Maintainers

This page describes the current branch, module, library, and extension maintainers of Ruby.

Branch Maintainers

A branch maintainer is responsible for backporting commits into stable branches and publishing Ruby patch releases.

The list of current branch maintainers is available in the wiki.

Module Maintainers

A module maintainer is responsible for a certain part of Ruby.

• The maintainer fixes bugs of the part. Particularly, they should fix security vulnerabilities as soon as possible.

• They handle issues related the module on the Redmine or ML.

• They may be discharged by the 3 months rule [ruby-core:25764].

• They have commit right to Ruby’s repository to modify their part in the repository.

• They have “developer” role on the Redmine to modify issues.

• They have authority to decide the feature of their part. But they should always respect discussions on ruby-core/ruby-dev.

A submaintainer of a module is like a maintainer. But the submaintainer does not have authority to change/add a feature on his/her part. They need consensus on ruby-core/ruby-dev before changing/adding. Some of submaintainers have commit right, others don’t.

No maintainer means that there is no specific maintainer for the part now. The member of ruby core team can fix issues at anytime. But major changes need consensus on ruby-core/ruby-dev.

Language core features including security

• Yukihiro Matsumoto (matz)

Evaluator

• Koichi Sasada (ko1)

Core classes

• Yukihiro Matsumoto (matz)

Standard Library Maintainers

lib/mkmf.rb

• No maintainer

lib/rubygems.rb, lib/rubygems/*

• Hiroshi SHIBATA (hsbt)

• github.com/ruby/rubygems

lib/unicode_normalize.rb, lib/unicode_normalize/*

• Martin J. Dürst (duerst)

Standard Library(Extensions) Maintainers

ext/continuation

• Koichi Sasada (ko1)

ext/coverage

• Yusuke Endoh (mame)

ext/fiber

• Koichi Sasada (ko1)

ext/monitor

• Koichi Sasada (ko1)

ext/objspace

• No maintainer

ext/pty

• No maintainer

ext/ripper

• No maintainer

ext/socket

• Tanaka Akira (akr)

• API change needs matz’s approval

ext/win32

• NAKAMURA Usaku (unak)

Default gems(Libraries) Maintainers

lib/bundler.rb, lib/bundler/*

• Hiroshi SHIBATA (hsbt)

• github.com/ruby/rubygems

• rubygems.org/gems/bundler

lib/cgi/escape.rb

• No maintainer

lib/English.rb

• No maintainer

• github.com/ruby/English

• rubygems.org/gems/English

lib/delegate.rb

• No maintainer

• github.com/ruby/delegate

• rubygems.org/gems/delegate

lib/did_you_mean.rb

• Yuki Nishijima (yuki24)

• github.com/ruby/did_you_mean

• rubygems.org/gems/did_you_mean

ext/digest, ext/digest/*

• Akinori MUSHA (knu)

• github.com/ruby/digest

• rubygems.org/gems/digest

lib/erb.rb

• Masatoshi SEKI (seki)

• Takashi Kokubun (k0kubun)

• github.com/ruby/erb

• rubygems.org/gems/erb

lib/error_highlight.rb, lib/error_highlight/*

• Yusuke Endoh (mame)

• github.com/ruby/error_highlight

• rubygems.org/gems/error_highlight

lib/fileutils.rb

• No maintainer

• github.com/ruby/fileutils

• rubygems.org/gems/fileutils

lib/find.rb

• Kazuki Tsujimoto (k-tsj)

• github.com/ruby/find

• rubygems.org/gems/find

lib/forwardable.rb

• Keiju ISHITSUKA (keiju)

• github.com/ruby/forwardable

• rubygems.org/gems/forwardable

lib/ipaddr.rb

• Akinori MUSHA (knu)

• github.com/ruby/ipaddr

• rubygems.org/gems/ipaddr

lib/optparse.rb, lib/optparse/*

• Nobuyuki Nakada (nobu)

• github.com/ruby/optparse

• rubygems.org/gems/optparse

lib/net/http.rb, lib/net/https.rb

• NARUSE, Yui (nurse)

• github.com/ruby/net-http

• rubygems.org/gems/net-http

lib/net/protocol.rb

• No maintainer

• github.com/ruby/net-protocol

• rubygems.org/gems/net-protocol

lib/open3.rb

• No maintainer

• github.com/ruby/open3

• rubygems.org/gems/open3

lib/open-uri.rb

• Tanaka Akira (akr)

• github.com/ruby/open-uri

• rubygems.org/gems/open-uri

lib/pp.rb

• Tanaka Akira (akr)

• github.com/ruby/pp

• rubygems.org/gems/pp

lib/prettyprint.rb

• Tanaka Akira (akr)

• github.com/ruby/prettyprint

• rubygems.org/gems/prettyprint

lib/prism.rb

• Kevin Newton (kddnewton)

