr,
+    stdout: params.stdout ?? process.stdout,
     process: params.process ?? process,
     execPath: params.execPath ?? process.execPath,
     cwd: params.cwd ?? process.cwd(),
@@ -408,42 +496,50 @@ export async function runNodeMain(params = {}) {
     deps.env.OPENCLAW_BUILD_PRIVATE_QA = "1";
     deps.env.OPENCLAW_ENABLE_PRIVATE_QA_CLI = "1";
   }
+  deps.outputTee = createRunNodeOutputTee(deps);
 
-  const buildRequirement = resolveBuildRequirement(deps);
-  if (!buildRequirement.shouldBuild) {
-    if (!shouldSkipCleanWatchRuntimeSync(deps) && !syncRuntimeArtifacts(deps)) {
-      return 1;
+  try {
+    let exitCode = 1;
+    const buildRequirement = resolveBuildRequirement(deps);
+    if (!buildRequirement.shouldBuild) {
+      if (!shouldSkipCleanWatchRuntimeSync(deps) && !syncRuntimeArtifacts(deps)) {
+        return await closeRunNodeOutputTee(deps, 1);
+      }
+      exitCode = await runOpenClaw(deps);
+      return await closeRunNodeOutputTee(deps, exitCode);
     }
-    return await runOpenClaw(deps);
-  }
 
-  logRunner(
-    `Building TypeScript (dist is stale: ${buildRequirement.reason} - ${formatBuildReason(buildRequirement.reason)}).`,
-    deps,
-  );
-  const buildCmd = deps.execPath;
-  const buildArgs = compilerArgs;
-  const build = deps.spawn(buildCmd, buildArgs, {
-    cwd: deps.cwd,
-    env: deps.env,
-    stdio: "inherit",
-  });
+    logRunner(
+      `Building TypeScript (dist is stale: ${buildRequirement.reason} - ${formatBuildReason(buildRequirement.reason)}).`,
+      deps,
+    );
+    const buildCmd = deps.execPath;
+    const buildArgs = compilerArgs;
+    const build = deps.spawn(buildCmd, buildArgs, {
+      cwd: deps.cwd,
+      env: deps.env,
+      stdio: deps.outputTee ? ["inherit", "pipe", "pipe"] : "inherit",
+    });
+    pipeSpawnedOutput(build, deps);
 
-  const buildRes = await waitForSpawnedProcess(build, deps);
-  if (buildRes.exitSignal) {
-    return getSignalExitCode(buildRes.exitSignal);
+    const buildRes = await waitForSpawnedProcess(build, deps);
+    const interruptedExitCode = getInterruptedSpawnExitCode(buildRes);
+    if (interruptedExitCode !== null) {
+      return await closeRunNodeOutputTee(deps, interruptedExitCode);
+    }
+    if (buildRes.exitCode !== 0 && buildRes.exitCode !== null) {
+      return await closeRunNodeOutputTee(deps, buildRes.exitCode);
+    }
+    if (!syncRuntimeArtifacts(deps)) {
+      return await closeRunNodeOutputTee(deps, 1);
+    }
+    writeBuildStamp(deps);
+    exitCode = await runOpenClaw(deps);
+    return await closeRunNodeOutputTee(deps, exitCode);
+  } catch (error) {
+    await closeRunNodeOutputTee(deps, 1);
+    throw error;
   }
-  if (buildRes.forwardedSignal) {
-    return getSignalExitCode(buildRes.forwardedSignal);
-  }
-  if (buildRes.exitCode !== 0 && buildRes.exitCode !== null) {
-    return buildRes.exitCode;
-  }
-  if (!syncRuntimeArtifacts(deps)) {
-    return 1;
-  }
-  writeBuildStamp(deps);
-  return await runOpenClaw(deps);
 }
 
 if (import.meta.url === pathToFileURL(process.argv[1] ?? "").href) {
diff --git a/src/infra/run-node.test.ts b/src/infra/run-node.test.ts
index 4a10a94f25c..e8b37288ea6 100644
--- a/src/infra/run-node.test.ts
+++ b/src/infra/run-node.test.ts
@@ -50,6 +50,34 @@ function createExitedProcess(code: number | null, signal: string | null = null)
   };
 }
 
+function createPipedExitedProcess(params: {
+  code?: number | null;
+  signal?: string | null;
+  stderr?: string;
+  stdout?: string;
+}) {
+  const stdout = new EventEmitter();
+  const stderr = new EventEmitter();
+  return {
+    stdout,
+    stderr,
+    on: (event: string, cb: (code: number | null, signal: string | null) => void) => {
+      if (event === "exit") {
+        queueMicrotask(() => {
+          if (params.stdout) {
+            stdout.emit("data", Buffer.from(params.stdout));
+          }
+          if (params.stderr) {
+            stderr.emit("data", Buffer.from(params.stderr));
+          }
+          cb(params.code ?? 0, params.signal ?? null);
+        });
+      }
+      return undefined;
+    },
+  };
+}
+
 function createFakeProcess() {
   return Object.assign(new EventEmitter(), {
     pid: 4242,
@@ -322,6 +350,125 @@ describe("run-node script", () => {
     });
   });
 
