diff --git a/scripts/src/hwlab-node.ts b/scripts/src/hwlab-node.ts
index ca485b63..3b014502 100644
--- a/scripts/src/hwlab-node.ts
+++ b/scripts/src/hwlab-node.ts
@@ -23,6 +23,8 @@ interface NodeWebProbeRunOptions {
   waitAfterSubmitMs: number;
   waitMessagesMs: number;
   waitAgentTerminalMs: number;
+  traceSampleCount: number;
+  traceSampleIntervalMs: number;
   message: string | null;
   conversationId: string | null;
   freshSession: boolean;
@@ -3627,6 +3629,8 @@ function parseNodeWebProbeOptions(args: string[]): NodeWebProbeOptions {
     "--wait-after-submit-ms",
     "--wait-messages-ms",
     "--wait-agent-terminal-ms",
+    "--trace-sample-count",
+    "--trace-sample-interval-ms",
     "--message",
     "--conversation-id",
     "--command-timeout-seconds",
@@ -3643,6 +3647,8 @@ function parseNodeWebProbeOptions(args: string[]): NodeWebProbeOptions {
     waitAfterSubmitMs: positiveIntegerOption(args, "--wait-after-submit-ms", 1500, 60000),
     waitMessagesMs: positiveIntegerOption(args, "--wait-messages-ms", 2500, 60000),
     waitAgentTerminalMs: positiveIntegerOption(args, "--wait-agent-terminal-ms", 0, 600000),
+    traceSampleCount: positiveIntegerOption(args, "--trace-sample-count", 0, 200),
+    traceSampleIntervalMs: positiveIntegerOption(args, "--trace-sample-interval-ms", 0, 60000),
     message: optionValue(args, "--message") ?? null,
     conversationId: optionValue(args, "--conversation-id") ?? null,
     freshSession: args.includes("--fresh-session"),
@@ -3696,6 +3702,7 @@ function runNodeWebProbe(options: NodeWebProbeOptions): Record<string, unknown>
     "--wait-messages-ms", String(options.waitMessagesMs),
   ];
   if (options.waitAgentTerminalMs > 0) probeArgs.push("--wait-agent-terminal-ms", String(options.waitAgentTerminalMs));
+  if (options.traceSampleCount > 0) probeArgs.push("--trace-sample-count", String(options.traceSampleCount), "--trace-sample-interval-ms", String(options.traceSampleIntervalMs));
   if (options.freshSession) probeArgs.push("--fresh-session");
   if (!options.cancelRunning) probeArgs.push("--no-cancel-running");
   if (options.conversationId !== null) probeArgs.push("--conversation-id", options.conversationId);