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)

rgarcia

#!/usr/bin/env bash

set -e

cd /tmp
rm -rf /tmp/mock
mkdir /tmp/mock
cd /tmp/mock

git clone https://github.com/golang/mock mock-before

rgarcia

package main

import (
	"fmt"
	"log"

	"gopkg.in/yaml.v2"
)

const withAlias = `foo:

rgarcia

github.com/eapache/go-resiliency/breaker

func New(errorThreshold, successThreshold int, timeout time.Duration) *Breaker

New constructs a new circuit-breaker that starts closed. From closed, the breaker opens if "errorThreshold" errors are seen without an error-free period of at least "timeout". From open, the breaker half-closes after "timeout". From half-open, the breaker closes after "successThreshold" consecutive successes, or opens on a single error.

rgarcia

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"time"

	"golang.org/x/net/context/ctxhttp"