fix(test): sample direct POSIX gateway process

scripts/e2e/kitchen-sink-rpc-walk.mjs

@@ -1873,12 +1873,14 @@ async function samplePosixProcessTree(pid, run, commandLineNeedles) {
     if (hasMalformedProcessTreeRows(malformedRows, rootTreeRows)) {
       return null;
     }
+    const rootRow = rootTreeRows.find((row) => row.processId === safePid) ?? null;
     const descendants = rootTreeRows.filter((row) => row.processId !== safePid);
-    const commandMatches = descendants.filter((row) =>
+    const matchesCommandNeedles = (row) =>
       commandLineNeedles.every((needle) =>
         row.command.toLowerCase().includes(needle.toLowerCase()),
-      ),
-    );
+      );
+    const commandMatches = descendants.filter(matchesCommandNeedles);
+    const rootCommandMatches = rootRow && matchesCommandNeedles(rootRow) ? [rootRow] : [];
     const gatewayTitleMatches = descendants.filter((row) =>
       row.command.toLowerCase().includes("openclaw-gateway"),
     );
@@ -1887,7 +1889,9 @@ async function samplePosixProcessTree(pid, run, commandLineNeedles) {
         ? commandMatches
         : gatewayTitleMatches.length > 0
           ? gatewayTitleMatches
-          : descendants,
+          : descendants.length > 0
+            ? descendants
+            : rootCommandMatches,
     );
     if (!selected) {
       return null;

test/scripts/kitchen-sink-rpc-walk.test.ts

@@ -1739,6 +1739,25 @@ describe("kitchen-sink RPC process sampling", () => {
     });
   });
 
+  it("samples the POSIX gateway root when command-line needles match", async () => {
+    const sample = await sampleProcess(4321, {
+      platform: "darwin",
+      posixCommandLineNeedles: ["gateway", "--port", "19080"],
+      runCommand: async () => ({
+        stdout:
+          " 4321     1  262144  12.5 node dist/index.js gateway --port 19080 --bind loopback\n",
+        stderr: "",
+      }),
+    });
+
+    expect(sample).toEqual({
+      aggregateRssMiB: 256,
+      cpuPercent: 12.5,
+      processId: 4321,
+      rssMiB: 256,
+    });
+  });
+
   it("falls back to the POSIX gateway process title when the port arg is rewritten", async () => {
     const sample = await sampleProcess(4321, {
       platform: "darwin",