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.
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The maintainer fixes bugs of the part. Particularly, they should fix security vulnerabilities as soon as possible. 
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They handle issues related the module on the Redmine or ML. 
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They may be discharged by the 3 months rule [ruby-core:25764]. 
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They have commit right to Ruby’s repository to modify their part in the repository. 
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They have “developer” role on the Redmine to modify issues. 
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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
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unmaintained 
- lib/rubygems.rb, lib/rubygems/*
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Eric Hodel (drbrain), Hiroshi SHIBATA (hsbt) github.com/rubygems/rubygems 
- lib/unicode_normalize.rb, lib/unicode_normalize/*
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Martin J. Dürst 
Extensions¶ ↑
- ext/continuation
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Koichi Sasada (ko1) 
- ext/coverage
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Yusuke Endoh (mame) 
- ext/fiber
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Koichi Sasada (ko1) 
- ext/monitor
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Koichi Sasada (ko1) 
- ext/objspace
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unmaintained 
- ext/pty
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unmaintained 
- ext/ripper
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unmaintained 
- ext/socket
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Tanaka Akira (akr) 
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API change needs matz’s approval 
 
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- ext/win32
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NAKAMURA Usaku (usa) 
Default gems Maintainers¶ ↑
Libraries¶ ↑
- lib/abbrev.rb
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Akinori MUSHA (knu) github.com/ruby/abbrev rubygems.org/gems/abbrev 
- lib/base64.rb
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Yusuke Endoh (mame) github.com/ruby/base64 rubygems.org/gems/base64 
- lib/benchmark.rb
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unmaintained github.com/ruby/benchmark rubygems.org/gems/benchmark 
- lib/bundler.rb, lib/bundler/*
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Hiroshi SHIBATA (hsbt) github.com/rubygems/rubygems rubygems.org/gems/bundler 
- lib/cgi.rb, lib/cgi/*
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unmaintained github.com/ruby/cgi rubygems.org/gems/cgi 
- lib/csv.rb
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Kenta Murata (mrkn), Kouhei Sutou (kou) github.com/ruby/csv rubygems.org/gems/csv 
- lib/English.rb
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unmaintained github.com/ruby/English rubygems.org/gems/English 
- lib/debug.rb
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unmaintained github.com/ruby/debug 
- lib/delegate.rb
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unmaintained github.com/ruby/delegate rubygems.org/gems/delegate 
- lib/did_you_mean.rb
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Yuki Nishijima (yuki24) github.com/ruby/did_you_mean rubygems.org/gems/did_you_mean 
- ext/digest, ext/digest/*
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Akinori MUSHA (knu) github.com/ruby/digest rubygems.org/gems/digest 
- lib/drb.rb, lib/drb/*
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Masatoshi SEKI (seki) github.com/ruby/drb rubygems.org/gems/drb 
- lib/erb.rb
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Masatoshi SEKI (seki), Takashi Kokubun (k0kubun) github.com/ruby/erb rubygems.org/gems/erb 
- lib/error_highlight.rb, lib/error_highlight/*
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Yusuke Endoh (mame) github.com/ruby/error_highlight rubygems.org/gems/error_highlight 
- lib/fileutils.rb
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unmaintained github.com/ruby/fileutils rubygems.org/gems/fileutils 
- lib/find.rb
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Kazuki Tsujimoto (ktsj) github.com/ruby/find rubygems.org/gems/find 
- lib/forwardable.rb
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Keiju ISHITSUKA (keiju) github.com/ruby/forwardable rubygems.org/gems/forwardable 
- lib/getoptlong.rb
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unmaintained github.com/ruby/getoptlong rubygems.org/gems/getoptlong 
- lib/ipaddr.rb
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Akinori MUSHA (knu) github.com/ruby/ipaddr rubygems.org/gems/ipaddr 
- lib/irb.rb, lib/irb/*
- lib/optparse.rb, lib/optparse/*
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Nobuyuki Nakada (nobu) github.com/ruby/optparse 
- lib/logger.rb
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Naotoshi Seo (sonots) github.com/ruby/logger rubygems.org/gems/logger 
- lib/mutex_m.rb
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Keiju ISHITSUKA (keiju) github.com/ruby/mutex_m rubygems.org/gems/mutex_m 
- lib/net/http.rb, lib/net/https.rb
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NARUSE, Yui (naruse) github.com/ruby/net-http rubygems.org/gems/net-http 
- lib/net/protocol.rb
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unmaintained github.com/ruby/net-protocol rubygems.org/gems/net-protocol 
- lib/observer.rb
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unmaintained github.com/ruby/observer rubygems.org/gems/observer 
- lib/open3.rb
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unmaintained github.com/ruby/open3 rubygems.org/gems/open3 
- lib/open-uri.rb
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Tanaka Akira (akr) github.com/ruby/open-uri 
- lib/ostruct.rb
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Marc-André Lafortune (marcandre) github.com/ruby/ostruct rubygems.org/gems/ostruct 
- lib/pp.rb
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Tanaka Akira (akr) github.com/ruby/pp rubygems.org/gems/pp 
- lib/prettyprint.rb
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Tanaka Akira (akr) github.com/ruby/prettyprint rubygems.org/gems/prettyprint 
- lib/pstore.rb
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unmaintained github.com/ruby/pstore rubygems.org/gems/pstore 
- lib/racc.rb, lib/racc/*
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Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/racc rubygems.org/gems/racc 
