Between infrastructure and code, I keep notes on what I learn and try.
# Today's Log
resource "aws_s3_bucket" "example" {
bucket = "hiroe-tech-notes"
acl = "private"
tags = {
Name = "hiroe-tech-notes-bucket"
}
}# Memo: Enable versioning too
# → Continues in articles...
Trying to implement real-time editing and diff display with Emacs, using WezTerm for screen splitting and CUI environment for agent commands.
Making the home PC accessible from outside securely with OpenCode and Cloudflare, enabling progress checks and instructions.
Muse Spark 1.3 is cheap and high-performance but requires privacy considerations.
Confirmed ChatGPT's sandbox environment and Docker existence through command execution. Verified its authenticity through hash checks.
$ sbx lsTo install Ruby in Docker Sandboxes, install libraries with rbenv and set environment variables.
$ sbx run opencode -m 20g -cpus 10When running AI tools with Docker Sandboxes, you can specify CPU and memory. Default is 50% of host memory and all CPUs. Example: 'sbx run ... -m 20g -cpus 10'.
curl -fsSL https://get.docker.com | sudo REPO_ONLY=1 sh
sudo apt-get install docker-sbxTried OpenCode with Docker Sandboxes. Needed network permissions and troubleshooting to confirm operation.
Solved the sub-agent automatic call issue with manual specification, improving implementation efficiency and cost reduction.
npx playwright install chromiumEnable AI agents to confirm browser displays in WSL and OpenCode environments. Automate UI verification using Playwright's headless browser.
This article explains how to define sub-agents in Codex and assign roles. It covers setting up agents for bug fixes and security reviews, model selection, and git management considerations.
require "resend"
Resend.api_key = "re_xxxxxxxxx"
params = {
"from": "[email protected]",
"to": "[email protected]",
"subject": "Hello World",
"html": "<strong>it works!</strong>"
}
sent = Resend::Emails.send(params)
puts sentResend's free email service is easy to use with HTTP API and official libraries. Simplifies email sending in cloud environments. Suitable for personal use with free quotas.
Startup IT Infrastructure: Cloudflare + Akamai for cost-effective Rails + PostgreSQL setup. Ensuring scalability for under 10,000 yen monthly.
The web in the AI era is evolving toward agent computing. MCP and Generative UI drive protocol changes, with WebMCP and local AI becoming crucial.
Implemented a blog translation feature with GPT-5.6 Sol. Slower than DeepSeekV4 but faster than 5.5, implemented with Cloudflare and Rails.
Completed upgrading from Ruby 3.4 to 4.0.5 using OpenCode skills in 10 minutes. Automated the process from research to testing, and created a Rails skill as well.
The minimum server configuration for a personal blog costs ¥916/month using ConoHa VPS and Cloudflare. Development tools cost ¥4600/month, with AI usage being the main expense. Cost verification for stable operations.
Project Settings: .opencode/skills/<name>/SKILL.md
Project Claude Compatibility: .claude/skills/<name>/SKILL.md
Project Agent Compatibility: .agents/skills/<name>/SKILL.mdUtilize OpenCode's skills by saving SKILL.md in project or home directories. Describe name and description in YAML to enable automatic security checks before git commit. Easy to adjust rules in Japanese.
Switching from Codex to OpenCode Go, currently testing multiple models with a $10 monthly plan. Planning to switch between GLM-5.2 and DeepSeek V4 Flash based on difficulty.
Cloudflare's DNS protects servers by hiding the origin server's IP address and relaying traffic through edge locations via the proxy function to block cyber attacks.
$ ./bin/kamal setupKamal is a deployment tool for Ruby on Rails that automates Docker image generation and server deployment, suitable for small-scale systems.
export CLOUDFLARE_ACCOUNT_ID="..."
export CLOUDFLARE_AI_API_TOKEN="..."Added AI features to the blog application to automatically generate slugs and summaries. Using Qwen3 via Cloudflare Workers AI, the data remains on Cloudflare.