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.

Language core features including security

• Yukihiro Matsumoto (matz)

Evaluator

• Koichi Sasada (ko1)

Core classes

• Yukihiro Matsumoto (matz)

Standard Library Maintainers

Libraries

lib/mkmf.rb

• unmaintained

lib/rubygems.rb, lib/rubygems/*

• Eric Hodel (drbrain)

• Hiroshi SHIBATA (hsbt)

• github.com/rubygems/rubygems

lib/unicode_normalize.rb, lib/unicode_normalize/*

• Martin J. Dürst (duerst)

Extensions

ext/continuation

• Koichi Sasada (ko1)

ext/coverage

• Yusuke Endoh (mame)

ext/fiber

• Koichi Sasada (ko1)

ext/monitor

• Koichi Sasada (ko1)

ext/objspace

• unmaintained

ext/pty

• unmaintained

ext/ripper

• unmaintained

ext/socket

• Tanaka Akira (akr)

• API change needs matz’s approval

ext/win32

• NAKAMURA Usaku (unak)

Default gems Maintainers

Libraries

lib/benchmark.rb

• unmaintained

• github.com/ruby/benchmark

• rubygems.org/gems/benchmark

lib/bundler.rb, lib/bundler/*

• Hiroshi SHIBATA (hsbt)

• github.com/rubygems/rubygems

• rubygems.org/gems/bundler

lib/cgi.rb, lib/cgi/*

• unmaintained

• github.com/ruby/cgi

• rubygems.org/gems/cgi

lib/English.rb

• unmaintained

• github.com/ruby/English

• rubygems.org/gems/English

lib/delegate.rb

• unmaintained

• 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

• unmaintained

• 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/irb.rb, lib/irb/*

• Stan Lo (st0012)

• Tomoya Ishida (tompng)

• Mari Imaizumi (ima1zumi)

• Hitoshi Hasumi (hasumikin)

• github.com/ruby/irb

• rubygems.org/gems/irb

lib/optparse.rb, lib/optparse/*

• Nobuyuki Nakada (nobu)

• github.com/ruby/optparse

lib/logger.rb

• Naotoshi Seo (sonots)

• github.com/ruby/logger

• rubygems.org/gems/logger

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

• unmaintained

• github.com/ruby/net-protocol

• rubygems.org/gems/net-protocol

lib/open3.rb

• unmaintained

• github.com/ruby/open3

• rubygems.org/gems/open3

lib/open-uri.rb

• Tanaka Akira (akr)

• github.com/ruby/open-uri

lib/ostruct.rb

• Marc-André Lafortune (marcandre)

• github.com/ruby/ostruct

• rubygems.org/gems/ostruct

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/pstore.rb

• unmaintained

• github.com/ruby/pstore

• rubygems.org/gems/pstore

lib/readline.rb

• aycabta

• github.com/ruby/readline

• rubygems.org/gems/readline

lib/resolv.rb

• Tanaka Akira (akr)

• github.com/ruby/resolv

• rubygems.org/gems/resolv

lib/rdoc.rb, lib/rdoc/*

• Eric Hodel (drbrain)

• Hiroshi SHIBATA (hsbt)

• Stan Lo (st0012)

• Colby Swandale (colby-swandale)

• github.com/ruby/rdoc

• rubygems.org/gems/rdoc

lib/reline.rb, lib/reline/*

• Tomoya Ishida (tompng)

• Mari Imaizumi (ima1zumi)

• Stan Lo (st0012)

• Hitoshi Hasumi (hasumikin)

• github.com/ruby/reline

• rubygems.org/gems/reline

lib/securerandom.rb

• Tanaka Akira (akr)

• github.com/ruby/securerandom

• rubygems.org/gems/securerandom

lib/set.rb

• Akinori MUSHA (knu)

• github.com/ruby/set

• rubygems.org/gems/set

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

• unmaintained

• 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/thwait.rb

• Keiju ISHITSUKA (keiju)

• github.com/ruby/thwait

• rubygems.org/gems/thwait

lib/tmpdir.rb

• unmaintained

• 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

• unmaintained

• github.com/ruby/weakref

• rubygems.org/gems/weakref

Extensions

ext/cgi

• Nobuyoshi Nakada (nobu)

• github.com/ruby/cgi

• rubygems.org/gems/cgi

ext/date

• unmaintained

• github.com/ruby/date

• rubygems.org/gems/date

ext/etc

• unmaintained

• github.com/ruby/etc

• rubygems.org/gems/etc

ext/fcntl

• unmaintained

• github.com/ruby/fcntl

• rubygems.org/gems/fcntl

ext/fiddle

• Aaron Patterson (tenderlove)

• github.com/ruby/fiddle

• rubygems.org/gems/fiddle

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/win32ole

• Masaki Suketa (suketa)

• github.com/ruby/win32ole

• rubygems.org/gems/win32ole

ext/zlib

• NARUSE, Yui (nurse)

• github.com/ruby/zlib

• rubygems.org/gems/zlib

Bundled gems upstream repositories

minitest

• github.com/minitest/minitest

power_assert

• github.com/ruby/power_assert

rake

• github.com/ruby/rake

test-unit

• github.com/test-unit/test-unit

rexml

• github.com/ruby/rexml

rss

• github.com/ruby/rss

net-ftp

• github.com/ruby/net-ftp

net-imap

• github.com/ruby/net-imap

net-pop

• github.com/ruby/net-pop

net-smtp

• github.com/ruby/net-smtp

matrix

• github.com/ruby/matrix

prime

• github.com/ruby/prime

rbs

• github.com/ruby/rbs

typeprof

• github.com/ruby/typeprof

debug

• github.com/ruby/debug

racc

• github.com/ruby/racc

mutex_m

• github.com/ruby/mutex_m

getoptlong

• github.com/ruby/getoptlong

base64

• github.com/ruby/base64

bigdecimal

• github.com/ruby/bigdecimal

observer

• github.com/ruby/observer

abbrev

• github.com/ruby/abbrev

resolv-replace

• github.com/ruby/resolv-replace

rinda

• github.com/ruby/rinda

drb

• github.com/ruby/drb

nkf

• github.com/ruby/nkf

syslog

• github.com/ruby/syslog

csv

• github.com/ruby/csv

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, …

• none. (Maintainer WANTED)

WebAssembly/WASI

• Yuta Saito (kateinoigakukun)