Maintainers

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

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

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 (usa)

Default gems Maintainers

Libraries

lib/abbrev.rb: Akinori MUSHA (knu) github.com/ruby/abbrev rubygems.org/gems/abbrev
lib/base64.rb: Yusuke Endoh (mame) github.com/ruby/base64 rubygems.org/gems/base64
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/csv.rb: Kenta Murata (mrkn), Kouhei Sutou (kou) github.com/ruby/csv rubygems.org/gems/csv
lib/English.rb: unmaintained github.com/ruby/English rubygems.org/gems/English
lib/debug.rb: unmaintained github.com/ruby/debug
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/drb.rb, lib/drb/*: Masatoshi SEKI (seki) github.com/ruby/drb rubygems.org/gems/drb
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 (ktsj) github.com/ruby/find rubygems.org/gems/find
lib/forwardable.rb: Keiju ISHITSUKA (keiju) github.com/ruby/forwardable rubygems.org/gems/forwardable
lib/getoptlong.rb: unmaintained github.com/ruby/getoptlong rubygems.org/gems/getoptlong
lib/ipaddr.rb: Akinori MUSHA (knu) github.com/ruby/ipaddr rubygems.org/gems/ipaddr
lib/irb.rb, lib/irb/*: aycabta 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/mutex_m.rb: Keiju ISHITSUKA (keiju) github.com/ruby/mutex_m rubygems.org/gems/mutex_m
lib/net/http.rb, lib/net/https.rb: NARUSE, Yui (naruse) 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/observer.rb: unmaintained github.com/ruby/observer rubygems.org/gems/observer
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/pstore.rb: unmaintained github.com/ruby/pstore rubygems.org/gems/pstore
lib/racc.rb, lib/racc/*: Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/racc rubygems.org/gems/racc
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/resolv-replace.rb: Tanaka Akira (akr) github.com/ruby/resolv-replace rubygems.org/gems/resolv-replace
lib/rdoc.rb, lib/rdoc/*: Eric Hodel (drbrain), Hiroshi SHIBATA (hsbt) github.com/ruby/rdoc rubygems.org/gems/rdoc
lib/readline.rb: aycabta github.com/ruby/readline rubygems.org/gems/readline
lib/reline.rb, lib/reline/*: aycabta github.com/ruby/reline rubygems.org/gems/reline
lib/rinda/*: Masatoshi SEKI (seki) github.com/ruby/rinda rubygems.org/gems/rinda
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/*: YAMADA, Akira (akira) 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/bigdecimal: Kenta Murata (mrkn) github.com/ruby/bigdecimal rubygems.org/gems/bigdecimal
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: Ruby core team github.com/ruby/etc rubygems.org/gems/etc
ext/fcntl: Ruby core team 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 (naruse), Hiroshi SHIBATA (hsbt) github.com/flori/json rubygems.org/gems/json
ext/nkf: NARUSE, Yui (naruse) github.com/ruby/nkf rubygems.org/gems/nkf
ext/openssl: Kazuki Yamaguchi (rhe) 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/racc: Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/racc rubygems.org/gems/racc
ext/readline: TAKAO Kouji (kouji) github.com/ruby/readline-ext rubygems.org/gems/readline-ext
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/syslog: Akinori MUSHA (knu) github.com/ruby/syslog rubygems.org/gems/syslog
ext/win32ole: Masaki Suketa (suke) github.com/ruby/win32ole rubygems.org/gems/win32ole
ext/zlib: NARUSE, Yui (naruse) github.com/ruby/zlib rubygems.org/gems/zlib

Bundled gems upstream repositories

minitest: github.com/seattlerb/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

Platform Maintainers

mswin64 (Microsoft Windows): NAKAMURA Usaku (usa)
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 (jeremyevans0)
cygwin, …: none. (Maintainer WANTED)
WebAssembly/WASI: Yuta Saito (katei)