+  it("tees launcher output into the requested generic output log", async () => {
+    await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
+      await setupTrackedProject(tmp);
+      const outputPath = path.join(tmp, ".artifacts", "qa-e2e", "matrix", "output.log");
+      const spawnCalls: Array<{
+        args: string[];
+        env: Record<string, string | undefined>;
+        stdio: unknown;
+      }> = [];
+      const spawn = (_cmd: string, args: string[], options?: unknown) => {
+        const opts = options as { env?: NodeJS.ProcessEnv; stdio?: unknown } | undefined;
+        spawnCalls.push({
+          args,
+          env: { ...opts?.env },
+          stdio: opts?.stdio,
+        });
+        return createPipedExitedProcess({
+          stdout: args[0] === "openclaw.mjs" ? "child stdout\n" : "",
+          stderr: args[0] === "openclaw.mjs" ? "child stderr\n" : "",
+        });
+      };
+      const mutedStream = {
+        write: () => true,
+      } as unknown as NodeJS.WriteStream;
+
+      const exitCode = await runNodeMain({
+        cwd: tmp,
+        args: ["status"],
+        env: {
+          ...process.env,
+          OPENCLAW_FORCE_BUILD: "1",
+          OPENCLAW_RUNNER_LOG: "1",
+          OPENCLAW_RUN_NODE_OUTPUT_LOG: outputPath,
+        },
+        spawn,
+        stderr: mutedStream,
+        stdout: mutedStream,
+        execPath: process.execPath,
+        platform: process.platform,
+      } as Parameters<typeof runNodeMain>[0] & { stdout: NodeJS.WriteStream });
+
+      expect(exitCode).toBe(0);
+      await expect(fs.readFile(outputPath, "utf-8")).resolves.toContain("child stdout\n");
+      await expect(fs.readFile(outputPath, "utf-8")).resolves.toContain("child stderr\n");
+      await expect(fs.readFile(outputPath, "utf-8")).resolves.toContain("[openclaw]");
+      expect(spawnCalls.at(-1)?.args).toEqual(["openclaw.mjs", "status"]);
+      expect(spawnCalls.at(-1)?.env.OPENCLAW_RUN_NODE_OUTPUT_LOG).toBe(outputPath);
+      expect(spawnCalls.at(-1)?.stdio).toEqual(["inherit", "pipe", "pipe"]);
+    });
+  });
+
+  it("surfaces generic output log stream errors", async () => {
+    await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
+      await setupTrackedProject(tmp);
+      const outputPath = path.join(tmp, ".artifacts", "qa-e2e", "matrix", "output.log");
+      await fs.mkdir(outputPath, { recursive: true });
+      const spawn = () => createPipedExitedProcess({ stdout: "child stdout\n" });
+      const stderrChunks: string[] = [];
+      const mutedStream = {
+        write: (chunk: string | Buffer) => {
+          stderrChunks.push(String(chunk));
+          return true;
+        },
+      } as unknown as NodeJS.WriteStream;
+
+      const exitCode = await runNodeMain({
+        cwd: tmp,
+        args: ["status"],
+        env: {
+          ...process.env,
+          OPENCLAW_RUNNER_LOG: "0",
+          OPENCLAW_RUN_NODE_OUTPUT_LOG: outputPath,
+        },
+        spawn,
+        stderr: mutedStream,
+        stdout: mutedStream,
+        execPath: process.execPath,
+        platform: process.platform,
+      } as Parameters<typeof runNodeMain>[0] & { stdout: NodeJS.WriteStream });
+
+      expect(exitCode).toBe(1);
+      expect(stderrChunks.join("")).toContain("Failed to write output log");
+    });
+  });
+
+  it("does not mutate Matrix QA args when no generic output log is requested", async () => {
+    await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
+      await setupTrackedProject(tmp);
+      const spawnCalls: Array<{ args: string[]; env: Record<string, string | undefined> }> = [];
+      const spawn = (_cmd: string, args: string[], options?: unknown) => {
+        const opts = options as { env?: NodeJS.ProcessEnv } | undefined;
+        spawnCalls.push({ args, env: { ...opts?.env } });
+        return createPipedExitedProcess({});
+      };
+      const mutedStream = {
+        write: () => true,
+      } as unknown as NodeJS.WriteStream;
+
+      const exitCode = await runNodeMain({
+        cwd: tmp,
+        args: ["qa", "matrix"],
+        env: {
+          ...process.env,
+          OPENCLAW_RUNNER_LOG: "0",
+        },
+        spawn,
+        stderr: mutedStream,
+        stdout: mutedStream,
+        execPath: process.execPath,
+        platform: process.platform,
+      } as Parameters<typeof runNodeMain>[0] & { stdout: NodeJS.WriteStream });
+
+      expect(exitCode).toBe(0);
+      const childArgs = spawnCalls.at(-1)?.args ?? [];
+      expect(childArgs).toEqual(["openclaw.mjs", "qa", "matrix"]);
+      expect(spawnCalls.at(-1)?.env.OPENCLAW_RUN_NODE_OUTPUT_LOG).toBeUndefined();
+    });
+  });
+
   it("skips rebuilding when dist is current and the source tree is clean", async () => {
     await withTempDir({ prefix: "openclaw-run-node-" }, async (tmp) => {
       await setupTrackedProject(tmp, {