Specials

Seiro MCP, which I released at the end of last year to support development for visionOS,

• Released Seiro MCP, an MCP for Accelerating Development for visionOS

may look like it has not moved much since release, but I actually use it almost every day. Rather than saying I use it, the AI uses it automatically, so when I am developing for visionOS, it is heavily used to check whether the implementation can be built every time, alongside the implementation itself. That Seiro MCP has had about two updates released this month.

Notion has helped me a great deal. After using it for nearly five years, it had become like air, naturally sitting at the center of my life to the point that opening Notion was the first thing I did after waking up. So why did I decide to migrate? A major reason was the change happening in my own environment.

2026 arrived before I knew it, and five days have already passed. The first three days of the New Year barely felt like a holiday, and in any case 2026 has begun. So I am writing my usual New Year's resolution.

2024 was the year I bought Vision Pro, and also the year I launched this site, Yori Hiroi Frontend. Then came 2025. As I wrote in my New Year's resolution, it became a year of pursuing Apple's visionOS ecosystem. Last year's retrospective and resolution are below.

• Looking Back on 2024
• My 2025 New Year's Resolution: Going Even Further All In on visionOS

I usually use Codex CLI as my main AI agent, but at least in my environment, autonomous coding for Swift-based visionOS development did not go well. I decided to take the plunge and create Seiro MCP.

There are many things I want to write about, from the background to the structure and usage, so I will try making this a short series for a while. The repository is here.

• karad/seiro-mcp: Seiro MCP is an MCP server focused on spatial computing development.