• Eileen Uchitelle (eileencodes)

• Aaron Patterson (tenderlove)

• github.com/ruby/prism

• rubygems.org/gems/prism

lib/resolv.rb

• Tanaka Akira (akr)

• github.com/ruby/resolv

• rubygems.org/gems/resolv

lib/securerandom.rb

• Tanaka Akira (akr)

• github.com/ruby/securerandom

• rubygems.org/gems/securerandom

lib/shellwords.rb

• Akinori MUSHA (knu)

• github.com/ruby/shellwords

• rubygems.org/gems/shellwords

lib/singleton.rb

• Yukihiro Matsumoto (matz)

• github.com/ruby/singleton

• rubygems.org/gems/singleton

lib/tempfile.rb

• No maintainer

• github.com/ruby/tempfile

• rubygems.org/gems/tempfile

lib/time.rb

• Tanaka Akira (akr)

• github.com/ruby/time

• rubygems.org/gems/time

lib/timeout.rb

• Yukihiro Matsumoto (matz)

• github.com/ruby/timeout

• rubygems.org/gems/timeout

lib/tmpdir.rb

• No maintainer

• github.com/ruby/tmpdir

• rubygems.org/gems/tmpdir

lib/tsort.rb

• Tanaka Akira (akr)

• github.com/ruby/tsort

• rubygems.org/gems/tsort

lib/un.rb

• WATANABE Hirofumi (eban)

• github.com/ruby/un

• rubygems.org/gems/un

lib/uri.rb, lib/uri/*

• NARUSE, Yui (nurse)

• github.com/ruby/uri

• rubygems.org/gems/uri

lib/yaml.rb, lib/yaml/*

• Aaron Patterson (tenderlove)

• Hiroshi SHIBATA (hsbt)

• github.com/ruby/yaml

• rubygems.org/gems/yaml

lib/weakref.rb

• No maintainer

• github.com/ruby/weakref

• rubygems.org/gems/weakref

Default gems(Extensions) Maintainers

ext/cgi

• Nobuyoshi Nakada (nobu)

ext/date

• No maintainer

• github.com/ruby/date

• rubygems.org/gems/date

ext/etc

• No maintainer

• github.com/ruby/etc

• rubygems.org/gems/etc

ext/fcntl

• No maintainer

• github.com/ruby/fcntl

• rubygems.org/gems/fcntl

ext/io/console

• Nobuyuki Nakada (nobu)

• github.com/ruby/io-console

• rubygems.org/gems/io-console

ext/io/nonblock

• Nobuyuki Nakada (nobu)

• github.com/ruby/io-nonblock

• rubygems.org/gems/io-nonblock

ext/io/wait

• Nobuyuki Nakada (nobu)

• github.com/ruby/io-wait

• rubygems.org/gems/io-wait

ext/json

• NARUSE, Yui (nurse)

• Hiroshi SHIBATA (hsbt)

• Jean Boussier (byroot)

• github.com/ruby/json

• rubygems.org/gems/json

ext/openssl

• Kazuki Yamaguchi (rhenium)

• github.com/ruby/openssl

• rubygems.org/gems/openssl

ext/pathname

• Tanaka Akira (akr)

• github.com/ruby/pathname

• rubygems.org/gems/pathname

ext/psych

• Aaron Patterson (tenderlove)

• Hiroshi SHIBATA (hsbt)

• github.com/ruby/psych

• rubygems.org/gems/psych

ext/stringio

• Nobuyuki Nakada (nobu)

• github.com/ruby/stringio

• rubygems.org/gems/stringio

ext/strscan

• Kouhei Sutou (kou)

• github.com/ruby/strscan

• rubygems.org/gems/strscan

ext/zlib

• NARUSE, Yui (nurse)

• github.com/ruby/zlib

• rubygems.org/gems/zlib

Bundled gems upstream repositories and maintainers

The maintanance policy of bundled gems is different from Module Maintainers above. Please check the policies for each repository.

The ruby core team tries to maintain the repositories with no maintainers. It may needs to make consensus on ruby-core/ruby-dev before making major changes.

minitest

• Ryan Davis (zenspider)

• github.com/minitest/minitest

• rubygems.org/gems/minitest

power_assert

• Tsujimoto Kenta (k-tsj)

• github.com/ruby/power_assert

• rubygems.org/gems/power_assert

rake

• Hiroshi SHIBATA (hsbt)

• github.com/ruby/rake

• rubygems.org/gems/rake

test-unit

• Kouhei Sutou (kou)

• github.com/test-unit/test-unit

• rubygems.org/gems/test-unit

rexml

• Kouhei Sutou (kou)

• github.com/ruby/rexml

• rubygems.org/gems/rexml

rss

• Kouhei Sutou (kou)