- lib/readline.rb
- lib/resolv.rb
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Tanaka Akira (akr) github.com/ruby/resolv rubygems.org/gems/resolv 
- lib/resolv-replace.rb
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Tanaka Akira (akr) github.com/ruby/resolv-replace rubygems.org/gems/resolv-replace 
- lib/rdoc.rb, lib/rdoc/*
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Eric Hodel (drbrain), Hiroshi SHIBATA (hsbt) github.com/ruby/rdoc rubygems.org/gems/rdoc 
- lib/readline.rb
- lib/reline.rb, lib/reline/*
- lib/rinda/*
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Masatoshi SEKI (seki) github.com/ruby/rinda rubygems.org/gems/rinda 
- lib/securerandom.rb
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Tanaka Akira (akr) github.com/ruby/securerandom rubygems.org/gems/securerandom 
- lib/set.rb
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Akinori MUSHA (knu) github.com/ruby/set rubygems.org/gems/set 
- lib/shellwords.rb
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Akinori MUSHA (knu) github.com/ruby/shellwords rubygems.org/gems/shellwords 
- lib/singleton.rb
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Yukihiro Matsumoto (matz) github.com/ruby/singleton rubygems.org/gems/singleton 
- lib/tempfile.rb
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unmaintained github.com/ruby/tempfile rubygems.org/gems/tempfile 
- lib/time.rb
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Tanaka Akira (akr) github.com/ruby/time rubygems.org/gems/time 
- lib/timeout.rb
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Yukihiro Matsumoto (matz) github.com/ruby/timeout rubygems.org/gems/timeout 
- lib/thwait.rb
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Keiju ISHITSUKA (keiju) github.com/ruby/thwait rubygems.org/gems/thwait 
- lib/tmpdir.rb
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unmaintained github.com/ruby/tmpdir rubygems.org/gems/tmpdir 
- lib/tsort.rb
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Tanaka Akira (akr) github.com/ruby/tsort rubygems.org/gems/tsort 
- lib/un.rb
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WATANABE Hirofumi (eban) github.com/ruby/un rubygems.org/gems/un 
- lib/uri.rb, lib/uri/*
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YAMADA, Akira (akira) github.com/ruby/uri rubygems.org/gems/uri 
- lib/yaml.rb, lib/yaml/*
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Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/yaml rubygems.org/gems/yaml 
- lib/weakref.rb
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unmaintained github.com/ruby/weakref rubygems.org/gems/weakref 
Extensions¶ ↑
- ext/bigdecimal
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Kenta Murata (mrkn) github.com/ruby/bigdecimal rubygems.org/gems/bigdecimal 
- ext/cgi
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Nobuyoshi Nakada (nobu) github.com/ruby/cgi rubygems.org/gems/cgi 
- ext/date
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unmaintained github.com/ruby/date rubygems.org/gems/date 
- ext/etc
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Ruby core team github.com/ruby/etc rubygems.org/gems/etc 
- ext/fcntl
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Ruby core team github.com/ruby/fcntl rubygems.org/gems/fcntl 
- ext/fiddle
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Aaron Patterson (tenderlove) github.com/ruby/fiddle rubygems.org/gems/fiddle 
- ext/io/console
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Nobuyuki Nakada (nobu) github.com/ruby/io-console rubygems.org/gems/io-console 
- ext/io/nonblock
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Nobuyuki Nakada (nobu) github.com/ruby/io-nonblock rubygems.org/gems/io-nonblock 
- ext/io/wait
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Nobuyuki Nakada (nobu) github.com/ruby/io-wait rubygems.org/gems/io-wait 
- ext/json
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NARUSE, Yui (naruse), Hiroshi SHIBATA (hsbt) github.com/flori/json rubygems.org/gems/json 
- ext/nkf
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NARUSE, Yui (naruse) github.com/ruby/nkf rubygems.org/gems/nkf 
- ext/openssl
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Kazuki Yamaguchi (rhe) github.com/ruby/openssl rubygems.org/gems/openssl 
- ext/pathname
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Tanaka Akira (akr) github.com/ruby/pathname rubygems.org/gems/pathname 
- ext/psych
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Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/psych rubygems.org/gems/psych 
- ext/racc
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Aaron Patterson (tenderlove), Hiroshi SHIBATA (hsbt) github.com/ruby/racc rubygems.org/gems/racc 
- ext/readline
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TAKAO Kouji (kouji) github.com/ruby/readline-ext rubygems.org/gems/readline-ext 
- ext/stringio
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Nobuyuki Nakada (nobu) github.com/ruby/stringio rubygems.org/gems/stringio 
- ext/strscan
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Kouhei Sutou (kou) github.com/ruby/strscan rubygems.org/gems/strscan 
- ext/syslog
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Akinori MUSHA (knu) github.com/ruby/syslog rubygems.org/gems/syslog 
- ext/win32ole
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Masaki Suketa (suke) github.com/ruby/win32ole rubygems.org/gems/win32ole 
- ext/zlib
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NARUSE, Yui (naruse) github.com/ruby/zlib rubygems.org/gems/zlib 
Bundled gems upstream repositories¶ ↑
- minitest
- power_assert
- rake
- test-unit
- rexml
- rss
- net-ftp
- net-imap
- net-pop
- net-smtp
- matrix
- prime
- rbs
- typeprof
Platform Maintainers¶ ↑
- mswin64 (Microsoft Windows)
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NAKAMURA Usaku (usa) 
- mingw32 (Minimalist GNU for Windows)
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Nobuyoshi Nakada (nobu) 
- AIX
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Yutaka Kanemoto (kanemoto) 
- FreeBSD
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Akinori MUSHA (knu) 
- Solaris
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Naohisa Goto (ngoto) 
- RHEL, CentOS
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KOSAKI Motohiro (kosaki) 
- macOS
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Kenta Murata (mrkn) 
- OpenBSD
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Jeremy Evans (jeremyevans0) 
- cygwin, …
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none. (Maintainer WANTED) 
- WebAssembly/WASI
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Yuta Saito (katei)