diff --git a/scripts/lib/format-generated-module.mjs b/scripts/lib/format-generated-module.mjs
index bfd65997d63..64989c18956 100644
--- a/scripts/lib/format-generated-module.mjs
+++ b/scripts/lib/format-generated-module.mjs
@@ -1,5 +1,6 @@
 import { spawnSync } from "node:child_process";
 import fs from "node:fs";
+import os from "node:os";
 import path from "node:path";
 
 export function formatGeneratedModule(source, { repoRoot, outputPath, errorLabel }) {
@@ -8,27 +9,33 @@ export function formatGeneratedModule(source, { repoRoot, outputPath, errorLabel
     resolvedRepoRoot,
     path.isAbsolute(outputPath) ? path.relative(resolvedRepoRoot, outputPath) : outputPath,
   );
-  const formatterPath = path.relative(resolvedRepoRoot, resolvedOutputPath) || resolvedOutputPath;
   const directFormatterPath = path.join(resolvedRepoRoot, "node_modules", ".bin", "oxfmt");
   const useDirectFormatter = process.platform !== "win32" && fs.existsSync(directFormatterPath);
   const command = useDirectFormatter ? directFormatterPath : "pnpm";
-  const args = useDirectFormatter
-    ? ["--stdin-filepath", formatterPath]
-    : ["exec", "oxfmt", "--stdin-filepath", formatterPath];
-  const formatter = spawnSync(command, args, {
-    cwd: resolvedRepoRoot,
-    input: source,
-    encoding: "utf8",
-    // Windows requires a shell to launch package-manager shim scripts reliably.
-    ...(process.platform === "win32" ? { shell: true } : {}),
-  });
-  if (formatter.status !== 0) {
-    const details =
-      formatter.stderr?.trim() ||
-      formatter.stdout?.trim() ||
-      formatter.error?.message ||
-      "unknown formatter failure";
-    throw new Error(`failed to format generated ${errorLabel}: ${details}`);
+  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-generated-format-"));
+  const tempOutputPath = path.join(tempDir, path.basename(resolvedOutputPath));
+
+  try {
+    fs.writeFileSync(tempOutputPath, source, "utf8");
+    const args = useDirectFormatter
+      ? ["--write", tempOutputPath]
+      : ["exec", "oxfmt", "--write", tempOutputPath];
+    const formatter = spawnSync(command, args, {
+      cwd: resolvedRepoRoot,
+      encoding: "utf8",
+      // Windows requires a shell to launch package-manager shim scripts reliably.
+      ...(process.platform === "win32" ? { shell: true } : {}),
+    });
+    if (formatter.status !== 0) {
+      const details =
+        formatter.stderr?.trim() ||
+        formatter.stdout?.trim() ||
+        formatter.error?.message ||
+        "unknown formatter failure";
+      throw new Error(`failed to format generated ${errorLabel}: ${details}`);
+    }
+    return fs.readFileSync(tempOutputPath, "utf8");
+  } finally {
+    fs.rmSync(tempDir, { recursive: true, force: true });
   }
-  return formatter.stdout;
 }
diff --git a/scripts/test-parallel.mjs b/scripts/test-parallel.mjs
index e46a8255078..e2b442eaaa6 100644
--- a/scripts/test-parallel.mjs
+++ b/scripts/test-parallel.mjs
@@ -55,6 +55,10 @@ const cleanupTempArtifacts = () => {
   if (tempArtifactDir === null) {
     return;
   }
+  if (process.env.OPENCLAW_TEST_KEEP_TEMP_ARTIFACTS === "1") {
+    console.error(`[test-parallel] keeping temp artifacts at ${tempArtifactDir}`);
+    return;
+  }
   fs.rmSync(tempArtifactDir, { recursive: true, force: true });
   tempArtifactDir = null;
 };
@@ -455,12 +459,13 @@ const channelIsolatedEntries = channelIsolatedFiles.map((file) => ({
   name: `${path.basename(file, ".test.ts")}-channels-isolated`,
   args: ["vitest", "run", "--config", "vitest.channels.config.ts", "--pool=forks", file],
 }));
-const defaultUnitFastLaneCount = isCI && !isWindows ? 3 : 1;
+const defaultUnitFastLaneCount = testProfile === "low" ? 8 : isCI && !isWindows ? 3 : 1;
 const unitFastLaneCount = Math.max(
   1,
   parseEnvNumber("OPENCLAW_TEST_UNIT_FAST_LANES", defaultUnitFastLaneCount),
 );
-const defaultUnitFastBatchTargetMs = isCI && !isWindows ? 45_000 : 0;
+const defaultUnitFastBatchTargetMs =
+  testProfile === "low" ? 10_000 : isCI && !isWindows ? 45_000 : 0;
 const unitFastBatchTargetMs = parseEnvNumber(
   "OPENCLAW_TEST_UNIT_FAST_BATCH_TARGET_MS",
   defaultUnitFastBatchTargetMs,
@@ -1665,7 +1670,10 @@ if (serialPrefixRuns.length > 0) {
   if (failedSerialPrefix !== undefined) {
     process.exit(failedSerialPrefix);
   }
-  const deferredRunConcurrency = isMacMiniProfile ? 3 : testProfile === "low" ? 2 : undefined;
+  // Low-profile runs favor stability over overlap once we leave the shared
+  // unit-fast batches; the isolated memory-heavy lanes can still trip over
+  // each other when two singleton Vitest processes overlap.
+  const deferredRunConcurrency = isMacMiniProfile ? 3 : testProfile === "low" ? 1 : undefined;
   const failedDeferredParallel = isMacMiniProfile
     ? await runEntriesWithLimit(deferredParallelRuns, passthroughOptionArgs, deferredRunConcurrency)
     : deferredRunConcurrency