koic user

@rubocop core team. @modelcontextprotocol steering group.

Funding Links: https://github.com/sponsors/koic

Koichi ITO · Tokyo, Japan · ESM, Inc. (@esminc) · 537 followers · 199 stars · 304 repositories · joined November 2022

GitHub Sponsors Profile

OSS maintainer. Member of RuboCop core team and MCP steering group.
RuboCop
A member of the RuboCop core team and ranked first on the RuboCop contributor graph:
https://github.com/rubocop/rubocop/graphs/contributors?all=1
The head maintainer for key RuboCop extensions:

RuboCop Performance
RuboCop Rails
RuboCop Minitest

I also maintain the vscode-rubocop extension related to the RuboCop's built-in LSP server.
These are presentations on the core features I have worked on in RuboCop in recent years:

Integration of Server Mode (RubyKaigi 2022)
Integration of LSP and Prism (RubyKaigi 2024)
Integration of Plugin, Ruby LSP Add-on, and Reusable AST (RubyKaigi 2025)
Integration of MCP Server Mode (RubyKaigi 2026)

MCP (Model Context Protocol)
A member of the MCP steering group, primarily as a member of the Ruby SDK team, and ranked first on the Ruby SDK contributor graph:
https://github.com/modelcontextprotocol/ruby-sdk/graphs/contributors?all=1
Others
A committer for these open source software products:

Parser
WebMock
test-queue
Active Record Oracle enhanced adapter
Faker
RVM

I spend a lot of my life every day developing open source software and triaging issues. Support through GitHub Sponsors is one of feedback ways to these activities. Thank you!

koic user

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