rgarcia

Kernel MCP ClawBench replay

• Task: v2-1202-beauty-cart-quantity-theordinary
• Instruction: add 2 units of Multi-Peptide + HA Serum to the cart
• Agent: Codex with GPT-5.6 Luna
• Browser control: Kernel MCP execute_playwright_code only
• Result: intercepted 1.0, strict judge reward 1.0
• Replay: 4× speed, trimmed only before the first site navigation

The run searches for the product, navigates to the correct product page, changes the quantity to 2, and initiates Add to Cart. ClawBench intercepts the Cart-AddProduct request, then verifies that the request adds quantity 2 of the correct product.

rgarcia

PR title

feat(browser-runtime): add native Kernel support

PR description

What does this PR do?

Adds Kernel as a managed browser runtime:

rgarcia

install mitmproxy locally and run mitmdump on 127.0.0.1:8080, expose it with a raw TCP tunnel using ssh -p 443 -T -R0:127.0.0.1:8080 tcp@free.pinggy.io (avoid Cloudflare quick tunnels because they reject proxy CONNECT; use ngrok TCP only if Pinggy fails), verify HTTPS proxying with curl and mitmproxy’s generated CA at ~/.mitmproxy/mitmproxy-ca-cert.pem, then create a Kernel custom HTTP proxy using the Pinggy hostname/port and pass that CA via --ca-bundle; run Kernel’s proxy health check, create a browser with --proxy-id, navigate to several HTTPS sites and send one identifiable POST with a custom header and JSON body, then inspect mitmproxy’s logs/HAR to confirm the decrypted URL, headers, body, HTTP version, and response status; report results and clean up the browser, Kernel proxy, tunnel, and mitmproxy process.

rgarcia

import assert from "node:assert/strict";
import { WorkflowAgent } from "./src/agent.js";
import { runWorkflow } from "./src/workflow.js";

const model = process.env.QA_MODEL ?? "openai-codex/gpt-5.6-sol";
const agent = new WorkflowAgent({ cwd: process.cwd(), mainModel: model });
const sessions: Array<{ thread?: string; id: string }> = [];
const target = agent as unknown as {
  createSessionManager(thread?: string): { getSessionId(): string };
};

rgarcia

Kernel GPU NVENC smoke test results

Summary

We investigated empty replay MP4s from GPU Kernel browsers. The failure is reproducible outside the replay API by running ffmpeg directly inside live GPU browser VMs with h264_nvenc.

Key result: NVENC capability is mixed per GPU browser VM.

• GPU sessions tested with direct ffmpeg -c:v h264_nvenc: 22
• NVENC-capable sessions: 12

rgarcia

Cursor + GPT models: Provider Error caused by overly-complex MCP tool JSON schemas (OpenAI nesting depth limit)

Cursor "Provider Error" with GPT models: MCP tool schema nesting depth

Summary

When using Cursor with MCP (Model Context Protocol) servers, GPT models (gpt-5.3-codex-, gpt-5.2-codex-, etc.) return a generic "Provider Error" that gives no actionable information:

rgarcia

SCP Files to/from Kernel Browser VMs

The Kernel CLI's kernel browsers ssh command (kernel/cli#103) provisions an SSH server on a browser VM and tunnels the connection over WebSockets. Because it sets up a standard OpenSSH server, you can use scp (and rsync, sftp, etc.) with the same tunnel — not just interactive shells.

Prerequisites

1. Kernel CLI v0.14.5+ (with the browsers ssh subcommand and -o json support)

2. websocat — WebSocket-to-TCP bridge used as the SSH ProxyCommand

rgarcia

name	doordash
description	Access DoorDash for food delivery ordering, order history, account management, and restaurant/store browsing.
allowed-tools	Bash(agent-browser:*)

DoorDash.com

Uses agent-browser with Kernel cloud browser provider. See the kernel-agent-browser skill for best practices.

rgarcia

#!/bin/bash
#
# Viewport Debug Script for Kernel Browsers
#
# This script demonstrates the difference between:
# 1. Creating a browser WITH viewport set at creation time
# 2. Creating a browser WITHOUT viewport (uses default 1920x1080)
#
# Usage: ./viewport-debug.sh
#

rgarcia

#!/bin/bash
#
# Kernel Provider Integration Test
# Tests agent-browser CLI with Kernel cloud browser provider
#
# Usage:
#   KERNEL_API_KEY="your-api-key" ./test-kernel-provider.sh
#
# Requirements:
#   - agent-browser built (npm run build && npm run build:native)