• github.com/ruby/rss

• rubygems.org/gems/rss

net-ftp

• Shugo Maeda (shugo)

• github.com/ruby/net-ftp

• rubygems.org/gems/net-ftp

net-imap

• Nicholas A. Evans (nevans)

• github.com/ruby/net-imap

• rubygems.org/gems/net-imap

net-pop

• github.com/ruby/net-pop

• rubygems.org/gems/net-pop

net-smtp

• TOMITA Masahiro (tmtm)

• github.com/ruby/net-smtp

• rubygems.org/gems/net-smtp

matrix

• Marc-André Lafortune (marcandre)

• github.com/ruby/matrix

• rubygems.org/gems/matrix

prime

• github.com/ruby/prime

• rubygems.org/gems/prime

rbs

• Soutaro Matsumoto (soutaro)

• github.com/ruby/rbs

• rubygems.org/gems/rbs

typeprof

• Yusuke Endoh (mame)

• github.com/ruby/typeprof

• rubygems.org/gems/typeprof

debug

• Koichi Sasada (ko1)

• github.com/ruby/debug

• rubygems.org/gems/debug

racc

• Yuichi Kaneko (yui-knk)

• github.com/ruby/racc

• rubygems.org/gems/racc

mutex_m

• github.com/ruby/mutex_m

• rubygems.org/gems/mutex_m

getoptlong

• github.com/ruby/getoptlong

• rubygems.org/gems/getoptlong

base64

• Yusuke Endoh (mame)

• github.com/ruby/base64

• rubygems.org/gems/base64

bigdecimal

• Kenta Murata (mrkn)

• github.com/ruby/bigdecimal

• rubygems.org/gems/bigdecimal

observer

• github.com/ruby/observer

• rubygems.org/gems/observer

abbrev

• Akinori MUSHA (knu)

• github.com/ruby/abbrev

• rubygems.org/gems/abbrev

resolv-replace

• Akira TANAKA (akr)

• github.com/ruby/resolv-replace

• rubygems.org/gems/resolv-replace

rinda

• Masatoshi SEKI (seki)

• github.com/ruby/rinda

• rubygems.org/gems/rinda

drb

• Masatoshi SEKI (seki)

• github.com/ruby/drb

• rubygems.org/gems/drb

nkf

• Naruse Yusuke (nurse)

• github.com/ruby/nkf

• rubygems.org/gems/nkf

syslog

• Akinori Musha (knu)

• github.com/ruby/syslog

• rubygems.org/gems/syslog

csv

• Kouhei Sutou (kou)

• github.com/ruby/csv

• rubygems.org/gems/csv

ostruct

• Marc-André Lafortune (marcandre)

• github.com/ruby/ostruct

• rubygems.org/gems/ostruct

pstore

• github.com/ruby/pstore

• rubygems.org/gems/pstore

benchmark

• github.com/ruby/benchmark

• rubygems.org/gems/benchmark

logger

• Naotoshi Seo (sonots)

• github.com/ruby/logger

• rubygems.org/gems/logger

rdoc

• Stan Lo (st0012)

• Nobuyoshi Nakada (nobu)

• github.com/ruby/rdoc

• rubygems.org/gems/rdoc

win32ole

• Masaki Suketa (suketa)

• github.com/ruby/win32ole

• rubygems.org/gems/win32ole

irb

• Tomoya Ishida (tompng)

• Stan Lo (st0012)

• Mari Imaizumi (ima1zumi)

• HASUMI Hitoshi (hasumikin)

• github.com/ruby/irb

• rubygems.org/gems/irb

reline

• Tomoya Ishida (tompng)

• Stan Lo (st0012)

• Mari Imaizumi (ima1zumi)

• HASUMI Hitoshi (hasumikin)

• github.com/ruby/reline

• rubygems.org/gems/reline

readline

• github.com/ruby/readline

• rubygems.org/gems/readline

fiddle

• Kouhei Sutou (kou)

• github.com/ruby/fiddle

• rubygems.org/gems/fiddle

repl_type_completor

• Tomoya Ishida (tompng)

• github.com/ruby/repl_type_completor

• rubygems.org/gems/repl_type_completor

Platform Maintainers

mswin64 (Microsoft Windows)

• NAKAMURA Usaku (unak)

mingw32 (Minimalist GNU for Windows)

• Nobuyoshi Nakada (nobu)

AIX

• Yutaka Kanemoto (kanemoto)

FreeBSD

• Akinori MUSHA (knu)

Solaris

• Naohisa Goto (ngoto)

RHEL, CentOS

• KOSAKI Motohiro (kosaki)

macOS

• Kenta Murata (mrkn)

OpenBSD

• Jeremy Evans (jeremyevans)

cygwin, …

• No maintainer

WebAssembly/WASI

• Yuta Saito (kateinoigakukun)